Method for producing porous starch and its application
A technology of porous starch and production method, applied in the field of biological modified starch, can solve the problems of unoptimistic application prospect, limited adsorption capacity, incapable of industrialized production, etc., and achieve the effects of superior adsorption performance, huge application potential, and reduced preparation cost.
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Embodiment 1
[0033] Add 1kg of indica rice starch to 1-2L of 0.2mol / L Na with a pH of about 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 24h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.
[0034] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.
Embodiment 2
[0036] Add 1kg of cornstarch to 1-2L of 0.2mol / L Na with a pH of around 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 20h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.
[0037] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.
Embodiment 3
[0039] Add 1kg of tapioca starch to 1-2L of 0.2mol / L Na with a pH of about 4 2 HPO 4 -0.1mol / L citric acid buffer solution, and keep stirring, then add 0.05kg glucoamylase and 0.05kg α-amylase, keep stirring at a constant temperature of 40°C for 24h. Centrifuge to separate the supernatant from the precipitate, wash the precipitate with water, and centrifuge again until the supernatant is neutral. The precipitate is dried by hot air to obtain a porous starch product.
[0040] The supernatant after the reaction is decolorized (by adding 2% activated carbon), concentrated (vacuum degree 0.01Mpa, 80° C.), and glucose syrup with a solid content of ≥80% can be obtained.
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