期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 163, 期 -, 页码 81-88出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.05.011
关键词
Mechanical properties; Nano composites; Double network hydrogels; Polymer-matrix composites (PMCs)
资金
- National Nature Science Foundation of China [21504022]
- Joint Fund for Fostering Talents of NSFC-Henan Province [U1304516]
- Henan Province [NSFRF1605, 2016GGJS-039, 17HASTIT006]
- Henan Polytechnic University [72105/001, 672517/005]
Gelatin/polyacrylamide/graphene oxide nanocomposite double-network hydrogels (Gelatin/PAAm/GO NC-DN gels) were prepared by in situ free radical polymerization. Their structure and properties were systematically characterized by X-ray diffraction (XRD), Raman spectroscopy, swelling experiments, scanning electron microscopy (SEM) and tensile tests. The results reveal that the GO nanosheets are significantly exfoliated in the gel matrix, serving as multi-functional cross-linkers in the NC-DN gels. At an optimal condition, Gelatin/PAAm/GO NC-DN gel demonstrates an excellent mechanical properties of an elastic modulus (E) of 187.3 kPa, a fractured stress (sigma(f)) of 0.324 MPa), a fractured strain (epsilon(f)) of 45.5 mm/mm and a fractured energy (W) of 10.18 MJ/m(3). More interestingly, the gels show a large hysteresis loop, softening phenomenon and self-recovery properties. This work deepens the understandings of the effect of nanomaterials on the mechanical properties of DN gels.
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