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Method of adding graphene to improve elastic modulus of paper

A technology of elastic modulus and graphene, which is applied in the manufacturing process of adding graphene to increase the elastic modulus of paper, which can solve the problems of ordinary composite paper with low elastic modulus and unable to meet specific needs.

Inactive Publication Date: 2017-01-11
BEIJING CARBON CENTURY TECH CO LTD
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  • 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 of adding graphene to improve the elastic modulus of paper, 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 of adding graphene to improve elastic modulus of paper
  • Method of adding graphene to improve elastic modulus of paper

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Embodiment 1

[0032] 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 subsequent use; adding 1 weight part of graphene aqueous solution to tap water under stirring, so that the graphene concentration is about If it is 0.5%, add 0.2% sodium dodecylsulfonate as a dispersant, and ultrasonically disperse for 20 minutes. Take 100 parts by weight of pulp, dilute it to about 0.5%, slowly add it into the graphene aqueous solution, stir for 30 minutes, add 0.5% alkyl ketene dimer (AKD) and 1% cationic starch, and stir evenly. Papermaking on the machine, dehydration, drying, aging at about 105°C for about 30 minutes after getting off the machine, to obtain graphene composite paper with high elastic modulus.

Embodiment 2

[0034] 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; adding 1 weight part of graphene aqueous solution to tap water under stirring, so that the graphene concentration is about 1%, add 0.5% sodium dodecylsulfonate as a dispersant, and ultrasonically disperse for 20 minutes. Get 100 parts by weight of pulp, dilute it to about 0.5%, slowly add it to the graphene aqueous solution, stir for 35 minutes, ultrasonically disperse for 5 minutes, add 0.5% alkyl ketene dimer (AKD) and 1% cationic starch, Stir well. Papermaking on the machine, dehydration, drying, aging at about 120°C for about 30 minutes after getting off the machine, to obtain graphene composite paper with high elastic modulus.

Embodiment 3

[0036] 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 degree of beating), for subsequent use; adding 3 parts by weight of graphene aqueous solution to tap water under stirring, so that the concentration of graphene is about 1 %, add 1% sodium dodecylsulfonate as a dispersant, and ultrasonically disperse for 25 minutes. Get 100 parts by weight of pulp, dilute it to about 0.5%, slowly add it to the graphene aqueous solution, stir for 30 minutes, ultrasonically disperse for 5 minutes, add 0.5% alkyl ketene dimer (AKD) and 1% cationic starch, Stir well. Papermaking on the machine, dehydration, drying, aging at about 115°C for about 30 minutes after getting off the machine, to obtain graphene composite paper with high elastic modulus.

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Abstract

The invention discloses a method of adding graphene to improve elastic modulus of paper. The method is characterized in that adsorption combining action between chemical bonds and / or hydrogen bonds formed by graphene molecules and plant fiber and non-plant fiber enhances structural strength of composite paper. High-elastic-modulus graphene paper is obtained through following steps: defibering paper pulp, and pulping for standby use; adding tap water into a graphene water solution for diluting, adding a dispersant, and performing ultrasonic dispersion; diluting the paper pulp, adding the diluted paper pulp into the graphene solution, fully mixing, and dispersing; putting on a machine for papermaking, and drying to obtain the high-elastic-modulus graphene composite paper.

Description

technical field [0001] The invention relates to the preparation of special paper, in particular to a manufacturing process for increasing the elastic modulus of paper by adding graphene. 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 large...

Claims

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Application Information

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IPC IPC(8): D21H17/00D21H21/14D21H21/16D21H21/18D21H21/20
CPCD21H17/00D21H21/14D21H21/16D21H21/18D21H21/20
Inventor 闫立群邢立艳
Owner BEIJING CARBON CENTURY TECH CO LTD
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