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 improvemen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: The stilbene zeolite with a particle size of 500 meshes and a 27% sodium nitrate solution with a mass concentration of 27% were mixed at a solid-to-liquid ratio of 1g / ml, reacted at 95°C for 1.5 hours, and centrifuged at 3000r / min for 20 After 5 minutes, the supernatant liquid was poured off, and the washing was repeated 3 times to obtain Na-type zeolite. Combine the prepared Na-type zeolite with AgNO with a concentration of 0.25 mol / l 3 For the reaction, the reaction solid-liquid ratio is 1g / 10ml, the reaction temperature is 70℃, the reaction pH is 7.0, the reaction time is 2.5 hours, and then washed with deionized water, centrifuged at 3000r / min for 20 minutes, and the upper layer is decanted. The clear liquid is washed repeatedly until the supernatant liquid is tested with sodium chloride solution and no white precipitate is formed, and then the modified zeolite obtained is dried at 105° C. for 5 hours, and then ground to 500-1200 mesh. Add 0.6% by mass (relat...

Example Embodiment

[0023] Example 2: Mix zeolite with a particle size of 700 mesh and a 30% sodium nitrate solution with a mass concentration of 1g / ml at a solid-to-liquid ratio, react at 70°C for 1.5 hours, centrifuge at 3000r / min for 20 minutes, The supernatant liquid was decanted, and the washing was repeated 3 times to obtain Na-type zeolite. Combine the prepared Na-type zeolite with AgNO with a concentration of 0.2mol / l 3 Reaction, reaction solid-liquid ratio is 1g / 10ml, reaction temperature is 60℃, pH value is 8.0, reaction time is 2 hours, and then washed with deionized water, centrifuged at 3000r / min for 20 minutes, decanted the supernatant Repeat the washing until the supernatant is tested with sodium chloride solution and no white precipitate is formed. Then, the modified zeolite is dried at 105°C for 5 hours, and then ground to 700 mesh. Add 0.5% by mass (relative to the bone-dry pulp) of silver-loaded antibacterial zeolite and 20% (relative to the bone-dry pulp) talc powder into the slur...

Example Embodiment

[0024] Example 3: Mix the zeolite with a particle size of 500 mesh and a 25% sodium nitrate solution with a mass concentration of 1g / ml at a solid-to-liquid ratio, react at 85°C for 1 hour, and centrifuge at 3000r / min for 20 minutes using a centrifuge. The supernatant liquid was decanted, and the washing was repeated 3 times to obtain Na-type zeolite. Combine the prepared Na-type zeolite with AgNO with a concentration of 0.3 mol / l 3 Reaction, reaction solid-liquid ratio is 1g / 10ml, reaction temperature is 70℃, pH value is 6.0, reaction time is 2.5 hours, and then washed with deionized water, centrifuged at 3000r / min for 20 minutes, decanted the supernatant Repeat the washing until the supernatant is tested with sodium chloride solution and no white precipitate is formed, and then the modified zeolite obtained is baked at 100°C for 6 hours, and then ground to 500 mesh. 0.5% by mass (relative to the bone-dry pulp) of silver-loaded antibacterial zeolite and 20% (relative to the bone-...

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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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