Hydrophobic stretchable polydimethylsiloxane films with wrinkle patterns prepared via a metal‐assisted chemical etching process using a Si master mold,Journal of Applied Polymer Science

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Hydrophobic stretchable polydimethylsiloxane films with wrinkle patterns prepared via a metal‐assisted chemical etching process using a Si master mold
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-12-17 , DOI: 10.1002/app.50398
Hanbin Lee ₁ , Sangmin Chae ₁ , Ahra Yi ₁ , Hyo Jung Kim ₁

Affiliation

We fabricated hydrophobic, stretchable, wrinkle‐patterned polydimethylsiloxane (PDMS) films via a metal‐assisted chemical etching (MACE) process using a Si master mold, which is a mask‐free technique for fabricating large‐area films. The wrinkle‐patterned PDMS surface prepared via MACE exhibited high hydrophobicity and stretchability, which are difficult to achieve with wrinkle‐patterned PDMS prepared via a conventional process, such as, plasma treatment, e‐beam, or laser patterning. The contact angle of the wrinkled PDMS surface was dependent on the size of the micro/nanostructures, and the largest contact angle was 135.8 ± 0.1° for the film prepared under the optimum conditions. To confirm the applicability of the wrinkled PDMS films to flexible electronics, we tuned the mechanical properties by controlling the crosslinker ratio in the films. The Young's modulus ranged from 0.193 to 1.364 MPa depending on the crosslinker ratio, and the stress of the optimum film was 1.5 MPa under 250% strain.

中文翻译：

通过使用硅原模的金属辅助化学蚀刻工艺制备的具有皱纹的疏水性可拉伸聚二甲基硅氧烷薄膜

我们使用Si主模通过金属辅助化学蚀刻（MACE）工艺制造了疏水，可拉伸，具有皱纹图案的聚二甲基硅氧烷（PDMS）膜，该工艺是无掩模技术，用于制造大面积膜。通过MACE制备的具有皱纹图案的PDMS表面表现出高疏水性和可拉伸性，而采用常规工艺（如等离子处理，电子束或激光图案化）制备的具有皱纹图案的PDMS难以实现。起皱的PDMS表面的接触角取决于微/纳米结构的尺寸，在最佳条件下制备的薄膜的最大接触角为135.8±0.1°。为了确认起皱的PDMS薄膜对柔性电子产品的适用性，我们通过控制薄膜中的交联剂比率来调整机械性能。

更新日期：2021-02-18

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