中国塑料 ›› 2024, Vol. 38 ›› Issue (4): 19-25.DOI: 10.19491/j.issn.1001-9278.2024.04.004

• 材料与性能 • 上一篇    下一篇

聚乳酸基水性聚氨酯的制备及其在合成革中的应用研究

沈丹彤1, 薛雨亭1, 李荣杰2, 徐芳1(), 翁云宣1()   

  1. 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
  • 收稿日期:2023-09-05 出版日期:2024-04-26 发布日期:2024-04-22
  • 通讯作者: 徐芳(1991—),女,副研究员,从事可降解高分子材料等研究工作,xufang@btbu.edu.cn
    翁云宣(1972—),男,教授,从事生物基材料及环境友好高分子材料等研究工作,wyxuan@th.btbu.edu.cn
    E-mail:xufang@btbu.edu.cn;wyxuan@th.btbu.edu.cn
  • 基金资助:
    国家重点研发计划(2021YFB3801902)

Study on preparation of poly(lactic acid)⁃based waterborne polyurethane and its application in synthetic leathers

SHEN Dantong1, XUE Yuting1, LI Rongjie2, XU Fang1(), WENG Yunxuan1()   

  1. 1.College of Light Industry Science and Engineering, Beijing Technology and Business University, Beijing 100048 China
    2.Anhui Fengyuan Biotechnology Co, Ltd, Bengbu 233700, China
  • Received:2023-09-05 Online:2024-04-26 Published:2024-04-22
  • Contact: XU Fang, WENG Yunxuan E-mail:xufang@btbu.edu.cn;wyxuan@th.btbu.edu.cn

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 °。

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

Abstract:

Poly(lactic acid) (PLA)⁃based waterborne polyurethane (WPU) was synthesized using PLA⁃OH and hexamethylene 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 synthetic 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 %.

Key words: waterborne polyurethane, poly(lactic acid diol), hydrophilic chain extender, microfiber synthetic leather

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