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Reinforcing method utilizing waterlogged wood relics of nanocellulose

A technology of nano-cellulose and cellulose, which is applied in wood processing equipment, wood treatment, impregnated wood, etc., can solve the problems of loss of mechanical strength and color, oxidation of saturated wooden cultural relics, and disappearance of weathering, etc., to achieve bright color and enhanced mechanical properties. Good strength and stability

Active Publication Date: 2017-06-06
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the existing water-saturated wooden cultural relics are seriously oxidized, lose their mechanical strength and color, are difficult to handle, dry and cracked after treatment, deformed or even weathered and disappear.

Method used

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  • Reinforcing method utilizing waterlogged wood relics of nanocellulose
  • Reinforcing method utilizing waterlogged wood relics of nanocellulose
  • Reinforcing method utilizing waterlogged wood relics of nanocellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. The bamboo pulp after bleaching is prepared as 1wt% dispersion liquid and obtains 1wt% crude cellulose dispersion liquid by the method for high-pressure homogenization;

[0046] 2. Then add periodic acid, the mass ratio of cellulose to cellulose is 1:10, heat to 60°C, and stop the reaction after 2 hours of reaction;

[0047] 3. Repeatedly rinse the obtained dispersion with deionized water until it becomes neutral, then use an ultrasonic pulverizer (1500W) to sonicate the dispersion for 0.5h, and configure a cellulose nanofibril solution with a mass fraction of 0.05%;

[0048] 4. Polyethylene glycol is configured as a solution with a concentration of 10%, and mixed with the cellulose nanofibril solution with a mass fraction of 0.05% obtained in step 3 at 5:1 to obtain cellulose nanofibrils and polyethylene glycol Alcohol hardening agent;

[0049] 5. Polyethylene glycol (PEG) is configured as a solution with a molecular weight of 30000, and mixed with the solution obt...

Embodiment 2

[0053] 1. Bleached bamboo pulp is purchased in the market, crushed through an 80-mesh sieve, prepared into a 1wt% dispersion, and stored at 4°C;

[0054] 2. Take 400ml of the above dispersion liquid, stir evenly, add maleic acid, the molar ratio of cellulose to 20:1, disperse evenly, heat to 90°C, and the reaction time is 120min;

[0055] 3. Repeatedly rinse the obtained dispersion with deionized water until it becomes neutral, then use an ultrasonic pulverizer (1500W) to sonicate the dispersion for 1 hour, and prepare a cellulose nanofibril solution with a mass fraction of 0.1%;

[0056] 4. Polyethylene glycol is configured as a solution with a concentration of 25%, and mixed with the cellulose nanofibril solution with a mass fraction of 0.1% obtained in step 3 at a ratio of 1:1 to obtain cellulose nanofibrils and polyethylene glycol Alcohol hardening agent;

[0057] 5. Simply clean the water-saturated wooden cultural relics, cut them into 2×2×2cm water-saturated small woode...

Embodiment 3

[0060] 1. Bought absorbent cotton on the market, crushed it through an 80-mesh sieve, prepared it into a 1wt% dispersion, and stored it at 4°C;

[0061] 2. Take 400ml of the above dispersion, stir it evenly, add Tempo0.064g and NaBr0.4g, after the dispersion is uniform, add 2MNaClO, use 0.5MNaOH to control the pH of the dispersion at 10.2, react for 1h, then add 25ml of ethanol to terminate the reaction;

[0062] 3. Repeatedly rinse the obtained dispersion with deionized water to neutrality, then use an ultrasonic pulverizer (1500W) to sonicate the dispersion for 2 hours, and configure a cellulose nanofibril solution with a mass fraction of 0.02%;

[0063] 4. Polyethylene glycol is configured as a solution with a concentration of 30%, and mixed with the cellulose nanofibril solution with a mass fraction of 0.02% obtained in step 3 at 10:1 to obtain cellulose nanofibril and polyethylene glycol Alcohol hardening agent;

[0064] 5. Polyethylene glycol (PEG) is configured as a so...

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Abstract

The invention discloses a reinforcing method utilizing waterlogged wood relics of nanocellulose. The reinforcing method comprises the following steps of: mixing nanocellulose with a filling agent to obtain a reinforcing agent; and performing dehydrating and desalination on the waterlogged wood relics, and adding the waterlogged wood relics into the reinforcing agent to soak, and performing drying for reinforcing. The waterlogged wood relics obtained by treatment of the reinforcing method are bright in color, are good in stability, do not easily separate out salts, and are especially free of secondary acid degradation. The reinforcing method disclosed by the invention can be used for effectively clearing and protecting the reinforcing method, the dried and reinforced wood is stabilized to a pH neutral state, acid corrosion and salt separation are effectively restrained, and mechanical strength of highly rotten wood is greatly reinforced.

Description

technical field [0001] The invention relates to a reinforcement method for saturated wooden cultural relics, in particular to the preparation of a reinforcement based on nano-cellulose with different shapes and surface carboxyl functional groups, and for saturated wood relics with high water content, high water content of cell walls, severe degradation, and poor mechanical strength. Methods of processing water and wooden cultural relics. Background technique [0002] The protection of wooden cultural relics is an important and difficult point in the field of archaeology. The fate of some cultural relics unearthed from offshore salvage and marine strata is still in jeopardy. When the water-saturated wooden relics are unearthed, the moisture content of the coniferous wood is 100%-500%, and the moisture content of the broad-leaved wood is as high as 200%-1000%. The structure, chemical composition, and mechanical properties of the wood are greatly damaged. . The main problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/50B27K3/52B27K5/04
CPCB27K3/50B27K3/52B27K5/04
Inventor 卢芸董梦妤殷亚方张永刚姜笑梅焦立超
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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