CN-121970806-A - Healing agent for rhizome fruits and vegetables and preparation method thereof

CN121970806ACN 121970806 ACN121970806 ACN 121970806ACN-121970806-A

Abstract

The invention belongs to the technical field of fruit and vegetable healing agents, and particularly relates to a healing agent for rhizome fruits and vegetables and a preparation method thereof. The healing agent disclosed by the invention takes tannic acid modified sodium alginate as a core film forming base material, is matched with a natural plant source composition, and the plant source active composition and the low-molecular chitosan oligosaccharide are synergistic to resist bacteria and inhibit inflammation, the differentially compounded compound amino acid provides targeted nutrition, the multicomponent synergistic effect can obviously shorten the wound healing time, reduce the rotting rate, is high in safety, can obviously promote wound healing, effectively inhibit pathogen infection, is suitable for various rhizome fruits and vegetables, and is simple in preparation process, low in energy consumption and easy for industrial production. Compared with the defects of poor safety, low healing efficiency, narrow applicability, complex preparation process and the like of the healing agent for the rhizome fruits and vegetables in the prior art, the healing agent prepared by the invention is suitable for various rhizome fruits and vegetables, and the formed protective film has strong stability, good air permeability, can exert a function by long-term adhesion and effectively prolongs the storage period.

Inventors

DAI FANWEI
WANG LING
CHEN DAOYE
LIU XINYU
CHEN FEIPING
CHEN YULONG
QI YINGWEI
YE MINGQIANG

Assignees

广东省农业科学院蚕业与农产品加工研究所

Dates

Publication Date: 20260505
Application Date: 20251219

Claims (9)

1. The healing agent for the rhizome fruits and vegetables is characterized by comprising modified sodium alginate, a plant source active composition, low-molecular chitosan oligosaccharide, compound amino acid, mineral trace elements, food-grade auxiliary agents, vitamins and deionized water.
2. The healing agent for rhizome fruits and vegetables according to claim 1, wherein the modified sodium alginate accounts for 5-12% by mass, the plant source active composition accounts for 4-10% by mass, the low molecular chitosan accounts for 1-4% by mass, the compound amino acid accounts for 1-3% by mass, the mineral trace elements accounts for 0.5-1.5% by mass, the food additive accounts for 1-4% by mass, the vitamin C accounts for 0.3-1% by mass, and the deionized water accounts for 100% by mass.
3. The healing agent for rhizome fruits and vegetables according to claim 1, wherein the preparation method of the modified sodium alginate is characterized in that sodium alginate is dissolved in deionized water to prepare sodium alginate solution with the mass concentration of 5% -8%, propylene oxide with the mass concentration of 3% -5% of sodium alginate and tannic acid with the mass concentration of 1% -2% are added, the mixture is reacted for 2-3 hours under the conditions of 45-55 ℃ and the stirring speed of 200-300r/min, the mixture is cooled to room temperature after the reaction is finished, ethanol is added for precipitation, and the precipitate is dried to constant weight in a vacuum drying oven at the temperature of 40-50 ℃ after the filtration, so that the modified sodium alginate is obtained.
4. The healing agent for rhizome fruits and vegetables according to claim 1, wherein the plant source active composition comprises pseudo-ginseng extract, rosmarinic acid and tea polyphenol, and the compound mass ratio is (2-5): 1-3): 1-2.
5. The healing agent for rhizome type fruits and vegetables according to claim 1, wherein the molecular weight of the chitosan oligosaccharide is 500-2000Da.
6. The healing agent for rhizome fruits and vegetables according to claim 1, wherein the compound amino acid consists of alanine, glycine and glutamic acid in a mass ratio of (2-3): 1-2.
7. The healing agent for rhizome fruits and vegetables according to claim 1, wherein the mineral trace elements include potassium dihydrogen phosphate and calcium chloride in a mass ratio of (0.2-0.8) (0.1-0.5).
8. Healing agent for rhizome fruits and vegetables according to claim 1, wherein the food-grade auxiliary agent comprises one or more of glycerin, sorbitol.
9. A method of preparing a healing agent for rhizome type fruits and vegetables as claimed in any one of claims 1 to 8, comprising the steps of: 1) Preparing modified sodium alginate solution, namely adding modified sodium alginate into deionized water, and stirring and dissolving the modified sodium alginate solution at 50-60 ℃ and a stirring rate of 250-350r/min to obtain modified sodium alginate solution; 2) Adding the plant source active composition into the modified sodium alginate solution in the step 1), and continuously and uniformly stirring to enable the extract to be fully dispersed and dissolved; 3) Sequentially adding low molecular chitosan oligosaccharide, compound amino acid, potassium dihydrogen phosphate and calcium chloride, stirring at 40-50deg.C for 20-30min, and mixing 4) Then adding food-grade auxiliary agent and vitamin C, and continuously stirring for 15-20min at 40-50 ℃ to ensure uniform system; 5) Cooling the mixed solution obtained in the step 4) to room temperature, and filtering through a 100-200-mesh sieve to remove impurities, thereby obtaining the healing agent for rhizome fruits and vegetables.

