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Method for improving paper elasticity modulus through graphene oxide addition

A technology of elastic modulus and graphene, applied in the direction of non-fiber pulp addition, inorganic compound addition, papermaking, etc., can solve the problems of ordinary composite paper with low elastic modulus and unable to meet specific needs

Inactive Publication Date: 2016-12-07
BEIJING CARBON CENTURY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for increasing the elastic modulus of paper by adding graphene oxide, so as to solve the problem in the prior art that the elastic modulus of ordinary composite paper is not high and cannot meet specific needs

Method used

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  • Method for improving paper elasticity modulus through graphene oxide addition
  • Method for improving paper elasticity modulus through graphene oxide addition
  • Method for improving paper elasticity modulus through graphene oxide addition

Examples

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Embodiment 1

[0038] figure 1 A process flow diagram according to one embodiment of the present invention is shown. The method comprises: beating the natural color coniferous pulp with a concentration of 1% to about 20° SR (Shore beating degree) for standby; ultrasonically dispersing 1 weight part of graphene oxide aqueous solution for 20 minutes, and adding a pH value of 4.5 in tap water, so that the concentration of graphene oxide is about 0.5%. Take 100 parts by weight of pulp, dilute it to about 0.5%, adjust the pH value to 4.5, slowly add it to the graphene oxide aqueous solution, stir for 30 minutes, add 0.5% alkyl ketene dimer (AKD) and 1% cationic starch, stir well. The paper is made on the machine, dehydrated and dried, and aged at about 105°C for about 30 minutes after being off the machine to obtain a graphene oxide composite paper with a high elastic modulus. For ease of distinction, the composite paper produced by this process is now named sample 1.

[0039] As a comparativ...

Embodiment 2

[0044] figure 2 A process flow diagram according to one embodiment of the present invention is shown. The method comprises: beating the broad-leaf pulp with a concentration of 1% to about 35°SR (Shore beating degree) for subsequent use; ultrasonically dispersing 1 part by weight of graphene oxide aqueous solution for 20 minutes, and adding a mixture with a pH value of 6.5 under stirring. tap water so that the graphene oxide concentration is about 1%. Take 100 parts by weight of pulp, dilute it to about 0.5%, adjust the pH value to 6.5, slowly add it to the graphene oxide aqueous solution, stir for 35 minutes, ultrasonically disperse for 5 minutes, add 0.5% alkyl ketene dimer (AKD) And 1% cationic starch, stir evenly. The paper is made on the machine, dehydrated and dried, and aged at about 120°C for about 30 minutes after being off the machine to obtain a high elastic modulus graphene oxide composite paper.

Embodiment 3

[0046] image 3 A process flow diagram according to one embodiment of the present invention is shown. The method comprises: beating the wheat straw pulp with a concentration of 2% to about 40 ° SR (Shore beating degree) for subsequent use; ultrasonically dispersing 3 parts by weight of a graphene oxide aqueous solution for 25 minutes, and adding a mixture with a pH value of 4.5 under stirring. In tap water, make the graphene oxide concentration about 1%. Take 100 parts by weight of pulp, dilute it to about 0.5%, adjust the pH value to 4.5, slowly add it to the graphene oxide aqueous solution, stir for 30 minutes, ultrasonically disperse for 5 minutes, and add 0.5% of alkyl ketene dimer (AKD) And 1% cationic starch, stir evenly. Papermaking on the machine, dehydration, drying, aging at about 115°C for about 30 minutes after getting off the machine, to obtain graphene oxide composite paper with high elastic modulus.

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Abstract

The invention relates to a method for improving paper elasticity modulus through graphene oxide addition. The method is characterized in that graphene oxide molecules and plant fiber form chemical bonds and / or hydrogen bonds; the structure intensity of composite paper is enhanced through the adsorption combination effect with non-plant fiber; the high-elasticity-modulus graphene oxide paper is obtained through the processing via the following steps that paper pulp is subjected to defibering and pulping for use; acid or neutral solvents are added into a graphene oxide water solution for dilution; before the dilution, the pH value of the paper pulp is regulated; the diluted paper pulp is added into the diluted graphene oxide solution, so that the paper pulp is sufficiently mixed and scattered; in addition, the pulp is fed onto the machine for papermaking; drying is performed to obtain the high-elasticity-modulus graphene oxide composite paper.

Description

technical field [0001] The invention relates to the preparation of special paper, in particular to a method for increasing the elastic modulus of paper by adding graphene oxide. Background technique [0002] Most of the plant fibers are purified and differentiated by chemical methods to obtain corresponding fiber materials. In the process of pulping and bleaching, due to the dissolution and stripping of plant fibers by chemicals such as alkali and bleaching agents, the fiber strength will decrease, especially the decrease in fiber elastic modulus, which will reduce the elastic modulus of paper, so that Restricted in some applications. [0003] "Graphene" is a monolayer of carbon atoms that combines one carbon atom with three surrounding carbon atoms to form a honeycomb structure. Graphene is the highest quality material found in the world today. It has the following characteristics: the thinnest, 0.35nm, known as the thinnest material in the world today; the largest specif...

Claims

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Application Information

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IPC IPC(8): D21H17/63D21H21/14
CPCD21H17/63D21H21/14
Inventor 闫立群邢立艳
Owner BEIJING CARBON CENTURY TECH CO LTD
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