Journal
POLYMER TESTING
Volume 108, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2022.107516
Keywords
Hydrogel; Strength; Toughness; Dual-crosslinking
Funding
- National Natural Science Foundation of China [52073086]
- Key Research and Development Plan of Hunan Province [2020SK2110]
- Intergovernmental Cooperation Project in International Science and Technology Innovation [2021YFE0191500]
- Science Research Project of Hunan Provincial Department of Education [19C0550]
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PVA hydrogels with high strength and toughness can be fabricated through dual physical and chemical cross-linking. The best mechanical properties are achieved by reacting at room temperature and subsequently undergoing freeze-thaw and annealing treatment. Additionally, the mechanical properties of PVA hydrogel increase and then decrease with the increase of molecular weight or mass fraction. By changing the reaction solvent, the mechanical properties of PVA hydrogel can be effectively adjusted.
PVA hydrogels with high strength and toughness are fabricated by dual physical and chemical cross-linking. The best comprehensive mechanical properties can be achieved by reaction at room temperature followed with freeze-thaw and annealing treatment. Besides, the mechanical properties of PVA hydrogel increased first and then decreased with the increase of molecular weight or mass fraction. By changing the reaction solvent, the mechanical properties of PVA hydrogel could also be effectively adjusted. Therefore, the influences of various factors on the mechanical properties of PVA hydrogel can be obtained.
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