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Inorganic silver-impregnated zeolite antibiotic papers and method of producing the same

A technology of silver-loaded zeolite and antibacterial paper, which can be used in the addition of inorganic compounds, paper, and pigment-containing coatings, etc., can solve the problems of poor high temperature resistance and durability, and poor human safety, and achieve high durability, good antibacterial effect, The effect of improving safety

Inactive Publication Date: 2008-05-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The antibacterial agents used in these antibacterial papers are mostly organic antibacterial agents, which have poor high temperature resistance and durability, and have the disadvantages of relatively poor safety to the human body. With the improvement of people's living standards and safety awareness, it is necessary to develop new types of antibacterial agents. Antibacterial agents with better safety, high temperature resistance and durability are used in the production of modern new antibacterial paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the particle diameter is 500 mesh hematilite and mass concentration is 27% sodium nitrate solution is mixed with the solid-liquid ratio of 1g / ml, reacts at 95 ℃ for 1.5 hours, adopts centrifuge with 3000r / min, centrifuges 20 Minutes, the supernatant was poured off, and the washing was repeated three times in this way to obtain Na-type zeolite. The prepared Na-type zeolite was mixed with AgNO at a concentration of 0.25mol / l 3 Reaction, the reaction solid-liquid ratio is 1g / 10ml, the reaction temperature is 70°C, the reaction pH value is 7.0, and the reaction time is 2.5 hours, then wash with deionized water, use a centrifuge at 3000r / min, centrifuge for 20 minutes, and pour off the upper layer The supernatant was washed repeatedly in this way until the supernatant was tested with sodium chloride solution and no white precipitate was formed, then the obtained modified zeolite was dried at 105°C for 5 hours, and then ground to 500-1200 mesh. Add silver-loade...

Embodiment 2

[0023] Example 2: Mix the zeolite with a particle size of 700 mesh and 30% sodium nitrate solution at a solid-to-liquid ratio of 1 g / ml, react at 70° C. for 1.5 hours, and centrifuge at 3000 r / min for 20 minutes with a centrifuge. The supernatant was poured off, and the washing was repeated three times in this way to obtain Na-type zeolite. The prepared Na-type zeolite was mixed with AgNO at a concentration of 0.2 mol / l 3 Reaction, the reaction solid-liquid ratio is 1g / 10ml, the reaction temperature is 60°C, the pH value is 8.0, the reaction time is 2 hours, then wash with deionized water, use a centrifuge at 3000r / min, centrifuge for 20 minutes, and pour off the supernatant solution, and repeated washing in this way until the supernatant was tested with sodium chloride solution and no white precipitate was formed, then the obtained modified zeolite was dried at 105°C for 5 hours, and then ground to 700 mesh. The silver-loaded antibacterial zeolite and 20% (relative to the dr...

Embodiment 3

[0024] Example 3: Mix the zeolite with a particle size of 500 mesh and 25% sodium nitrate solution at a solid-to-liquid ratio of 1 g / ml, react at 85° C. for 1 hour, and centrifuge at 3000 r / min for 20 minutes with a centrifuge. The supernatant was poured off, and the washing was repeated three times in this way to obtain Na-type zeolite. The prepared Na-type zeolite was mixed with AgNO at a concentration of 0.3mol / l 3 Reaction, the reaction solid-liquid ratio is 1g / 10ml, the reaction temperature is 70°C, the pH value is 6.0, and the reaction time is 2.5 hours, then wash with deionized water, use a centrifuge at 3000r / min, centrifuge for 20 minutes, and pour off the supernatant solution, and repeated washing in this way until the supernatant was tested with sodium chloride solution and no white precipitate was formed, then the obtained modified zeolite was baked at 100°C for 6 hours, and then ground to 500 mesh. Add silver-loaded antibacterial zeolite with a mass percentage of...

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Abstract

The invention discloses an inorganic silver-loaded zeolite antibacterial paper and a preparation method thereof. In the method, the zeolite is first mixed with a sodium nitrate solution with a mass concentration of 20-30% in a solid-liquid ratio of 1 g / ml, and the reaction is carried out at 70-95 DEG C for 1 ~2 hours, centrifugation and washing to prepare Na-type zeolite; load high content of silver ions by ion exchange method to prepare inorganic silver-carrying antibacterial zeolite for papermaking. The antimicrobial agent is then added to the wet-end sheet or mixed with a coating for surface coating. Calculated by mass percentage content, the silver content of the inorganic silver-carrying zeolite antibacterial paper is 0.05-0.40%. The antibacterial paper prepared by the invention has better antibacterial performance, safety, temperature resistance and durability, simple preparation process and convenient application, and can better meet the antibacterial requirements of household paper and food packaging paper.

Description

technical field [0001] The invention relates to antibacterial paper, in particular to an inorganic silver-loaded zeolite antibacterial paper and a preparation method thereof. Background technique [0002] With the development of the economy and the improvement of living standards, people have put forward new requirements for some household paper and industrial paper, and bacteria resistance is one of them. Antibacterial materials are a new class of functional materials with antibacterial and bactericidal properties. "Antibacterial" refers to inhibiting the growth, reproduction and survival of microorganisms such as bacteria and fungi within a certain period of time. In the field of chemical engineering and medicine, some materials have bactericidal and bacteriostatic properties, such as some inorganic metal compounds, organic compounds and natural minerals. But more often, adding or compounding one or several specific antibacterial ingredients to make antibacterial materia...

Claims

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Application Information

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IPC IPC(8): D21H17/69D21H21/36D21H19/64
Inventor 杨飞陈克复杨仁党李军
Owner SOUTH CHINA UNIV OF TECH
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