Effect of Solvophilic Chain Length in PISA Particles on Pickering Emulsion†,Chinese Journal of Chemistry

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Effect of Solvophilic Chain Length in PISA Particles on Pickering Emulsion†
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2021-09-06 , DOI: 10.1002/cjoc.202100457
Min Zeng ₁ , Shuo Zhou ₁ , Xiaofeng Sui ₂ , Jinying Yuan ₁

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The morphology of polymeric nanoparticles prepared by polymerization-induced self-assembly (PISA) is depended on the degree of polymerization of the solvophilic and solvophobic blocks. Herein, a series of poly (N,N-dimethylaminoethyl methacrylate)-b-poly (benzyl methacrylate) (PDMA-b-PBzMA) diblock copolymer spherical nanoparticles were synthesized via reversible addition-fragmentation chain transfer (RAFT) mediated PISA. These diblock copolymer nanoparticles are with nearly the same hydrodynamic size and solvophobic chain length, but with different solvophilic chain length. We used these nanoparticles to stabilize the oil-in-water Pickering emulsion. We find that the stability of Pickering emulsion increases with the length of solvophilic chain of the nanoparticles. Moreover, the droplet size of the Pickering emulsion can be tailored by varying the oil/water ratio and concentration of nanoparticles.

中文翻译：

PISA 颗粒中的亲溶剂链长对 Pickering 乳液的影响†

通过聚合诱导自组装 (PISA) 制备的聚合物纳米粒子的形态取决于亲溶剂和疏溶剂嵌段的聚合度。在此，一系列聚（N，N-二甲基氨基乙基甲基丙烯酸酯）-b-聚（甲基丙烯酸苄酯）（PDMA- b-PBzMA) 二嵌段共聚物球形纳米粒子是通过可逆加成-断裂链转移 (RAFT) 介导的 PISA 合成的。这些二嵌段共聚物纳米粒子具有几乎相同的流体力学尺寸和疏溶剂链长，但具有不同的亲溶剂链长。我们使用这些纳米粒子来稳定水包油皮克林乳液。我们发现 Pickering 乳液的稳定性随着纳米颗粒亲溶剂链的长度增加而增加。此外，Pickering 乳液的液滴尺寸可以通过改变油/水比和纳米颗粒的浓度来定制。

更新日期：2021-11-15

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