含有Zwitterionic聚合物块的UCST型热敏Sol-Gel过渡triblock共聚物
Akifumi Kawamura1,2, Ryogo Takahashi1, Takashi Miyata1,2
1Department of Chemistry and Materials Engineering, Kansai University, Suita 564-8680, Osaka, Japan.
Gels (Basel, Switzerland)
|May 24, 2024
概括
研究人员开发了一种新型的triblock共聚合物,表现出高临界溶液温度 (UCST) 类型的热响应性sol-gel过渡. 这种智能生物材料显示出先进的药物输送系统和组织工程支架的前景.
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
- 生物医学工程 生物医学工程
背景情况:
- 热敏聚合物对于生物医学应用,如药物输送和组织工程至关重要.
- 大多数研究重点是低临界溶液温度 (LCST) 聚合物,对高临界溶液温度 (UCST) 聚合物的探索有限.
- 设计UCST型聚合物对于开发新型智能生物材料至关重要.
研究的目的:
- 设计和合成具有UCST型热敏性质的ABA型triblock共聚物.
- 为了研究新型zwiterionic聚合物的sol-gel过渡行为.
- 探索这些聚合物作为智能生物材料平台的潜力.
主要方法:
- 合成的多硫乙烯-多乙烯-多硫乙烯 (PSB-PEG-PSB) 和多硫乙烯-多乙烯-多硫乙烯 (PSaB-PEG-PSaB) 三块共聚合物,采用可逆添加-碎片化链转移 (RAFT) 聚合.
- 研究了在水溶液和酸盐缓冲盐溶液 (PBS) 中合成的共聚合物的热敏相过渡和sol-gel行为.
- 分析了硫贝 (SB) 和硫贝 (SaB) 单体之间的结构和相互作用差异.
主要成果:
- PSB-PEG-PSB共聚合物在冷却时显示粘度增加,但没有从溶液到凝的过渡.
- 在PBS中从80°C降温到25°C时,PSaB-PEG-PSaB共聚合物表现出明显的UCST类型的sol-to-gel过渡.
- 在PSaB块中的硫酸盐 (-OSO3) 组促进了更强的分子间双极-双极相互作用,导致凝网络的形成.
结论:
- 该PSaB-PEG-PSaBtriblock共聚合物表现出一种独特的UCST类型的热响应性sol-gel过渡.
- 增强的PSaB块的分子间相互作用是形成凝网络的关键.
- 这种共聚物为开发用于药物输送和组织工程的先进智能生物材料提供了一个有前途的平台.
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