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Preparation method and product of fish skin gelatin

A technology for fish skin gelatin and fish skin is applied in the preparation of animal glue or gelatin, animal protein processing and other directions, which can solve the problems of environmental pollution, covalent bond breakage, complicated steps, etc., achieves low equipment requirements, reduces environmental pressure, simple craftsmanship

Active Publication Date: 2019-02-12
SOUTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali treatment refers to the method of soaking raw materials with lime milk or alkaline solution. It is generally used in gelatin production. It has the advantages of high quality gelatin production, but has the disadvantages of long time consumption and low production efficiency. It is generally suitable for low crosslinking degree. high collagen
Although the process of acid treatment and alkali treatment is simple, they are easy to cause pollution to the environment.
In addition, excessive acid-base action can also lead to abnormal breakage of the covalent bonds of collagen molecules, destroying the integrity of collagen subunits, and thus affecting the quality of finished gelatin
Enzyme method refers to the method of using enzymes to dissolve collagen and convert it into gelatin through heat denaturation. Compared with traditional chemical methods, enzymatic method has the advantages of short production cycle, high yield, high purity, narrow relative molecular weight distribution, energy consumption and Environmental pollution is small, etc., but the process requires multi-step separation and extraction, the steps are cumbersome and biological enzymes are used as consumables, and the production cost is too high
[0004] At present, the main source of gelatin is still mammals, such as pigskin, cowhide and ox bone etc., but the gelatin of this source faces bovine spongiform encephalopathy (BSE), the problem of foot-and-mouth disease (FMD) and religious belief, therefore, is badly in need of a kind of can A gelatin production method that overcomes problems such as low production efficiency, serious acid-base pollution, and diseases and religious beliefs faced by mammalian gelatin in the gelatin production process

Method used

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  • Preparation method and product of fish skin gelatin

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Prepare Fish Skin Gelatin

[0030] (1) Pre-treatment: 25g of fish skin is cleaned and descaled, and the epidermal fat is scraped off, then cut into small pieces of 4×4mm for later use;

[0031] (2) Degreasing: according to the ratio of material to liquid 1:2, the fish skin treated in step (1) is added into the aqueous solution of sodium dodecylbenzenesulfonate with a mass fraction of 0.75%. Ultrasound for 1.5h under the condition of 120W, the unit of solid-liquid ratio is g:mL;

[0032] (3) Cleaning and draining: the fish skin treated in step (2) is cleaned with deionized water to completely remove the residual sodium dodecylbenzene sulfonate on the fish skin;

[0033] (4) Microwave pretreatment: Add the fish skin treated in step (3) into water according to the ratio of solid to liquid at 1:6, and then treat it with microwaves for 15 minutes at a temperature of 55°C and a microwave power of 350W. The unit is g:mL;

[0034] (5) Liquid nitrogen quick freezing: adding l...

Embodiment 2

[0040] Prepare Fish Skin Gelatin

[0041] (1) Pre-treatment: 25g fish skin is cleaned and descaled, then scraped off the epidermal fat, and then cut into small pieces of 4×4mm for later use;

[0042] (2) Degreasing: Add the fish skin treated in step (1) into the aqueous solution of sodium dodecylbenzenesulfonate with a mass fraction of 1% according to the ratio of material to liquid at 1:3. Ultrasound for 2 hours under the condition of 180W, the unit of solid-liquid ratio is g:mL;

[0043] (3) Cleaning and draining: the fish skin treated in step (2) is cleaned with deionized water to completely remove the residual sodium dodecylbenzene sulfonate on the fish skin;

[0044] (4) Microwave pretreatment: Add the fish skin treated in step (3) into water according to the material-to-liquid ratio of 1:3, and then microwave it for 20 minutes at a temperature of 60°C and a microwave power of 370W. The unit is g:mL;

[0045] (5) Liquid nitrogen quick-freezing: adding liquid nitrogen t...

Embodiment 3

[0051] Prepare Fish Skin Gelatin

[0052] (1) Pre-treatment: 25g of fish skin is cleaned and descaled, and the epidermal fat is scraped off, then cut into small pieces of 4×4mm for later use;

[0053] (2) Degreasing: add the fish skin treated in step (1) into the aqueous solution of sodium dodecylbenzenesulfonate with a mass fraction of 1.25% according to the ratio of material to liquid at 1:2.5. Ultrasound for 1.5h under the condition of 260W, the unit of solid-liquid ratio is g:mL;

[0054] (3) Cleaning and draining: the fish skin treated in step (2) is cleaned with deionized water to completely remove the residual sodium dodecylbenzene sulfonate on the fish skin;

[0055] (4) Microwave pretreatment: Add the fish skin treated in step (3) into water according to the ratio of solid to liquid at 1:5, and then treat it with microwave for 10 min at a temperature of 57°C and a microwave power of 400W. The unit is g:mL;

[0056] (5) Liquid nitrogen quick freezing: adding liquid ...

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Abstract

The invention relates to a preparation method and product of fish skin gelatin, and belongs to the technical field of biological extraction. The preparation method comprises nine processes of pretreatment, degreasing, washing and draining, microwave pretreatment, liquid nitrogen quick freezing, rapid thawing, gelatin extraction, filtration and drying. In the preparation method, the microwave pretreatment and the liquid nitrogen rapid freezing and thawing are combined to induce gelatinization of fish skin, and after a fish skin raw material is gelatinized, hot water can be used for gelatin extraction only by water thawing. Compared with traditional acid and alkali processes, the preparation method is not treated with any acid or alkali, the degree of pollution to the environment is almost zero, and the environmental pressure of gelatin production can be greatly reduced; and the method is simple in process, easy to operate, low in equipment requirements and suitable for industrial production. The fish skin gelatin produced by the preparation method is a light yellow transparent sheet-shaped object, the gelatin yield reaches as high as 16-18% (g / g wet basis materials), and the physical and chemical properties all meet the standard of GB 6783-2013 (food additive gelatin).

Description

technical field [0001] The invention belongs to the technical field of biological extraction, and in particular relates to a preparation method and product of fish skin gelatin. Background technique [0002] The raw materials for the production of gelatin can only meet the requirements of gelatin extraction after pretreatment and gelatinization. The role of collagen gelatinization is to destroy the non-covalent bonds and covalent cross-links that maintain and stabilize the advanced structure of collagen, loosen the triple helical structure of collagen, and destroy the non-helical crystallization region, so as to facilitate the release of subunit molecules during the gel extraction process. The gel extraction process is to further destroy non-covalent bonds such as hydrogen bonds and some covalent bonds through heat treatment, so that the collagen triple helix structure is disintegrated, the subunit molecules are fully dispersed into the solution, and then dried to obtain gel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09H3/00C09H1/00A23J3/06
CPCA23J3/06C09H1/00C09H3/00
Inventor 张宇昊刘廷薇马良
Owner SOUTHWEST UNIV
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