Wood fiber water-absorbent material and preparation method thereof

A water-absorbing material and wood fiber technology, which is applied in the field of materials, can solve problems such as restricting the development of water-absorbing materials, and achieve the effect of practical industrial promotion value, good water absorption and water retention performance, and simple and easy method

Inactive Publication Date: 2011-02-02
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polymer water-absorbent materials are still made of natural oils and oils that are difficult to biodegrade and are increasingly depleted, which seriously restricts the development of water-absorbent materials.

Method used

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  • Wood fiber water-absorbent material and preparation method thereof
  • Wood fiber water-absorbent material and preparation method thereof
  • Wood fiber water-absorbent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 45-mesh wood fiber and water according to the mass ratio of 1:100, boil for 3 hours, then suction filter and wash with water, repeat this step 3 times, and dry the wood fiber after this process until it is absolutely dry to obtain absolute dry wood fiber. fiber.

[0030] Boil the above-mentioned dry wood fiber with water with a bath ratio of 1:100 for 2 hours and then dry it, then mix the activation treatment agent with liquid ammonia-acetone, stir and replace 3 times at a bath ratio of 1:2, and dry to dryness;

[0031] Mix according to the mass ratio of dry wood fiber and water as 1:100, and add acrylic acid (AA) according to the mass ratio of dry wood fiber to acrylic acid (AA) monomer as 1:7 at a temperature of 65°C under nitrogen protection monomer, and then add the initiator KMnO successively 4 and H 2 SO 4 , so that KMnO 4 Concentration reaches 15mmol / L, H 2 SO 4 The concentration reached 18mmol / L, stirred and reacted for 240 minutes, washed with water a...

Embodiment 2

[0033] Mix 45-mesh wood fiber and water according to the mass ratio of 1:100, boil for 3 hours, then suction filter and wash with water, repeat this step 3 times, and dry the wood fiber after this process until it is absolutely dry to obtain absolute dry wood fiber. fiber.

[0034] Boil the above-mentioned absolute dry wood fiber with water with a bath ratio of 1:100 for 2 hours and then dry it, then use a NaOH solution with a mass concentration of 20% at a bath ratio of 1:50 at a temperature of 68±1°C for 2 hours to activate , dried to absolute dryness;

[0035] Mix according to the mass ratio of dry wood fiber and water as 1:100, and add acrylic acid (AA) according to the mass ratio of dry wood fiber to acrylic acid (AA) monomer as 1:7 at a temperature of 65°C under nitrogen protection monomer, and then add the initiator KMnO successively 4 and H 2 SO 4 , so that KMnO 4 Concentration reaches 15mmol / L, H 2 SO 4 The concentration reached 18mmol / L, stirred and reacted fo...

Embodiment 3

[0037] Mix 45-mesh wood fiber and water according to the mass ratio of 1:100, boil for 3 hours, then suction filter and wash with water, repeat this step 3 times, and dry the wood fiber after this process until it is absolutely dry to obtain absolute dry wood fiber. fiber.

[0038] Mix according to the mass ratio of dry wood fiber and water as 1:100, and add acrylic acid (AA) according to the mass ratio of dry wood fiber to acrylic acid (AA) monomer as 1:5 at a temperature of 65°C under the protection of nitrogen monomer, and then add the initiator KMnO successively 4 and H 2 SO 4 , so that KMnO 4 Concentration reaches 20mmol / L, H 2 SO 4When the concentration reaches 20mmol / L, stir and react for 240 minutes, wash with water and dry to absolute dryness to obtain the lignocellulosic water-absorbing material (ie graft-copolymerized polyacrylic acid lignocellulosic water-absorbing material). The polymer content was 27.58%.

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Abstract

The invention discloses a wood fiber water-absorbent material and a preparation method thereof. The wood fiber water-absorbent material is prepared from wood fiber serving as a raw material by initiating a wood fiber-grafted acrylic acid (AA) monomer through initiators KMnO4 and H2SO4. The wood fiber water-absorbent material prepared from the renewable and readily available wood fiber serving as the raw material is an environmental-friendly and biodegradable water-absorbent material which has high water absorption and retention performance compared with sodium polyacrylate, wherein the water absorption ratio can reach 64 g/g, and the water retention ratio for 5 hours is over 84 percent at the temperature of 60 DEG C or the time for reaching the maximum water absorption ratio is greatly shortened; moreover, the wood fiber water-absorbent material can be compounded with materials such as a plastic film or artificial leather, and functional compound plastic and leather can be further produced without adding an adhesive, wherein the functional compound plastic and leather have water absorption and retention functions on the one hand and water resistance on the other hand.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a wood fiber water-absorbing material and a manufacturing method thereof. Background technique [0002] After decades of development, polymer water-absorbing materials have been widely used in many fields. In terms of agriculture and forestry, the soil is mixed with certain moisture-absorbing and water-retaining materials, no matter the soil is dry or water-deficient, it can maintain the effective humidity in the soil and promote the growth of crops; in the industrial field, it can be used as optical fiber cables, construction concrete and petroleum. Water-absorbing and leak-proof sealing material in pipeline transportation. [0003] However, polymer water-absorbent materials are still made of natural oils and oils that are difficult to biodegrade and are increasingly depleted, which seriously restricts the development of water-absorbent materials. Finding a renew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00H01B11/22D06N3/04C09K17/32B32B27/08C09K101/00
Inventor 袁纳新庄雪影王贤彬周金亮
Owner SOUTH CHINA AGRI UNIV
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