Preparation method of high-performance grafted starch
A high-performance, starch technology, applied in the polymer field, to achieve the effect of improving the performance and application range
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Embodiment 1
[0042]Add 100mL of acetone to 100mL of phosphate buffer (0.1mol / L, pH=7.5), mix the solution and separate layers, take the acetone containing phosphate in the upper layer and add 50g of diatomaceous earth. min in a shaker for 1 h, filtered and dried at 100°C for 8 h to obtain immobilized phosphate.
[0043] Add 10g of absolute dry cornstarch, 20g of ethylene glycol diacrylate and 30g of the catalyst prepared above into 500mL of dimethyl sulfoxide, react in a constant temperature shaker at 50°C and 200r / min for 24h, add ethanol to precipitate and obtain Vinyl-containing starch monoester products. Dissolve 10g of acrylamide monomer in 500mL of water, add 10g of vinyl-containing corn starch monoester product, then add 1mL of acetylacetone, 0.1mL of H 2 o 2 And 100U of HRP, after reacting for 12h, add ethanol to precipitate to obtain the product of starch grafted acrylamide. The grafting rate was 51.1%.
Embodiment 2
[0045] Add 100mL of acetone to 100mL of phosphate buffer (0.1mol / L, pH=7.5), mix the solution and separate layers, take the acetone containing phosphate in the upper layer and add 50g of diatomaceous earth. min in a shaker for 1 h, filtered and dried at 100°C for 8 h to obtain immobilized phosphate.
[0046] Add 5g of absolute dry potato starch, 15g of ethylene glycol diacrylate and 20g of the catalyst prepared above into 500mL of dimethyl sulfoxide, react in a constant temperature shaker at 50°C and 200r / min for 12h, add ethanol to precipitate and obtain Vinyl-containing starch monoester products. Dissolve 10g of acrylamide monomer in 500mL of water, add 10g of vinyl-containing potato starch monoester product, then add 1mL of acetylacetone, 0.1mL of H 2 o 2 And 200U of HRP, after reacting for 12h, add ethanol to precipitate to obtain the product of starch grafted acrylamide. The grafting rate was 54.6%.
Embodiment 3
[0048] Add 100mL of acetone to 100mL of phosphate buffer (0.1mol / L, pH=7.5), mix the solution and separate layers, take the acetone containing phosphate in the upper layer and add 50g of diatomaceous earth. min in a shaker for 1 h, filtered and dried at 100°C for 8 h to obtain immobilized phosphate.
[0049] Add 5g of absolute-dried tapioca starch, 15g of ethylene glycol diacrylate and 20g of the catalyst prepared above into 500mL of dimethyl sulfoxide, react in a constant temperature shaker at 50°C and 200r / min for 24h, add ethanol to precipitate and obtain Vinyl-containing starch monoester products. Dissolve 10g of acrylamide monomer in 500mL of water, add 10g of vinyl-containing tapioca monoester product, then add 2mL of acetylacetone, 0.2mL of H 2 o 2 And 300U of HRP, after reacting for 6h, add ethanol to precipitate to obtain the product of starch grafted acrylamide. The grafting rate was 59.3%.
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Abstract
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