Puukilainen Esa, Rasilainen Tiina, Suvanto Mika, Pakkanen Tapani A
Department of Chemistry, University of Joensuu, FI-80101 Joensuu, Finland.
Langmuir. 2007 Jun 19;23(13):7263-8. doi: 10.1021/la063588h. Epub 2007 May 23.
Superhydrophobic polyolefin surfaces were prepared by simultaneous micro- and nanostructuring. Electropolished aluminum foil was microstructured with a micro working robot and then anodized in polyprotic acid. The surface microstructure can be tailored by adjusting the settings of the micro working robot and the nanostructure by adjusting the parameters of the anodization procedure. Surface structuring was done by injection molding where a microstructured anodized aluminum oxide mold insert was used to pattern the surfaces. Structuring had a marked effect on the contact angle between the injection-molded polyolefins and water. When the optimized microstructure was covered with nanostructure, the static contact angle between polypropylene and water obtained a value of about 165 degrees and the sliding angle decreased to about 2.5 degrees. The superhydrophobic state was achieved.
通过同时进行微纳结构化制备了超疏水聚烯烃表面。用电抛光铝箔通过微加工机器人进行微结构化处理，然后在多元酸中进行阳极氧化。可通过调整微加工机器人的设置来定制表面微观结构，并通过调整阳极氧化工艺参数来定制纳米结构。表面结构化是通过注塑成型完成的，其中使用微结构化的阳极氧化铝模具嵌件对表面进行图案化处理。结构化对注塑聚烯烃与水之间的接触角有显著影响。当优化的微观结构覆盖有纳米结构时，聚丙烯与水之间的静态接触角达到约165度，滑动角降至约2.5度。实现了超疏水状态。
