Electrochemical Deactivation of Switchable Catechol-Containing Smart Adhesive from Nonconductive Surfaces
Electrochemical Deactivation of Switchable Catechol-Containing Smart Adhesive from Nonconductive Surfaces
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DOI：
10.1021/acsapm.3c00103
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发表时间：
2023-05
影响因子：
5
通讯作者：
Md. Saleh Akram Bhuiyan;J. Manuel;Fatemeh Razaviamri;Bruce P. Lee
中科院分区：
文献类型：
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作者：
Md. Saleh Akram Bhuiyan;J. Manuel;Fatemeh Razaviamri;Bruce P. Lee
这项工作探讨了在与非导电表面直接接触时以电化学方式使含儿茶酚智能粘合剂失活和重新激活的可行性。将粘合剂涂覆在附有铝网的聚（二甲基硅氧烷）（AM-PDMS）基材上。铝网充当电极，通过粘合剂施加电流。在粘合剂-基板界面的外围涂上银（Ag）反电极，以使附着在玻璃和聚甲基丙烯酸甲酯（PMMA）基板等非导电表面上的粘合剂失活。利用银电极作为阴极、铝网作为阳极，施加高达 20V 的电压来使粘合剂失活。原位通电后，粘合剂对非导电表面的粘合强度下降了 98%。失活速率可通过施加的电压水平、施加电压的暴露时间、粘合剂界面的表面积和铝网尺寸来调节。通过利用儿茶酚-硼酸盐络合化学将电极极性反转最多 3 个循环，以电化学方式重新激活失活的粘合剂。
The feasibility of deactivating and reactivating a catechol-containing smart adhesive electrochemically while in direct contact with a nonconductive surface was explored in this work. The adhesive was coated over an aluminum mesh-attached poly(dimethylsiloxane) (AM-PDMS) substrate. The aluminum mesh served as an electrode to apply electricity through the adhesive. A silver (Ag) counter electrode was coated in the periphery of the adhesive–substrate interface to deactivate the adhesive attached to the nonconductive surfaces including glass and poly(methyl methacrylate) (PMMA) substrates. The deactivation of the adhesive was performed with the application of up to 20 V of applied electricity utilizing the Ag electrode as a cathode and the aluminum mesh as an anode. The adhesion strength of the adhesive toward nonconductive surfaces decreased by 98% after in situ application of electricity. The deactivation rate was tunable with the applied voltage level, exposure time to the applied voltage, surface area of the adhesive interface, and aluminum mesh size. The deactivated adhesive was reactivated electrochemically by reversing the electrode polarity up to 3 cycles utilizing catechol–boronate complexation chemistry.