湿/热处理对狗绒纤维结构和性能的影响

Influence of wet/heat treatment on structure and properties of dog hair

为更好地开发利用狗绒资源,探究了湿/热处理对狗绒纤维结构和性能的影响,分别对狗绒纤维进行湿处理和热处理,采用单纤维万能测试仪、红外光谱仪、X射线衍射仪、热分析仪、保暖测试仪和扫描电子显微镜等对狗绒纤维进行测试。结果表明:狗绒纤维经湿处理后卷曲率下降,经热处理后卷曲率呈上升趋势;热处理对狗绒纤维表面损伤程度明显高于湿处理,且热处理后狗绒纤维力学性能明显变差;狗绒纤维具有蛋白质纤维红外特征,湿处理和热处理对其分子结构无明显影响,但对其二级结构造成影响,结晶指数由未处理时56. 87%,分别降低为46. 21%和45. 92%,并且热稳定性均有下降;狗绒纤维经湿处理后中空率下降,保暖率也随之下降,经热处理后纤维中空率增加,保暖率提高至96. 88%。

In order to better develop and utilize the resources of dog hair,the influences of wet/heat treatment on the structure and properties of dog hair were studied.The dog hair were subjected to heat and wet treatment,respectively,then the fibers were tested by single fiber universal tester,Fourier transform infrared spectroscopy,X-ray diffraction,thermal analyzer,thermal insulation tester and scanning electron microscopy.The results show that the crimp ratio of dog hair decreases after wet treatment,while that of the fiber increases after heat treatment.Heat treatment has much heavier harm to the surface of that fiber than wet treatment,and the mechanical properties of the dog hair are significantly worse after heat treatment.The dog hair has the infrared characteristics of protein fiber,and both of the wet treatment and heat treatment have no obvious influence on its molecular structure,but the secondary structure is affected.The crystallization indexes of samples after wet treatment and heat treatment decrease from 56.87% of untreated sample to 46.21% and 45.92%,respectively,and the heat stability decreases.In addition,the hollow ratio of the wet treated dog hair is decreased obviously and the warm retention ratio is reduced accordingly.However,the hollow ratio of the fibers after heat treatment increases,and the warm retention ratio increases to 96.88%.