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| Preparation and Properties of a Novel AG/PVA/CB[7] Hydrogel Reinforced by Microcrystalline and Hydrogen Bonds |
YANG Qin( ), ZHAO Weijie, ZHAO Na, WANG Ruodi, CHEN Cheng |
| School of Chemistry and Chemical Engineering, Xi 'an University of Architecture and Technology, Xi 'an 710055, China |
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Cite this article:
YANG Qin, ZHAO Weijie, ZHAO Na, WANG Ruodi, CHEN Cheng. Preparation and Properties of a Novel AG/PVA/CB[7] Hydrogel Reinforced by Microcrystalline and Hydrogen Bonds. Chinese Journal of Materials Research, 2020, 34(9): 691-696.
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Abstract A novel dual-network hydrogel AG/PVA/CB[7] was prepared with natural polymer agarose (AG) as the first physical crosslinking network, polyvinyl alcohol (PVA) as the second physical crosslinking network, and cucurbituril[7] (CB[7]) as the crosslinking agent. The morphology, structure, crystallinity and crosslinking mode of the AG/PVA/CB[7] hydrogel were characterized by SEM, FT-IR and XRD. The mechanical properties, swelling properties and re-healing properties of the hydrogel were investigated. The results show that the hydrogel presents high strength and re-healing properties. The mechanical properties of the hydrogel may be enhanced by cross-linking the polymer chains with hydrogen bonds and microcrystals. The mechanical properties of the hydrogel were not only increased with the increase of freeze-thaw times but also improved by the addition of crosslinking agent CB[7]. After 5 freeze-thaw cycles, the hydrogel presents tensile strength of 0.37 MPa, young's modulus of 0.23 MPa and equilibrium swelling rate of 140%.
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Received: 13 April 2020
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| Fund: Natural Science Foundation of Shaanxi Province(2019JM-541) |
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