Description

Healing agent for rhizome fruits and vegetables and preparation method thereof Technical Field The invention belongs to the technical field of fruit and vegetable healing agents, and particularly relates to a healing agent for rhizome fruits and vegetables and a preparation method thereof. Background The rhizome fruits and vegetables are important grain crops and cash crops in China, are rich in nutritional ingredients such as starch, vitamins, minerals and the like, and occupy important positions in national diet structures. In the processes of harvesting, grading, packaging, transporting and storing, skin wounds are very easy to generate due to unavoidable operations such as mechanical collision, friction and the like. The existence of the wound can cause a series of problems that on one hand, the wound breaks the epidermis protection barrier of fruits and vegetables, so that internal moisture is quickly evaporated, the fruits and vegetables wilt and lose weight and the quality is reduced, and on the other hand, the wound provides a channel for invasion of pathogenic bacteria (such as penicillium, gray mold, soft rot bacteria and the like), so that decay and deterioration are easily caused, and a large amount of postpartum loss is caused. According to statistics, the loss rate of the picked rhizome fruits and vegetables in China, which is caused by wound rot, is up to 20% -30%, and the economic benefit of growers and the sustainable development of industry are seriously affected. In order to solve the above problems, various medicaments for fruit and vegetable wound healing have been developed in the prior art, and are mainly classified into chemical synthesis and natural extraction. Although chemical synthesis healing agents (such as carbendazim, thiophanate methyl and the like) can inhibit the growth of pathogenic bacteria to a certain extent, the chemical synthesis healing agents have residual risks and harm to human health, and the chemical synthesis healing agents are easy to cause drug resistance of the pathogenic bacteria after long-term use, and meanwhile have limited promotion effect on wound healing, so that the problem of slow wound healing is difficult to fundamentally solve. The natural extracted healing agent (such as chitosan, aloe extract and the like) has the advantages of high safety, environmental friendliness and the like, but has the defects of low healing efficiency and short duration, and is mainly applicable to only single-type rhizome fruits and vegetables, so that the requirement of large-scale production is difficult to meet. In addition, the existing preparation method of the healing agent is more complex, a part of the process needs high-temperature and high-pressure conditions, the energy consumption is high, byproducts are easy to generate in the preparation process, and the purity and the effect of the healing agent are affected. Therefore, the root and stem fruit and vegetable healing agent which has the advantages of high safety, high healing efficiency, wide applicability and simple preparation process is developed, and has important significance in reducing postpartum loss, improving product quality and promoting the development of the root and stem fruit and vegetable industry. Disclosure of Invention Aiming at the problems, the invention aims to provide a healing agent for rhizome fruits and vegetables and a preparation method thereof. The technical content of the invention is as follows: the invention provides a healing agent for rhizome fruits and vegetables, which comprises modified sodium alginate, a plant source active composition, low-molecular chitosan oligosaccharide, compound amino acid, mineral trace elements, food-grade auxiliary agents, vitamins and deionized water; According to mass fraction, the modified sodium alginate accounts for 5-12%, the plant source active composition accounts for 4-10%, the low molecular chitosan accounts for 1-4%, the compound amino acid accounts for 1-3%, the mineral trace elements account for 0.5-1.5%, the food additive accounts for 1-4%, the vitamin C accounts for 0.3-1%, and the deionized water accounts for 100%. The preparation method of the modified sodium alginate comprises the steps of dissolving sodium alginate in deionized water to prepare sodium alginate solution with the mass concentration of 5% -8%, adding propylene oxide with the mass concentration of 3% -5% of sodium alginate and tannic acid with the mass concentration of 1% -2% of sodium alginate, reacting for 2-3 hours under the conditions of 45-55 ℃ and stirring speed of 200-300r/min, cooling to room temperature after the reaction is finished, adding ethanol for precipitation (the adding amount of the ethanol is 2-3 times of the volume of the solution), filtering, and then placing the precipitate in a 40-50 ℃ vacuum drying oven for drying until the weight is constant, thus obtaining the modified sodium alginate. Through the synergistic modification treatment of