BaTiO3 催化超声波驱动的压电诱导的可逆添加碎片链转移聚合在水性介质中的聚合
Yu Zhang1, Junle Zhang2, Shuo Xu1
1Henan Joint International Research Laboratory of Living Polymerizations and Functional Nanomaterials, Henan Key Laboratory of Advanced Nylon Materials and Application, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China.
Macromolecular rapid communications
|May 14, 2024
概括
超声波启动可逆添加-碎片化链转移聚合 (RAFT) 使用在水中的压电酸纳米颗粒. 这种压力RAFT方法使得用于应力传感器的聚合物和压电水凝的受控合成成为可能.
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:
- 超声波比光或热提供更深的组织透和较低的散射,使它们适合非侵入性刺激.
- 可逆添加碎片化链转移聚合 (RAFT) 是一种控制的聚合技术,通常在水性介质中进行.
研究的目的:
- 在水性介质中开发一种新的超声波驱动的压电诱导RAFT聚合 (Piezo-RAFT).
- 调查涉及压电酸 (BTO) 纳米粒子和基基生成的启动机制.
- 探索用于潜在应力传感器应用的压电水凝的制备.
主要方法:
- 使用商业超声波洗浴 (40 kHz) 带有压电四边形BaTiO3 (BTO) 纳米粒子启动RAFT在水中的聚合.
- 在超声波作用下研究了BTO的电子转移,以分解水并产生基基 (HO•) 以启动聚合.
- 进行了"开启和关闭"实验和链延伸,以证明时间控制和聚合物链的忠实性.
主要成果:
- 实现可控制和活形RAFT聚合,具有线性摩尔质量增加和狭窄的摩尔质量分布 (Mw/Mn < 1.20).
- 在聚合过程中表现出极好的时间控制.
- 通过链延长实验证实了合成聚合物的高链保真性.
- 通过使用开发的方法,成功制备了压电式水凝.
结论:
- 从BTO纳米颗粒中超声波诱导的电子转移有效地在水性介质 (piezo-RAFT) 中启动RAFT聚合.
- 压缩RAFT工艺提供了对聚合物的精确控制,产生高保真度的聚合物.
- 开发的方法适用于制造压电水凝,在应力传感中具有潜在的应用.
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