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通过红色和近红外光驱动的强大的迷你乳液PhotoATRP

Xiaolei Hu¹, Rongguan Yin¹, Jaepil Jeong¹

¹Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.

Journal of the American Chemical Society

|May 1, 2024

概括

这项研究引入了使用红色或近红外光和甲基蓝色的高效光诱导小型乳液原子转移基聚合 (ATRP). 这种更绿色的方法在分散的介质中实现了快速,可控的聚合,即使是在大规模.

科学领域:

聚合物化学
摄影化学
材料科学

背景情况:

光诱导聚合提供了温和的条件和控制,但以前的乳液方法使用波长短的光,透度有限.
这限制了异质系统的效率和控制,阻碍了实际应用.

研究的目的:

开发一种高效的光诱导小型乳液原子转移激素聚合 (ATRP) 工艺.
用可见光 (红色) 或近红外光 (NIR) 在露天聚合.
通过使用更长波长的光来证明改进的控制和可扩展性.

主要方法:

使用甲基蓝 (MB+) 作为红色/NIR光驱动ATRP的水溶性光催化剂.
通过使用水溶性电子捐赠器,通过ATRP脱活性剂启动聚合.
在小型乳液系统中进行聚合,测试各种反应器大小和250毫升级反应.

主要成果:

通过使用红色/NIR光在露天中实现高效的光诱导微乳液ATRP.
合成的聚合物分散度低 (1.09 ≤ Đ ≤ 1.29) 并且在一小时内进行定量转换.
证明了NIR光透在分散介质中大规模聚合的优势.

结论:

这项工作提供了首个有效的红色/NIR光驱动微乳液ATRP的例子.
使用MB+和更长波长的光可以实现更绿色,更实用,更可扩展的乳液光聚合.
这些发现为分散系统中的受控聚合开辟了新的途径, 提高了效率和控制.

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