在RAFT种子乳液聚合过程中增强体稳定性
Zongying Hu1, Ruilong Zhang1, Hanying Zhao1
1Key Laboratory of Functional Polymer Materials, Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China.
Langmuir : the ACS journal of surfaces and colloids
|October 3, 2025
概括
这项研究提高了可逆添加-碎片化链转移 (RAFT) 乳液聚合物的颗粒稳定性. 在种子颗粒上移植Zwitterionic聚合物块,提高乳的稳定性,并使新的材料特性成为可能.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 可逆添加碎片化链转移 (RAFT) 乳液聚合是粒子设计的关键.
- 在RAFT乳液聚合过程中的一个挑战是,随着颗粒的生长,保持颗粒稳定性.
- 在不断增长的乳颗粒上降低稳定剂密度会导致聚合.
研究的目的:
- 使用RAFT在种子乳液聚合过程中提高颗粒稳定性.
- 为了合成具有可移植功能的核心外种子颗粒.
- 为了研究zwitterionic聚合物块在粒子表面上的特性.
主要方法:
- 通过RAFT乳液聚合,制备聚甲基酸) 核心和聚甲基酸) 贝种子粒子.
- 用电子转移原子转移基聚合物生成的激活剂将zwitterionic poly(3-dimethyl(methacryloyloxyethyl) -ammonium propanesulfonate) 块移植到种子颗粒上.
- 随后的RAFT用功能化的种子颗粒对n-丁烯酸盐进行种子乳液聚合.
主要成果:
- 在种子聚合过程中表现出增强的粒子稳定性.
- 通过移植的zwitterionic聚合物块成功合成了核心外颗粒.
- 研究了zwitterionic块的高临界溶液温度 (UCST) 行为和盐反应.
结论:
- 将zwitterionic块移植到RAFT合成的种子颗粒上,显著提高了乳的稳定性.
- 功能化的粒子表现出可调节的特性,如UCST行为和盐的反应性.
- 这种方法为乳液聚合过程中的高级粒子设计提供了一个有希望的策略.
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