聚乳酸基水性聚氨酯的制备及其在合成革中的应用研究
Study on preparation of poly(lactic acid)-based waterborne polyurethane and its application in synthetic leathers
沈丹彤 1薛雨亭 1李荣杰 2徐芳 1翁云宣1
作者信息
- 1. 北京工商大学轻工科学与工程学院,北京 100048
- 2. 安徽丰原生物技术股份有限公司,安徽 蚌埠 233700
- 折叠
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 °.
Abstract
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%.
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Key words
waterborne polyurethane/poly(lactic acid diol)/hydrophilic chain extender/microfiber synthetic leather引用本文复制引用
基金项目
国家重点研发计划(2021YFB3801902)
国家重点研发计划(2021YFB3801905)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据