Self-healing polyvinyl alcohol-alginate double-network gel and preparation method thereof
A technology of polyvinyl alcohol and alginate, applied in the field of gel research, can solve the problems of easy pollution, high toxicity, unfavorable biomedical fields, etc., and achieve the effect of easy promotion, good mechanical properties and adsorption capacity, and simple process
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Embodiment 1
[0026] In this example, a self-healing polyvinyl alcohol-alginate double network gel is prepared by the following steps:
[0027] Take 4 beakers, respectively numbered 1, 2, 3 and 4, and add 8g of polyvinyl alcohol, 2g of sodium alginate, 4g of polyvinyl alcohol, 2g of sodium alginate, 2g of polyvinyl alcohol, and sodium alginate to each beaker. 4g, polyvinyl alcohol 2g, sodium alginate 8g, all added to 100mL of deionized water. A homogeneous mixed solution was prepared by mechanical stirring and ultrasonication.
[0028] The prepared mixed solution was poured into the mold respectively, put into the refrigerator and frozen at -20°C for 22 hours, took it out and thawed at room temperature for 2 hours, thawed and then refrigerated, repeated 3 cycles, so that the polyvinyl alcohol was cross-linked to form a gel, The polyvinyl alcohol-sodium alginate single network gels numbered 1-4 were obtained.
[0029] Take another 4 beakers and prepare 10mg / mL CaCl 2 solution, the polyvin...
Embodiment 2
[0035] In this example, a self-healing polyvinyl alcohol-alginate double network gel with high strength and high adsorption performance is prepared by the following steps:
[0036]Take 4 beakers, respectively numbered 5 to 8, and add 8g of polyvinyl alcohol, 2g of sodium alginate, 4g of polyvinyl alcohol, 2g of sodium alginate, 2g of polyvinyl alcohol, 4g of sodium alginate, polyethylene 2 g of alcohol and 8 g of sodium alginate were added to 100 mL of deionized water. A homogeneous mixed solution was prepared by mechanical stirring and ultrasonication.
[0037] The prepared mixed solutions were poured into the molds respectively, put into the refrigerator and frozen at -60°C for 12 hours, took out and thawed at room temperature for 2 hours, thawed and then refrigerated, and repeated 3 cycles to make the polyvinyl alcohol cross-linked to form a gel. Polyvinyl alcohol-sodium alginate single network gels numbered 5-8 were obtained.
[0038] Take another 4 beakers and prepare 1...
Embodiment 3
[0041] In this example, a self-healing polyvinyl alcohol-alginate double network gel with high strength and high adsorption performance is prepared by the following steps:
[0042] Take 4 beakers, numbered 9-12 respectively, add 8g of polyvinyl alcohol, 2g of sodium alginate, 4g of polyvinyl alcohol, 2g of sodium alginate, 2g of polyvinyl alcohol, 4g of sodium alginate, polyethylene 2 g of alcohol and 8 g of sodium alginate were added to 100 mL of deionized water. A homogeneous mixed solution was prepared by mechanical stirring and ultrasonication.
[0043] The prepared mixed solutions were poured into the molds respectively, put into the refrigerator and frozen at -60°C for 12 hours, took out and thawed at room temperature for 2 hours, thawed and then refrigerated, and repeated 3 cycles to make the polyvinyl alcohol cross-linked to form a gel. Obtain polyvinyl alcohol-sodium alginate single network gels numbered 9-12;
[0044] Take another 4 sets of beakers and prepare 10mg...
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