多孔PMP聚合物薄膜微结构控制

Microstructure controlling of low density PMP foam films

将二氧化硅(SiO2)微球为模板材料分散在聚-4-甲基-1-戊烯(PMP)溶液中,通过对流自组装方法将其涂覆于基片上,经过热致相分离(TIPS)过程形成含SiO2微球模板的PMP薄膜,然后通过氢氟酸(HF)溶液腐蚀除去SiO2微球,获得了具有规则多孔结构的PMP聚合物薄膜。采用扫描电子显微镜(SEM)对含SiO2微球的PMP薄膜以及除去SiO2微球后的PMP多孔薄膜的微结构进行了表征。研究结果表明:SiO2微球在聚合物中呈有序排列,腐蚀除去SiO2微球后PMP薄膜有效复制了SiO2微球形成的有序结构,形成了有序多孔PMP薄膜。

SiO2 colloids were dispersed in hot poly-4-methyl-l-pentene （PMP） solution, and then the solution was coated on glass microscope slices by convective assembly method. PMP foam films compounded with SiOz colloids template were formed through thermally induced phase separation （TIPS） and then they were eroded by hydrofluoric acid （HF） solution to obtain regular porous PMP foam films. The microstructures of PMP foam films compounded with SiO2 colloids template and regular porous PMP foam films were analyzed by scanning electron microscopy （SEM）. The results show that SiO2 colloids were arranged uniformly and regularly, and the PMP foam films eroded by HF solution had formed uniform and regular porous microstructure which replicated the microstructure of SiO2 colloids.