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Straw surface treatment and graft modification method

A graft modification and surface treatment technology, applied in reed/straw treatment, wood processing appliances, manufacturing tools, etc., can solve the problems of difficult bonding, modification, and unfavorable large-scale use, and achieve the solution of forest resources and pollution of the environment. , Enhance the effect of physical and chemical combination, which is beneficial to industrial utilization

Inactive Publication Date: 2013-12-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the lye concentration used is high and the cost is not low, and steam explosion and microwave are not conducive to large-scale industrial use
[0007] Patent Publication No. CN101508129A discloses a method for changing the surface wettability of wheat straw or rice straw. Enzymatic fermentation is used to solve the problem of poor wettability of the inner and outer surfaces of wheat straw or rice straw. Production of wheat straw or straw particleboard leads to high cost issues
However, this method has the disadvantages that the reaction time is too long and the conditions are not easy to control.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 100g of straw and wash it with water, put it in a beaker, add 100g of 0.1% mixed lye (the mass ratio of sodium hydroxide and sodium carbonate is 1:9), cook at 30°C for 30min; take out the straw, rinse it with water to pH The test was neutral, dried in an oven at 80°C, pulverized at 1000W power and 1500 rpm for 10 minutes, and ground into powder; weighed 50g of wheat straw powder, added 0.4g of silane coupling agent KH550 and 0.6g A mixed solution of methacrylic acid grafting modifier, 15g ethanol and 20g water was reacted for 10 minutes; dried in an oven at 50°C for 10 minutes to obtain a surface-treated and graft-modified sample of wheat straw (MG-1).

Embodiment 2

[0030] Weigh 100g of straw and wash it with water, put it in a beaker, add 200g of 0.5% mixed lye (the mass ratio of sodium hydroxide and sodium carbonate is 2:8), cook at 40°C for 20min; take out the straw, rinse it with water to pH The test was neutral, dried in an oven at 80°C, pulverized by a pulverizer at a power of 1200W and a speed of 1800 rpm for 5min, and ground into powder; weighed 50g of wheat straw powder, added 0.15g of silane coupling agent KH560 and 0.1g A mixed solution of methacrylic acid grafting modifier, 5g ethanol and 10g water was reacted for 30 minutes; dried in an oven at 70°C for 20 minutes to obtain a surface-treated and graft-modified sample of wheat straw (MG-2).

Embodiment 3

[0032]Weigh 100g of straw and wash it with water, put it in a beaker, add 300g of 0.8% mixed lye (the mass ratio of sodium hydroxide and sodium carbonate is 5:5), cook at 50°C for 45min; take out the straw, rinse it with water to pH The test was neutral, dried in an oven at 80°C, pulverized with a pulverizer at 1300W power and 1600 rpm for 15 minutes, and ground into powder; weighed 50g of wheat straw powder, added 0.2g of silane coupling agent KH570 and 1.8g of The mixed solution of methacrylic acid grafting modifier, 20g ethanol and 20g water was reacted for 40 minutes; dried in an oven at 60°C for 30 minutes to obtain a surface-treated and graft-modified sample of wheat straw (MG-3).

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PUM

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Abstract

The invention belongs to the technical field of crop straw treatment, and relates to straw surface treatment, particularly a straw surface treatment and graft modification method. In order to remove wax and silicon on the straw surface, eliminate the influence that the wax and silicon are unfavorable to adhesion, and enhance the wettability of water for the straw, the invention discloses a straw surface treatment and graft modification method which comprises the following steps: cleaning the straw, carrying out mixed base solution pretreatment, pulverizing the pretreated straw, and adding a silane coupling agent-methacrylic acid mixed graft modifier and an ethanol-water mixed solution to carry out graft modification. The method provided by the invention can remove the wax and silicon on the straw surface, and change the surface properties of the straw; and the treated straw has higher wettability and can enhance the physicochemical cohesive action with various adhesives. The method provided by the invention is also applicable to surface treatment of straws of rice and other crops, and can reinforce the surface wettability of the crop straw.

Description

technical field [0001] The invention belongs to the technical field of crop straw treatment and relates to straw surface treatment, in particular to a method for wheat straw surface treatment and graft modification. technical background [0002] Currently in the world, forest resources are showing a clear trend of reduction, and the supply of timber is in short supply. China is a Shaolin country, the per capita forest area is only 0.112km 2 , per capita forest volume 0.12m 3 , much lower than the current 0.65m 3 world average level. The sustainable development of forest resources is of great significance to the sustainable development of human society. In order to protect forests and ensure the sustainable development of society, people are trying their best to find various wood substitute materials. Among many substitute wood materials, the most popular material with very similar properties to wood is crop straw, among which the annual output of wheat straw ranks first...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00B27K9/00
Inventor 邱凤仙蒋艳徐吉成荣新山杨冬亚
Owner JIANGSU UNIV
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