114results about How to "Good hydrophilicity" patented technology

The invention relates to a graphene / MXene composite electrode material and application thereof. The graphene / MXene composite electrode material comprises two materials of graphene and MXene. A preparation method of the graphene / MXene composite electrode material comprises the steps of uniformly mixing a graphene oxide suspension liquid and an MXene material suspension liquid, adding hydrazine hydrate and the performing reduction, freezing and drying to obtain the graphene / MXene composite electrode material, wherein the mass ratio of graphene oxide and the MXene material is 1:(0.05-0.5). When graphene and MXene are combined, an irregularly-shaped MXene particle material can be used as an insertion agent and a dispersing agent and enters graphene sheet layers, the agglomeration effect amongthe graphene sheet layers is overcome, and the available specific area of the graphene / MXene composite electrode material is expanded; and moreover, the MXene material has excellent hydrophilcity andconductivity, and thus, the electrochemical performance and the capacitance deionization performance of the composite material can be further improved.

The invention discloses a preparation method for a polyether sulfone / graphene oxide composite ultrafiltration membrane. The preparation method comprises the following steps of ultrasonically dispersing the graphene oxide into an organic solvent to form uniform and stable dispersing liquid; adding polyether sulfone and additive into the dispersing liquid; stirring, dissolving, standing and defoaming to form uniform and stable casting membrane liquid; pouring the casting membrane liquid on a glass plate; scraping the membrane; and immersing into coagulating bath at room temperature to obtain the polyether sulfone / graphene oxide composite ultrafiltration membrane after the membrane is removed automatically, wherein the casting membrane liquid comprises the following components as per mass percentage concentration: 15 to 21 percent of polyether sulfone, 1 to 2 percent of pore-forming agent and 0.5 to 4.0 percent of graphene oxide. The polyether sulfone / graphene oxide composite ultrafiltration membrane has high hydrophilcity, high porosity, static resistance, elasticity and the like and improves the flux of pure water, retention rate, pollution resistance, mechanical property and the like.

The present invention discloses one kind of anticorrosive hydrophilic paint, which consists of prime paint A and surface paint B. The prime paint A consists of modified epoxy resin, modified acrylic resin, amino resin, butyl glycol ether, distilled water, etc; and the surface paint B consists of functional monomer in the structure of CH2=CR1-R2-CH2-CHR3-CH2SO3M, methacrylic acid, hydroxyl acrylate, initiator, distilled water, etc. The anticorrosive hydrophilic paint has high corrosion resistance, high hydrophilicity, high water tolerance, high solvent tolerance and other advantages. It may be painted to the surface of aluminum and aluminum alloy product, especially heat exchanger of air conditioner.

A process for preparing elastic hydrophilic plastic filler for treating water incldues such steps as proportionally mixing plastic particles of PP, PE or PVC or their mixture, powder of water-solublepolyvinyl alcohol, polyacrylamide, or their mixture, and power of quartz, TiO2, SiO2, or their mixture together, granulating, and shaping filler. Its advantages include simple process, high effect and high reliability.

Asymmetrical polysulfone ultrafiltering membrane is first prepared via phase transferring process using chloromethylated polysulfone as base material and is then hydrolyzed to activate and reacted directly or indirectly with hydroxyethyl cellulose solution to form the composite polysulfone-hydroxyethyl cellulose membrane. The preparation process is characterized by the hydrolysis in alkali water solution at 50-90 deg.c to produce hydroxymethyl polysulfone membrane. The prepared composite asymmetrical polysulfone-hydroxyethyl cellulose membrane has coupled hydroxyethyl cellulose amount up to 90-160 mg to each gram polysulfone membrane. The composite membrane has excellent hydrophilicity, low non-specific adsorption, high mechanical strength and ideal pore structure and may be used widely in affinity ultrafiltration.

