Environment-friendly long-acting type nano-silver base wood and bamboo material antibacterial mould inhibitor and preparing method and application thereof

A kind of technology of antibacterial and antifungal agent and nano silver

Inactive Publication Date: 2016-12-14
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pentachlorophenol is the reaction product of phenol and chlorine. It was popularized and used in 1928. It is widely used in the market, but it has been banned in many countries such as New Zealand because of its high toxicity to humans and animals and serious environmental pollution.
However, the patent uses more toxic chemical reagents in the preparation process, which not only increases the cost, but also poses a threat to human health and the ecological environment.

Method used

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  • Environment-friendly long-acting type nano-silver base wood and bamboo material antibacterial mould inhibitor and preparing method and application thereof
  • Environment-friendly long-acting type nano-silver base wood and bamboo material antibacterial mould inhibitor and preparing method and application thereof
  • Environment-friendly long-acting type nano-silver base wood and bamboo material antibacterial mould inhibitor and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Preparation of nano silver-based antibacterial and antifungal agent for wood and bamboo

[0051] Under room temperature environment, 0.25g carboxymethyl chitosan (the degree of carboxymethyl substitution is 91%, the degree of deacetylation is 90%, the weight average molecular weight is 100,000) is dissolved in deionized water, and on the magnetic stirrer Stir for 10 min at a rotating speed of 1000 rpm to obtain a carboxymethyl chitosan solution with a concentration of 0.1 wt%. 0.17g of silver nitrate and 0.18g of glucose were respectively dissolved in deionized water to obtain a silver salt solution and a reducing agent solution with a concentration of 1 wt%.

[0052] The evenly stirred carboxymethyl chitosan solution was placed in a microwave radiation instrument, the microwave radiation power was adjusted to 900W, and the radiation temperature was 80°C. Under the condition of microwave radiation, slowly drop the silver salt solution into the carboxymethyl chitosan...

Embodiment 2

[0058] 1. Preparation of nano silver-based antibacterial and antifungal agent for wood and bamboo

[0059] Under room temperature environment, 1g carboxymethyl chitosan (the carboxymethyl substitution degree is 95%, the degree of deacetylation is 95%, the weight average molecular weight is 50,000) is dissolved in deionized water, and on the magnetic stirrer with Rotate at 1500 rpm, stir for 20 min to obtain a carboxymethyl chitosan solution with a concentration of 0.5 wt%. 0.34g of silver nitrate and 0.72g of fructose were dissolved in deionized water respectively to obtain a silver salt solution and a reducing agent solution with a concentration of 1 wt%.

[0060] The evenly stirred carboxymethyl chitosan solution was placed in a microwave radiation instrument, the microwave radiation power was adjusted to 600W, and the radiation temperature was 70°C. Under the condition of microwave radiation, the silver salt solution was slowly dropped into the carboxymethyl chitosan solut...

Embodiment 3

[0065] 1. Preparation of nano silver-based antibacterial and antifungal agent for wood and bamboo

[0066] Under room temperature environment, 1g carboxymethyl chitosan (the degree of carboxymethyl substitution is 80%, the degree of deacetylation is 85%, the weight average molecular weight is 20,000) is dissolved in deionized water, and on the magnetic stirrer Rotate at 1500 rpm and stir for 20 min to obtain a carboxymethyl chitosan solution with a concentration of 1 wt%. 0.34g of silver nitrate and 0.36g of glucose were respectively dissolved in deionized water to obtain a silver salt solution and a reducing agent solution with a concentration of 0.5wt%.

[0067] The evenly stirred carboxymethyl chitosan solution was placed in a microwave radiation instrument, the microwave radiation power was adjusted to 800W, and the radiation temperature was 60°C. Under the condition of microwave radiation, the silver salt solution was slowly dropped into the carboxymethyl chitosan soluti...

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Abstract

The invention relates to an environment-friendly long-acting type nano-silver base wood and bamboo material antibacterial mould inhibitor and a preparing method and application thereof. The antibacterial mould inhibitor is rapidly prepared with carboxymethyl chitosan, silver salt and a reducing agent serving as raw materials and water serving as a solvent through an efficient microwave radiation method. According to the prepared nano-silver base wood and bamboo material antibacterial mould inhibitor, silver nanoparticles are uniform in particle size and are evenly distributed in a carboxymethyl chitosan base, and agglomeration is not likely to happen; the nano-silver base wood and bamboo material antibacterial mould inhibitor can be well combined with a wood and bamboo material, has high wide spectrum efficiency and is high in loss resistance and durable in antibacterial effect; and in addition, the particle size is small and viscosity is low so that the antibacterial mould inhibitor can better enter a processed material. According to the method, the raw materials are cheap, the technology is simple, operation is convenient, the production efficiency is high, the product reproducibility is high, no complex and expensive equipment is needed, no pollution is caused to the environment, energy consumption is reduced, and industrial popularization is facilitated.

Description

technical field [0001] The invention relates to the field of antibacterial and antifungal agents for wood and bamboo, in particular to an environment-friendly and long-acting nano silver-based antibacterial and antifungal agent for wood and bamboo, a preparation method and application thereof. Background technique [0002] Wood and bamboo materials have the advantages of beautiful texture, high strength-to-weight ratio, strong processability, and natural degradation. They are widely used in architectural decoration, garden landscape, packaging and transportation, furniture, flooring and other industries. However, as a natural biological material, wood and bamboo tend to become the carrier of microbial attachment and the medium of transmission during storage, transportation and use. The spread and spread of harmful bacteria seriously endanger human health; the erosion of mold seriously affects the appearance quality and service life of wood and bamboo products, causing econom...

Claims

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Application Information

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IPC IPC(8): B27K3/52B22F9/24B82Y40/00
CPCB22F9/24B27K3/52B27K2240/20B82Y40/00
Inventor 黄思琪许佳琪冯竞楠张扬于志明
Owner BEIJING FORESTRY UNIVERSITY
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