UV‐Free Microfluidic Particle Fabrication at Low Temperature Using ARGET‐ATRP as the Initiator System

UV‐Free Microfluidic Particle Fabrication at Low Temperature Using ARGET‐ATRP as the Initiator System
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使用 ARGETâATRP 作为引发剂系统在低温下制造无紫外线微流控颗粒

DOI:
10.1002/mren.201600015
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发表时间:
2016
影响因子:
1.5
通讯作者:
Rudolf Zentel
Rudolf Zentel
中科院分区:
工程技术4区
文献类型:
--
作者:
Lukas B. Braun;Tristan Hessberger;Christophe A. Serra;Rudolf Zentel

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本文描述了一种在微流体装置中制造单分散聚合物颗粒的新方法,该装置无需紫外光,也无需高温。通过在共毛细管微流体设置中应用通过电子转移-原子转移自由基聚合(ARGET-ATRP)引发剂系统的活化剂再生,并通过将单体混合物分离为引发剂相和催化剂相,可以实现液滴在低温下的快速聚合,而不会过早固化并因此堵塞毛细管。考察了流速对聚合物粒径及其多分散性的影响以及聚合反应的可控性。颗粒尺寸可很好地调节,但由于快速聚合所需的高自由基浓度,反应不受控制。此外,还在低温下生产了含有UV染料的颗粒,作为概念验证。
A new way to fabricate monodisperse polymer particles in a microfluidic device without UV‐light and without the need for high temperatures is described in this article. By applying an activator regeneration by electron transfer ‐ atom transfer radical polymerization (ARGET‐ATRP) initiator system in a co‐capillary microfluidic setup and by separating the monomer mixture in an initiator and a catalyst phase, a fast polymerization of the droplets at low temperature without premature curing and thus clogging of the capillaries can be achieved. The influence of the flow rates on the particle sizes and their polydispersity as well as the controlled character of the polymerization are investigated. The particle size is well adjustable, but the reaction is not controlled due to the high radical concentration needed for rapid polymerization. In addition, particles with incorporated UV‐dyes are produced as a proof of concept at low temperature.
水分散介质中的原子转移自由基聚合
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