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Lignin-based grafted modified porous adsorbing material and preparation method thereof

A porous adsorption material, graft modification technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of molecular weight polydispersity, limited large-scale application, complex structure, etc. The effect of improving molecular weight, simple process and good material performance

Inactive Publication Date: 2015-01-21
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lignosulfonate is currently the most widely used lignin product, but its large-scale application is limited due to its complex structure and polydispersity of molecular weight

Method used

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  • Lignin-based grafted modified porous adsorbing material and preparation method thereof
  • Lignin-based grafted modified porous adsorbing material and preparation method thereof
  • Lignin-based grafted modified porous adsorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 4.000g sodium lignosulfonate and 4.000g acrylamide and dissolve in 150ml water, take 8ml acrylic acid and add it to the solution, adjust the pH of the solution to 8.0, seal it, heat up to 80°C and add 0.05g potassium persulfate for 6 hours After cooling to room temperature, the grafted lignosulfonate grafted product was obtained. Take 100ml of liquid paraffin, add 5ml of concentrated hydrochloric acid and 10ml of formaldehyde, and add 1ml of Tween 80, heat up to 80°C, slowly add the above-mentioned grafted lignosulfonate grafted product under stirring conditions, and stop for 5 hours reaction. After opening and heating to 105°C to remove small molecular substances, pass the obtained product through a 60-100 mesh sieve, and fully wash (with acetone, acid solution, lye solution, and distilled water in sequence), and freeze-dry. The quality of the obtained product is 0.0756g . And keep the final product sealed.

Embodiment 2

[0035] Weigh 4.000g of sodium lignosulfonate and 4.000g of acrylamide and dissolve them in 150ml of water, take 8ml of acrylic acid and add it to the solution, adjust the pH of the solution to 8.0, seal it, and add 0.1g of potassium persulfate after heating up to 80°C for 6 hours After cooling to room temperature, the grafted lignosulfonate grafted product was obtained. Take 150ml of liquid paraffin, add 5ml of concentrated hydrochloric acid and 15ml of formaldehyde, and add 2ml of Tween 80, heat up to 80°C, slowly add the above-mentioned grafted lignosulfonate grafted product under stirring conditions, and stop for 5 hours reaction. After opening and heating to 105°C to remove small molecular substances, pass the obtained product through a 60-100 mesh sieve, and fully wash (with acetone, acid solution, lye solution, and distilled water in sequence), and freeze-dry. The quality of the obtained product is 0.129g . And keep the final product sealed.

Embodiment 3

[0037] Weigh 4.000g sodium lignosulfonate and 4.000g acrylamide and dissolve in 150ml water, take 8ml acrylic acid and add it into the solution, adjust the pH of the solution to 8.0, seal it, heat up to 80°C and add 0.15g potassium persulfate for 6 hours After cooling to room temperature, the grafted lignosulfonate grafted product was obtained. Take 200ml of liquid paraffin, add 5ml of concentrated hydrochloric acid and 20ml of formaldehyde, and add 3ml of Tween 80, heat up to 80°C, slowly add the above-mentioned grafted lignosulfonate grafted product under stirring conditions, and stop for 5 hours reaction. After opening and heating to 105°C to remove small molecular substances, pass the obtained product through a 60-100 mesh sieve, and fully wash (with acetone, acid solution, lye solution, and distilled water in sequence), and freeze-dry. The quality of the obtained product is 0.208g . And keep the final product sealed.

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Abstract

The invention discloses a lignin-based grafted modified porous adsorbing material prepared through an inverse suspension polymerization technology and a preparation method thereof. The lignin-based grafted modified porous adsorbing material is prepared by taking sodium lignin sulfonate as a host material, acrylamide and acrylic acid as grafted monomers, potassium persulfate as an initiating agent, formaldehyde used as a cross-linking agent, tween 80 used as a dispersing agent and hydrochloric acid as a catalyst. The lignin-based grafted modified porous adsorbing material disclosed by the invention can be used for increasing the molecular weight and absorption property of lignin by introducing a graft copolymerization short chain on a lignin molecular chain, is enhanced in structural regularity to a certain degree, has the advantages of porous structure, no toxicity of production and solvent recycling and is an environment-friendly adsorbing material.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a lignin graft modified porous adsorption material with high adsorption capacity and a preparation method thereof. Background technique [0002] Lignosulfonate is currently the most widely used lignin product, but its large-scale application is limited due to its complex structure and polydispersity of molecular weight. Faced with the current situation that the main by-products of lignin and its derivatives in my country's papermaking industry have a large output but low utilization rate, combined with lignin and its various derivatives, it has a good adsorption function and can adsorb dyes in wastewater and heavy metal ions, and can be recycled and utilized. The present invention uses cheap natural polymer material lignosulfonate as the adsorbent to prepare the substrate, which will not only generate huge market value, but also enable the secondary utilizat...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J3/24C08L51/00C08F289/00C08F220/06C08F220/54C08F2/32B01J20/24B01J20/30C02F1/28C02F103/30
Inventor 唐裕芳胡涛曾永德周蔷
Owner XIANGTAN UNIV
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