Bactericidal chitosan and its preparation and method for making cellulose solvent weaving liquid

The technology of chitosan and antibacterial agent is applied in the field of antibacterial agent chitosan and its preparation and preparation of cellulose solvent spinning solution, and achieves the effects of good moisture retention, obvious antibacterial effect and lasting antibacterial effect.

Inactive Publication Date: 2005-07-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The antibacterial chitosan (derivative) that the patent of the present invention relates to and the solvent spinning method of cellulose fiber have not seen any report yet

Method used

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  • Bactericidal chitosan and its preparation and method for making cellulose solvent weaving liquid
  • Bactericidal chitosan and its preparation and method for making cellulose solvent weaving liquid

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Embodiment 1

[0015] Embodiment one, O-2'-hydroxypropyltrimethylammonium chloride chitosan and cellulose composite antibacterial fiber

[0016] 1. Radiation degradation of chitosan: Chitosan with a molecular weight of 1.08 million and a degree of deacetylation of 85% is produced by Co 60 The radiation source is irradiated with a radiation dose of 60 kGy to obtain chitosan oligomer A with a molecular weight of 100,000 to 200,000 and a deacetylation degree of 86%.

[0017] 2. Preparation of O-2'-hydroxypropyltrimethylammonium chloride chitosan:

[0018] ① Synthesis of N-benzylidene chitosan: Weigh 300 grams of A, dissolve in 12 liters of 10%wt acetic acid solution, add 1580 grams of benzaldehyde dropwise, and react at 50°C for 20 hours. Adjust the pH to neutral with lye and filter. The filter cake was washed 2 to 3 times with methanol, and dried at 60°C to obtain light yellow solid B.

[0019] ②Preparation of O-quaternary ammonium salt-N-benzylidene chitosan: 280 grams of B, reacted with 5...

Embodiment 2

[0025] Embodiment two, O-methacryloyloxytrimethylammonium chloride chitosan and cellulose composite antibacterial fiber

[0026] 1. The radiation degradation of chitosan: do by embodiment one, 1

[0027] 2. Preparation of O-methacryloxytrimethylammonium chloride chitosan:

[0028] 1. the synthesis of N-benzylidene chitosan: according to embodiment one, 2.1. do

[0029] ② Preparation of O-quaternary ammonium salt-N-benzylidene chitosan: B280g, react with 5 liters of isopropanol and 1300g of methacryloxytrimethylammonium chloride at 60°C for 10 hours . After filtering, the filter cake was washed 2-3 times with methanol, and dried at 60°C to obtain white solid C.

[0030]③The preparation of O-methacryloxytrimethylammonium chloride chitosan: add 300 grams of C in 5 liters of 2.5mol / liter hydrochloric acid-ethanol solution, after fully stirring, remove ethanol, add 2.5 liters of water again, fully Dissolve, and finally precipitate the product with acetone, wash the precipitate ...

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Abstract

The invention discloses an antibacterial agent chitosan and a method for preparing and preparing an antibacterial chitosan and cellulose composite fiber solvent spinning solution, belonging to chitosan antibacterial agent and the spinning technology applied to cellulose fiber. The chitosan antibacterial agent is O-2'-hydroxypropyltrimethylammonium chloride chitosan and O-methacryloxytrimethylammonium chloride chitosan; its preparation is chitosan after degradation The product formed by the reaction of sugar with benzaldehyde is reacted with 3-chloro-hydroxypropyltrimethylammonium chloride and methacryloyloxytrimethylammonium chloride in isopropanol medium to obtain the O-shell Polysaccharide quaternary ammonium derivatives. Add the aqueous solution or N, N-dimethylacetamide dispersion of this chitosan antibacterial agent to the N-methylmorphine-N-oxide aqueous solution of cellulose or lithium chloride and N, N-dimethyl Acetamide solution, prepared as antibacterial chitosan and cellulose composite fiber spinning solution. The invention has the advantages that the method for preparing the spinning solution is simple in process, easy to operate, and can be produced by using the spinning equipment of the cellulose itself.

Description

technical field [0001] The invention relates to an antibacterial agent chitosan and a method for preparing and preparing an antibacterial chitosan and cellulose composite fiber solvent spinning solution. It belongs to chitosan antibacterial agent and the spinning technology applied to cellulose fiber. Background technique [0002] Quaternary ammonium derivatives of chitosan have strong antibacterial properties, and have been used in antibacterial and hygienic finishing of fabrics (De Anjian, Special Collections of Polymers, Natural Polymers (Day), 1998, 47(6): 386) . However, the preparation reactions of chitosan quaternary ammonium salts that have been applied and reported at present all occur on the amino group of chitosan pyranose ring, and the result affects some characteristics of chitosan, the only natural alkaline polysaccharide in nature. For this reason, we have developed a chitosan quaternary ammonium salt grafted on the 6-position ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/16C08B37/08D01F2/10
Inventor 管云林刘晓非庄旭品李治李松晔
Owner TIANJIN UNIV
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