由可见光光启动调节的CuAAC-甲酸相互透的聚合物网络 (IPN) 特性
Mukund Kabra1, Christopher J Kloxin1,2
1Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA.
概括
控制光强度允许精确调整相互透的聚合物网络 (IPN) 的形成. 这使得用于先进应用的材料特性和形态学的操纵成为可能.
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:
- 相互透的聚合物网络 (IPN) 通过结合不同的聚合物网络来提供独特的特性.
- IPN形成动力学极大地影响材料形态和最终特性.
- 控制聚合序列是定制IPN特征的关键.
研究的目的:
- 调查光启动光强度对IPN形成和特性的影响.
- 为了证明控制IPN微观结构的双光启动.
- 建立一个易于IPN设计和合成的方法.
主要方法:
- 利用铜催化酸 (CuAAC) 的双光启动和激进甲酸盐聚合.
- 聚合聚乙烯甘单体和四乙烯甘二甲酸盐 (TEGDMA) 在一个中.
- 通过热力学分析和AFM使用光强度 (0.2mW/cm2到20mW/cm2) 的函数来评估IPN属性.
主要成果:
- 观察到IPN的形态差异与光强度相关.
- 证明TEGDMA首先在中等强度 (20mW/cm2) 的凝中形成了支架.
- 表明CuAAC聚合可以首先在低强度 (0.2 mW/cm2) 发生凝,从而改变IPN轨迹.
结论:
- 光强度为IPN形成提供了空间,时间和动力控制.
- 凝的序列 (同时或顺序) 可以切换,控制相位分离.
- 这种方法为设计和合成具有可调节热力学特性的IPN提供了一个简单的途径.
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