Cui Zhe, Yin Long, Wang Qingjun, Ding Jianfu, Chen Qingmin
Polymer Science and Engineering Department, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China.
J Colloid Interface Sci. 2009 Sep 15;337(2):531-7. doi: 10.1016/j.jcis.2009.05.061. Epub 2009 Jun 2.
Superhydrophobic surfaces with multi-scale nano/microstructures have been prepared on epoxy paint surfaces using a feasible dip-coating process. The microstructures with 5-10 microm protuberances were first prepared on epoxy paint surface by sandblast. Then the nanostructures were introduced on the microstructure surface by anchoring 50-100 nm SiO(2) particles (nano-SiO(2)) onto the sandblasted paint surface, which was completed by dip-coating with a nano-SiO(2)/epoxy adhesive solution (M1). At last the surface was further modified for enhancing hydrophobicity by another dip-coating with a solution of a low surface energy polymer, aminopropyl terminated polydimethylsiloxane (ATPS) modified epoxy adhesive (M2). The water contact angle of the as-prepared samples reached as high as 167.8 degrees and the sliding angle was 7 degrees. The prepared superhydrophobic surface exhibited excellent durability to the high speed scouring test and high stability in neutral and basic aqueous solutions and some common organic solvents. In addition, this method can be adopted to fabricate large scale samples with a good homogeneity of the whole surface at very low cost.
通过一种可行的浸涂工艺，在环氧漆表面制备了具有多尺度纳米/微结构的超疏水表面。首先通过喷砂在环氧漆表面制备出具有5-10微米凸起的微结构。然后通过将50-100纳米的二氧化硅颗粒（纳米二氧化硅）锚定在喷砂处理后的漆表面，在微结构表面引入纳米结构，这通过用纳米二氧化硅/环氧粘合剂溶液（M1）进行浸涂来完成。最后，通过用低表面能聚合物氨丙基封端的聚二甲基硅氧烷（ATPS）改性环氧粘合剂（M2）溶液进行另一次浸涂，对表面进行进一步改性以增强疏水性。所制备样品的水接触角高达167.8度，滑动角为7度。所制备的超疏水表面在高速冲刷试验中表现出优异的耐久性，在中性和碱性水溶液以及一些常见有机溶剂中具有高稳定性。此外，该方法可以以非常低的成本用于制造具有良好整体表面均匀性的大规模样品。
