Reinforced modification method for applying fly ash fiber to paper making process

A fly ash fiber modification technology, applied in the direction of inorganic fiber/sheet, can solve the problem that the combination ability of fly ash fiber and wood pulp fiber cannot be fundamentally improved

Inactive Publication Date: 2011-06-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned invention is helpful to papermaking with fly ash fiber, but it cannot fundamentally improve the bonding ability of fly ash fiber and wood pulp fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 95g of water and 5g of 1799 polyvinyl alcohol into a 250ml stirred and heated reactor, turn on the stirred and heated reactor to a temperature of 85°C to completely dissolve it, and cool down to 65°C after dissolution. Dissolve 5 g of chloroacetic acid with 1 mol / L NaOH solution, add it to the reaction kettle, adjust the pH of the reaction system to 11 with NaOH solution, keep the temperature at constant temperature for 6 hours, adjust the pH to 4 with HCl solution, and cool to room temperature to obtain carboxylated poly vinyl alcohol solution.

[0018] Disperse 0.9g fly ash fiber in 300ml water, add 0.5gKH550, beating for 5 minutes, then add 2.7g of the above-mentioned carboxylated polyvinyl alcohol solution, and add 1.8g wood fiber, continue beating for 10 minutes, and transfer the slurry to Paper is made on a sheet former to obtain a paper sheet in which fly ash fibers and wood fibers are mixed.

Embodiment 2

[0020] Add 95g of water and 5g of 1788 polyvinyl alcohol into a 250ml stirred and heated reactor, turn on the stirred and heated reactor to a temperature of 80°C to completely dissolve it, and then cool down to 70°C after dissolution. Dissolve 3 g of chloroacetic acid with 1 mol / L NaOH solution, add it to the reaction kettle, adjust the reaction system pH=11 with NaOH solution, keep the temperature at constant temperature for 4 hours, adjust pH=4 with HCl solution, and cool to room temperature to obtain carboxylated poly vinyl alcohol solution.

[0021] Disperse 0.45g fly ash fiber in 300ml water, add 0.27gKH550, beating for 5 minutes, then add 2.7g of the above-mentioned carboxylated polyvinyl alcohol solution, and add 2.25g wood fiber, continue beating for 10 minutes, and transfer the slurry to Paper is made on a sheet former to obtain a paper sheet in which fly ash fibers and wood fibers are mixed.

Embodiment 3

[0023] Add 95g of water and 5g of 2499 polyvinyl alcohol into a 250ml stirred and heated reactor, turn on the stirred and heated reactor to a temperature of 85°C to completely dissolve it, and then cool down to 75°C after dissolution. Dissolve 5 g of chloroacetic acid with 1 mol / L NaOH solution, add it to the reaction kettle, adjust the pH of the reaction system to 13 with NaOH solution, keep the temperature at constant temperature for 6 hours, adjust the pH to 2 with HCl solution, and cool to room temperature to obtain carboxylated poly vinyl alcohol solution.

[0024] Disperse 0.9g fly ash fiber in 300ml water, add 0.5gKH550, beating for 10 minutes, then add 1.8g of the above-mentioned carboxylated polyvinyl alcohol solution, and add 1.8g wood fiber, continue beating for 10 minutes, and transfer the slurry to Paper is made on a sheet former to obtain a paper sheet in which fly ash fibers and wood fibers are mixed.

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PUM

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Abstract

The invention discloses a reinforced modification method for applying fly ash fiber to a paper making process, and preparation and application methods of a polyacrylic acid amide modifier for paper making. The reinforced modification method is characterized by comprising the following steps of: performing carboxylation modification on polyvinyl alcohol in a reactor, adding polyvinyl alcohol and deionized water into the reactor, heating to fully dissolve the polyvinyl alcohol, adding chloroacetic acid into the reactor, adding alkali to adjust the pH of the solution to be between 10 and 13, and adding acid 4 to 6 hours later to adjust the pH of the solution to be between 1 and 4 so as to obtain a polyvinyl alcohol solution of which the molecular chain is provided with a carboxyl group; and dispersing the fly ash fiber into water, adding gamma-aminopropyltriethoxysilane for pulping for 5 to 10 minutes, adding the carboxylation modified polyvinyl alcohol solution, adding wood fiber stuff, mixing the stuff uniformly, and making paper on a sheet forming machine so as to obtain finished paper sheets formed by mixing the fly ash fiber with wood fiber. After the method is used for modifying the fly ash fiber, the intensity of fly ash fiber finished paper sheets can be enhanced.

Description

technical field [0001] The invention relates to a method for reinforcing and modifying papermaking by mixing fly ash fiber and wood fiber for papermaking. Background technique [0002] Wood pulp fiber or straw pulp fiber is a bundle structure, and each bundle is composed of many finer fibers. During the papermaking process, the bundle-like fibers are broken into fine fibers by beating, and the surface of the fine fibers has a large amount of Hydrophilic hydroxyl groups, these hydroxyl groups can make the fibers better dispersed in water, and also make the fibers bond with each other through hydrogen bonds. Fly ash fiber is made of fly ash plus flux under high temperature melting, the structure of fly ash fiber is single, the surface is relatively smooth, and cannot be broken into finer fibers, and the hydroxyl content on the surface of fly ash fiber is also higher than that of wood Pulp fiber or straw pulp fiber is much less. This results in poor bonding between fly ash fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/36C03C25/40
Inventor 陈建定马迅王彦华
Owner EAST CHINA UNIV OF SCI & TECH
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