温度对蚕丝结构及性能的影响

Effect of the temperature on structure and properties of silk

文章论述了温度对蚕丝纤维结构及性能的影响现状,表明:对蚕丝进行高温热处理,纤维中β-折叠结构的相对含量下降,而α-螺旋和无规线团结构有上升趋势,高温对纤维原纤间超分子结构影响较大,在纤维表面形成明显的条纹和沟槽结构,黄变指数增大,强力和伸长率有所下降。经低温冷冻处理后,鲜茧中水分子结晶膨胀,使得蚕丝间丝胶的黏合性能减弱,蚕茧解舒率提高,冷冻处理后在纤维表面出现微孔结构,使纤维表面活性增大,吸湿、抗菌能力提高,对丝织物进行冷冻处理,织物的透气性明显提高,但强力随处理时间的延长有下降趋势。

It reported that the temperature influence on the structure and properties of silk fibers at present situation. With the treatment in the high temperature for silk fiber, 13-sheet structure relative content decreased, while the a-helix and random coil structure had a tendency to rise, high temperature had great influence on fiber inter-fibrillar supramolecular structure, formed apparent stripes and groove structure on the fiber surface, yellow index increased, strength and elongation percentage decreased. With the low temperature freezing treatment, the water molecules of crystallization in fresh cocoon, made the bonding performance between the silk sericin become weaken, Cocoon reelability percentage increased, appeared microporous structure on the fiber surface after freezing, so that it made the fiber surface activity increase, the moisture absorption and antibacterial ability increase. With treatment for silk fabrics in the freezing, the permeability of the fabric was increased obviously, but the strength had a downward trend along with the time prolonged.