阳离子两亲性共聚物在有机鞣革复鞣中的应用OA北大核心CSTPCD

Cationic amphiphilic copolymer(PSD)was synthesized by free radical polymerization reaction and then was applied in the retanning of TWS organic tanned leather.Dynamic light scattering and diffusing wave spectroscopy showed that the aggregation degree of PSD in water increased with the increased pH,the decreased temperature and the increased concentration.Therefore,the retanning of organic tanned leather with PSD was carried out at pH 4 and 40 ℃.PSD could penetrate into the hierarchy of collagen fibrils of the organic tanned leather and form a hydrophobic film,which remarkably improved the hydrophobicity of the crust leather.The penetration time of water increased from 0.14 min to 10-20 min in dynamic waterproofness determination.In addition,PSD promoted the absorption of anionic fatliquor by the organic tanned leather,with the absorption rate increasing from 88.5％to 93.7％.The hydrophobicity and the thickening rate of the crust leather were enhanced,while the softness decreased as the dosage of PSD increased.In summary,the application of cationic amphiphilic copolymers in retanning of organic tanned leather can improve the comprehensive performance of the finished leather,which contributes to developing the chrome-free organic tanning system and producing high-performance metal-free eco-leather.