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Method for improving paper strengthening effect of bacterial cellulose-based paper strengthening agent

A bacterial cellulose and enhancer technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, enhancer addition, fiber raw material treatment, etc., can solve the problem of reducing paper air permeability, increasing paper production cost, bacterial cellulose In order to achieve the effect of improving the enhancement effect, reducing the dosage, and improving the effect of enhancing the physical properties of the paper

Active Publication Date: 2016-09-28
广州造纸股份有限公司
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AI Technical Summary

Problems solved by technology

However, to achieve a certain paper enhancement effect, the amount of bacterial cellulose used in paper is still relatively large, and it causes two problems.
On the one hand, the price of bacterial cellulose is relatively expensive, which increases the production cost of paper; on the other hand, adding a large amount of bacterial cellulose will reduce the air permeability of paper

Method used

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  • Method for improving paper strengthening effect of bacterial cellulose-based paper strengthening agent

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Cut 20 g of bacterial cellulose wet film secreted by Glucoacetobacter xylinus cultured by static fermentation into small pieces, add it to 100 mL of water, use a tissue grinder to separate into small pieces, and let it stand for a while After the solution is still not suspended in water, add 100 mL of sodium hydroxide solution with a mass fraction of 4.5% to make the solid content of bacterial cellulose in the system reach 0.15%, and stir the system with a magnetic stirrer at room temperature for 30 min; add 0.024 mL of 3-chloro-2-hydroxypropyltrimethylammonium chloride 65wt% aqueous solution, so that the molar ratio of glucose monomer in bacterial cellulose to 0.1:1, heated to 40 ° C in a magnetic stirrer Under the conditions, the reaction was stirred for 6 hours; the system was separated from the solid and liquid using a centrifuge at 5000 rpm, and 200 mL of 0.005 M hydrochloric acid solution was added to wash the cationized bacterial cellulose for several times until ...

Embodiment 2

[0030] Cut 10 g of bacterial cellulose wet film secreted by Glucoacetobacter xylinus cultured by static fermentation into small pieces, add it to 100 mL of water, use a tissue grinder to separate into small pieces, and let it stand for a while Afterwards, it was still not suspended in water, and then 100 mL of sodium hydroxide solution with a mass fraction of 3% was added to make the solid content of bacterial cellulose in the system reach 0.075%, and the system was stirred for 30 min with a magnetic stirrer at room temperature; 0.24 mL of 3-chloro-2-hydroxypropyltrimethylammonium chloride 65 wt% aqueous solution, so that the molar ratio of glucose monomer in bacterial cellulose to 0.5:1, heated to 50 °C in a magnetic stirrer Under the conditions of stirring for 4 hours; the system was separated from the solid and liquid using a centrifuge at 5000 rpm, and 200 mL of 0.005 M hydrochloric acid solution was added to wash the cationized bacterial cellulose several times until the l...

Embodiment 3

[0032]Cut 30 g of bacterial cellulose wet film secreted by Glucoacetobacter xylinus cultured by static fermentation into small pieces, add it to 100 mL of water, use a tissue grinder to separate into small pieces, and let it stand for a while Afterwards, it was still not suspended in water, and then 100 mL of sodium hydroxide solution with a mass fraction of 6% was added to make the solid content of bacterial cellulose in the system reach 0.225%, and the system was stirred with a magnetic stirrer at room temperature for 30 min; 0.72 mL of 3-chloro-2-hydroxypropyltrimethylammonium chloride 65 wt% aqueous solution, so that the molar ratio of glucose monomer in bacterial cellulose to 1:1, heated to 60 °C in a magnetic stirrer Under the conditions of stirring for 2 hours; the system was separated from the solid and liquid using a centrifuge at 5000 rpm, and 200 mL of 0.005 M hydrochloric acid solution was added to wash the cationized bacterial cellulose several times until the liqu...

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Abstract

The invention discloses a method for improving a paper strengthening effect of a bacterial cellulose-based paper strengthening agent. Bacterial cellulose disclosed by the invention is cellulose secreted by bacterial microbes and synthesized under different culture conditions, and has an English name of Bacterial Cellulose (BC for short). The microbes secreting the cellulose comprise acetobacter, agrobacterium, pseudomonas, achrombacter, alcaligenes, aerobacter, azotobacter, rhizabium, sarcina and the like. The paper strengthening agent refers to an assistant which is added in the paper making process of wood fibers, non-wood vegetable fibers or secondary fiber pulp and can be used for strengthening physical properties of paper. According to the method for improving the effect of the bacterial cellulose-based paper strengthening agent, disclosed by the invention, quaternary ammonium salt cationic modification is performed on the bacterial cellulose, so that the effect of strengthening the physical properties of the paper by the bacterial cellulose can be greatly improved or the consumption of the bacterial cellulose is reduced while an equivalent strengthening effect is achieved.

Description

technical field [0001] The invention relates to the field of paper reinforcement, in particular to a method for improving the paper reinforcement effect of a bacterial cellulose-based paper reinforcement agent. Background technique [0002] Secondary fiber and non-wood fiber raw materials occupy a very large proportion in my country's paper industry. However, most secondary fiber and non-wood fiber-based papers have slightly lower physical properties and cannot meet the needs of modern industry for high-performance paper-based composite materials. Therefore, it is of great significance to develop high-efficiency paper reinforcing agents. [0003] Bacterial cellulose is an emerging biological material, which is secreted and synthesized by microorganisms. It has extremely high cellulose purity and crystallinity, and a fine microscopic network structure. It can effectively improve the physical strength of paper when it is combined with plant fibers to form paper. However, to a...

Claims

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Application Information

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IPC IPC(8): D21H21/18D21H13/00
CPCD21H13/00D21H21/18
Inventor 项舟洋吕发创
Owner 广州造纸股份有限公司
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