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Cationization modification method for nano-crystalline cellulose and preparation method of high-strength cigarette paper

A technology of cationic modification and nano-cellulose, which is applied in the field of nano-cellulose cationic modification and modified nano-cellulose to prepare high-strength cigarette paper, which can solve the problems of high reaction temperature and low conversion rate of cationic etherification agent , to achieve the effect of improving paper quality, reducing equipment investment, and reducing energy consumption

Active Publication Date: 2011-09-14
MUDANJIANG HENGFENG PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of reaction generally uses NaOH as the alkali source, and the conversion rate of the cationic etherification agent is not high, and the reaction temperature is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Disperse 100g of nanocellulose into 3L of water, add 5g of KOH, 15g of 2,3-epoxypropyltrimethylammonium chloride and 1.2g of KOH in sequence 2 CO 3 , react at 40° C. for 1 to 2 hours, adjust the pH value of the reaction system to 6 with hydrochloric acid, and obtain a water dispersion of nanocellulose. The nanocellulose aqueous dispersion was precipitated with 300ml of ethanol, and washed successively with 200ml of acetone and 40ml of ether to obtain 112g of white cationic nanocellulose. The conversion rate of 2,3-epoxypropyltrimethylammonium chloride is up to 90% as detected by elemental analysis.

Embodiment 2

[0022] Disperse 100g of nanocellulose into 3L of water, add 5g of KOH, 15g of 2,3-epoxypropyltrimethylammonium chloride and 1.1g of Na 2 CO 3 , react at 40° C. for 1 to 2 hours, adjust the pH value of the reaction system to 6 with hydrochloric acid, and obtain a water dispersion of nanocellulose. The nanocellulose aqueous dispersion was precipitated with 300ml of ethanol, and washed successively with 200ml of acetone and 40ml of ether to obtain 107g of white cationic nanocellulose. The conversion rate of 2,3-epoxypropyltrimethylammonium chloride was 91% as detected by elemental analysis.

Embodiment 3

[0024] Disperse 100 g of nanocellulose into 3 L of water, add 6 g of KOH, 15 g of 3-chloro-2-hydroxypropyltrimethylammonium chloride and 1.1 g of Na 2 CO 3 , react at 40° C. for 1 to 2 hours, adjust the pH value of the reaction system to 6 with hydrochloric acid, and obtain a water dispersion of nanocellulose. The nanocellulose aqueous dispersion was precipitated with 300ml of ethanol, and washed successively with 200ml of acetone and 40ml of ether to obtain 104g of white cationic nanocellulose. The conversion rate of 3-chloro-2-hydroxypropyltrimethylammonium chloride detected by elemental analysis was 81%.

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Abstract

The invention belongs to the field of production of special paper, and in particular relates to a cationization modification method of nano-crystalline cellulose and a method for preparing high-strength cigarette paper from the modified nano-crystalline cellulose. Specific to the characteristic of high specific surface area of nano-crystalline cellulose, KOH and a method for adding an etherification reaction accelerant are adopted, the reaction temperature is lowered below 50 DEG C, cationization modification is performed on the nano-crystalline cellulose, and the modified nano-crystalline cellulose has the characteristics of retention and enhancement, so that the modified nano-crystalline cellulose has a wider application prospect; in the method for preparing cigarette paper, softwood pulp is not used, and higher natural air permeability and higher bonding strength of a product are ensured under the condition of reducing broadleaf wood fiber devillicate and fibrillation, so that energy consumption in the production process of paper, in particular in the pulping process, is remarkably lowered, equipment investment of a paper mill is reduced, high-strength cigarette paper is manufactured, the page quality is improved, higher strength and air permeability of the product are achieved, and the requirements on energy conservation and emission reduction are met.

Description

technical field [0001] The invention belongs to the field of special paper production, and particularly relates to a method for cationic modification of nano-cellulose and a method for preparing high-strength cigarette paper by using the modified nano-cellulose. Background technique [0002] Cigarette paper is a thin packaging material for cigarettes made by wrapping shredded tobacco with cigarette machinery, and it is also a special industrial technical paper that can ensure and control the combustion performance of cigarettes and shredded tobacco. Cigarette paper is the main supporting material of the cigarette industry, and its quality directly affects the benefits of the cigarette production industry. The cigarette industry has the following special technical requirements for cigarette paper: (1) It must have sufficient tensile strength, especially the comprehensive strength of cigarette paper; (2) It must have a high enough air permeability, the air permeability can rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/145D21H17/26D21H21/10D21H21/18
Inventor 李劲松查瑞涛鲍漫秋任万山温思茹
Owner MUDANJIANG HENGFENG PAPER CO LTD
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