改性酪蛋白/羧甲基纤维素钠共混纤维制备与性能

采用湿法纺丝,以乙醇、氯化钙和盐酸的混合溶液为凝固浴制备了改性酪蛋白(CLC)/羧甲基纤维素钠(CMC-Na)共混纤维。通过测试纺丝液流动性以及纤维的红外光谱、表面形态和力学性能,研究了CLC和CMC-Na不同配比与纺丝溶液pH改性后酪蛋白纤维的力学性能增加,纺丝溶液的流动性与CMC-Na维的红外光谱分析表明CLC与CMC-Na之间有良好的相互作用。CMC-Na质量分数为30%(相对于改性酪蛋白)的共混纤维性能较好,纤维表面较致密,有沿着纤维轴向取向的明显条纹,其断裂强度为341.19MPa。

Preparation and Properties of Modified Casein Blended with Sodium Carboxymethyl Cellulose

The blend fiber of modified casein and sodium carboxymethyl cellulose was prepared by wet spinning with ethanol, calcium chloride and hydrochloric acid as coagulation bath. The effects of different ratios of modified casein and sodium carboxymethyl cellulose and pH value of spinning solution on the molecular structure, surface morphology and mechanical properties of the fibers were studied by measuring the fluidity of spinning solution, infrared spectroscopy, surface morphology and mechanical properties of the fibers. The results show that the mechanical properties of casein fibers increase after modification. The fluidity of the spinning solution is directly proportional to the content of sodium carboxymethyl cellulose,and is inversely proportional to pH value of spinning solution. Infrared spectrum analysis shows that there is a good interaction between modified casein and sodium carboxymethyl cellulose. The blend fiber with 30%CMC-Na(relative to modified casein) has better properties, the surface of the blend fiber is denser with obvious stripes along the fiber axis, and the breaking strength is 341.19 MPa.