电场诱导聚合物流变成型技术作为一种新型的微纳米成型技术受到越来越多的关注。详细介绍了电场诱导作用下聚合物微结构的成型机理,得到了影响电场诱导实验的关键参数。在常温条件下通过在图形化的硅模板和基底之间施加电压使热固性聚二甲基硅氧烷(PDMS)流变成型,分析了聚合物黏度、电压和空气间隙对聚合物成型的影响。研究结果表明,增大PDMS的黏度、提高电压以及降低空气间隙有利于聚合物在电场诱导作用下成型。针对PDMS在电场诱导过程中成型质量欠佳的问题,提出了一种基于电场诱导的新工艺。该工艺将金属模板引入常规电场诱导实验中,使预突起的聚合物在电场作用下沿金属模板孔壁生长,从而形成了一种双层异形结构。用新工艺制备的双层异形微结构薄膜具有超疏水特性,其接触角达到150°。
As a new type of micro-nanostructure forming technology,the electrically induced patterning technique has attracted more and more scholars' attention.The forming mechanism of polymer under the action of electric field was studied by theoretical analysis.The key parameters affecting the electrically induced were obtained.PDMS was formed by applying voltage between the patterned silicon template and the substrate at room temperature.The effect of polymer viscosity,voltage and air gap on polymer molding were analyzed.The results showed that increasing the viscosity of PDMS,voltage and reducing the air gap were beneficial to the induction molding of polymer under the electric field.In view of the poor quality of PDMS in electrically induced,a new process based on electrically induced was proposed.This method by introducing the metal template into the conventional electrically induced test,the method can make the pre-protrusion polymer grown along the hole wall of metal template under the electric field,thus forming a double layer heterotypic structure.The prepared film had superhydrophobic properties,and the contact angle reached 151°.
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基金资助
陕西省教育厅重点实验室科学研究计划项目(18JS059)
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