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Vegetable tannin antibacterial agent with body structure as well as preparation method and application thereof

A plant tannin and antibacterial agent technology, applied in botany equipment and methods, plant growth regulators, applications, etc., can solve the problems of difficult use of antibiotics and weak antibacterial ability of natural plant tannins

Active Publication Date: 2021-03-12
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although plant tannins have great potential as inhibitors of pathogenic microorganisms in bullfrogs, it has to be admitted that compared with the commonly used synthetic antibiotics, natural plant tannins have significantly weaker antibacterial ability
Therefore, it is difficult to directly replace antibiotics in bullfrog breeding

Method used

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  • Vegetable tannin antibacterial agent with body structure as well as preparation method and application thereof
  • Vegetable tannin antibacterial agent with body structure as well as preparation method and application thereof
  • Vegetable tannin antibacterial agent with body structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]Example 1 Preparation of plant tannins antibacterial agent

[0044]The preparation method of plant tannins antibacterial agents, including steps: 1) 15 pieces of benzene diphenols, 10 parts of ascorbic acid, and dissolved in 150 parts of methanol, and dissolved in 150 parts of hydrochloric acid, and mixed with 0.5 parts of hydrochloric acid and thoroughly mixed Under the conditions of 25 ° C, the reaction was reacted for 360 minutes, and 0.8 parts of sodium hydroxide was added after the reaction was completed, and the plant tannins degraded product was obtained.

[0045]2) Among the plant tanning degradation products obtained from step 1), 2 of formaldehyde, 10 of the fatty alcohol polyoxyethylene ether-3-sulfosuccinate monode sodium, then transferred to the microwave reactor, in power 600W, treatment under temperature 40 ° C for 120 minutes, and the plant tannins antibacterial product 1 is obtained.

Embodiment 2

[0046]Example 2 Preparation of plant tannins antibacterial agents

[0047]The preparation method of plant tannins antibacterial agents, including the following steps: 1) Add 75 cases of Hysteamine to 100 pieces, 80 copysis, and dissolved in 10 methanol, add 11 sulfuric acid and adequate After mixing, at a temperature of 30 ° C, the reaction was reacted for 360 minutes, and 0.6 parts of potassium acetate was added, and the plant tannins degradation product was obtained.

[0048]2) Among the plant tannins obtained from step 1), 0.4 decay is added, 10 of lauryl sulfonated succinic acid monoester, then transferred to a microwave reactor, at power 500W, temperature 40 ° C conditions Under the treatment of 60 minutes, the plant tannins antibacterial finished product 2.

Embodiment 3

[0049]Example 3 Preparation of plant tannins antibacterial agent

[0050]The preparation method of plant tannins antibacterial agents, including steps: 1) 350 cases of cysteamine, 15 parts of ascorbic acid, and dissolved in 200 parts of ethanol, add 0.8 parts of hydrochloric acid, and completely mixed with 200 parts of ethanol. Under the conditions of 50 ° C, the reaction was reacted for 300 minutes, and 10 parts of potassium acetate were added after the reaction was completed, and the plant tannins degradation product was obtained.

[0051]2) Among the plant tanning degradation products obtained to step 1, 10 parts of formaldehyde, 8 single moonli phosphate, and then transferred to the microwave reactor, and processed for 60 minutes under the temperature of 750W, temperature 25 ° C for 60 minutes. Plant tannins antibacterial product 3.

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Abstract

The invention belongs to the field of biocides, and discloses a vegetable tannin antibacterial agent with a body structure, and a preparation method and application thereof. A nucleophilic reagent isused for degrading vegetable tannin, and then a phenolic aldehyde condensation reaction is carried out, so that the molecular weight of a vegetable tannin antibacterial agent product is increased, andthe number of C6C6 bonds is increased; therefore, the obtained product has the structural characteristic of 'space body type'; meanwhile, in the phenolic aldehyde condensation reaction process, the reaction process can be carried out uniformly by virtue of the non-thermal effect of a microwave field, meanwhile, the reaction speed is increased, and finally, the vegetable tannin antibacterial agentwith a highly branched molecular structure, large molecular weight and a stable physical and chemical state is obtained. Meanwhile, through a mode of firstly degrading and then condensing, the defectthat the molecular weight is difficult to control or precipitates are easy to form due to overlarge molecular weight caused by direct condensation without degradation is avoided. The vegetable tanninantibacterial agent disclosed by the invention is a broad-spectrum antibacterial agent, is suitable for preparing biocides and has a wide application prospect.

Description

Technical field[0001]The present invention belongs to the field of murderous agents, and more particularly to plant tannins antibacterial agents and preparation methods and applications thereof.Background technique[0002]Rana Catesbeiana is a Chordata, Vertebrate, AMPHIBIA, aunra, Ranidae, Rana (RANA). Because of its male sound, it is known as the cattle, is the most famous edible frog in the world. The bullfrog is a large-scale edible frog, the meat is white, delicious, rich in nutrients, 19.9 grams of protein per 100 grams of frog, 0.3 grams of fat, is a high protein, low fat, low calorie, low cholesterol Animal nutritional health food. The skin of the bullfrog, the skin, the oil, hormones, gland and bile can be used as raw materials in industries, aquaculture and pharmaceutical industry, and has a very high application value. The bullfrog has the characteristics of strong adaptability, fast growing, high breeding, delicious, nutritious, so far more profit, farming range and scale ...

Claims

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Application Information

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IPC IPC(8): A61K31/353A61P31/04A01N43/16A01P1/00C07D311/62C08G8/20C08G8/04
CPCA61K31/353A61P31/04A01N43/16C07D311/62C08G8/20C08G8/04
Inventor 滕博温小波孙志杰刘嘉曼刘杨刘雨晴何晓峰
Owner SHANTOU UNIV
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