蚕丝粉体改性聚氨酯合成革后的吸透湿性与力学性能分析

Absorbing Moisture Permeability and Mechanical Properties Analyzeing of Polyurethane Synthetic Leather Modified by Silk Powder

主要通过自制的蚕丝粉体对聚氨酯进行改性试验,测试其吸透湿性能有很大改善,当粉体含量超过10%时,粉体含量的增加成为吸水性与透湿性提高的主导因素,对合成革吸透湿性能发挥作用较大,使合成革能获得优良的吸透湿性能。但粉体含量为30%时,合成革的断裂强力为12N,初始模量为0.29N/mm,显示力学性能差,这是产品生产中应注意的问题。SEM电镜显示,粉体颗粒加入对合成革内部致密蜂窝结构的破坏加强,同时合成革内部空洞也越来越多,引起强力下降。该研究可提示企业正确改进聚氨酯合成革,从而在一定条件下发挥合成革改性的优势,综合提高合成革产品质量。

The polyurethane was modified by homemade silk powder. The moisture - absorbing performance is improved signif- icantly. When powder content is increased more than 10%, the powder content becomes the main factors afecting water absorption and water vapor permeability, playing an important role in improving breathable performance and moisture absorption properties. While when powder content is added to 30%, the breaking strength of synthetic leather is 12N, the initial modulus is O. 29N/ram, with poor mechanical properties. This is the problems needing more attention in production. SEM electronic microscope shows that powder particles ware joined to strengthen the destruction of synthetic leather interior of dense cellular structure. At the same time, more and more synthetic leather hole causes strength decline. The study could prompt the enterprises to improve polyure- thane synthetic leather better, which under certain conditions, take advantage of the synthetic leather modification, improving leather quality.