Edible fluid sericin fresh-keeping film and preparation process
A fresh-keeping film and liquid technology, which is applied in the field of fresh-keeping film, edible liquid sericin fresh-keeping film and its preparation technology, can solve problems such as less research, prolong storage period and shelf life, inhibit microbial invasion, and control water loss. Effect
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[0015] A preparation process of edible liquid sericin fresh-keeping film, comprising the following steps in turn:
[0016] a) Preparation of sericin solution: first dewax silkworm cocoons with fatty acid sodium dilute alkali solution, then cut silkworm cocoons into 0.5cm 2 After the solution is cooled, add polypropylene glycol, filter to remove the silk fibroin components, then add it to the concentrator, heat To 60~85℃, vacuum concentration to remove 45~55% water;
[0017] b) Matrix preparation: take polyvinyl alcohol: 5-8 parts, glycerin: 1-2 parts, sodium benzoate: 0.6-0.9 parts, carboxymethyl cellulose: 1-2 parts, sodium alginate: 1-2 parts, water : 85-90 parts, when the temperature is controlled at 25-35 ℃, soak for 4-8 hours, then heat to 70-80 ℃ and stir evenly, cool and defoaming for later use;
[0018] c) Preparation of liquid preservative film: take 10-15 parts of sericin protein solution and 85-90 parts of matrix, stir evenly again, and quantitatively pack to obta...
Embodiment 1
[0021] A preparation process of edible liquid sericin fresh-keeping film, comprising the following steps in turn:
[0022] a) Preparation of sericin solution: first dewax silkworm cocoons with fatty acid sodium dilute alkali solution, then cut silkworm cocoons into 0.5cm 2 After the solution is cooled, add 5% polypropylene glycol, filter to remove the silk fibroin components, and then add it to the concentrator, Heating to 60~85℃, vacuum concentration to remove 50% water;
[0023] b) Matrix preparation: take polyvinyl alcohol: 5 parts, glycerin: 1 part, sodium benzoate: 0.6 part, carboxymethyl cellulose: 1 part, sodium alginate: 1 part, water: 91.4 parts, and control the temperature at 25 ~35℃, soak for 6 hours, then heat to 70℃ and stir evenly, cool and defoaming for later use;
[0024] c) Preparation of liquid preservative film: take 10 parts of sericin protein solution and 90 parts of matrix, stir evenly again, quantitatively pack to obtain the finished liquid preservativ...
Embodiment 2
[0026] A preparation process of edible liquid sericin fresh-keeping film, comprising the following steps in turn:
[0027] a) Preparation of sericin solution: first dewax silkworm cocoons with fatty acid sodium dilute alkali solution, then cut silkworm cocoons into 0.5cm 2 After the solution is cooled, add 8% polypropylene glycol, filter to remove the silk fibroin components, and then add it to the concentrator, Heating to 60~85℃, vacuum concentration to remove 50% water;
[0028] b) Matrix preparation: take polyvinyl alcohol: 6 parts, glycerin: 1.5 parts, sodium benzoate: 0.7 parts, carboxymethyl cellulose: 1.5 parts, sodium alginate: 1.5 parts, water: 88.8 parts, control the temperature at 25 ~35℃, soak for 8 hours, then heat to 80℃ and stir evenly, cool and defoaming for later use;
[0029] c) Preparation of liquid preservative film: Take 13 parts of sericin protein solution and 87 parts of matrix, stir evenly again, and quantitatively pack to obtain the finished liquid p...
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