A kind of natural polymer water-absorbing material and preparation method thereof
A technology of natural polymer and water-absorbing material, which is applied in the field of high-strength natural polymer water-absorbing material to achieve the effect of high safety, good water retention and high strength
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Embodiment 1
[0020] Soak 3 parts of Gracilaria in 10 wt% NaOH solution at 85°C for 4 hours, wash with water until neutral, boil in water at 90°C for 3 hours, extract and filter to obtain Gracilaria polysaccharides, and dry the obtained Gracilaria polysaccharides , alcohol washing and crushing and passing through a 20-mesh sieve for later use. Dissolve 6 parts of sodium alginate in 95.5 parts of water, add Gracilaria polysaccharide, stir evenly, drop 10 parts of calcium chloride solution with a concentration of 10 wt% into a syringe to gel, the gel time is 0.05 hours, and then dry the product Promptly get the natural polymer water-absorbing material. The weight of the water-absorbing material obtained by this method is 46 times of its own dry weight after absorbing water, and 31 times of its own dry weight after absorbing 0.9 wt% saline, and the tensile strength of the material after absorbing water is 0.13 MPa, which has good Excellent water retention, the water retention can reach 83% wi...
Embodiment 2
[0022] Soak 0.2 parts of Gracilaria in 2 wt% NaOH solution at 60°C for 8 hours, wash with water until neutral, boil in water at 80°C for 8 hours, extract and filter to obtain Gracilaria polysaccharides, and dry the obtained Gracilaria polysaccharides , alcohol washing and crushing and passing through a 20-mesh sieve for later use. Dissolve 0.2 parts of sodium alginate in 70 parts of water, add Gracilaria polysaccharide, stir evenly, drop 20 parts of calcium chloride solution with a concentration of 0.2wt% into the gel with a syringe, the gel time is 6 hours, and then dry the product Promptly get the natural polymer water-absorbing material. The weight of the water-absorbing material obtained by this method is 45 times of its own dry weight after absorbing water, and 32.5 times of its own dry weight after absorbing 0.9 wt% normal saline, and the tensile strength of the material after water absorption is 0.16 MPa, which has good Excellent water retention, the water retention ca...
Embodiment 3
[0024] Soak 6 parts of Gracilaria in 20 wt% NaOH solution at 70°C for 0.5 hours, wash with water until neutral, boil in water at 100°C for 1 hour, extract and filter to obtain Gracilaria polysaccharides, and the obtained Gracilaria polysaccharides are dried , alcohol washing and crushing and passing through a 20-mesh sieve for later use. Dissolve 3 parts of sodium alginate in 85 parts of water, add Gracilaria polysaccharide, stir evenly, drop 0.2 parts of 20wt% calcium chloride solution into the gel with a syringe, the gel time is 3 hours, and then dry the product Obtain natural polymer water-absorbing materials. The weight of the water-absorbing material obtained by this method is 46.5 times of its own dry weight after absorbing water, and 33 times of its own dry weight after absorbing 0.9 wt% saline, and the tensile strength of the material after absorbing water is 0.2 MPa, which has good Excellent water retention, the water retention can reach 85% within half an hour.
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Abstract
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