The invention relates to a cellulose acetate forward osmotic membrane and a preparation method of the cellulose acetate forward osmotic membrane. The preparation method comprises the following steps: preparing raw materials according to a ratio of adding 20ml-40ml of acetone, 50ml-70ml of 1,4-dioxane and 7ml-10ml of methanol into 3g-5g of cellulose acetate; adding a pore former, namely 5ml-10ml of lactic acid or 0.8g-28g of zinc chloride; uniformly mixing the raw materials and completely dissolving the cellulose acetate under room-temperature agitation; standing a membrane casting solution for more than 12 hours; immersing and treating by a sodium hydroxide solution; immersing a mixture into the membrane casting solution for 30-60 seconds; and pulling for one time and immersing into de-ionized water for carrying out phase inversion for 2-6 hours so as to obtain the cellulose acetate forward osmotic membrane, wherein a middle base membrane is a polysulfone membrane and attached cellulose acetate membranes are formed on the two sides of the base membrane. The preparation method is simple in process and the prepared forward osmotic membrane can effectively prevent solutes from entering a porous supporting layer; the cellulose acetate forward osmotic membrane has good chemical stability and high salt rejection rate and membrane flux.

The invention relates to a conductive Cu / PDA / PVDF composite ultrafiltration membrane and a preparation method thereof. The preparation method comprises the following steps: a PVDF ultrafiltration membrane is subjected to PDA modification treatment by use of Tris-HCl as a buffer solution; immersing the modified PDA / PVDF composite ultrafiltration membrane in a silver nitrate solution for catalytic activation treatment; and then placing the modified PDA / PVDF composite ultrafiltration membrane in a plating solution containing 4 mM-12 mM CuCl2, 45-55 mM disodium edetate (EDTA.2Na), 0.08 to 0.12 M boric acid and 0.08 to 0.12 M dimethylamino borane (DMAB) for electroless plating. The conductive Cu / PDA / PVDF composite ultrafiltration membrane has good hydrophilicity, negative charge density, bovineserum albumin (BSA) rejection rate, antibacterial property, electrical conductivity, and excellent anti-pollution performance when an external electric field is applied.

The invention relates to a star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and a preparation method thereof. The star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer is a star hybrid macromolecule which adopts the silsesquioxane as a core and grafted acrylic ester segmented styrene as an arm. The synthesis method of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer comprises the following steps of: synthesizing star silsesquioxane-grafted acrylic ester-styrene segmented copolymer by adopting silsesquioxane containing active chlorine as an initiator, selecting several types of acrylic ester, styrene and the like as comonomer and adopting cuprous chloride / pentamethyl divinyl triamine as a catalytic system through a two-step atom transfer free radical polymerization method; obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer through vitriolization; and obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer macromolecules of different structures by controlling the length of each POSS (Polyhedral Oligomeric Silsesquioxane) star arm, i.e., the constitution and the length of each block, so that the performances of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and the proton exchange membrane thereof are adjusted.

The invention provides an anticoagulant fiber membrane and a preparation method and application thereof. The anticoagulant fiber membrane comprises a polyvinylidene fluoride membrane and a metal organic framework material with a carboxyl group, and the metal organic framework material with the carboxyl group is uniformly dispersed in the polyvinylidene fluoride membrane. The metal organic framework material in the anticoagulant fiber membrane can stably exist in a polyvinylidene fluoride membrane matrix. In addition, the anticoagulant fiber membrane has a good anticoagulant effect, and the result of the embodiment shows that the prothrombin time of the activated part of the anticoagulant fiber membrane is 42-60 seconds, and the anticoagulant effect is better. The anticoagulant fiber membrane has better hydrophilic properties, and the result of the embodiment shows that the contact angle between the anticoagulant fiber membrane and water is 50-80 degrees.

The invention discloses a supercapacitor electrode material added with a manganese cobalt oxide foamed nickel composite material. The supercapacitor electrode material is prepared from, by weight, 5-6 parts of activated carbon, 30-35 parts of a copper nitrate solution with the concentration being 2 wt%, 80-85 parts of pyrrole, 10-12 parts of chitosan, 100-110 parts of an acetic acid solution with the concentration being 2 wt%, 2-3 parts of sodium dodecyl benzene sulfonate, 3-4 parts of ferric chloride, an appropriate amount of 1 mol / L hydrochloric acid, an appropriate amount of 1 mol / L sodium hydroxide, an appropriate amount of deionized water, 2-2.5 parts of cobalt nitrate, 1-1.2 parts of manganous nitrate, 5-6 parts of urea, 7-8 parts of ammonium fluoride, 4-5 parts of nickel foam and an appropriate amount of absolute ethyl alcohol. The obtained composite electrode material is simple in technology and easy to control, and the supercapacitor prepared from the electrode material is stable in performance, large in specific capacitance and excellent in circulation charging and discharging performance.

