Page 122 - 《精细化工》2021年第11期

第 38 卷第 11 期 精 细 化 工 Vol.38, No.11
2021 年 11 月 FINE CHEMICALS Nov. 2021

功能材料
不同硅氧烷改性水性聚氨酯胶膜的性能

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梁旭阳 ，赵 宇 ，何雪飞 ，宝冬梅 ，龙丽娟 ，周国永
（1. 贵州民族大学 化学工程学院，贵州 贵阳 550025；2. 贵州省材料产业技术研究院，贵州 贵阳 550014）
摘要：以二苯基硅二醇（DPSD）、聚二甲基硅氧烷（PDMS 和 KF-2201）对水性聚氨酯（WPU）进行化学改性
以改善 WPU 耐水性和耐热性的不足，并探究 3 种改性剂对 WPU 胶膜耐水性和耐热性的影响。利用 DLS 对乳
液粒径分布进行测试，采用 FTIR、XPS、DSC、TG、DTG、SEM、AFM 对胶膜进行表征。未改性胶膜、DPSD、
PDMS 以及 KF-2201 改性胶膜的水接触角分别为 81.08°、96.37°、105.72°、110.05°，吸水率分别为 16.41%、12.70%、
10.19%、9.12%，热失重 95%时相应胶膜的温度分别为 367、375、394、401 ℃，对应胶膜的粗糙度分别为 1.81、
3.67、5.06、17.7 nm。结果表明，硅氧烷的引入提升了胶膜的耐水性和耐热性，而含有大量 Si—O—Si 键和疏水
苯环的 KF-2201 更有助于提升胶膜的耐水性和耐热性。此外，胶膜表面的纹路排列较为精细规整，并且胶膜软
硬段存在微相分离。
关键词：水性聚氨酯；硅氧烷；改性；耐水性；耐热性；功能材料
中图分类号：TQ323.8；TQ630.1 文献标识码：A
文章编号：1003-5214 (2021) 11-2268-09 开放科学 (资源服务) 标识码 (OSID)：

Properties of different siloxane modified waterborne polyurethane latex films

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LIANG Xuyang , ZHAO Yu , HE Xuefei , BAO Dongmei , LONG Lijuan , ZHOU Guoyong
（1. School of Chemical Engineering, Guizhou Minzu University, Guiyang 550025, Guizhou, China; 2. Guizhou
Material Industrial Technology Institute, Guiyang 550014, Guizhou, China）
Abstract: In order to improve the water resistance and heat resistance of waterborne polyurethane (WPU),
WPU was chemically modified by diphenylsiliconediol (DPSD) and polydimethylsiloxane (PDMS and
KF-2201), respectively. The effects of three modifiers on the water resistance and heat resistance of WPU
films were investigated. The particle size distribution of the emulsion was tested by DLS. The latex films
were characterized by FTIR, XPS, DSC, TG, DTG, SEM and AFM. The water contact angles of unmodified
WPU latex film, DPSD, PDMS and KF-2201 modified latex films were 81.08°, 96.37°, 105.72°, 110.05°,
respectively, and the corresponding water absorption rates were 16.41%, 12.70%, 10.19%, 9.12%. The
temperatures of the above-mentioned corresponding latex films were 367, 375, 394 and 401 ℃ when the
thermal mass loss was 95%. The latex films had roughness of 1.81, 3.67, 5.06 and 17.7 nm, respectively.
The results showed that the introduction of siloxane improved the water resistance and heat resistance of the
latex film. Especially, KF-2201 containing a large number of Si—O—Si bonds and hydrophobic benzene
rings was more helpful to improve the water resistance and heat resistance of films. In addition, the wrinkle
on the surface of film was fine and regular, and there was microphase separation in the hard and soft
sections of the film.
Key words: waterborne polyurethane; siloxane; modified; water resistance; heat resistance; functional materials

近几十年来，水性聚氨酯（WPU）从源头上有 易挥发性有机物污染环境的难题 [1-2] ，其绿色环保的
效地解决了传统有机溶剂含有苯类、酯类和醛类等 特点是涂料、弹性体、胶黏剂等领域重要的发展方

收稿日期：2021-05-31; 定用日期：2021-07-20; DOI: 10.13550/j.jxhg.20210550
基金项目：国家自然科学基金（51863004）；贵州省科技计划项目（黔科合基础[2019]1156 号）；贵州省科学技术基金（黔科合基础
[2020]1Y211 号）
作者简介：梁旭阳（1995—），男，硕士生，E-mail：240844073@qq.com。联系人：周国永（1978—），男，副教授，E-mail：gyzhou@gzmu.edu.cn。