A preparation method of fiber with antibacterial function that can regenerate absorb heavy metal dust

A technology for adsorbing heavy metals and functional fibers, applied in the field of preparation of bacteriostatic functional cellulose acetate, can solve the problems of inability to effectively remove heavy metal dust, limited bacteriostatic effect, difficult biodegradation, etc., so as to inhibit the growth of bacteria and fungi , low cost, good biosafety effect

Active Publication Date: 2017-02-01
张红梅 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is expensive and uses synthetic fibers as raw materials, which is difficult to biodegrade and cannot effectively remove heavy metal dust
The latter has limited antibacterial effect and is prone to failure due to washing

Method used

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  • A preparation method of fiber with antibacterial function that can regenerate absorb heavy metal dust
  • A preparation method of fiber with antibacterial function that can regenerate absorb heavy metal dust
  • A preparation method of fiber with antibacterial function that can regenerate absorb heavy metal dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the first step, add 10g of cellulose diacetate (80% degree of esterification) into 300mL of acetone, stir and dissolve at room temperature, and slowly and dropwise add 6g of N,N-dimethylformamide at 25-28°C 50 ml of acetone solution, and 50 ml of acetone solution containing 6 g of p-hydroxybenzoyl chloride and 6.5 g of 2,4-dihydroxybenzoyl chloride, were added dropwise in about 25-30 minutes; the reaction was kept at 35-40°C for 120 minutes.

[0035]In the second step, the above-mentioned reaction solution is filtered to remove the hydrochloride precipitate formed by the hydrogen chloride generated by the reaction and the basic catalyst N,N-dimethylformamide, and the filtrate is the acetone solution of polyhydroxy cellulose acetate. Extruded through the spinneret, the solvent is volatilized in the hot air flow, and the fine stream forms fibers. Wash the fiber 3 times with 100 mL of water to wash a small amount of alkaline catalyst adsorbed on the fiber. The fiber wa...

Embodiment 2

[0037] In the first step, add 10g of cellulose diacetate (74% degree of esterification) to 200mL of acetone, stir and dissolve at room temperature, and slowly and simultaneously dropwise add 50mL of acetone solution containing 7g of triethylamine, and 50 mL of acetone solution of 6 g of o-hydroxybenzoyl chloride and 7 g of 3,4,5-trihydroxybenzoyl chloride was added dropwise in about 25-30 minutes, and the reaction was kept at 20-22°C for 60 minutes.

[0038] The second step is to filter the above reaction solution to remove the hydrochloride precipitate formed by the reaction hydrogen chloride and the basic catalyst triethylamine. The filtrate is the acetone solution of polyhydroxy cellulose acetate, and the solution is extruded through the spinneret , the solvent is volatilized in the hot air flow, and the fine flow forms fibers. Wash the fiber 3 times with 100 mL of water to wash a small amount of alkaline catalyst adsorbed on the fiber. The fiber was dried at 100° C. for 2...

Embodiment 3

[0040] In the first step, add 10g of cellulose diacetate (95% degree of esterification) into 100mL of dioxane, stir and dissolve at room temperature, and slowly add 50mL of dioxane solution containing 6.1g of pyridine dropwise at 23-25°C , and 50 mL of a dioxane solution containing 3 g of p-hydroxybenzoyl chloride and 10 g of 3,4,5-trihydroxybenzoyl chloride, the dropwise addition was completed in about 25-30 minutes, and the reaction was kept at 30-33°C for 120 minutes.

[0041] The second step is to filter the above reaction solution to remove the hydrochloride precipitate formed by the hydrogen chloride generated by the reaction and the basic catalyst pyridine. The filtrate is the dioxane solution of polyhydroxy acetate cellulose, and the solution is extruded through the spinneret , the solvent is volatilized in the hot air flow, and the fine flow forms fibers. Wash the fiber 3 times with 100 mL of water to wash a small amount of alkaline catalyst adsorbed on the fiber. Th...

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Abstract

The invention discloses a method for preparing a renewable anti-bacteria fiber for adsorbing heavy metal motes. The preparation method comprises the following steps: dissolving cellulose acetate in a specific solvent; adding a certain amount of polyhydroxyl benzoyl chloride and a basic catalyst to generate polyhydroxyl benzene acid cellulose acetate; filtrating to remove the basic catalyst and solid salt formed by by-product, chlorine hydride; filtrating the liquor by adopting an industrial frequently-used vacuum silk imitation method, and evaporating a solvent to prepare a functional artificial fiber. According to the method for preparing a functional cellulose acetate fiber, the heavy metal motes can be effectively removed by an air filtration material and the fiber has the anti-bacteria function and can be reused.

Description

technical field [0001] The invention relates to the field of fiber preparation, in particular to a method for preparing antibacterial functional cellulose acetate capable of regeneratively absorbing heavy metal dust. Background technique [0002] Cellulose acetate is usually produced by the following method: After the refined short linters are dried, activated by acetic acid, and then esterified with a mixture of acetic acid and acetic anhydride that is 7 times the amount of refined linters in the presence of a sulfuric acid catalyst, to make it Acetic acidification, and then add dilute acetic acid to hydrolyze to the required degree of hydrolysis (1.72 ~ 1.95). Neutralize the catalyst to precipitate the product. After deacidification, washing, cooking and drying, a cellulose acetate can be obtained. During the acetylation reaction, changing the amount of the mixed solution of acetic acid and acetic anhydride added can produce cellulose diacetate and cellulose triacetate. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30B01D46/30B01D39/04C08B3/16D01F2/28A01P1/00A01P3/00
CPCB01D39/04B01D46/30B01D2239/0208B01J20/24B01J20/3085B01J2220/4825C08B3/16D01F2/28
Inventor 张红梅褚莉莉徐浩
Owner 张红梅
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