The invention relates to a hydrophilic modification method of a high-flux PVDF porous membrane. The method comprises the following steps that PVDF powders, tannic acid and PVP are used as raw materials, firstly the PVDF porous membrane is prepared by adopting a phase inversion method, a metal ion solution is used as coagulation bath, by means of the strong complexing capacity of tannic acid with metal ions, a relatively stable molecular chain interpenetrating network structure is formed on the surface of the membrane and inside the membrane, thereby effectively complexing with tannic acid containing a plurality of hydrophilic groups, and the tannic acid has good complexation with PVP, so that more PVP is fixed, and finally a composite hydrophilic channel of tannic acid-PVP-metal ion is formed inside the membrane, so that a PVDF modified membrane with high flux and better hydrophilicity is prepared. The preparation method has the advantages of being wide in raw material source, low in preparation cost and simple in processing technology, and being beneficial for bulk production and marketization application and popularization, and meeting green environmental protection requirements.

The invention relates to a water-based drilling fluid plugging agent. The water-based drilling fluid plugging agent comprises, by mass, 10% to 20% of fibers, 15% to 25% of walnut shells, 20% to 45% of water-absorbent polymer particles, and 40% to 55% of core-shell polymer microspheres. The water-based drilling fluid plugging agent is prepared through uniformly mixing the above raw materials in a content ratio at the normal temperature under normal pressure. The plugging agent is prepared through simple processes, and has good hydrophilicity, good suspension stability, good expansion performance and good plugging effects.

The invention provides a preparation method of a hydrophilic copolymer coated nano-oxide modified hollow fiber membrane. The preparation method is characterized by including following steps: (1), preparing a compound; (2), preparing membrane casting liquid; (3), preparing a modified membrane. A method of adding hydrophilic copolymer coated nano-oxide for blending is adopted, so that organic-inorganic phases of the compound are combined well; less proneness to loss in the process of membrane forming is realized, so that hydrophilic performance of membrane silk is improved, and mechanical performance and penetrating performance of the membrane silk are improved greatly. The preparation method is simple to operate, mild in polymerization reaction conditions and suitable for large-scale production.

The invention discloses a fluorosilicone resin / composite modified nano-material hybrid super-amphiphobic coating and a preparation technology thereof. Coating materials used by the coating include fluorosilicone resin, a dispersing solvent, composite modified nano-SiO2-TiO2 particles, a first coupling agent and a defoamer. A preparation method of the composite modified nano-SiO2-TiO2 particles comprises the following steps: carrying out ball milling mixing on nano-SiO2 and nano-TiO2 to obtain mixed nano-powder, adding the mixed nano-powder and a surfactant to a first solvent, performing dispersing to obtain a mixed nano-powder dispersion, adding a second coupling agent to a mixture of a first solvent and water in order to obtain a coupling agent hydrolysate, dropwise adding the coupling agent hydrolysate to the mixed nano-powder dispersion, and performing stirring, heating and reacting to obtain the composite modified nano-SiO2-TiO2 particles. The composite modification of SiO2-TiO2 nanoparticles can greatly improve the addition amount of the particles without affecting the other properties of the coating, so the fluorosilicone coating has the advantages of real and effective super-amphiphobic property, good wear resistance and simple preparation technology.

The invention provides a novel cell culture method, a cell culture system and application of the cell culture system, and belongs to the field of biological materials and biotechnology. The three-dimensional cell culture system provided by the invention is used for in-vitro cell culture and comprises a packed bed cell reactor, wherein the reactor comprises a composite porous scaffold, and the composite porous scaffold comprises collagen, silk fibroin and hydroxyapatite. The method for three-dimensional cell culturing by using the system comprises the following steps of: setting the three-dimensional cell culture system; supplying the cell reactor with cells and a cell culture solution; and circularly filling the reactor with the cell culture solution, wherein the cell inoculation mode is dynamic inoculation. The porosity of the composite porous scaffold of the cell culture system and the uniformity and permeability of the pore structure are good so as to facilitate the transportation and transmission of moisture, ions and other nutrient substances, to have higher sensitivity to temperature, to respond to the change of ambient temperature, and to control the subsequent release of growth factors.

