A kind of organic polymer modified polysaccharide hydrogel protective film and its preparation method and application
A hydrogel protective film, polymer technology, applied in antifouling/underwater coatings, biocide-containing paints, coatings, etc., can solve the problems of poor stability, affect the appearance, poor repeatability of material properties, etc. The effect of stability
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Embodiment 1
[0031] An organic polymer blended modified polysaccharide hydrogel is a mixed aqueous solution of locust bean gum, xanthan gum and polyvinyl alcohol (molecular weight 400), wherein the mass ratio of locust bean gum to xanthan gum is 3:1, and the polysaccharide ( The mass ratio of locust bean gum and xanthan gum) to polyvinyl alcohol is 1:5, and the concentration of polysaccharide in the mixed aqueous solution is 0.3%.
[0032] The preparation method of the above-mentioned organic polymer blending modified polysaccharide hydrogel, the specific steps are as follows:
[0033] (1) Select the polysaccharide locust bean gum and xanthan gum at a mass ratio of 3:1 to prepare a 100ml aqueous solution with a total polysaccharide concentration of 0.3%, and stir it evenly at 90°C;
[0034] (2) At 85°C, prepare a polyvinyl alcohol aqueous solution with a mass fraction of 8%, and then add it to the aqueous solution obtained in step (1) (the mass ratio of the total amount of polysaccharide t...
Embodiment 2
[0037]An organic polymer blended modified polysaccharide hydrogel is a mixed aqueous solution of locust bean gum, xanthan gum and polyvinyl alcohol (molecular weight 400), wherein the mass ratio of locust bean gum to xanthan gum is 3:1, and the polysaccharide ( The mass ratio of the sum of locust bean gum and xanthan gum) to polyvinyl alcohol is 1:5, and the concentration of polysaccharide in the mixed aqueous solution is 2%.
[0038] The preparation method of the above-mentioned organic polymer blending modified polysaccharide hydrogel, the specific steps are as follows:
[0039] (1) Select the polysaccharide locust bean gum and xanthan gum with a mass ratio of 3:1 to prepare a 100ml aqueous solution with a total polysaccharide concentration of 2%, and stir it evenly at 90°C;
[0040] (2) At 85°C, prepare a polyvinyl alcohol aqueous solution with a mass fraction of 8%, and then add it to the aqueous solution obtained in step (1) (the mass ratio of the total amount of polysacc...
Embodiment 3
[0043] A kind of organic polymer crosslinking modified polysaccharide hydrogel, concrete steps are as follows:
[0044] (1) According to the mass ratio of 3:1, select the polysaccharide locust bean gum and xanthan gum with a mass ratio of 3:1, prepare a 100ml aqueous solution with a total concentration of polysaccharide of 1%, stir it evenly at 90°C, and slowly add 3g of malondialdehyde, Continue heating for 3h, the first network structure hydrogel solution of polysaccharides and aldehyde organic matter;
[0045] (2) In an ice-water bath, neutralize 5 g of acrylic acid monomer with 25% NaOH solution, add 5 g of comonomer acrylamide, then mix and stir with the aqueous solution of step (2);
[0046] (3) At 70°C, add 1% initiator ammonium persulfate and 0.1% cross-linking agent N,N'-methylenebisacrylamide to the aqueous solution of step (2), react for 3 hours, and The resulting solution was kept at 4° C. for 18 hours, and the organic polymer cross-linked modified polysaccharide ...
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