Thermo-Moldable Nanocomposite Hydrogels
Yiqing Yang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorCorresponding Author
Tao Wang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorWeixiang Sun
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorChaoyang Wang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorXinxing Liu
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorCorresponding Author
Zhen Tong
- [email protected]
- | Fax: (86)-20-87110273
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorYiqing Yang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorCorresponding Author
Tao Wang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorWeixiang Sun
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorChaoyang Wang
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorXinxing Liu
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorCorresponding Author
Zhen Tong
- [email protected]
- | Fax: (86)-20-87110273
Research Institute of Materials Science, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640 China
Search for more papers by this authorAbstract
The present paper reports an interesting and versatile thermo-moldable property of poly(N,N-dimethylacrylamide)-clay nanocomposite hydrogels (NC gel). The NC gel can be thermo-pressed and molded to a desired shape at 80 °C, and the shape can be fixed by cooling to 20 °C. Mechanical test and small-angle X-ray scattering demonstrate that the molded NC gel still exhibits high strength with an elastic network structure. Viscoelastic measurements show that with increasing the temperature, the equilibrium shear modulus Ge decreases, and the creep and permanent deformation increases obviously, suggesting a decrease in the cross-linking density. Ge recovers when the gel is cooled down to room temperature, reflecting the recovery of the cross-linking density. This thermo-moldable property is attributed to reversible cross-linking in such NC gels by changing the temperature. This work provides a facile method to deform or pattern the tough NC gels after synthesis.
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