【作者】 林畅； 黄玉芳； 孙雪； 张卫英； 李晓；

【Author】 Lin Chang;Huang Yufang;Sun Xue;Zhang Weiying;Li Xiao;College of Chemical Engineering, Fuzhou University;

【机构】 福州大学石油化工学院；

【摘要】 <正>本研究模仿植物叶背随机阵列气孔结构(Fig.1a),采用溶胶凝胶法在聚二甲基硅氧烷(PDMS)表面构筑了具有仿生气孔结构的超疏水性表面,并建立了相应的浸润模型。将交联固化的PDMS放入正硅酸四乙酯(TEOS)中溶胀,然后漂浮于乙二胺(EDA)水溶液表面,自然析出PDMS表面的TEOS微液滴在乙二胺蒸气和水蒸气的作用下,通过水解-缩合-聚合形成二氧化硅凝胶微空腔,最后热处理使微空腔破裂形成仿生气孔(Fig.1b)。该表面的接触角(CA)高达159.3±3°,呈超疏水性。更多还原

【Abstract】 A superhydrophobic surface is fabricated with bionic micropores randomly on PDMS surface by sol-gel method. The cured PDMS is first swollen with TEOS and then floated on the aqueous solution of ethanediamine(EDA). TEOS is spontaneously released onto the PDMS surface to form randomly the micro-droplets array, which transform to silica gel microcavities through hydrolysis and condensation polymerization. Finally, the microcavities are broken to form micropores by annealing.The contact angle of water droplet on the superhydrophobic surface is 159.3±3°.Furthermore, a simplified 2 D physical model is proposed for the superhydrophobic surface covered with bionic micropores array, and the mathematical model is established based on the Cassie’s model.更多还原