The invention relates to a tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and a preparation method therefor. By taking mono-functional group-containing <gamma>-chloropropyl polyhedron silsesquioxane (single chloropropyl silsesquioxane) as an initiator, a catalyst, a ligand and an active monomer at a specific proportion are added to a reactor to be synthesized by adopting a two-step atom transfer free group polymerization method; and next, the tadpole-shaped sulfonated POSS-containing hybrid polymer is obtained by adopting a sulfonating mode. According to the designed membrane-forming method, the tadpole-shaped sulfonated POSS-containing hybrid polymer is taken as the raw material, and N, N-dimethylformamide is taken as a solvent to obtain themembrane in a pouring manner. The single-arm-structured and tadpole-shaped organic and inorganic hybrid polymer has high hydrophilia while excellent thermal stability is also ensured by virtue of existence of the POSS core, thereby improving the proton electric conductivity of the proton exchange membrane at a high temperature.

The invention discloses polyurethane foam with ultralow surface hardness and a high press-to-sink ratio. The foam is prepared from a component A and a component B. The component A is prepared from 37-50 parts of polyhydric alcohol 1, 25-50 parts of polyhydric alcohol 2, 0-30 parts of polyhydric alcohol 3, 0-10 parts of polyhydric alcohol 4, 0-18 parts of polyhydric alcohol 5, 0.7-2 parts of surface active agent, 0.4-0.7 part of composite catalyst, 0-5 parts of amine-terminated polyether and 2.5-4 parts of foaming agent. The component B is prepared from 26-42 parts of isocyanate. Polyhydric alcohol 1 is oxirane and epoxypropane copolymerized polyhydric alcohol, polyhydric alcohol 2 is epoxypropane polyether polyol, polyhydric alcohol 3 is allyl alcohol polyether polyol, polyhydric alcohol 4 is vegetable oil polyether polyol, polyhydric alcohol 5 is oxirane end capped epoxypropane polyether polyol, and isocyanate is diphenylmethane diisocyanate. The polyurethane foam has ultralow surface hardness, extremely good supporting performance, the high press-to-sink ratio, and hydrophilia insensitive to temperature changes.

The invention relates to a titanium-based active bone implant and a preparation method thereof, which belong to the technical field of a medical material. The method comprises the following steps: after dopamine is loaded on the surface of pure titanium, a gelatin solution, a dextran amine solution, a gelatin solution, an alpha-melanocyte stimulating hormone solution are subjected to spin coatingin order, wherein spin coating of the gelatin solution, the dextran amine solution, the gelatin solution, and the alpha-melanocyte stimulating hormone solution in order is called the complete spin coating, the number of complete spin coatings is determined according to the actual required release amount of the alpha-melanocyte stimulating hormone, a layer of the gelatin solution is spin-coated after the last complete spin coating is completed, and the material immersed in a solution of a graft polymer formed by grafting right-arm polyethylene glycol amino group with a boric acid ester bond formore than 2 h to prepare the titanium-based active bone implant. The bone implant can release a large amount of alpha-MSH in a short time to reach the effect concentration, and has the ability to promote osteogenic differentiation of bone-related cells. The preparation method of the titanium-based active bone implant is simple and easy to operate, and is suitable for expanding production.

The invention provides an electrospinning dressing loading a growth factor small molecule inhibitor, a preparation method and applications thereof. According to the present invention, the fiber membrane prepared by the electrospinning method has stable physical and chemical properties and high porosity, can isolate contaminants, and is soft and gas-permeable; the fiber membrane prepared by combining the macromolecule polymer and the natural polymer material has strong mechanical performance, wherein the natural polymer can enhance the cytocompatibility of the spinning fiber membrane, such thatthe cells easily grow on the fiber membrane so as to promote the wound healing; the TGF-beta1 inhibitor signaling pathway is clear and is targeted, and can effectively inhibit the scar formation; thefiber membrane has good wettability, can be perfectly matched with wounds with different shapes, and is prepared from the degradable material so as to reduce the secondary damage caused by dressing changing; and the preparation method is simple, the use is convenient, and the product has huge clinical application prospects.

Staple fibers produced by the existing oil are all water-repellent and cannot be applicable for the fields with hydrophilic requirement on the fibers. The invention provides polyester staple fiber hydrophilic spinning oil, which comprises the following components in percentage by weight: 70 to 80 percent of component A, i.e. polyether modified silicone oil; 10 to 20 percent of component B, i.e. isomeric alcohol polyoxyethylene ether phosphate; and 5 to 10 percent of component C, i.e. aliphatic amine polyether. An emulsion is prepared from the three components by adding water. The effective concentration of the emulsion is between 0.3 and 2.5 percent. A pH value of the emulsion is regulated to between 8.0 and 10.0. Not only the polyester staple fiber hydrophilic spinning oil of the invention is suitable for each process of the staple fiber spinning, but also the produced fibers have excellent hydrophilicity. The polyester staple fiber hydrophilic spinning oil can be directly used in the field of non-woven fabric weaving with hydrophilic requirement.

