在非导体基板上经过电化学介导的原子转移激素聚合:通过催化剂扩散控制的刷子生长
Bin Li1, Bo Yu, Wilhelm T S Huck
1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000 China.
Journal of the American Chemical Society
|January 25, 2013
概括
表面启动的原子转移基聚合 (SI-ATRP) 使用Cu(I) / L激活器梯度来控制聚合物生长. 通过控制可调节的聚合物动力学间隙距离和基板角度来移植聚合物刷.
科学领域:
- 聚合物化学 聚合物化学
- 表面科学是一门学科.
- 电化学 电化学 电化学
背景情况:
- 原子转移基聚合 (ATRP) 是一种受控聚合技术.
- 表面启动的ATRP (SI-ATRP) 允许从表面上进行聚合物接种.
- 控制聚合动力学对于定制材料特性至关重要.
研究的目的:
- 为了研究由电化学激活剂梯度触发的表面启动原子转移激素聚合 (SI-ATRP).
- 探索激活剂度梯度对聚合物生长动态的影响.
- 为了实现具有可调节性质的渐变聚合物刷.
主要方法:
- 在工作电极上生成一个Cu (I) /L激活器.
- 在定义的间隙中通过离子扩散形成稳定的[Cu(II) L]/[Cu(I) L]比度梯度.
- 在不同的间隙距离和倾斜角度上将聚合物刷植在启动器终端基板上.
主要成果:
- 通过扩散电化学生成的激活器,SI-ATRP成功启动了.
- 铜催化剂 ([Cu(II) L]/[Cu(I) L]) 的稳定度梯度得到确定.
- 聚合物生长动力学是由间隙距离决定的,从而可以控制聚合物链的长度和密度.
- 渐变聚合物刷是通过将基板沿着既定的渐变位置来合成的.
结论:
- 激活器梯度的电化学生成为控制SI-ATRP提供了一种新的方法.
- 间隙距离和基板方向是调整聚合物刷架构的关键参数.
- 这种方法可以创建具有空间控制的聚合物特性的材料.
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