Reversible Dendritic‐Crystal‐Reinforced Polymer Gel for Bioinspired Adaptable Adhesive. Issue 40 (21st August 2021)

• Record Type: Journal Article
• Authors: Xi, Songyan; Tian, Feng; Wei, Gumi; He, Xian; Shang, Yinghui; Ju, Ye; Li, Wenjun; Lu, Qinghua; Wang, Qigang
• Is Part Of: Advanced materials. Volume 33:Issue 40(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-21
• Subjects: adaptable adhesives -- bioinspired reversible adhesion -- crystal fibers reinforcement -- dissipative matrixes -- mechanical interlocking; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202103174
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: High‐strength and reversible adhesion technology, which is a universal phenomenon in nature but remains challenging for artificial synthesis, is essential for the development of modern science. Existing adhesive designs without interface versatility hinder their application to arbitrary surfaces. Bioinspired by creeper suckers, a crystal‐fiber reinforced polymer gel adhesive with ultrastrong adhesion strength and universal interface adaptability is creatively prepared via introducing a room‐temperature crystallizable solvent into the polymer network. The gel adhesive formed by hydrogen bonding interaction between crystal fibers and polymer network can successfully realize over 9.82 MPa reversible adhesion strength for rough interface and 406.87 J m −2 peeling toughness for skin tissue. In situ anchoring is achieved for adapting to different geometrical surfaces. The adhesion performance can be significantly improved with the further increase of the interfacial roughness and hydrophilicity, whose dissipation mechanism is simulated by finite element analysis. The melting–crystallization equilibrium of the crystal fibers is proved by synchrotron radiation scattering. Accordingly, reversible phase‐transition triggered by light and heat can realize the controlled adhere–detach recycle. Later adjustments to the monomers or crystals are expected to broaden its applications to various fields such as bioelectronics, electronic processing, and machine handling. Abstract : A crystal‐fiber‐reinforced polymer gel adhesive is prepared by introducing room‐temperature crystallizable solvent into the polymer network, realizing ultrastrong adhesion strength and universal interface adaptability. The adhesive ensures the high adhesion strength to the hard interface and excellent peeling toughness to soft biological tissues and can be adjusted via external stimuli, which achieves superior detachability and recycling performance.