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首页> 外文期刊>Journal of Applied Polymer Science >Pickering emulsions stabilized with PANI-NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation
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Pickering emulsions stabilized with PANI-NP. Study of the thermoresponsive behavior under heating and radiofrequency irradiation

机译：用PANI-NP稳定的皮克林乳液。 加热下热敏性行为的研究与射频照射

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摘要

Micrometric Pickering emulsions in 1-octanol or cyclohexane were stabilized with water-dispersible electroactive polyaniline nanoparticles (PANI-NP). The emulsions were characterized by optical and electronic microscopy as well as spectroscopic techniques. It was demonstrated that nanoparticles maintain their functional properties (e.g., pH sensitivity and electromagnetic absorption) in the emulsion. Furthermore, as a proof of concept, smart Pickering emulsions employing PANI-NP stabilized with a thermosensitive polymer (PNIPAM) were obtained. The thermal behavior of the obtained structures was evaluated by turbidimetric techniques and an IR camera. The thermoresponsive emulsions have shown an important increment of the local temperature (>12 degrees C) under radiofrequency (RF) irradiation. Phase transition of PNIPAM induced by heating or RF absorption provokes the breaking of the emulsions. In this context, the proposed systems herein could induce endothermal reactions carried out in organic solvents. Besides, Pickering emulsions formed by using electroactive PANI-NP could be applied in several medical or industrial applications.
机译：在1-辛醇或环己烷中用水分散的电活性聚苯胺纳米颗粒（PANI-NP）稳定测微Pickering乳液。通过光学和电子显微镜以及光谱技术对乳液进行了表征。结果表明，纳米粒子在乳液中保持其功能特性（例如，pH敏感性和电磁吸收）。此外，作为概念证明，获得了使用由热敏聚合物（PNIPAM）稳定的PANI-NP的智能Pickering乳液。通过浊度测量技术和红外相机对所得结构的热行为进行了评估。在射频（RF）照射下，热响应乳液的局部温度（>12℃）显著升高。由加热或射频吸收引起的PNIPAM相变引起乳液破裂。在这种情况下，本文提出的系统可以诱导在有机溶剂中进行吸热反应。此外，由电活性PANI-NP形成的Pickering乳液可用于多种医疗或工业应用。

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