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A kind of modified natural fiber composite material and preparation method thereof

A technology of natural fibers and composite materials, which is applied in the field of composite materials and can solve problems such as cumbersome production processes

Inactive Publication Date: 2018-02-06
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its production process is loaded down with trivial details, and the graft rate of MAPP emulsion is only about 5% (referring to Liu Xiaoye, Dai Gance. The surface treatment of jute fiber felt and its mechanical property of reinforced polypropylene composite material, 2006,23 (5): 63-69 )

Method used

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  • A kind of modified natural fiber composite material and preparation method thereof
  • A kind of modified natural fiber composite material and preparation method thereof
  • A kind of modified natural fiber composite material and preparation method thereof

Examples

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of natural fiber composite material, comprising:

[0037] Step 1: Put the natural fiber in NaOH solution to react first, then put it in cationic surfactant solution to modify it, then place it in the air, and then dry it to obtain the natural fiber with surface modification treatment;

[0038] Step 2: Composite the modified natural fiber and UPE / polypropylene to obtain a natural fiber composite material.

[0039] According to the present invention, the compound method of described modified natural fiber and UPE is:

[0040] Mix UPE resin, curing agent, accelerator and defoamer to obtain a mixture, stir the mixture evenly, preferably put it in an oven to vacuumize for 0-5min, then put it into an ultrasonic wave and mix for 0-5min, and apply the mixture on a modified surface The cured natural fiber cloth is put into the steel plate mold, and the natural fiber composite material is obtained after curing and ...

Embodiment 1

[0051] Cut the linen into 12cm×7.5cm rectangular squares, wash them, dry them naturally for 8 hours, and then dry them in an electric blast drying oven at 100°C for 6 hours to obtain clean linen.

[0052] Weigh 95g of UPE, put 0.13g of cobalt isocyanate, 0.18g of methyl ethyl ketone peroxide and 5g of defoamer (BYK A555) into the weighed UPE, stir evenly, keep in a vacuum oven for 2 minutes, then put Fully mix in ultrasonic for 2 minutes, apply UPE evenly on four pieces of untreated linen cloth layer by layer and place them in a steel mold (12cm×7.5cm×3mm), solidify and form to obtain a natural fiber composite material. The fracture strength of the composite material obtained in Example 1 is 33.12 MPa, the tensile modulus is 3.12GPa, and the impact strength is 7.52KJ / m 2 , 5% thermal weight loss temperature is 224 ℃.

Embodiment 2

[0054] Cut the linen cloth into a 12cm×7.5cm rectangular square, put it in a NaOH solution with a concentration of 2%, soak it at room temperature for 30 minutes, wash it, and then put it in a solution of octadecyltrimethylammonium bromide with a concentration of 5%. In the water bath at 60°C for 30 minutes, wash it, dry it naturally for 8 hours, and then dry it in an electric blast drying oven at 100°C for 6 hours to obtain alkylated linen and modified linen The moisture absorption performance has been improved.

[0055] Weigh 95g of UPE, put 0.13g of cobalt isocyanate, 0.18g of methyl ethyl ketone peroxide and 5g of defoamer (BYK A555) into the weighed UPE, stir evenly, keep in a vacuum oven for 2 minutes, then put Fully mix in ultrasonic for 2 minutes, apply UPE evenly on four pieces of linen cloth that have been treated with alkylation layer by layer, put them into a steel mold (12cm×7.5cm×3mm), solidify and form, and obtain natural fiber composite materials . The fractu...

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Abstract

The invention provides a modified natural fiber composite material and a processing method thereof, belonging to the field of composite materials. The composite material is obtained by compounding the modified natural fiber and UPE / polypropylene; the modified natural fiber is first placed in a NaOH solution for treatment, and then placed in a cationic surfactant solution Chemically modified in the air, then placed in the air, and then dried. The invention also provides a preparation method of the natural fiber composite material. The natural fiber of the present invention is modified by the aqueous phase method, and the fiber is chemically modified by sodium hydroxide and cationic surfactant aqueous solution to increase the hydrophobicity of the fiber, thereby improving the hygroscopicity and interface performance of the natural fiber composite material, and also The mechanical properties of the material can be improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a modified natural fiber composite material and a preparation method thereof. Background technique [0002] Natural fiber composite material is a kind of composite material with resin or plastic as matrix and natural fiber as reinforcement material. Natural fibers mainly include kenaf, jute, flax, white hemp, sisal hemp, abaca, apocynum, ramie, hemp, wood fiber, bamboo fiber, coconut fiber, cotton, kapok fiber, soybean stalk, millet stalk, tobacco stalk, Cotton stalks, sunflower stalks, hemp stalks, sorghum stalks, rice straw, corn stalks, triticale stalks, wheat stalks, and naturally occurring or growing fibers or fabrics woven from fibers with cellulose as the main component. It has the advantages of low density, low price, degradable, non-irritating to the body, recyclable, low loss of processing equipment, rich in resources, low processing energy consumption, energy saving...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L67/06C08L23/12
Inventor 呼微胡求学刘佰军张袅娜吴万民闫雯玲董晨君宋晓峰王元瑞张明耀张会轩马芳武
Owner CHANGCHUN UNIV OF TECH