TY - JOUR
T1 - Tough bonding of hydrogels to diverse non-porous surfaces
AU - Yuk, Hyunwoo
AU - Zhang, Teng
AU - Lin, Shaoting
AU - Parada, German Alberto
AU - Zhao, Xuanhe
N1 - Funding Information:
The authors thank A. Wang and L. Griffith for their help on the cell viability test. This work is supported by ONR (No. N00014-14-1-0528), MIT Institute for Soldier Nanotechnologies and NSF (No. CMMI-1253495). H.Y. acknowledges the financial support from Samsung Scholarship. X.Z. acknowledges the supports from NIH (No. UH3TR000505) and MIT Materials Research Science and Engineering Center.
Publisher Copyright:
© 2016 Macmillan Publishers Limited. All rights reserved.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - 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.
AB - 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.
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U2 - 10.1038/nmat4463
DO - 10.1038/nmat4463
M3 - Article
C2 - 26552058
AN - SCOPUS:84955662660
SN - 1476-1122
VL - 15
SP - 190
EP - 196
JO - Nature Materials
JF - Nature Materials
IS - 2
ER -