The invention discloses a flexible three-dimensional layered MXene@indium composite film and a preparation method and application thereof. The flexible composite film is prepared by depositing metal indium (In) with a low melting point onto a flexible self-supporting MXene film by a simple and industrial electrodeposition method, wherein indium can be subjected to alloying reaction with metal lithium, and indium has excellent lithium affinity, so nucleation barriers can be effectively reduced, the actual current density in the lithium deposition and dissolution process is reduced, the reduction of deposition dissolution overpotential is facilitated, the uniformity of deposition is improved, the preparation method is simple, the internal lithium ion transmission rate is increased, the lithium deposition direction can be changed, and the battery safety problem caused by the fact that the lithium dendrites pierce the diaphragm is relieved; the composite material has an excellent effect ofinhibiting the growth of the lithium dendrites, the electrodeposition operation is simple and convenient, and large-scale production can be realized, so that the preparation method has the great application value and scientific research value.

The invention belongs to the technical field of graphene materials, and specifically relates to a method for improving the dispersing performance of graphene. The method for improving the dispersing performance of graphene, provided by the invention, comprises the following steps: filtering a graphene / DMF mixture obtained through ultrasonic treatment of a N,N-dimethyl formamide solvent so as to obtain surface-functionalized graphene, dispersing the surface-functionalized graphene into deionized water through ultrasonic water bath, adding a surface active gent and vitamin C to obtain a mixed liquor, uniformly mixing the mixed liquor, carrying out centrifugalization, collecting upper liquid to obtain a dispersion liquid, putting the dispersion liquid into a three-mouth flask provided with aconstant flow pump, increasing the temperature to be 90 to 100 DEG C, adding hydrazine hydrate and vitamin C, carrying out a reaction for 1.5 to 3 h under constant speed magnetic stirring, and coolingto room temperature. According to the method for improving the dispersing performance of graphene, provided by the invention, the graphene can be uniformly dispersed in water, the method is high in dispersion efficiency and high in dispersion stability, and the requirement of industrial preparation can be met.

The invention discloses finishing liquor for silk towel cloth. The finishing liquor for silk towel cloth is prepared from the following components in parts by weight: 3.4 parts of coconut oil fatty acyl diethanol amine, 1.1 parts of ethyl formate, 2.3 parts of octadecyl trimethyl ammonium chloride, 1.8 parts of triethanolamine monooleate, 0.6 part of sodium polyacrylate and 1.7 parts of polyoxyethylene stearate. The finishing liquor for silk towel cloth disclosed by the invention is good in hydrophilicity and permeability and can be used for enhancing the bacterial resistance, the tensile resistance and the antifouling property of the towel cloth.

The invention discloses a preparation method of compound danshen root thin film coated tablets. The preparation method comprises the following steps: (1) performing raw material treatment, namely taking 450 parts by weight of danshen root, 141 parts by weight of panax notoginseng and 8 parts by weight of borneol, adding 95% ethanol into danshen root, performing ultrasonic wave extraction for 30 minutes, centrifuging, recycling ethanol from a filtrate, and concentrating to form a thick paste; adding 50% ethanol into medicine residues, performing ultrasonic wave extraction for 30 minutes, centrifuging, recycling ethanol from a filtrate, and concentrating to form a thick paste; and adding water into the medicine residues, performing ultrasonic wave extraction for 30 minutes, centrifuging, and concentrating a filtrate to form a thick paste; (2) tabletting, namely crushing panax notoginseng into fine powder, mixing with the thick pastes and auxiliary materials to prepare granules, drying, finely grinding borneol, uniformly mixing with the granules, and pressing to obtain compressed tablets; and (3) coating, namely putting the compressed tablets into a coating pan, and treating the compressed tablets by adopting a trundle pan coating process until coating liquid is completely sprayed, wherein the use amount of the coating liquid is 0.02-0.05 parts by weight, and the coating liquid consists of the following components in percentage by weight: 10-15% of sodium hydroxyethyl cellulose, 10-15% of a grosvener siraitia extract, 1-3% of microcrystalline cellulose, 0.1-0.5% of guar gum and the balance of purified water.

