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<p>The preparation and functionalization of polymeric capsules attract intense attention due to their application in various areas. Herein we presented an amphiphilic alternating copolymer (ACP)-based microcapsule which is both robust and readily-functionalized through interfacial click polymerization. A water-in-oil emulsion was constructed to act as the reaction medium, the hydrophilic 1,3-butadiene diepoxide (BDE) in water phase reacted with the oleophilic 1,4-dibutanedithiol (BDT) in oil phase at the water-oil interface to form the amphiphilic ACP named poly(2,3-dihydroxy butylene-alt-butylene dithioether) (abbreviated as P(DHB-<i>a</i>-BDT) below), which would deposite <i>in situ</i> to form the micro-sized capsules. Significantly, the dried capsules are robust enough to be rehydrated once the water was added and almost restored their original morphologies. Further elucidation showed that the Young’s modulus of these capsules exceeded 1 GPa. As long as we know, it is the first time for the mechanical properties of the ACP-based microstructures being investigated. Besides, functionalization could be achieved simultaneously with the formation process. As a proof of concept, positive-charged capsules were successfully obtained through click copolymerization. Stemming from the unique characteristics of amphiphilic ACPs which combined both merits of click chemistry and interfacial reactions, all these features of the current method as well as the resultant capsules may promote the application of the polymeric capsules.</p>

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Robust and Readily Functionalized Microcapsules from Interfacial Click Polymerization of Amphiphilic Alternating Copolymers

  • 期刊论文

  • 发表日期：

    2026年1月23日

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  • Qing-Song Xu,
  • Min-Jiang Zhu,
  • Xiu-Ting Li,
  • Jie Dong,
  • Xin Zhao,
  • Qing-Hua Zhang,
  • Yong-Feng Zhou

摘要

The preparation and functionalization of polymeric capsules attract intense attention due to their application in various areas. Herein we presented an amphiphilic alternating copolymer (ACP)-based microcapsule which is both robust and readily-functionalized through interfacial click polymerization. A water-in-oil emulsion was constructed to act as the reaction medium, the hydrophilic 1,3-butadiene diepoxide (BDE) in water phase reacted with the oleophilic 1,4-dibutanedithiol (BDT) in oil phase at the water-oil interface to form the amphiphilic ACP named poly(2,3-dihydroxy butylene-alt-butylene dithioether) (abbreviated as P(DHB-a-BDT) below), which would deposite in situ to form the micro-sized capsules. Significantly, the dried capsules are robust enough to be rehydrated once the water was added and almost restored their original morphologies. Further elucidation showed that the Young’s modulus of these capsules exceeded 1 GPa. As long as we know, it is the first time for the mechanical properties of the ACP-based microstructures being investigated. Besides, functionalization could be achieved simultaneously with the formation process. As a proof of concept, positive-charged capsules were successfully obtained through click copolymerization. Stemming from the unique characteristics of amphiphilic ACPs which combined both merits of click chemistry and interfacial reactions, all these features of the current method as well as the resultant capsules may promote the application of the polymeric capsules.