开发新型卡达诺衍生反应分散剂,用于生物基无离子-无离子水性聚氨
Jianrong Xia1, Haobin Wu2, Kaidong Chen2
1Fujian Engineering and Research Center of New Chinese Lacquer Materials, Minjiang University, Fuzhou 350108, China.
Polymers
|November 9, 2024
概括
这项研究介绍了一种新的生物基链延长剂,硫化卡达基聚乙烯甘醇 (SCP),用于高性能水borne聚氨分散剂 (WPUDs). SCP增强了UV可固化的涂层,提高了机械,防水和热性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续化学 可持续化学
背景情况:
- 开发高性能水性聚氨分散剂 (WPUDs) 对环保涂料至关重要.
- 现有的链条延长器通常依赖于不可再生资源,可能缺乏高级功能.
- 需要可持续的功能性添加剂来增强WPUD的性能,特别是在UV可固化的应用中.
研究的目的:
- 为了合成和表征一种新的生物基,可光疗,阳离子-非阳离子双功能的链延长剂,硫化卡达诺基基聚乙烯糖醇 (SCP).
- 研究使用SCP制备WPUD,并评估SCP对分散性质和薄膜形成的影响.
- 评估WPUD涂料在UV照射后的性能提升,重点关注机械强度,耐水性和热稳定性.
主要方法:
- SCP是由可再生卡达和聚乙烯糖醇合成的.
- 通过使用聚乙烯酸盐 (PBA),异二酸盐 (IPDI),乙烯二胺 (EDA) 和SCP的乙过程来制备WPUD.
- 研究了聚乙烯甘醇分子量和SCP剂量的影响;测量了颗粒大小,稳定性,薄膜特性,抗拉强度,吸水率 (WAR),水蒸气传导率 (WVTR) 和热稳定性.
主要成果:
- 最佳的分散稳定性和薄膜形成特性是在聚乙烯甘醇分子量为1500和PBA与SCP摩尔比为4:1的情况下实现的,导致粒子大小为0.326±0.010μm和六个月的存储稳定性.
- 紫外线照射显著增加了拉伸强度从11.4 MPa到16.8 MPa,这是由于半互穿透网络的形成.
- 紫外线交联显著改善了耐水性 (WAR从18.68%降至4.21%;WVTR从6.59 × 10−5降至2.26 × 10−5 g·m−1·Pa−1·d−1) 和热稳定性.
结论:
- SCP是一种高效的,生物基的,可光疗的WPUD双功能链延长器.
- 通过UV交叉连接,SCP可以开发具有增强机械性能,优越耐水性和更好的热稳定性的高性能WPU涂层.
- 这项研究为从可再生资源中获得的先进功能性涂料提供了一个可持续的途径.
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