The invention discloses a protein-fouling-resistant zwitter-ion ultrafiltration membrane and a preparation method thereof. The zwitter-ion ultrafiltration membrane is prepared by coating gel, prepared through sol-gel reaction of zwitterionization chitosan and polyvinyl alcohol, on a supporter to form a membrane, and soaking the membrane into water for phase conversion reaction. The zwitter-ion ultrafiltration membrane prepared from the polyvinyl alcohol modified by the zwitterionization chitosan is highly resistant to water, remarkable in hydrophilicity and antifouling performance and good in antifouling selectivity and particularly achieves the ratio of removing bovine serum albumin up to 97.6%; the zwitter-ion ultrafiltration membrane capable of achieving targeted protein fouling resistance can maintain high membrane flux and high bovine serum albumin removal rate through multiple experiments and is long in service life; additionally, the zwitter-ion ultrafiltration membrane is simple in preparation technology, highly repeatable and easy to achieve scale production, requires no strict control over reaction conditions and the like.

A disclosed preparation method for a fabrics antibacterial finishing liquid comprises the following steps: 1) successively adding 1-2 parts by weight of glycerin monostearate, 1.4 parts by weight of sodium silicate, 0.8 part by weight of an acrylamide, 0.7 part by weight of potassium thiocyanate into 19 parts by mass ofdeionized water, and stirring uniformly; and 2) then simultaneously pouring 1.5 parts by weight of Ixeris denticulate extraction liquid, 2.3 parts by weight of sorbic acid, 1.1 parts by weight of dimetyl terephthalate, and 0.9 part by weight of boron phosphate, and continuing to stir until the mixture is uniformly mixed, so as to prepare the finishing liquid. The prepared finishing liquid is good in hydrophilicity and good in permeability, and fabrics finished by using the finishing liquid possesses excellent flame retardation performance, mildew resistance, moth prevention performance, bacteria resistance and static electricity resistance, and is strong in washing fastness and soft in handfeel.

The invention relates to a breathable symmetrical flexible all-solid-state super capacitor and a preparation method thereof. The super capacitor is prepared through the steps of (1) taking an oxidant and a dopant in deionized water to obtain a mixed solution A, then transferring to a culture dish containing pre-treated dust-free paper, and performing low temperature pretreatment; (2) dispersing pyrrole monomers in n-hexane, and performing low temperature pretreatment to obtain a mixed solution B; (3) adding the mixture B dropwise to the culture dish, and allowing static reaction; (4) taking out a reaction product, and washing and drying to obtain an electrode material; (5) immersing two pieces of the same electrode material into a gel electrolyte again, taking out the two pieces of electrode material respectively as positive and negative electrodes being in face to face placement, then coating the middle with a layer of gel electrolyte again, and drying to obtain the super capacitor. Compared with the prior art, the super capacitor of the invention has the characteristics of excellent electrochemical performance, good air permeability, flexible performance, simple operation, mass production and the like.

The invention discloses an alkyd prepolymer as well as a preparation method and application of the alkyd prepolymer. The invention discloses the alkyd prepolymer prepared from raw materials includingdicarboxyl sulfonate and small-molecular diol by an esterification reaction, and the alkyd prepolymer comprises compounds with three structural formulae. Meanwhile, the invention discloses a specificpreparation method of the alkyd prepolymer and an application of the alkyd prepolymer. The invention provides the alkyd prepolymer which has an anionic sulfonic group and a nonionic hydrophilic groupand is used for preparing waterborne polyurethane. The water-soluble raw material can be used for preparing hydroxyl type waterborne polyurethane resin, a waterborne polyurethane curing agent and a waterborne sealed polyurethane curing agent, and a product can have good water dispersibility, water solubility and storage stability by only small addition amount.

The invention discloses a preparation method of polylactic acid fiber / polyester fiber blended fabric with moisture absorbing and perspiration functions. The method comprises the steps that acrylic acid monomers are taken as modified monomers, and modified acrylic acid fiber is obtained by adopting an in-situ aggregation method; a layer of nano silica is condensed on the surface of the modified acrylic acid fiber; finally the fabric is obtained by covering the modified polylactic acid fiber with the polyester fiber and blended. The fabric prepared by means of the method has good moisture absorbing and permeability and is soft, comfortable, simple to prepare and low in cost.