Wettability modification of polydimethylsiloxane surface by fabricating micropillar and microhole arrays
Wettability modification of polydimethylsiloxane surface by fabricating micropillar and microhole arrays
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DOI：
10.1016/j.matlet.2017.03.103
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发表时间：
2017-06-01
影响因子：
3
通讯作者：
Kameya, Yuki
中科院分区：
文献类型：
--
作者：
Kameya, Yuki
制备微尺度表面结构是控制材料表面润湿性的一种很有前途的方法。采用软光刻技术制备了聚二甲基硅氧烷（PDMS）微柱和微孔阵列，并对改性后的润湿性进行了研究。利用不同交联程度的PDMS样品，实现了PDMS-PDMS模式转移，并在单一主衬底上获得了微孔和微柱阵列。利用扫描电镜和激光扫描显微镜对制备的PDMS样品进行了表面形貌表征。结果表明，PDMS微柱和微孔阵列可以有效地改变不同表面张力液体（水、乙二醇、橄榄油和十六烷）的接触角。基于Cassie-Baxter模型，PDMS微柱阵列上测量的液体接触角在润湿和驱避两种情况下进行了定量解释。(C) 2017 Elsevier b.v.版权所有
Fabrication of microscale surface structures is a promising method for controlling the surface wettability of materials. Herein, the micropillar and microhole arrays of polydimethylsiloxane (PDMS) were fabricated through a soft lithography process, and the modified wettability was investigated. Using PDMS samples with different degrees of crosslinking, a PDMS-PDMS pattern transfer was achieved, and the microhole and micropillar arrays were obtained from a single master substrate. The surface geometries of the prepared PDMS samples were characterized via scanning electron microscopy and laser scanning microscopy. It was demonstrated that the PDMS micropillar and microhole arrays were effective in changing the contact angles of liquids with different surface tensions (water, ethylene glycol, olive oil, and hexadecane). The measured contact angles of the liquids on a PDMS micropillar array were quantitatively interpreted in both the wetting and repellent regimes based on the Cassie-Baxter model. (C) 2017 Elsevier B. V. All rights reserved.