摘要
以聚乳酸二元醇(PLA⁃OH)和六亚甲基二异氰酸酯(HDI)为原料,2,2⁃二羟甲基丁酸(DMBA)为亲水扩链剂合成了亲水扩链剂含量不同的聚乳酸(PLA)基水性聚氨酯(PLA⁃WPU)乳液,制备了PLA⁃WPU胶膜和超细纤维合成革。结果表明,随DMBA含量的增加,PLA⁃WPU乳液粒径减小、固含量增大,PLA⁃WPU超细纤维合成革拉伸强度和最大负荷增大,水接触角减小。当DMBA含量为5.5%时,PLA⁃WPU乳液固含量达到35.4%,粒径为196.37 nm,PLA⁃WPU超细纤维合成革的拉伸强度提高到29.9 MPa,约为超细纤维基布的1.7倍,水接触角降低到73°。
Poly(lactic acid)(PLA)⁃based waterborne polyurethane(WPU)was synthesized using PLA⁃OH and hexa⁃methylene diisocyanate as raw materials with different contents of 2,2⁃dimethylolbutyric acid(DMBA)as a hydrophilic chain extender.Then,the PLA⁃WPU adhesive film and ultrafine fiber synthetic leathers were prepared.The particle size of the PLA⁃WPU lotion decreased with an increase in the DMBA content,and however,its solid content increased.The resultant PLA⁃WPU superfine fiber synthetic leather also obtained an increase in the tensile strength and maximum load but a decrease in the water contact angle.The solid content of the PLA⁃WPU lotion containing 5.5 wt%DMBA reached 35.4%,and its particle size was 196.37 nm.In this case,the tensile strength of PLA⁃WPU superfine fiber syn⁃thetic leather was 29.9 MPa,which was as about 1.7 times as that of the superfine fiber substrate.In addition,the water contact angle of the PLA⁃WPU superfine fiber synthetic leather decreased to 73°when the DMBA content increased to 5.5%.
作者
沈丹彤
薛雨亭
李荣杰
徐芳
翁云宣
SHEN Dantong;XUE Yuting;LI Rongjie;XU Fang;WENG Yunxuan(College of Light Industry Science and Engineering,Beijing Technology and Business University,Beijing 100048 China;Anhui Fengyuan Biotechnology Co,Ltd,Bengbu 233700,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2024年第4期19-25,共7页
China Plastics
基金
国家重点研发计划(2021YFB3801902、2021YFB3801905)。
关键词
水性聚氨酯
聚乳酸二元醇
亲水扩链剂
超细纤维合成革
waterborne polyurethane
poly(lactic acid diol)
hydrophilic chain extender
microfiber synthetic leather
