Natural lignocellulose material with modified zinc oxide and preparation method thereof

A technology of lignocellulose and zinc oxide modification, which is applied in the field of composite materials to achieve the effect of improving the resistance to light discoloration

Inactive Publication Date: 2010-03-03
国际竹藤网络中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for a long time, countless scholars have used various physical or chemical methods such as surface coating, heat treatment, and chemical agent impregnation modification to improve the functionality of lignocellulosic materials, and have achieved many meaningful results, but so far there is still no one. The method can significantly improve the anti-photochromic performance, anti-mildew performance and antibacterial performance of the above materials at the same time

Method used

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  • Natural lignocellulose material with modified zinc oxide and preparation method thereof
  • Natural lignocellulose material with modified zinc oxide and preparation method thereof
  • Natural lignocellulose material with modified zinc oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take bamboo as the processing object, and process it according to the following steps:

[0037](1) preparation molar concentration is the ethanolic solution of zinc acetate dihydrate of 0.015mol / L, and the pH value is adjusted to 12.5 with potassium hydroxide solution;

[0038] (2) Under room temperature conditions, the solution prepared by (1) is impregnated into the inside of the bamboo by vacuum pressurization method (vacuumizing and then pressurizing the liquid), the impregnation time is 4h, and the wet state weight gain rate is 90%. , and then dried at 100°C for 3 hours, repeated 3 times;

[0039] (3) Zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) growth solution, the pH value of the solution is controlled at 6.8 with ammonia water, and the storage temperature is 3-5° C.;

[0040] (4) Under the conditions of 5° C. and normal pressure, inject the growth liquid into the inside of the sample after (3) treatment, so that the wet weight gain rate after treatment is ...

Embodiment 2

[0047] Timber is the processing object, and it is processed according to the following steps:

[0048] (1) preparation molar concentration is the ethanolic solution of zinc acetate dihydrate of 0.01mol / L, and the pH value is adjusted to 11 with potassium hydroxide solution;

[0049] (2) At room temperature, the seed solution prepared in (1) is impregnated into the interior of the wood by vacuum method, the impregnation time is 2 hours, the wet state weight gain rate is above 100%, and then dried at 100°C for 3 hours , repeated 3 times;

[0050] (3) Zinc nitrate hexahydrate [Zn(NO 3 ) 2 ·6H 2 O] growth solution, the pH value of regulating solution with ammonia water is controlled at 6.8;

[0051] (4) Under the condition of room temperature, the growth solution is injected into the inside of the sample after the treatment in (3) by vacuum pressurization method, so that the wet weight gain rate after treatment is about 120%.

[0052] (5) Immediately after taking out the trea...

Embodiment 3

[0056] Timber is the processing object, and it is processed according to the following steps:

[0057] (1) Prepare zinc nitrate hexahydrate [Zn(NO 3 ) 2 ·6H 2 O] growth solution, the pH value of regulating solution with ammonia water is controlled at 6.8;

[0058] (2) Under the condition of room temperature, the growth liquid is immersed into the inside of the sample by vacuum pressurization method, so that the wet weight gain rate after treatment is about 120%.

[0059] (3) Treat the treated wood in an oven at 95° C. for 6 hours after taking it out. Finally, balance to the desired moisture content.

[0060] The treated wood and the untreated same wood were all placed in a high-humidity airtight environment with a relative humidity of 95%. The treated wood was placed for 30 days without mold growth, and the untreated wood began to appear mold spots after being placed for 1 day. Apparently, the anti-mold performance of the material is significantly improved after nano-zinc...

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Abstract

The invention relates to a natural lignocellulose material with modified nano zinc oxide and a preparation method thereof. The method prepares the natural lignocellulose material with modified nano zinc oxide by impregnating natural lignocellulose material with zinc salt solution by means of constant pressure, vacuum or vacuum pressure, and then conducting heat treatment on the material obtained through impregnation at the temperature of 70-120 DEG C for 1-6h. Being simple and effective, the preparation method not only maintains the color, texture and structure of natural lignocellulose material totally, but also improves the resistance to photochromism by 10-20 times and improves mildewproof performance by 25-30 times and changes unavailable antibacterial performance to over 99 percent sterilization rate of colibacillus, candida albicans and other strains. The natural lignocellulose material with modified nano zinc oxide can be widely applied outdoors, and in indoor basements, hospitals and other places that have high requirement on the anti-aging, mildewproof and antibacterial performances of the material.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a zinc oxide modified natural lignocellulose material and a preparation method thereof. Background technique [0002] Natural lignocellulosic materials refer to a class of natural plant materials containing lignin, cellulose, and hemicellulose, typical representatives of which include wood, bamboo, rattan, and various hemp plants. The above materials all contain a certain amount of lignin, and lignin is easy to produce chromogenic quinone groups under the irradiation of sunlight, thereby changing the color of the material surface; moreover, lignin will produce aromatic groups after absorbing ultraviolet rays in sunlight Or other free radicals, these active groups will cause the degradation of lignin and the photo-oxidation of cellulose and hemicellulose, resulting in discoloration of the surface of the material, and even degradation and cracking; in addition, lignocellulosic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H5/04
Inventor 余雁江泽慧宋烨王戈田根林
Owner 国际竹藤网络中心
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