Tough bonding of hydrogels to diverse non-porous surfaces.
Tough bonding of hydrogels to diverse non-porous surfaces.
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DOI：
10.1038/nmat4463
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发表时间：
2016-02
期刊：
影响因子：
41.2
通讯作者：
Zhao X
中科院分区：
文献类型：
--
作者：
Yuk H;Zhang T;Lin S;Parada GA;Zhao X
In many animals, the bonding of tendon and cartilage to bone is extremely tough (for example, interfacial toughness ∼800 J m−2; refs ,), yet such tough interfaces have not been achieved between synthetic hydrogels and non-porous surfaces of engineered solids,,,,,,. Here, we report a strategy to design tough transparent and conductive bonding of synthetic hydrogels containing 90% water to non-porous surfaces of diverse solids, including glass, silicon, ceramics, titanium and aluminium. The design strategy is to anchor the long-chain polymer networks of tough hydrogels covalently to non-porous solid surfaces, which can be achieved by the silanation of such surfaces. Compared with physical interactions, the chemical anchorage results in a higher intrinsic work of adhesion and in significant energy dissipation of bulk hydrogel during detachment, which lead to interfacial toughness values over 1,000 J m−2. We also demonstrate applications of robust hydrogel–solid hybrids, including hydrogel superglues, mechanically protective hydrogel coatings, hydrogel joints for robotic structures and robust hydrogel–metal conductors.
