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Method for oxidizing surface of pulp fiber with carboxymethylcellulose loaded with Fe2+

A technology of carboxymethyl cellulose and pulp fiber, which is applied in the field of pulp and paper making, can solve the problems of affecting paper strength, fiber strength reduction, inability to adapt to high temperature, strong alkaline process conditions, etc., to improve tensile strength and reduce The effect of beating energy consumption

Inactive Publication Date: 2019-06-18
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

At present, most people use enzymatic hydrolysis to solve this problem. However, due to the harsh requirements for the reaction environment, biological enzyme preparations cannot adapt to the high temperature and strong alkaline process conditions in the pulping and papermaking process, especially chemical-mechanical pulp, The residual lignin component in unbleached pulp has obvious inhibitory effect on the catalytic performance of biological enzymes; moreover, excessive enzymatic hydrolysis may cause a decrease in fiber strength and affect paper strength. These problems and difficulties limit various Enzymes are more widely used in the paper industry

Method used

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Examples

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Embodiment Construction

[0010] The best embodiment of the present invention will be further described in detail below through specific implementation examples.

[0011] (1) Weigh 0.05kg of CMC into 700L of deionized water, and stir evenly for 20 minutes to fully dissolve the CMC. 50L ferrous sulfate solution (0.132mol L -1 ) into the CMC solution evenly, and the mixture was stirred on the stirrer for 30 minutes at a temperature of 40°C. Preparation of CMC-Fe 2+ Composite catalyst, after treatment by dialysis to remove unadsorbed Fe 2+ .

[0012] (2) Get 30kg of unbleached kraft pulp (absolutely dry) and put it in the prepared CMC-Fe 2+ In the aqueous solution of the composite catalyst, fully stir at room temperature for 10 minutes to make the CMC-Fe 2+ The composite catalyst is evenly adsorbed on the fiber surface. After the filter press treatment, the catalyst loading treatment on the surface of the pulp fiber is completed, and the pulp fiber that has adsorbed the catalyst is readjusted to a c...

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Abstract

The invention discloses a method for oxidizing and modifying the surface of pulp fiber with carboxymethylcellulose (CMC) loaded with Fe2+ and belongs to the field of plant fiber modification. The method is basically characterized in that the CMC serves as the carrier of Fe2+ catalysts to form a Fe2+-CMC compound which is adsorbed and immobilized on the surface of plant fiber. During the process ofoxidizing the fiber, Fenton reagents only oxidize and degrade the cellulose on the surface of the fiber to achieve the aim of surface modification of the fiber, reduce the energy consumption of fiberpulping and further improve the tensile strength of paper.

Description

technical field [0001] The present invention uses carboxymethyl cellulose (CMC) as carrier loading Fe 2+ The catalyst uses Fenton's reagent to oxidize the surface of pulp fibers to achieve the purpose of reducing the energy consumption of pulp beating and improving the bonding strength of fibers, and can be used in the technical field of pulp and papermaking. Background technique [0002] Softwood kraft pulp is widely used in the production of various packaging papers and cultural papers due to its good paper strength. At the same time, the energy consumption of conventional softwood pulp raw materials is restricted to a certain extent. Effectively reducing energy consumption while ensuring the beating effect is one of the important directions for the development of current papermaking technology. At present, most people use enzymatic hydrolysis to solve this problem. However, due to the harsh requirements for the reaction environment, biological enzyme preparations cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/50D06M101/04
Inventor 李群潘丽
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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