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    黄明达, 钱欣, 冯杰. 拉伸微模塑制备低密度聚乙烯超疏水表面[J]. 功能高分子学报, 2009, 22(2): 188-192.
    引用本文: 黄明达, 钱欣, 冯杰. 拉伸微模塑制备低密度聚乙烯超疏水表面[J]. 功能高分子学报, 2009, 22(2): 188-192.
    Fabrication of LDPE Superhydrophobic Surface by Stretching Controlled Micromolding[J]. Journal of Functional Polymers, 2009, 22(2): 188-192.
    Citation: Fabrication of LDPE Superhydrophobic Surface by Stretching Controlled Micromolding[J]. Journal of Functional Polymers, 2009, 22(2): 188-192.

    拉伸微模塑制备低密度聚乙烯超疏水表面

    Fabrication of LDPE Superhydrophobic Surface by Stretching Controlled Micromolding

    • 摘要: 以新鲜荷叶为原始模板制备聚二甲基硅氧烷(PDMS)软模板,并用该软模板在真空下热压得低密度聚乙烯(LDPE),冷却剥离得到LDPE超疏水薄膜。场发射扫描电镜(FESEM)显示其表面由细长乳突(长约30 μm)构成,接触角为154°±3.5°,水滴极易滚落,而常压下热压得到的薄膜表面乳突则短而粗(长约8~10 μm),接触角仅137°±2.7°。短粗的乳突高度接近模板微坑的深度,证明细长乳突是在微模塑脱模时拉伸形成的。

       

      Abstract: PDMS templates were prepared by replica molding against fresh lotus leaves. Then lowdensity polyethylene (LDPE) was melted and pressed onto the featured surface of the PDMS template in a vacuum oven. After cooling to room temperature and being peeled off from the templates, polyethylene films with superhydrophobic surface were created. FESEM imaging shows that the superhydrophobic surface is consist of slim and high micro-papillas (about 30 μm). The contact angle is 154°±3.5° and the water drops can easily skip down. While surface of LDPE films micromolded in general oven possess much lower papillas (8-10 μm) and the contact angle is 137°±2.7°. The height of lower papillas approaches the depth of microholes on PDMS templates demonstrating the higher papillas have been stretched longer from the holes of the template during separating operation.

       

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