Preparation method of macromolecular sterilization fibre with grafted antibacterial monomer on its surface

A polymer fiber and surface grafting technology, which is applied in the field of preparation of polymer sterilized fiber, can solve the problems of poor hydrophilicity, poor anti-bacterial effect, and difficulty in fully exerting the effect, etc.

Inactive Publication Date: 2003-03-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, in a large amount of tests, find that antibacterial metal ions, such as silver salt disinfectant, silver-loaded resin will be affected by water temperature, PH, and also be affected by organic matter in water; The anti-bacterial effect is not good; the hydrophilicity of the halogenated amine graft material is very poor, and it is difficult to fully exert the effect in water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 1g of cellulose fiber and 0.02mol of methacryloyloxyethyl-benzyl-dimethylammonium chloride and 0.0025mol of 4-acryloyloxymethyl-4-ethyl to the reactor -1,3-oxazolidin-2-one, add 25ml of 0.05M dilute nitric acid as solvent.

[0021] (2) Fill the reactor with nitrogen to exhaust the air, add 0.000376mol cerium ammonium nitrate, stir, and fill with nitrogen, the reaction temperature is 30°C, and the reaction time is 0.5 hours.

[0022] (3) After the reaction is finished, stir and rinse with a solvent. After suction filtration and drying, the grafted cellulose fibers were extracted with acetone aqueous solution for about 6 hours, and then dried at 40°C. Grafting rate determined by weight method 76%

[0023] (4) Soak the grafted cellulose fiber in 10% sodium hypochlorite solution for 0.5 hour, take out the fiber, and dry at room temperature.

Embodiment 2

[0025] (1) Add 1 g of cellulose fibers and 0.02 mol of methacryloxyethyl-trimethylammonium chloride into the reactor, and add 25 ml of water as a solvent.

[0026] (2) Fill the reactor with nitrogen to exhaust the air, add 0.000376 mol of cerium ammonium nitrate, stir, and fill with nitrogen, the reaction temperature is 60° C., and the reaction time is 0.5 hour.

[0027] (3) After the reaction is finished, stir and rinse with a solvent. After suction filtration and drying, the grafted cellulose fibers were extracted with acetone aqueous solution for about 6 hours, and then dried at 40°C. The grafting rate measured by weight is 45%.

[0028] (4) Add the above fiber and 0.004mol of 4-acryloyloxymethyl-4-ethyl-1,3-oxazolidin-2-one into the reactor, and add 20ml of 0.05M dilute nitric acid as a solvent.

[0029] (5) Fill the reactor with nitrogen and exhaust the air, add 0.000376 mol of cerium ammonium nitrate, stir, and fill with nitrogen. The reaction temperature is 30° C., an...

Embodiment 3

[0033] (1) Add 1g of cellulose fiber and 0.004mol of 4-acryloyloxymethyl-4-ethyl-1,3-oxazolidin-2-one into the reactor, add 10ml of 0.05M dilute hydrochloric acid to solvent.

[0034] (2) Fill the reactor with nitrogen to exhaust the air, add 0.000376mol cerium ammonium nitrate, stir, and fill with nitrogen, the reaction temperature is 20°C, and the reaction time is 0.5 hours.

[0035] (3) After the reaction is finished, stir and rinse with a solvent. After suction filtration and drying, the grafted cellulose fibers were extracted with acetone aqueous solution for about 6 hours, and then dried at 40°C. The grafting rate measured by weight method was 18%.

[0036](4) Add the above fiber and 0.02mol of acryloxyethyl-trimethylammonium chloride into the reactor, and add 25ml of 0.05M dilute sulfuric acid as a solvent.

[0037] (5) Fill the reactor with nitrogen to exhaust the air, add 0.000376 mol of ammonium cerium sulfate, stir, and fill with nitrogen. The reaction temperatur...

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Abstract

The preparation method of macromolecular sterilization fibre whose surface is grafted by antibacterial monomer belongs to the field of sewage treatment technology, and includes the following steps: firstly, adding quaternary ammonium salt, halogenated amine and macromolecular fibre in the reactor, then adding reaction solvent, charging nitrogen gas into the reactor and discharging air, adding initiating agent to make reaction, after reaction using lots of solvent to stir and flush, filtering and drying, extracting the grafted collulose fibre by using aqueous solution of acetone, and soaking the grafted cellulose fibre in sodium hypochlorite, taking out fibre and drying at room temp. Said invention macromolecular sterilization fibre is a macromolecular treatment agent, not only can be usedfor treating water, but also can be used as medical gauze, artificial skin and shell fabric.

Description

technical field [0001] The invention relates to a preparation method of a polymer sterilizing fiber grafted with an antibacterial monomer on the surface, belonging to the technical field of sewage treatment. Background technique [0002] The fungicides used today can be divided into two categories: oxidizing fungicides and non-oxidizing fungicides according to their mechanism of action. Oxidizing fungicides are mainly Cl 2 , NaClO, potassium permanganate, Br 2 , O 3 、H 2 o 2 etc.; non-oxidizing fungicides include (poly) quaternary ammonium salts, (poly) quaternary phosphonium salts, silver ions, titanium dioxide, phenols, etc. According to the structure of fungicides, they can be divided into inorganic, small molecule organics and polymer fungicides. However, inorganic and small molecule inorganic fungicides generally have the problem of excessive residues, which will cause secondary pollution of water. [0003] Compared with traditional low-molecular-weight fungicide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M14/02
Inventor 邢晓东陈文广曾宏波王晓工
Owner TSINGHUA UNIV
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