Preparation method of biological film mono non-staple-food composite modified hydrophobic starch
A hydrophobic starch and biofilm technology, applied in the field of modified starch, can solve the problems of poor dispersibility of modified starch, difficult modification process, incomplete starch modification, etc., and achieves strong hydrophobicity, simple preparation method, Mild effect of preparation conditions
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Embodiment 1
[0018] A kind of biofilm single non-staple food compound modified hydrophobic starch preparation method proposed by the present invention comprises the following steps:
[0019] S1. The starch is dried by hot air circulation at 35°C to obtain dry starch with a moisture content of 10%;
[0020] S2, according to the mass ratio of 1:0.3:0.5, the dry starch obtained in step S1 and triglyceride, succinate are jointly added in the grinder, grind three times, each grinding 10min, until mixing evenly;
[0021] S3, according to the mass ratio of 1:4, dissolve the uniformly mixed starch in step S2 in the ethanol solution, add a NaOH solution with a concentration of 20%, adjust the pH to 10, and add hexamethyldisilazide 0.2 times the amount of starch alkane, heated to 70°C, and stirred at a high speed at a speed of 300r / min while heating, and after stirring for 32min, a starch solution was obtained;
[0022] S4, the starch solution obtained in the step S3 utilizes the osmosis of the bio...
Embodiment 2
[0024] A kind of biofilm single non-staple food compound modified hydrophobic starch preparation method proposed by the present invention comprises the following steps:
[0025] S1. The starch is dried by hot air circulation at 45°C to obtain dry starch with a moisture content of 8%;
[0026] S2, according to the mass ratio of 1.2:0.4:0.3, the dry starch obtained in step S1 and triglyceride, succinate are jointly added in the grinder, grind three times, grind 8min each time, until mixing evenly;
[0027] S3, according to the mass ratio of 0.8:4.2, dissolve the uniformly mixed starch in step S2 in the ethanol solution, add a NaOH solution with a concentration of 20%, adjust the pH to 8.8, and add hexamethyldisilazide 0.18 times the amount of starch alkane, heated to 68°C, and stirred at a high speed at a speed of 200r / min while heating, and after stirring for 35min, a starch solution was obtained;
[0028] S4, the starch solution obtained in step S3 utilizes the osmosis of bio...
Embodiment 3
[0030] A kind of biofilm single non-staple food compound modified hydrophobic starch preparation method proposed by the present invention comprises the following steps:
[0031] S1. The starch is dried by hot air circulation at 30°C to obtain dry starch with a moisture content of 2%;
[0032] S2, according to the mass ratio of 1.2:0.25:0.6, the dry starch obtained in step S1 and triglyceride, succinate are jointly added in the grinder, grind three times, grind 12min each time, until mixing evenly;
[0033] S3, according to the mass ratio of 1.2:4, dissolve the uniformly mixed starch in step S2 in the ethanol solution, add a NaOH solution with a concentration of 20%, adjust the pH to 9.2, and add hexamethyldisilazide 0.32 times the amount of starch alkane, heated to 50°C, and stirred at a high speed at a speed of 400r / min while heating, and after stirring for 30min, a starch solution was obtained;
[0034] S4, the starch solution obtained in the step S3 utilizes the osmosis of...
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