Janus Particles with Varying Configurations for Emulsion Stabilization
Janus Particles with Varying Configurations for Emulsion Stabilization
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DOI：
10.1021/acs.iecr.9b02697
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发表时间：
2019-07
影响因子：
4.2
通讯作者：
Yang Lan;Je Choi;Haoyang Li;Yankai Jia;Renjing Huang;K. Stebe;Daeyeon Lee
中科院分区：
文献类型：
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作者：
Yang Lan;Je Choi;Haoyang Li;Yankai Jia;Renjing Huang;K. Stebe;Daeyeon Lee
与分子表面活性剂类似，两亲性Janus颗粒可以作为表面活性剂来稳定乳剂。对于分子表面活性剂，形状和两亲性，分别由填料参数和亲水-亲脂平衡（HLB）来描述，决定了所产生的乳液的类型。然而，目前尚不清楚Janus颗粒的哪些特征决定了这些颗粒可以稳定乳液的类型。在本研究中，通过种子乳液聚合合成了一系列具有可移动Janus边界和可调化学性质的两亲性Janus粒子。我们系统地研究了亲水畴的相对大小对总颗粒（构型）的影响以及Janus颗粒的化学性质对其乳化性能的影响。引入了Janus结构参数（JSP）的概念来描述Janus粒子的构型。乳化实验结果表明，Janus颗粒的构型在乳化过程中具有较好的稳定性。
Analogous to molecular surfactants, amphiphilic Janus particles can function as surface active agents to stabilize emulsions. For molecular surfactants, the shape and amphiphilicity, described by packing parameters and hydrophilic–lipophilic balance (HLB), respectively, determine the type of emulsions that are produced. However, it remains unclear which features of Janus particles determine the type of emulsion that can be stabilized by these particles. In this study, a homologous series of amphiphilic Janus particles with shifting Janus boundaries and tunable chemical properties are synthesized via seeded emulsion polymerization. We systematically study the effect of the relative size of the hydrophilic domain to the total particle (configuration) and chemical nature of Janus particles on their emulsification properties. The concept of the Janus structure parameter (JSP) is introduced to describe the configuration of Janus particles. The emulsification results show that the configuration of Janus particl...