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Molecular assembly type nanometer silver leather mildew inhibitor and method for preparing same

A technology of antifungal agent and nano-silver, which is applied in botany equipment and methods, leather impregnation, small raw hide/large raw hide/leather/fur treatment, etc., and can solve the problem of mildew resistance decline, limited application fields and application methods, etc. question

Inactive Publication Date: 2009-09-30
成都塔拉生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned antifungal and antibacterial agent materials have their own characteristics, there are still some deficiencies: ①IPBC has a wide antibacterial spectrum and is effective against fungi, molds, yeasts, algae and bacteria. If it is lost, its mildew resistance will decrease with time; ②Generally, nano-silver materials are mostly solid, and the existing liquid products are mostly dispersed, so their application fields and application methods are limited; ③Composite anti-fungal agents are limited to Organic compound to improve the insufficiency of a certain antifungal agent in killing certain molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Dissolve 5 grams of chitosan with a degree of deacetylation greater than 80% with 100 mL of 1% acetic acid solution, stir and dissolve at room temperature, add 20 mL of methanol after 2 hours, and continue stirring for 0.5 hours. The reaction solution is in the form of a transparent colloid . Dissolve 21 grams of benzaldehyde in 50 mL of methanol, add it dropwise to the chitosan solution while stirring, react at room temperature for 30 hours, wash with methanol and ether in sequence, filter with suction, dry at a temperature of 60°C and a vacuum of 0.05 MPa, and grind , through a 60-mesh sieve, and set aside.

[0037] (2) Disperse 18 grams of the above-mentioned modified chitosan in a mixed solution containing 360 mL of chloroform and 60 mL of pyridine, stir and soak for 20 hours at a temperature of 60° C. Dissolve in 400mL chloroform, slowly add dropwise to the above solution, react at 60°C for 18h, filter under reduced pressure, wash with distilled water and ethano...

Embodiment 2

[0040] (1) Dissolve 4 grams of chitosan with a deacetylation degree greater than 80% with 80 mL of 1% acetic acid solution at room temperature, add 16 mL of methanol after 1.5 h, and continue stirring for 0.5 h. The reaction solution is in the form of a transparent colloid . Dissolve 18 grams of benzaldehyde in 40 mL of methanol, add dropwise to the chitosan solution while stirring, react at room temperature for 26 hours, wash with methanol and ether in sequence, filter with suction, dry at a temperature of 60°C and a vacuum of 0.06 MPa, and grind Crushed, passed through a 60-mesh sieve, and set aside.

[0041] (2) Disperse 14 grams of modified chitosan in a mixed solution containing 340 mL of chloroform and 50 mL of pyridine, stir and soak for 18 hours at a temperature of 60° C. In 300mL of chloroform, add dropwise to the above solution, react at 60°C for 24h, filter under reduced pressure, wash with distilled water and ethanol in turn, and hydrolyze the filter cake with 0.2...

Embodiment 3

[0044] (1) Dissolve 3 grams of chitosan with a degree of deacetylation greater than 80% with 60 mL of 1% acetic acid solution at room temperature and stir to dissolve it. After 1.5 hours, add 13 mL of methanol and continue to stir for 0.5 hours. The reaction solution is in the form of a transparent colloid. . Dissolve 15 grams of benzaldehyde in 30 mL of methanol, add it dropwise to the above chitosan solution while stirring, react at room temperature for 26 hours, wash with methanol and ether in sequence, filter with suction, dry at a temperature of 60°C and a vacuum of 0.06 MPa, and grind Crushed, passed through a 60-mesh sieve, and set aside.

[0045] (2) Disperse 12 grams of modified chitosan in a mixed solution containing 330 mL of chloroform and 50 mL of pyridine, stir and soak for 18 hours at a temperature of 60° C. Add dropwise to the above solution in 150mL chloroform, react at 60°C for 24h, filter under reduced pressure, wash with distilled water and ethanol success...

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Abstract

The invention discloses a molecular assembly type nanometer silver leather mildew inhibitor and a method for preparing the same. The method is characterized by comprising the following steps: (1) reacting 2 to 5 portions of chitosan with the deacetylation degree more than 80 percent with 12 to 21 portions of benzaldehyde at room temperature to generate schiff alkali chitosan; (2) reacting 10 to 18 portions of the schiff alkali chitosan with 21 to 40 portions of bromization crown ether at a temperature of between 50 and 70 DEG C to generate crown ether crosslinking chitosan; (3) dissolving 28 to 41 portions of crown ether crosslinking chitosan in 5,000 to 7,000mL of distilled water, adding 400 to 1,200 portions of 0.05 to 0.3 percent hydrazine hydrate solution to the mixed solution, evenly mixing by shaking, adding 160 to 900 portions of 0.1 to 0.3mol / L silver nitrate solution to the mixed solution after 5 to 20 minutes; and (4) placing the mixed solution in a water bath at a temperature of between 40 and 60 DEG C, standing at the room temperature for 10 to 20 hours when the color of the mixed solution is stably changed, and obtaining the molecular assembly type nanometer silver leather mildew inhibitor.

Description

technical field [0001] The invention relates to a molecular assembly type nano-silver leather antifungal agent and a preparation method thereof, which belongs to the field of preparation of fine chemical products and is applied in leather or textiles. Background technique [0002] Most of leather antifungal agents use heterocyclic compounds as active ingredients, they have low toxicity, broad bactericidal spectrum, and good antifungal effect [Gu Haibin, Chen Wuyong. Research progress of leather antifungal and antifungal agents[J]. China Leather, 2005 , 34(1): 12-15; Zhao Ting, Dai Hong, Zhang Zongcai, etc. Nano-antibacterial materials and their application in the field of leather [J]. China Leather, 2005, (17): 31-35; Mao Yibo Liu Jiaming, Wang Zhanyue, etc. Review of the research progress of green leather antifungal agents under the new situation [J]. Leather Chemical Industry, 2007, 24 (6): 22-25, 38]. Its main development trends are: [0003] 1. A new type of high-effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N43/24A01N43/16A01P1/00A01P3/00C14C9/00D06M15/03D06M11/83D06M13/175
Inventor 张宗才李洁赵婷戴红吴九皋
Owner 成都塔拉生物科技有限公司
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