Method for preparing antibacterial paper on the basis of interlayer self-assembling technology

A self-assembly technology, self-assembly technology, applied in the field of pulp and paper making, can solve the problems of loss of antibacterial function, increase of production cost, loss of antibacterial agent, etc., and achieve the effect of improving physical strength, enhancing antibacterial performance, and improving burst index

Inactive Publication Date: 2012-07-18
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, antibacterial paper is mainly prepared by surface coating, spraying antibacterial agent, and impregnation at home and abroad, and its antibacterial effect will gradually lose antibacterial function in the subsequent processing process or with the influence of storage time and ambient temperature; The preparation method is to add antibacterial agent directly into the slurry, but the antibacterial agent will be easily lost with the white water of papermaking, resulting in low utilization rate and increasing production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing antibacterial paper based on interlayer self-assembly technology. First, disintegrate and beat the bleached kraft hardwood pulp board until the beating degree of the pulp is 35°SR, and prepare a pulp suspension with a concentration of 0.5%, and adjust the pH value to 5.5, under the stirring condition of 100 rev / min, add chitosan biguanide hydrochloride in an amount of 1.0% (calculated on dry pulp), make it adsorb on the fiber for 30min, and complete the first layer of self-assembly. Then, wash and filter the above-mentioned treated fibers, and make a pulp suspension with a concentration of 0.5%, adjust the pH value to 5.5, and add 0.8% (based on dry pulp) under the stirring condition of 100 rpm Calculation) of sodium carboxymethyl cellulose, the polymer is adsorbed on the fiber for 30min, and the second layer of self-assembly is completed. The polyelectrolyte-treated slurry is made into paper sheets on a paper sample machine, and the weight is 70 ...

Embodiment 2

[0024] A method for preparing antibacterial paper based on interlayer self-assembly technology. First, disintegrate and beat the bleached kraft hardwood pulp board until the beating degree of the pulp is 35°SR, and prepare a pulp suspension with a concentration of 0.5%, and adjust the pH value to 5.5, under the stirring condition of 100 rpm / min, add chitosan biguanide hydrochloride in an amount of 1.0% (calculated on dry pulp) to make it adsorb on the fiber for 30 minutes to complete the first layer of self-assembly. Then, wash and filter the above-mentioned treated fibers, and make a pulp suspension with a concentration of 0.5%, adjust the pH value to 5.5, and add 0.8% (based on dry pulp) under the stirring condition of 100 rpm Calculation) of sodium carboxymethyl cellulose, the polymer is adsorbed on the fiber for 30min, and the second layer of self-assembly is completed. Repeat the above operations until the number of self-assembled layers is the seventh layer. The polyele...

Embodiment 3

[0026]A method for preparing antibacterial paper based on interlayer self-assembly technology. First, disintegrate and beat the bleached kraft hardwood pulp board until the beating degree of the pulp is 35°SR, and prepare a pulp suspension with a concentration of 0.5%, and adjust the pH value to 7.5, under the stirring condition of 100 rpm / min, add chitosan biguanide hydrochloride in an amount of 1.0% (calculated on dry pulp) to make it adsorb on the fiber for 30 minutes to complete the first layer of self-assembly. Then, wash and filter the above-mentioned treated fibers, and make a pulp suspension with a concentration of 0.5%, adjust the pH value to 7.5, and add 0.8% (based on dry pulp) under the stirring condition of 100 rpm Calculation) of sodium carboxymethyl cellulose, the polymer is adsorbed on the fiber for 30min, and the second layer of self-assembly is completed. The polyelectrolyte-treated slurry is made into paper sheets on a paper sample machine, and the weight is...

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Abstract

The invention discloses a method for preparing antibacterial paper on the basis of an interlayer self-assembling technology. In the method, cationic polyelectrolyte chitosan biguanide hydrochloride (CGH) with an antibacterial function, and anionic polyelectrolyte carboxymethyl cellulose sodium (CMC) are alternately deposited on the surface of a bleached kraft hardwood fiber to prepare a layered ordered self-assembled multilayer ultrathin film, which can improve the strength property of a paper sheet while endowing the paper sheet with a good antibacterial performance. Through the change of the environment and the technical conditions of an interlayer self-assembling system, multilayer film structures with different properties can be obtained on the surface of the bleached kraft hardwood fiber, the retention of an antibacterial agent on the fiber is improved, and the antibacterial effect of the paper sheet is enhanced; a layered ordered self-assembled nano-film is prepared by taking a negatively-charged fiber as a matrix and controlling the adsorption process of a reverse-phase ion system,; the preparation method is simple in production process, less in equipment investment and high in adaptability; the prepared antibacterial paper has better antibacterial performance and strength property; and antibacterial requirements of household paper and food packaging paper can be met better.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for preparing antibacterial paper based on interlayer self-assembly technology. Background technique [0002] With the development of science and technology and the continuous improvement of people's quality of life, people's requirements for daily necessities are getting higher and higher, especially in recent years, the outbreak of various infectious diseases, such as the sudden "SARS" in 2003, spread all over the world in 2004 Avian influenza in 2009, and Influenza A in 2009 1 N 1 The outbreak of influenza has seriously endangered human health. According to the statistics of the World Health Organization, the number of deaths caused by bacterial infection is 20 million people in the world every year, accounting for about 30% of the total number of deaths. Therefore, people have put forward higher requirements for daily necessities in dai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/26D21H17/24
Inventor 唐艳军夏军薛国新
Owner ZHEJIANG SCI-TECH UNIV
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