Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, UP, India.
Langmuir. 2012 Jan 10;28(1):42-6. doi: 10.1021/la203871c. Epub 2011 Dec 27.
Although the viscoelasticity or tackiness of a pressure-sensitive adhesive gives it strength owing to energy dissipation during peeling, it also renders it nonreusable because of structural changes such as the formation of fibrils, cohesive failure, and fouling. However, an elastic layer has good structural integrity and cohesive strength but low adhesive energy. We demonstrate an effective composite adhesive in which a soft viscoelastic bulk layer is imbedded in a largely elastic thin skin layer. The composite layer is able to meet the conflicting demands of the high peel strength comparable to the viscoelastic core and the structural integrity, reusability, and antifouling properties of the elastic skin. Our model adhesive is made of poly(dimethylsiloxane), where its core and skin are created by varying the cross-linking percentage from 2 to 10%.
虽然压敏胶的粘性或粘性使其在剥离过程中由于能量耗散而具有强度，但由于形成原纤、内聚破坏和结垢等结构变化，它也变得不可重复使用。然而，弹性层具有良好的结构完整性和内聚强度，但粘合能较低。我们展示了一种有效的复合粘合剂，其中软粘性体层嵌入在大弹性薄皮层中。复合层能够满足高剥离强度（与粘性核相当）与弹性皮的结构完整性、可重复使用性和防污性的矛盾需求。我们的模型粘合剂由聚二甲基硅氧烷制成，其核和皮通过改变交联百分比从 2 到 10%来制造。
