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Fiber composite containing microfibrillated cellulose and preparation method of fiber composite

A fiber composite material and cellulose technology, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, synthetic cellulose fiber, fiber raw material processing, etc., can solve the problem of high price, loss of mechanical properties of sealing materials, unfavorable fiber composite Sealing material cost control and other issues to achieve the effect of convenient operation, strong applicability, and guaranteed material strength and mechanical properties

Active Publication Date: 2019-08-02
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In consideration of reducing cost and improving heat resistance of materials, it is necessary to increase the content of inorganic fillers in materials as much as possible, but a large increase in fillers will inevitably lead to the loss of mechanical properties of sealing materials, so in order to improve the mechanical strength of materials, it is necessary to add aromatic Fiber, carbon fiber, etc. can be used to strengthen the material, but usually these reinforcing fibers are expensive, which is not conducive to the cost control of fiber composite sealing materials

Method used

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  • Fiber composite containing microfibrillated cellulose and preparation method of fiber composite
  • Fiber composite containing microfibrillated cellulose and preparation method of fiber composite
  • Fiber composite containing microfibrillated cellulose and preparation method of fiber composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Disperse 5 g of microfibrillated cellulose without any substituent (dry quantity, the same below) in water, add 0.025 g of anionic polyacrylamide and stir evenly;

[0025] (2) Disperse the inorganic filler consisting of 30g calcium carbonate, 30g kaolin and 25g talcum powder in water, add 0.003g cationic starch and stir evenly;

[0026] (3) Mix the modified microfibrillated cellulose aqueous dispersion with the modified inorganic filler aqueous dispersion and stir evenly, then add 2g of aramid fiber, 1g of glass fiber, 3g of styrene-butadiene latex, and 2g of nitrile butadiene latex and 2g additives (sulfur: thiazoles: N-phenyl-2-naphthylamine: carbon black: polydimethylsiloxane: aluminum sulfate = 20: 15: 12: 30: 18: 5), formulated into slurry;

[0027] (4) The prepared slurry is made into a wet sheet by a papermaking method, and then dehydrated, dried, and vulcanized to obtain a fiber composite material containing microfibrillated cellulose.

[0028] At the same...

Embodiment 2

[0032] (1) Disperse 10 g of carboxyethyl microfibrillated cellulose with a degree of substitution of 0.2 (dry weight, the same below) in water, add 0.01 g of sodium carboxymethyl cellulose and stir evenly;

[0033] (2) Disperse the inorganic filler composed of 20g mica powder, 40g bentonite and 10g white carbon black in water, add 0.8g polydiallyldimethylammonium chloride and stir;

[0034] (3) Mix the modified microfibrillated cellulose aqueous dispersion with the modified inorganic filler aqueous dispersion and stir evenly, then add 2g carbon fiber, 2g pulp fiber, 1g ceramic fiber, 3g nitrile latex, 4g Neoprene latex, 3g acrylic latex and 5g additives (sulfur: thiazoles: N-phenyl-2-naphthylamine: carbon black: polydimethylsiloxane: aluminum sulfate = 30: 15: 10: 28: 15 : 2), mixed with slurry;

[0035] (4) The prepared slurry is made into a wet sheet by a papermaking method, and then dehydrated, dried, and vulcanized to obtain a fiber composite material containing microfibr...

Embodiment 3

[0040] (1) Disperse 3 g of microfibrillated cellulose oxidized by 2,2,6,6-tetramethylpiperidine nitrogen oxide (TEMPO) with a degree of substitution of 0.05 (dry weight, the same below) in water, add 0.045 g sodium polymethacrylate and stir well;

[0041] (2) Disperse the inorganic filler composed of 20g wollastonite, 50g silicon carbide and 17g barium sulfate in water, add 0.18g cationic polyacrylamide and stir evenly;

[0042] (3) Mix the modified microfibrillated cellulose aqueous dispersion with the modified inorganic filler aqueous dispersion and stir evenly, then add 0.5g acrylic fiber, 0.5g arylsulfone fiber, 3g styrene-butadiene latex, 1g nitrile latex, 2g neoprene latex and 3g additives (sulfur: thiazoles: N-phenyl-2-naphthylamine: carbon black: polydimethylsiloxane: aluminum sulfate=25: 15: 15: 25 :15:5), prepared into slurry;

[0043] (4) The prepared slurry is made into a wet sheet by a papermaking method, and then dehydrated, dried, and vulcanized to obtain a fi...

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Abstract

The invention discloses a fiber composite containing microfibrillated cellulose and a preparation method of the fiber composite. Firstly, the microfibrillated cellulose is modified with an anionic auxiliary, meanwhile, inorganic filler is modified with a cationic auxiliary, then, two modified aqueous dispersions are mixed, fiber, latex and an auxiliary are added, obtained slurry is subjected to papermaking, dewatering, drying and vulcanization, and the fiber composite containing the microfibrillated cellulose is obtained. The method is convenient to operate, simple in process, high in adaptability and favorable for large-scale production. The provided fiber composite containing the microfibrillated cellulose has the advantages that the content of the inorganic filler is high, few expensivereinforced fibers are used and the tensile strength of materials is good.

Description

technical field [0001] The invention belongs to the intersection field of composite materials and fiber materials, and in particular relates to a fiber composite material containing microfibrillated cellulose and a preparation method thereof. Background technique [0002] Composite materials are materials with new properties that are combined macroscopically or microscopically by two or more materials with different properties through physical or chemical methods. Various materials can learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of the composite material is better than that of the original constituent materials to meet various requirements. Fiber composite sealing materials are mainly used to manufacture various sealing gaskets, and are widely used in the sealing of various vehicles, mechanical equipment and various pipeline joints. plays a key role. Currently commonly used fiber composite sealing mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/04D21H13/02D21H17/69D21H17/21D21H13/26D21H13/40D21H17/40D21H17/09D21H17/07D21H17/67D21H17/59D21H17/66D06M15/285D06M101/06D06M101/08
CPCD06M15/285D06M2101/06D06M2101/08D21H13/02D21H13/04D21H13/26D21H13/40D21H17/07D21H17/09D21H17/21D21H17/40D21H17/59D21H17/66D21H17/67D21H17/69
Inventor 刘金刚庄金风陈京环李红苏艳群羡羽佳
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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