摘要
在聚氨酯溶液湿法成膜的过程中引发前驱体的原位水解缩聚反应,成功地将纳米级TiO_2颗粒均匀地引入聚氨酯合成革涂层中。低温氮吸附/脱附试验证明,在有机聚氨酯和无机纳米TiO_2颗粒间形成了相间孔隙,这使得本试验所制备的聚氨酯/纳米TiO_2原位杂化涂层具有明显提高的透气、透湿性。
As polyurethane solution coagulated in wet phase inversion process, in - situ hydrolysis and condensation reactions of nano precursor were triggered synchronously to introduce nano - TiO2 into polyurethane synthetic leather coating. Water vapor and gas permeability of the hybrid coatings are found to increase with an increasing concentration of nano - TiO2 , which is explained as voids formed at organic polymer - inorganic nano particle interface. The existence of such voids was proved in nitrogen adsorption/desorption experiment, by the determination of extra mesopores and higher specific surface area than predicted values.
出处
《中国皮革》
CAS
北大核心
2009年第15期11-15,共5页
China Leather
基金
浙江省重大科技专项课题资助项目(2007C11100)
国家863项目资助(2007AA03Z341)
关键词
聚氨酯
纳米TIO2
原位杂化
透气透湿
合成革
polyurethanes
nano- TiO2
in- situ hybrid
water vapor/gas permeability
synthetic leather
