Bentonite Reinforced Tough Composite Hydrogels as Potential Artificial Articular Cartilage

doi:10.1007/s40242-018-8219-6

Abstract

Abstract: Novel tough composite hydrogels were prepared from inorganic bentonite(IB), polyvinyl alcohol(PVA) and polyethylene glycol(PEG) by means of a freeze-thaw technique, during which IB acted as multifunctional physically crosslinking junction and a filler to bridge the 3D network hydrogel; while the physical adsorption between IB and the polymer chains served as sacrificial bonds and increased the energy dissipation efficiency. The effects of different content of IB(w_IB) on the morphological, thermal, swelling, and mechanical properties of the hydrogels were investigated. It was found that the added IB promoted the material crosslinking and stability, and the mechanical properties of the hydrogels were significantly improved with increasing w_IB. The highest tensile stress of the hydrogel was achieved(1.1 MPa) when w_IBwas 5%. The synthesized hydrogels with high mechanical strength and low friction coefficient are potential candidate materials for artificial cartilage.

Key words: Bentonite, Polyvinyl alcohol, Polyethylene glycol, Freeze-thaw, Hydrogel

LU Xueting, FENG Wei, WANG Honglei, HU Qianqian, GUAN Shuang, GUO Peipei. Bentonite Reinforced Tough Composite Hydrogels as Potential Artificial Articular Cartilage[J]. Chemical Research in Chinese Universities, 2018, 34(6): 1028-1034.

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