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Preparation method for anti-aging composite materials of sleepers

A composite material and anti-aging technology, applied in the field of track materials, can solve the problem of low anti-aging performance, and achieve the effects of enhancing anti-aging performance, improving anti-aging performance and reducing expansion rate

Active Publication Date: 2017-10-24
赖尚辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problem that the anti-aging performance of existing sleeper composite materials is low and cannot meet the needs of existing sleeper materials, a preparation method of anti-aging sleeper composite materials is provided

Method used

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  • Preparation method for anti-aging composite materials of sleepers

Examples

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Effect test

example 1

[0022] In terms of parts by weight, weigh 45 parts of bentonite, 35 parts of mica powder and 10 parts of titanium dioxide respectively and place them in a ball mill jar. : 10, mix the mixed ball mill powder and 5% aluminum sulfate solution by mass fraction, and disperse ultrasonically for 10 min at 200W to obtain a dispersion; mix bamboo and poplar wood with a mass ratio of 1:1 and airflow crush, pass through 50 mesh Sieve the mixed fiber, mix the mixed fiber with deionized water at a mass ratio of 1:10, stir and disperse to obtain a fiber mixed solution, add 5% hydrogen peroxide dropwise to the fiber mixed solution at a volume ratio of 1:20, stir After mixing for 20 minutes, the modified solution was obtained, and then according to the enzyme dosage of 20 U / g, xylanase was added to the modified solution, heated in a water bath at 50°C for 25 minutes, and then 5% sodium hydroxide solution was added dropwise to pH 8.0, after stirring and mixing for 2 hours, the enzymolysis mixt...

example 2

[0024] In terms of parts by weight, weigh 47 parts of bentonite, 37 parts of mica powder and 12 parts of titanium dioxide respectively and place them in a ball milling tank. : 10, mixing the mixed ball mill powder with mass fraction 5% aluminum sulfate solution, and ultrasonically dispersing at 250W for 12 minutes to obtain a dispersion; according to the mass ratio of 1:1, moso bamboo and poplar wood were mixed and jet-pulverized, and passed through 50 mesh Sieve the mixed fiber, mix the mixed fiber with deionized water at a mass ratio of 1:10, stir and disperse to obtain a fiber mixed solution, add 5% hydrogen peroxide dropwise to the fiber mixed solution at a volume ratio of 1:20, stir After mixing for 22 minutes, the modified solution was obtained, and then according to the enzyme dosage of 20 U / g, xylanase was added to the modified solution, heated in a water bath at 52°C for 27 minutes, and then 5% sodium hydroxide solution was added dropwise to pH 8.0, after stirring and...

example 3

[0026]In terms of parts by weight, weigh 50 parts of bentonite, 40 parts of mica powder and 15 parts of titanium dioxide respectively and place them in a ball mill jar. : 10, mixing the mixed ball mill powder with mass fraction 5% aluminum sulfate solution, and ultrasonically dispersing at 300W for 15min to obtain a dispersion; according to the mass ratio of 1:1, moso bamboo and poplar wood were mixed and jet-pulverized, and passed through 50 mesh Sieve the mixed fiber, mix the mixed fiber with deionized water at a mass ratio of 1:10, stir and disperse to obtain a fiber mixed solution, add 5% hydrogen peroxide dropwise to the fiber mixed solution at a volume ratio of 1:20, stir After mixing for 25 minutes, the modified solution was obtained, and then according to the enzyme dosage of 20 U / g, xylanase was added to the modified solution, heated in a water bath at 55°C for 30 minutes, and then 5% sodium hydroxide solution was added dropwise to pH 8.0, after stirring and mixing fo...

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Abstract

The invention belongs to the technical field of track materials, and particularly relates to a preparation method for anti-aging composite materials of sleepers. According to the preparation method, bentonite, mica and titanium dioxide are mixed and ball-milled, dispersed into modified liquid and then stirred at a high speed to uniformly fill wood fiber cells subjected to enzymolysis treatment, the interiors of the wood fiber cells are fully swelled and filled, and therefore the effect of physically shielding ultraviolet light is achieved, the penetration rate of the ultraviolet light in the wood is effectively reduced, and the anti-aging performance of the wood material in an ultraviolet light environment is improved. Meanwhile, the wood material is subjected to hot pressing treatment, and due to high temperature and enzymolysis treatment, fibers of wood residues are fully hydrolyzed; and due to the fact that the internal cellulose cells are filled with the filler, the thickness swelling rate of water absorption is effectively reduced, redundant internal stress in the materials is released, and the aging resistance of the composite materials of the sleepers is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of track materials, and in particular relates to a preparation method of an anti-aging sleeper composite material. Background technique [0002] Due to the rapid development of the global economy and the development of new materials, the research on sleepers is no longer limited to traditional wooden sleepers and reinforced concrete sleepers. More and more new technologies and new composite materials are emerging. Among them, Wood composite materials are becoming more and more accepted by people, and the application places and environments are becoming wider and wider, and new challenges follow. In recent years, there are more and more researches on wood composite materials, and due to the influence of external climate conditions, aging performance is a very important test for the performance of wood composite materials, mainly because it often determines the service life of the material. This also prompts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/08D21C5/00E01B3/44
CPCB27N1/00B27N3/08D21C5/00D21C5/005E01B3/44
Inventor 刘叶季美
Owner 赖尚辉
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