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Straw base film with heavy metal adsorption function and preparation method thereof

A base film and heavy metal technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of waste of straw resources, limited use of heavy metal removal methods, etc.

Active Publication Date: 2022-05-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a straw-based film with heavy metal adsorption function and its preparation method, which can effectively solve the waste of existing straw resources and the limited use of existing heavy metal removal methods. question

Method used

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  • Straw base film with heavy metal adsorption function and preparation method thereof
  • Straw base film with heavy metal adsorption function and preparation method thereof
  • Straw base film with heavy metal adsorption function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A straw-based film with a heavy metal adsorption function, the preparation method of which comprises the following steps:

[0036] (1) Ultrasonic-assisted steam explosion pretreatment is carried out on the corn stalk raw material, and water washing is carried out to obtain a lignocellulosic material with a loose tissue structure;

[0037] (2) Add dimethyl sulfoxide solution to the lignocellulosic material, swell with planetary stirring for 0.4h, then continue to add tetrabutylammonium hydroxide solution, dimethyl sulfoxide solution and tetrabutylammonium hydroxide solution with a mass concentration of 40% The volume ratio is 2:1, planetary stirring and dissolving for 0.8h, wherein the lignocellulosic material accounts for 4% of the total mass of the dimethyl sulfoxide solution and the tetrabutylammonium hydroxide solution;

[0038] (3) The solution in step (2) is centrifuged at the speed of 8000r / min for 2min, and the supernatant is collected, then, chitosan is added in...

Embodiment 2

[0042] A straw-based film with a heavy metal adsorption function, the preparation method of which comprises the following steps:

[0043] (1) Ultrasonic-assisted steam explosion pretreatment is carried out on the corn stalk raw material, and water washing is carried out to obtain a lignocellulosic material with a loose tissue structure;

[0044] (2) Add dimethyl sulfoxide solution to the lignocellulosic material, planetary stirring and swelling for 0.8h, then continue to add tetrabutylammonium hydroxide solution, dimethylsulfoxide solution and tetrabutylammonium hydroxide solution with a mass concentration of 50% The volume ratio is 5:1, planetary stirring and dissolving for 1.5h, wherein the lignocellulosic material accounts for 7% of the total mass of the dimethyl sulfoxide solution and the tetrabutylammonium hydroxide solution;

[0045] (3) The solution in the step (2) is centrifuged at a speed of 12000r / min for 4min, and the supernatant is collected, then, chitosan is adde...

Embodiment 3

[0049] A straw-based film with a heavy metal adsorption function, the preparation method of which comprises the following steps:

[0050] (1) Ultrasonic-assisted steam explosion pretreatment is carried out on the corn stalk raw material, and water washing is carried out to obtain a lignocellulosic material with a loose tissue structure;

[0051] (2) Add dimethyl sulfoxide solution to the lignocellulosic material, planetary stirring and swelling for 0.5h, then continue to add tetrabutylammonium hydroxide solution, dimethylsulfoxide solution and tetrabutylammonium hydroxide solution with a mass concentration of 45% The volume ratio is 4:1, planetary stirring and dissolving for 1h, wherein the lignocellulosic material accounts for 5% of the total mass of the dimethyl sulfoxide solution and the tetrabutylammonium hydroxide solution;

[0052] (3) The solution in the step (2) is centrifuged at a speed of 10000r / min for 3min, and the supernatant is collected, and then, chitosan is ad...

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Abstract

The invention provides a straw base film with heavy metal adsorption function and a preparation method thereof. The preparation process includes the following steps: subjecting the straw raw material to ultrasonic-assisted steam explosion pretreatment, and washing with water to obtain a lignocellulosic material with loose tissue structure; Add dimethyl sulfoxide solution to the lignocellulosic material, stir and react for 0.4-0.8h, then continue to add tetrabutylammonium hydroxide solution, stir and react for 0.8-1.5h; then centrifuge, collect the supernatant, add shells to the supernatant polysaccharide, stir and react for 0.2-1 h; spread the reacted solution on the substrate, stand and vacuum dry to obtain the base film; soak the base film in deionized water, then take out the base film and dry to obtain the Straw base film. The plastic film can effectively solve the problems of waste of existing straw resources and limited use of existing heavy metal removal methods.

Description

technical field [0001] The invention relates to the technical field of plastic film, in particular to a straw base film with heavy metal adsorption function and a preparation method thereof. Background technique [0002] With the rapid development of China's industrialization process, during the development of industrial production and agricultural production, in the process of machinery manufacturing, chemical industry, electronic production and pesticide use, a large amount of heavy metals are lost into the natural soil. Heavy metals such as lead, copper, and chromium, which are common in heavy metal pollution, can enter the human body through water bodies, food chains, etc., thereby endangering human health. [0003] Soil in nature is an important basis for human survival and development, and is a vital environmental resource. Heavy metal pollution has always been the main pollutant in the soil, and has the characteristics of concealment, long-term impact, bioaccumulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/02C08L5/08B01J20/24
CPCC08J5/18B01J20/24C08J2301/02C08J2405/08
Inventor 姜曼陆远范烨胡翔洲王峰潘宇
Owner SOUTHWEST JIAOTONG UNIV
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