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Preparation method of surface-modified ball-milling refined plant fibers

A plant fiber and surface modification technology, which is used in grain treatment, pulping with inorganic alkali, etc., to achieve good application prospects and simple ball milling methods.

Inactive Publication Date: 2013-03-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In conclusion, from the analysis of the current research background, there is no research on the preparation of refined plant fibers by ball milling.

Method used

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  • Preparation method of surface-modified ball-milling refined plant fibers
  • Preparation method of surface-modified ball-milling refined plant fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 100 parts by weight of dried refined kraft softwood pulp board, put it into 4900 parts by weight of water and fully wet it, beat it with a beater to 45 degrees (degree of beating °SR), and filter the obtained pulp to 4600 degrees Parts by weight of water, remaining 400 parts by weight of thick paper pulp, adding 100 parts by weight of sodium hydroxide solid in the thick paper pulp, stirring and dissolving, boiling under stirring for reflux reaction for 1 hour, to obtain a tan solid-liquid mixture, filter, use 20 % sodium hydroxide solution for 1 wash, 4 washes with water, put the filtered filter cake into 100-250 parts by weight of water to disperse, so that the pulp obtained after dispersion is 360 parts by weight, add 40 parts by weight of 30% hydrogen peroxide, Heating to 70 degrees, reacting for 1 hour under strong stirring, filtering, washing twice with water and twice with ethanol, and drying to obtain pretreated wood pulp fiber. Add the pretreated wood pulp ...

Embodiment 2

[0026] Take 100 parts by weight of sisal fiber, put it into a pulverizer and pulverize until the length is less than 1 cm, add 300 parts by weight of 20% sodium hydroxide solution, stir and boil for 3 hours to obtain a black solid-liquid mixture, filter it, and use 20% Sodium hydroxide solution washes 2 times, washes with water 4 times, filter cake is put into the water dispersion of about 100-250 weight part, makes the total weight of dispersion liquid be 360 ​​weight part, then adds 40 weight part 30% hydrogen peroxide therein, Heating to 70 degrees under stirring and bleaching for 1 hour, filtering the product, washing with water for 3 times and ethanol for 2 times, drying to obtain pretreated sisal fiber. Take 100 parts by weight of the pretreated sisal fiber and add it to 300 parts by weight of dimethyl sulfoxide (DMSO), stir and mix evenly, pour it into a ball mill tank, replace the air in the ball mill tank with nitrogen, and then ball mill at 200rpm After 16 hours, the...

Embodiment 3

[0028] Take 100 parts by weight of rice straw, put it into a pulverizer and crush it until the length is less than 1 cm, add 500 parts by weight of 20% sodium hydroxide solution, stir and boil for 3 hours to obtain a black solid-liquid mixture, filter it, and oxidize it with 20% hydroxide The sodium solution was washed twice, and water was washed four times, and the filter cake was dispersed in 100-200 parts by weight of water, so that the total weight of the dispersion was 260 parts by weight, and then 40 parts by weight of 30% hydrogen peroxide was added thereto, heated to 70 degree, bleaching under stirring for 2 hours, filtered, washed twice with water and twice with ethanol, and dried to obtain 50-60 parts by weight of pretreated straw fiber. Take 100 parts by weight of pretreated straw fiber and add it to 300 parts by weight of dimethylformamide (DMF). After stirring and mixing evenly, pour it into a ball mill tank. Carry out 20 hours of ball milling under high temperatu...

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Abstract

The invention relates to a preparation method of surface-modified ball-milling refined plant fibers. According to the preparation method, natural plant fibers are subjected to wet method ball milling after pretreatment, and the original micro-fibers can be scattered along the long-axis direction and broken along the diameter direction, so that the refined plant fibers are obtained. Compared with nano-celluloses prepared by a hydrolysis method, the refined long fibers obtained by the preparation method have the characteristics that the length is long, the length-diameter ratio is greater, and by controlling the ball milling condition, fine fibers and coarse fibers in the product are interconnected to from a net-like structure, and separated single fibers can be obtained. The fiber product does not contain acidic groups remained during preparation by the hydrolysis method. The plant fibers are subjected to appropriate surface modification, and then the surface-modified ball-milling refined plant fibers are prepared. The surface-modified ball-milling refined plant fibers have good application prospects in construction foods, medicaments, chemical industry, papermaking, spinning, new material preparation and the like.

Description

technical field [0001] The invention relates to a method for preparing surface-modified ball-milled refined plant fibers. Background technique [0002] Natural plant fibers such as hemp fiber, coconut shell fiber, straw fiber, bagasse, straw fiber, bamboo and cotton fiber have the characteristics of light weight, cheap, renewable and biodegradable, and can be used as reinforcing materials in polymers. Based composites, endowing polymer composites with the advantages of environmental friendliness and circular economy. The cellulose fiber usually obtained from natural plants is a thick fiber with a diameter of several microns to hundreds of microns, which itself can be regarded as a composite material structure, in which the reinforcing agent is a secondary fiber, including microfiber (fibril), nanofiber Cellulose (nano cellulose), basic fibril (elementary fibril), the matrix is ​​hemicellulose, lignin, pectin, etc. Due to the poor mechanical properties of hemicellulose, li...

Claims

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Application Information

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IPC IPC(8): D21C3/02B02C17/00
Inventor 容敏智贾国梁章明秋
Owner SUN YAT SEN UNIV
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