聚合物纳米粒子包覆 Pickering 乳液合成的导电聚苯胺杂化粒子及其电流变性能研究。

Polymeric Nanoparticle-Coated Pickering Emulsion-Synthesized Conducting Polyaniline Hybrid Particles and Their Electrorheological Study.

机构信息

Department of Polymer Science and Engineering, Inha University , Incheon 22212, Korea.

RIAM, Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.

出版信息

ACS Appl Mater Interfaces. 2017 Dec 27;9(51):44811-44819. doi: 10.1021/acsami.7b13808. Epub 2017 Dec 14.

DOI:10.1021/acsami.7b13808

PMID:29193955

Abstract

To produce an electric stimuli-responsive electrorheological (ER) material, semiconducting core/shell-type polyaniline (PANI) hybrid particles were fabricated through Pickering emulsion-type polymerization, using poly(divinylbenzene-alt-maleic anhydride) (PDVMA) particles as a solid surfactant. The PDVMA nanoparticles were initially polymerized using a self-stable precipitation method. The fabricated PANI/PDVMA composite particles were subjected to various chemical characterizations; further, they were suspended in silicone oil at 10 vol % to prepare an ER fluid, and their viscoelastic behaviors were scrutinized using a rheometer under various input electric fields. We also adopted an LCR meter to evaluate its dielectric characteristics. Our results showed that the PANI/PDVMA composite particles display typical ER performance, such that both dynamic and elastic yield stresses follow a polarization mechanism with a slope of 2.0.

摘要

为制备电刺激响应的电流变（ER）材料，通过 Pickering 乳液型聚合，使用聚（二乙烯基苯-alt-马来酸酐）（PDVMA）颗粒作为固体表面活性剂，制备了半导体核/壳型聚苯胺（PANI）杂化粒子。首先使用自稳定沉淀法聚合 PDVMA 纳米颗粒。对制备的 PANI/PDVMA 复合粒子进行了各种化学特性分析；进一步，将其在硅油中以 10vol%的浓度悬浮，制备 ER 流体，并使用流变仪在各种输入电场下研究其粘弹性行为。我们还采用 LCR 仪表评估其介电特性。结果表明，PANI/PDVMA 复合粒子表现出典型的 ER 性能，即动态和弹性屈服应力均遵循具有 2.0 斜率的极化机制。