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Making Nonsticky Surfaces of Sticky Materials: Self-Organized Microtexturing of Viscoelastic Elastomeric Layers by Tearing
Langmuir ( IF 3.7 ) Pub Date : 2018-03-05 00:00:00 , DOI: 10.1021/acs.langmuir.7b04389
Sandip Patil 1 , Tushar Deshpande 1 , Nayantika Chaudhari 1 , Yogesh R. G. Singh 1 , Janhavi Raut 2 , Yogesh M. Joshi 1 , Ashutosh Sharma 1
Affiliation  

Fabrication of large area, multiscale microtextured surfaces engineered for antiadhesion properties remains a challenge. Compared to an elastic surface, viscoelastic solids show much higher surface stickiness, tack, and adhesion owing to the increased contact area and energy dissipation. Here, we show a simple, low cost, large-area and high throughput method with roll-to-roll compatibility to fabricate multiscale, rough microstructures resistant to adhesion in a viscoelastic layer by controlled tearing of viscous film. Even a high adhesive strength viscoelastic solid layer, such as partially cured PDMS, is made nonsticky simply by its controlled tearing. The torn surface shows a fracture induced, self-organized leaflike micropattern resistant to sticking. The topography and adhesion strength of these structures are readily tuned by changing the tearing speed and the film thickness. The microtexture displays a springlike recovery, low adhesive strength, and easy release properties even under the high applied loads.

中文翻译:

制作粘性材料的非粘性表面:通过撕裂对粘弹性弹性体层进行自组织微纹理化

为抗粘连性能而设计的大面积,多尺度微织构表面的制造仍然是一个挑战。与弹性表面相比,粘弹性固体由于增加的接触面积和能量耗散而显示出更高的表面粘性,粘性和粘附性。在这里,我们展示了一种简单,低成本,大面积和高产量的方法,具有卷对卷兼容性,可通过控制粘性膜的撕裂来制造多尺度,粗糙的微结构,以抵抗粘弹性层中的粘附。即使是高粘合强度的粘弹性固体层,例如部分固化的PDMS,也可以通过其受控的撕裂而变得不粘。撕裂的表面显示出由裂缝引起的自组织叶状微图案,具有抗粘着性。通过改变撕裂速度和膜厚,可以轻松调整这些结构的形貌和粘附强度。即使在高施加载荷下,微织构也显示出类似弹簧的回复性,低粘合强度和易剥离性。
更新日期:2018-03-05
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