Method for preparing chitosan reinforced bars

[0016] Weigh 0.06g of short polylactic acid fibers (2mm) and add them to 100mL of 2% (v / v) acetic acid solution and stir to disperse the fibers. Add 3g of chitosan powder to the solution, stir evenly, and let stand for defoaming. Take a small amount of chitosan solution and inject it into the mold, first form an inner film in 3% (w / v) sodium hydroxide coagulation solution, then fill the mold with the solution, then put it into the sodium hydroxide coagulation solution and remove the mold . After 20 hours, soak the chitosan gel rod in distilled water until it becomes neutral, and dry it in a vacuum oven at 30°C to obtain a transparent, slightly yellow polylactic acid short fiber-reinforced chitosan rod. Test the flexural strength and flexural modulus of chitosan rods, the results are shown in Table 1.

[0018] Weigh 1.20g of short polylactic acid fibers (23mm) and add them to 100mL of 2% (v / v) acetic acid solution and stir to disperse the fibers. Put 6g of chitosan powder into the solution, stir evenly, and let stand for defoaming. Take a small amount of chitosan solution and inject it into the mold, first form an inner film in 10% (w / v) sodium hydroxide coagulation solution, then fill the mold with the solution, then put it into the sodium hydroxide coagulation solution and remove the mold . After 8 hours, put the chitosan gel rod into distilled water and soak until it becomes neutral, and put it into a vacuum oven at 80° C. for drying to obtain a polylactic acid short fiber-reinforced chitosan rod. The flexural strength and flexural modulus are listed in Table 1.

[0020] Weigh 0.12g of short polylactic acid fibers (2mm) and add them to 100mL of 2% (v / v) acetic acid solution and stir to disperse the fibers. Put 6g of chitosan powder into the solution, stir evenly, and let stand for defoaming. Take a small amount of chitosan solution and inject it into the mold, first form an inner film in 10% (w / v) sodium hydroxide coagulation solution, then fill the mold with the solution, then put it into the sodium hydroxide coagulation solution and remove the mold . After 8 hours, put the chitosan gel rod into distilled water and soak until neutral, then put it into a vacuum oven at 60°C and dry it to obtain the polylactic acid short fiber reinforced chitosan rod. The flexural strength and flexural modulus are listed in Table 1.