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Modified hydrogel of pineapple pomace fiber grafted with soybean protein and its preparation method and application

A technology of pineapple peel residue and fiber grafting, which is applied in the fields of medical science, absorbent pads, non-active components of polymer compounds, etc., can solve the problems of insufficient toughness, side reactions, and easy breakage of the glue, and achieve smooth surface and water retention Strong performance and low water permeability

Inactive Publication Date: 2018-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Cellulose can be dissolved in ionic liquid at slightly higher than room temperature to form a cellulose solution; but the formed glue is not tough enough and easy to break
However, the protein cannot form a gel under the ionic liquid system, and the protein itself undergoes some side reactions under heating conditions.

Method used

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  • Modified hydrogel of pineapple pomace fiber grafted with soybean protein and its preparation method and application
  • Modified hydrogel of pineapple pomace fiber grafted with soybean protein and its preparation method and application
  • Modified hydrogel of pineapple pomace fiber grafted with soybean protein and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Extract pineapple pomace cellulose:

[0039] (1-1) Wash the pineapple skin residue to remove the soil residue, add a small amount of water and use a beater to crush and filter initially, elute the water-soluble components such as sugar and pigment, dry the residue in an oven at 50°C for 16 hours, and use a high-speed pulverizer Pulverize further, cross 80 mesh sieves, obtain pineapple peel fibril (RPPF);

[0040] (1-2) Add RPPF to distilled water (the mass volume ratio of distilled water of pineapple skin fibrils is 1g: 20mL), shake on a shaker at 80°C (speed 120r / min) for 2 hours, and use glacial acetic acid with a mass fraction of 13%. Adjust the pH to 3.8, filter, and treat the filter residue with sodium chlorite solution (mass fraction: 7.5%, the mass ratio of leather fibrils and sodium chlorite: 1:2.5) at 75°C for 2 hours, filter, and wash with distilled water for 3 times. After the filtrate was clear in color, it was washed twice with ethanol (95% by volume),...

Embodiment 2

[0048] (1) Extract pineapple pomace cellulose:

[0049] (1-1) Wash the pineapple skin residue to remove the soil residue, add a small amount of water and use a beater to crush and filter initially, elute the water-soluble components such as sugar and pigment, dry the residue in an oven at 50°C for 16 hours, and use a high-speed pulverizer Pulverize further, cross 80 mesh sieves, obtain pineapple peel fibril (RPPF);

[0050] (1-2) Add RPPF to distilled water (the mass volume ratio of distilled water of pineapple skin fibrils is 1g: 15mL), shake the shaker at 80°C (speed 120r / min) for 2h, and use glacial acetic acid with a mass fraction of 13%. Adjust the pH to 3.9, filter, and treat the filter residue with sodium chlorite solution (mass fraction is 7.5%, the mass ratio of skin fibrils and sodium chlorite is 1:2.5) at 75°C for 2 hours, filter, and wash the filter residue with distilled water for 3 hours. After the filtrate was clear in color, it was washed twice with ethanol (9...

Embodiment 3

[0058] (1) Extract pineapple pomace cellulose:

[0059] (1-1) Wash the pineapple skin residue to remove the soil residue, add a small amount of water and use a beater to crush and filter initially, elute the water-soluble components such as sugar and pigment, dry the residue in an oven at 50°C for 16 hours, and use a high-speed pulverizer Pulverize further, cross 80 mesh sieves, obtain pineapple peel fibril (RPPF);

[0060] (1-2) Add RPPF to distilled water (the mass volume ratio of distilled water of pineapple skin fibrils is 1g: 15mL), shake the shaker at 80°C (speed 120r / min) for 2h, and use glacial acetic acid with a mass fraction of 13%. Adjust the pH to 3.8, filter, and treat the filter residue with sodium chlorite solution (mass fraction is 7.5%, the mass ratio of skin fibrils and sodium chlorite is 1:2.5) at 75°C for 2 hours, filter, and wash the filter residue with distilled water for 3 hours. After the filtrate was clear in color, it was washed twice with ethanol (9...

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Abstract

The invention belongs to the technical field of composite hydrogel, and discloses a modified hydrogel grafted with soybean protein by pineapple skin residue fiber, as well as its preparation method and application. The present invention extracts cellulose through pineapple pomace, then uses soybeans to separate out protein, then adds pineapple pomace cellulose and soybean protein isolate into a reaction vessel, oscillates and mixes evenly, then quickly adds ionic liquid, stirs and mixes, and seals to form Gel reaction, cooling, adding isopropanol aqueous solution for soaking, pouring off the soaking solution, adding distilled water to continue soaking, changing the water until the soaking solution does not contain ionic liquid, pre-freezing, vacuum freeze-drying, and obtaining a modified hydrogel. The modified hydrogel of the present invention forms a dense three-dimensional network structure due to the reaction of cellulose and soybean protein. The performance is strong, and the performance in terms of texture is superior, and it has potential applications in wound dressings and other aspects.

Description

technical field [0001] The invention belongs to the technical field of composite hydrogels, and in particular relates to a modified hydrogel of pineapple pomace fiber grafted with soybean protein and its preparation method and application. Background technique [0002] Pineapple is a typical tropical fruit with characteristic flavor, which is widely planted in tropical regions. Most pineapple is processed into canned and preserved fruit, but its pomace accounts for 30-50% of the weight of the whole fruit. If it can be used well, it can not only achieve the purpose of high value, but also effectively solve the problem of annual processing of canned pineapple. The problem of environmental pollution caused by a large number of discarded peels. Therefore, the development of high-value deep processing and comprehensive utilization of pineapple by-products is an effective entry point to solve the problems in the current pineapple industry chain. Pineapple pomace is mainly compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L1/02C08L89/00A61L15/32A61L15/28A61L15/42A61K47/42A61K47/38B01D71/78
Inventor 黄惠华周萌周端
Owner SOUTH CHINA UNIV OF TECH
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