Skin Adhesives with Controlled Adhesion by Polymer Chain Mobility

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Abstract
Wearable devices have attracted numerous attentions because of their importance in biomedical and electronic fields. However, as one of important fixing materials, skin adhesives with controlled adhesion are often ignored. Although remarkable progresses have been achieved in revealing natural adhesion mechanism and biomimetic materials to complex solid surfaces, it remains great challenge to explore non-irritant, controlled skin adhesives without surface structure. Herein, we present skin adhesive patches of polydimethylsiloxane (SAPs) with controlled adhesion by simply modulating polymer chain mobility at molecular level. The controlled adhesion of SAP strongly depends on the proportion of polymer chains with different mobility exposed to the solid surface, including free chains, dangling chains and cross-linking chains. As a proof of concept, we demonstrate that the SAP can act as a skin-friendly fixer to monitor human pulse by integrating with poly (vinylidene fluoride-trifluorethylene)/reduced graphene oxide (P(VDF-TrFE)@rGO) nanofiber sensor. This study provides a clue to design durable and skin-friendly adhesives with controlled adhesion for wearable devices.
Funding Information
  • Ministry of Education of the People's Republic of China (FRF-BR-17-002B, FRF-TP-17-051A1)
  • National Natural Science Foundation of China (21425314, 21421061, 21434009)
  • Central Committee of the Communist Party of China

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