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Electric Field and Ion Diffusion Triggered Precisely Regulated Construction of Micron-scale Water-based Polymer Films:a Detailed Mechanistic Exploration

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Chemical Research in Chinese Universities 2022年第6期38卷 1435-1445页

作者： WANG Dan LIU Jinfang YANG Shuqi JI Xin WANG Yuliang OMONIYI Ahmed Olalekan ZHANG Jianfu SU Zhongmin School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun130022P.R.China School of Chemistry and Environmental Engineering Changchun University of Science and TechnologyChangchun130022P.R.China Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry Changchun University of Science and TechnologyChangchun130022P.R.China

Water-based polymer films can be readily deposited onto a wide range of metallic materials as an environmentally friendly coating through the demulsification-induced fast solidification(DIFS)***,there is still a lack of in-depth understanding of the demulsification process of the water-based emulsions and their deposition ***,we demonstrate that the build-up process of the commercial water-based micron-scale waterborne polyurethane,polyvinyl acetate,polyurethane acrylate,and natural rubber polymer films is affected by the collective effect of electric field and ion diffusion exerted by anode-cathode electrode pairs,applied voltage,conduction time,electrode distance,and emulsion species.A structural investigation of as-prepared polymer films allows us to propose two new structure build-up *** a flat film deposition,isolated islands are formed first and grow on the substrate surface,and eventually,their mutual coalescence forms the final ***,for a convex layer formation,the layer is first formed in the middle of the substrate and then grows toward the sides of the convex structure of the *** results presented in this work expand the understanding of the mechanism of the DIFS process and may provide some new insights into structure-oriented multifunctional material design.

关键词： Polymer film Emulsion demulsification-induced fast solidification Mechanism

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