通过粒子辅助水滴模板法制备超疏水材料

发布时间：2018-01-05 17:07

本文关键词：通过粒子辅助水滴模板法制备超疏水材料　出处：《高分子材料科学与工程》2017年05期 　论文类型：期刊论文

【摘要】：利用水滴模板法成功制备出孔径可控的具有结构规则的聚合物多孔膜,并以所制备多孔膜为模板利用反向复刻法复制孔洞阵列结构,得到具有微米级突起阵列结构的聚二甲基硅氧烷(PDMS)膜片,然后将事先排布好的二氧化硅微球阵列通过热压印法转移到具有微米级突起结构的PDMS膜片上,然后成功制备出具有微纳米复合突起结构的膜片。通过对具有不同突起结构组合的PDMS膜片进行接触角测试发现,膜片的接触角随着其表面粗糙程度的增大而增大,即具有微纳复合结构膜片接触角((150.7±3.2)°)最大,达到了超疏水的效果;无突起结构膜片的接触角((108.9±3.1)°)最小;而仅具有微米级结构膜片的接触角((134.6±1.0)°)居中,这符合目前已知的物质表面浸润性与其表面粗糙度的关系。另外,经测试,具有微纳复合结构的膜片接触角最大达到155°,同时具有非常大的滚动角,使得这种膜片材料具备了粘性超疏水的性能,而这种特殊浸润表面性质可以在液体无损传输、生化分离等领域拥有巨大的应用前景。
[Abstract]:The porous polymer membranes with controllable pore size and regular structure were successfully prepared by the water drop template method, and the porous membrane was used as template to duplicate the pore array structure by reverse reetching. Poly (Dimethylsiloxane) PDMS (PDMS) membrane with micron protruding array structure was obtained. Then the pre-arranged silica microsphere array was transferred to the PDMS membrane with micrometer protruding structure by hot stamping method. Then the membrane with micro-nano-composite protruding structure was successfully prepared. The contact angle of the PDMS membrane with different protruding structures was measured. The contact angle of the diaphragm increases with the increase of surface roughness, that is, the contact angle of the membrane with micro-nano composite structure is 150.7 卤3.2 掳), which achieves the effect of superhydrophobicity. The contact angle of the diaphragm without protuberance was 108.9 卤3.1 掳). The contact angle is 134.6 卤1.0 掳), which is consistent with the known relationship between the surface wettability and the surface roughness. In addition, it has been tested. The contact angle of the membrane with micro-nano composite structure is up to 155 掳, and it has a very large rolling angle, which makes the membrane material have the property of viscous superhydrophobicity. The special surface properties can be widely used in liquid lossless transport, biochemical separation and so on.
【作者单位】：宁波大学材料化学与工程学院高分子科学与工程系;宁波大学材料化学与工程学院宁波市特种高分子材料制备与应用技术重点实验室;
【基金】：国家自然科学基金资助项目(21104036) 宁波市自然科学基金资助项目(2015A610057) 宁波大学王宽诚幸福基金
【分类号】：TB383.2
【正文快照】： 超疏水材料由于所具有的特种表面浸润性能,在抗污[1]、水油分离[2,3]等方面具有巨大的应用前景,因此备受关注。超疏水现象在自然界中也广泛存在,例如,水滴落在荷叶表面上时,难以在荷叶上铺展开而仍保持球形,这是荷叶具有超疏水性能的表现[4]。研究表明,荷叶表面具有大量的微纳

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