Preparation method of flame-retardant antibacterial composite air filter paper

A technology of air filter paper and preparation steps, which is applied in the field of preparation of flame retardant and antibacterial composite air filter paper, can solve the problems of low flame retardant efficiency of flame retardants, decreased mechanical properties of filter paper, environmental pollution, etc., and achieves remarkable antibacterial effect and simple preparation process easy-to-use effects

Inactive Publication Date: 2016-11-09
仇颖莹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the flame retardant in the current flame retardant air filter paper has a low flame retardant efficiency and a large amount of addition, which leads to a decrease in the mechanical properties of the filter paper, and the flame retardant effect cannot be sustained, and there will be a phenomenon of returning halogen and absorbing moisture. Cause environmental pollution, and the surface of filter paper is easy to adhere to bacteria at the same time, causing the problem of secondary pollution. The present invention mixes chitosan and starch through rapid cooling, and grafts it with tetraethyl orthosilicate and trimethylchlorosilane to achieve Chitosan is a bacteriostatic substance, and then the reactant is grafted with starch to increase the flame retardancy, and the strength is increased by adding sepiolite, and the flame retardancy is further improved, and then it is combined with alkali-free glass microfiber, bamboo pulp, etc. Mix papermaking, then impregnate with impregnation solution, modify the surface, add juniper oil and dopamine to improve antibacterial properties, and prepare flame-retardant and antibacterial composite air filter paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] According to the solid-liquid ratio of 1:3, take chitosan and put it into a hydrochloric acid solution with a mass fraction of 20%, and add cornstarch with 2% chitosan mass to it, and place it in an ultrasonic oscillator and vibrate at 27KHz for 25min , then add hydrochloric acid solution with 35% absolute ethanol by volume, stir evenly and put it into a liquid nitrogen quick-freezer, set the temperature at -13°C, and freeze for 4 minutes; Put the frozen product, tetraethyl orthosilicate and trimethylchlorosilane into the autoclave, heat up to 75°C, preheat for 25 minutes, adjust the pH to 8.0 with 30% sodium hydroxide solution, and heat up to 125°C , stirred and reacted at 160r / min for 3h, cooled naturally to room temperature, discharged and filtered, and washed the filter residue with distilled water until the pH of the washing liquid was neutral; Grind in the machine, cross 200 mesh sieves, and take 52 parts of alkali-free glass microfibers, 38 parts of bamboo pulp, ...

example 2

[0022] According to the solid-liquid ratio of 1:3, take chitosan and put it into a hydrochloric acid solution with a mass fraction of 20%, and add cornstarch with 3% chitosan mass to it, and place it in an ultrasonic oscillator and vibrate at 28KHz for 30min , then add hydrochloric acid solution with 40% absolute ethanol by volume, stir evenly and put it into a liquid nitrogen quick-freezer, set the temperature at -15°C, and freeze for 5 minutes; Put the frozen product, tetraethyl orthosilicate and trimethylchlorosilane into the autoclave, heat up to 80°C, preheat for 30 minutes, adjust the pH to 8.5 with 30% sodium hydroxide solution, and heat up to 130°C , stirred and reacted at 160r / min for 4h, cooled naturally to room temperature, discharged and filtered, and washed the filter residue with distilled water until the pH of the washing liquid reached neutral; after the above washing, put the filter residue and its mass 7% sepiolite into the mill Grind in the machine, cross 20...

example 3

[0026] According to the solid-to-liquid ratio of 1:3, put chitosan into a hydrochloric acid solution with a mass fraction of 20%, and add cornstarch with 1% chitosan mass to it, and place it in an ultrasonic oscillator and vibrate at 26KHz for 20min , then add hydrochloric acid solution with 30% absolute ethanol by volume, stir evenly, put it into a liquid nitrogen quick-freezer, set the temperature at -10°C, and freeze for 3 minutes; Put the frozen product, tetraethyl orthosilicate and trimethylchlorosilane into the autoclave, heat up to 70°C, preheat for 20 minutes, adjust the pH to 8.0 with 30% sodium hydroxide solution, and heat up to 120°C , stirred and reacted at 160r / min for 3h, cooled naturally to room temperature, discharged and filtered, and washed the filter residue with distilled water until the pH of the washing liquid reached neutral; after the above washing, put the filter residue and its mass of 5% sepiolite into the Grind in the machine, cross a 200-mesh sieve...

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Abstract

The invention relates to a preparation method of flame-retardant antibacterial composite air filter paper, belongs to the technical field of air filter materials, and aims at solving the problems that due to the fact that a flame retardant in existing flame-retardant air filter paper is low in flame retarding efficiency and more in addition amount, the mechanical property of the filter paper is reduced, the flame retarding effect cannot be lasting, halogen returning and moisture absorption phenomena can be generated to cause environmental pollution, and bacteria are prone to be adhered to the surface of the filter paper to cause secondary pollution. According to the preparation method, chitosan and starch are quickly cooled and mixed, the mixture is subjected to a grafting reaction with tetraethyl orthosilicate and trimethylchlorosilane, starch is grafted to a reactant by taking chitosan as an antibacterial substance, and therefore the flame retardance is improved; by adding sepiolite, the flame retardance is further improved while the strength is improved; paper is made by mixing the materials with alkali-free glass microfibers, bamboo pulp and the like and then steeped in steeping liquor for surface modification, sabina chinensis oil and dopamine are added to improve the antibacterial property, and then the flame-retardant antibacterial composite air filter paper is prepared.

Description

technical field [0001] The invention relates to a preparation method of flame-retardant and antibacterial composite air filter paper, which belongs to the technical field of air filter materials. Background technique [0002] Air filter paper is a key component of the air filter element, and its performance determines the effect of the air filter. As the pharmaceutical, medical and health, electronics and other industries have higher and higher requirements for the cleanliness of workshops, higher requirements are put forward for air filters. In particular, ultra-clean ovens or high-temperature air purification equipment and systems required by food, pharmaceutical and other production links have a maximum operating temperature of 350°C, so higher requirements are placed on the temperature resistance of filter paper. At present, pure glass microfiber filter paper is mostly used in the environment with high temperature at home and abroad. This kind of filter paper does not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/08D21D1/02D21F1/00D21F5/14D21H17/24D21H17/68D21H17/36D21H17/57D21H17/35D21H17/02D21H17/07
CPCD21H27/08D21D1/02D21F1/00D21F5/14D21H17/02D21H17/07D21H17/24D21H17/35D21H17/36D21H17/57D21H17/68
Inventor 仇颖莹宋奇
Owner 仇颖莹
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