Method for synthesizing starch acetate
A technology of starch acetate and synthesis method, which is applied in the field of food biochemical industry, can solve the problems of high reaction temperature, achieve high reaction efficiency, mild conditions, and increase the cost
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Embodiment 1
[0029] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.
[0030] (2) Esterification Add 90ml of water to the treated starch to prepare 40% starch milk, then add 0.36g of lipase, heat to a constant temperature of 30°C, add 5% acetic anhydride, and stir in a water bath at a constant temperature of 30°C for 10 minutes , the stirring speed was 150rpm to obtain starch acetate, and the degree of substitution of starch acetate reached 0.0302 after determination.
Embodiment 2
[0032] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.
[0033] (2) Esterification Add 90ml of water to the treated starch to make 40% starch milk, then add 0.54g of lipase, heat to 40°C constant temperature, add 9% acetic anhydride, stir in 40°C constant temperature water bath for 10min , the stirring speed was 150rpm to obtain starch acetate, and the degree of substitution of starch acetate reached 0.0426 after determination.
Embodiment 3
[0035] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.
[0036] (2) Esterification Add 90ml of water to the treated starch to prepare 40% starch milk, then add 0.36g of lipase, heat to a constant temperature of 35°C, add 9% of acetic anhydride, stir in a constant temperature water bath at 35°C for 15 minutes , the stirring speed was 150rpm, and starch acetate was obtained, and the degree of substitution of starch acetate reached 0.0733.
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