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Superfine cellulose modified material and preparation method thereof

A technology of ultra-fine cellulose and modified materials, applied in the field of cellulose materials, can solve problems such as insufficient chemical modification of cellulose surface, and achieve the effect of improving product purity and process efficiency

Active Publication Date: 2020-09-01
派恩(中山)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the problem of insufficient chemical modification of the above-mentioned cellulose surface, to provide a kind of ultrafine cellulose modified material with high product purity and high process efficiency and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present embodiment provides a kind of preparation method of superfine cellulose modified material, comprises the following steps:

[0029] Prepare 50g / m from 20kg of bleached softwood pulp through a semi-automatic paper machine 2 The coiled material; wherein, the drying temperature of the cellulose coiled material is 85°C, the length of the bleached softwood pulp fiber is 2-4 mm, and the diameter is 25-50 μm;

[0030] The above-mentioned cellulose coil is immersed in a sodium persulfate solution with a mass concentration of 5%, and deliquored and dried;

[0031] Place the above-mentioned cellulose coil impregnated with sodium persulfate in 60 Under Coγ-rays, in an oxygen-free radiation environment, the first irradiation is carried out, and the irradiation dose is 20kGy;

[0032] The cellulose coil after the first irradiation is immersed in the aqueous solution of dimethylaminoethyl methacrylate / acrylic acid, and deliquified and dried. Wherein, the mass ratio of d...

Embodiment 2

[0036] The present embodiment provides a kind of preparation method of superfine cellulose modified material, comprises the following steps:

[0037] 20kg bleached hardwood pulp is prepared by semi-automatic paper machine to 30g / m 2 The sheet material; wherein, the drying temperature of the cellulose sheet is 85°C, the fiber length of the bleached hardwood pulp is 0.8mm-1.5mm, and the diameter is 5μm-10μm;

[0038] Spray a sodium persulfate solution with a mass concentration of 2% on the fiber sheet;

[0039] The above-mentioned fiber sheet after the above-mentioned sodium persulfate spray is placed in 60 Under Coγ-rays, the first irradiation is carried out, and the irradiation dose is 20kGy in an oxygen-free radiation environment;

[0040] Spray the ethanol aqueous solution of glycidyl methacrylate / dimethylacrylamide / methacrylic acid on the cellulose sheet after the first irradiation, wherein glycidyl methacrylate, methacrylamide and The mass ratio of methacrylic acid is 3...

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PUM

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Abstract

The invention relates to a method for preparing an ultrafine cellulose modified material. The method comprises the following steps: processing a cellulose raw material through a papermaking technologyto form a cellulose sheet or a cellulose coil; processing the cellulose sheet or the cellulose coil with a radiation sensitizer; carrying out first-stage radioactive ray radiation on the processed cellulose sheet or cellulose coil in an oxygen-free radiation environment; processing the cellulose sheet or the cellulose coil with a solution containing an organic compound; carrying out second-stageradioactive ray radiation on the cellulose sheet or the cellulose coil in a radiation environment; and carrying out jet milling on the cellulose sheet or the cellulose coil to obtain the ultrafine cellulose modified material. The ultrafining and the surface modification of the cellulose can be simultaneously carried out in order to change the chemical properties of the cellulose while changing themicro-scale of the product.

Description

technical field [0001] The invention relates to cellulose materials, in particular to superfine cellulose modified materials and a preparation method thereof. Background technique [0002] Cellulose is a macromolecular polysaccharide composed of glucose units. Because it contains a large number of hydroxyl groups, it is hydrophilic. At present, cellulose has been prepared into ultrafine cellulose with a size of micronano level and high specific surface area through various methods. As a green additive, it is used in the application research of polymer materials (rubber, plastic, fiber) reinforcement and light weight. . However, in order to further improve the binding force and compatibility of ultrafine cellulose with other polymer materials, it is necessary to modify it. [0003] In the prior art, chemical methods are mostly used for modification of ultrafine cellulose, which require the addition of initiators or catalysts, and are carried out at elevated temperatures, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H25/06D21B1/06D21H19/20
CPCD21B1/06D21H19/20D21H25/06
Inventor 苏杰龙苏敏超
Owner 派恩(中山)科技有限公司
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