通过 α-氰基丙烯酸乙酯的快速界面聚合实现自稳定封装：从乳液到微胶囊分散体,Macromolecules

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通过 α-氰基丙烯酸乙酯的快速界面聚合实现自稳定封装：从乳液到微胶囊分散体
Macromolecules ( IF 5.1 ) Pub Date : 2021-11-14 , DOI: 10.1021/acs.macromol.1c01792
Xiaodong Lian ₁ , Shenglong Liao ₁ , Xiao-Qi Xu ₁ , Shoupeng Zhang ₁ , Yapei Wang ₁

Affiliation

在此，由水溶性引发剂引发的高反应性 α-氰基丙烯酸乙酯 (ECA) 单体的快速界面聚合 (FIP) 被证明是一种全新的方法，可在油水界面立即提供强大的空间势垒以有效稳定水-油中乳液和微胶囊分散体，无需添加剂界面活性剂。与由合成表面活性剂、两亲性聚合物和固体颗粒稳定的乳液相比，此类乳液具有独特且有吸引力的特性。尽管聚ECA聚合物是亲水性的，但油包水乳液是通过FIP方法异常产生的。通过调节聚合速率，不可逆吸收聚合物的界面覆盖率可在 15 s 内达到 100%，这也被认为是形成微胶囊分散体。通过微流体技术。这项工作中提出的通过 FIP 方法的自稳定封装过程确实在乳液和微胶囊的研究领域开辟了新的视野，并可能在多个领域具有有前景的工业应用。

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Self-Stabilizing Encapsulation through Fast Interfacial Polymerization of Ethyl α-Cyanoacrylate: From Emulsions to Microcapsule Dispersions

Herein, fast interfacial polymerization (FIP) of highly reactive ethyl α-cyanoacrylate (ECA) monomers triggered by water-soluble initiators is demonstrated as a brand new method for instantly providing a strong steric barrier at the oil–water interface to effectively stabilize water-in-oil emulsions and microcapsule dispersions without the assistance of additive interface-active agents. Compared with emulsions stabilized by synthetic surfactants, amphiphilic polymers, and solid particles, such emulsions exhibit unique and attractive properties. Although polyECA polymers are hydrophilic, water-in-oil emulsions are anomalously produced through the FIP method. By regulating the polymerization rate, the interfacial coverage of irreversibly absorbing polymers can reach 100% within only 15 s, which is also considered to form a microcapsule dispersion. Besides, this emulsification method is readily applicable to prepare high-internal-phase-emulsion-like (HIPE-like) systems with an internal-phase volume fraction of 75.0% and generate stable monodispersed droplets via a microfluidic technique. The self-stabilizing encapsulation process through the FIP method presented in this work does open a new sight in the research field of both emulsions and microcapsules and may possess promising industrial applications in multiple areas.

更新日期：2021-11-23

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