Biomass-based thermosensitive bionic hydrogel adsorption material as well as preparation method and application thereof

An adsorption material and biomass technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problem of harmful compounds, etc., to achieve efficient removal, accelerated adsorption rate, high photothermal conversion efficiency Effect

Active Publication Date: 2021-09-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high selectivity of TEMPO produces harmful compounds such as C6-aldehydes and C2 / C3-ketones during oxidation

Method used

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  • Biomass-based thermosensitive bionic hydrogel adsorption material as well as preparation method and application thereof
  • Biomass-based thermosensitive bionic hydrogel adsorption material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of Biomass-Based Thermosensitive Biomimetic Hydrogel Adsorbent Material

[0030] (1) Slowly add polyethyleneimine to the N-isopropylacrylamide solution with a mass ratio of 50wt% polyethyleneimine aqueous solution with a mass average molecular weight of 70000 and N-isopropylacrylamide at a mass ratio of 1:3 , stirred evenly and reacted for 1 day, then frozen to terminate the reaction, and after 2 days of dialysis, freeze-dried. A dried 6.5 g sample of polyethyleneimine / N-isopropylacrylamide polymer was dissolved in 1.0 g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 1.0 g N -Reaction with carboxylated nanocellulose under the action of hydroxysuccinimide catalyst, the carboxylated nanocellulose used is prepared from bagasse as raw material, carboxylated nanocellulose and polyethyleneimine / N-isopropyl The mass ratio of acrylamide polymer is 1:6.

[0031] (2) 12.0g of Tris and 3mL of dilute hydrochloric acid were uniformly mixed a...

Embodiment 2

[0033] Example 2: Preparation of Biomass-Based Thermosensitive Biomimetic Hydrogel Adsorbent Material

[0034](1) Slowly add polyethyleneimine to the N-isopropylacrylamide solution with a mass ratio of 50wt% polyethyleneimine aqueous solution with a mass average molecular weight of 70000 and N-isopropylacrylamide at a mass ratio of 1:2 , stirred evenly and reacted for 1 day, then frozen to terminate the reaction, and after 2 days of dialysis, freeze-dried. A dried 6.5 g sample of polyethyleneimine / N-isopropylacrylamide polymer was dissolved in 1.0 g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 1.0 g N -Reaction with carboxylated nanocellulose under the action of hydroxysuccinimide catalyst, the carboxylated nanocellulose used is prepared from bagasse as raw material, carboxylated nanocellulose and polyethyleneimine / N-isopropyl The mass ratio of acrylamide polymer is 1:3.

[0035] (2) 12.0g of Tris and 3mL of dilute hydrochloric acid were uniformly mixed an...

Embodiment 3

[0037] Example 3: Preparation of Biomass-Based Thermosensitive Biomimetic Hydrogel Adsorbent Material

[0038] (1) Slowly add polyethyleneimine to the N-isopropylacrylamide solution with a mass ratio of 50wt% polyethyleneimine aqueous solution with a mass average molecular weight of 70000 and N-isopropylacrylamide at a mass ratio of 1:1 , stirred evenly and reacted for 1 day, then frozen to terminate the reaction, and after 2 days of dialysis, freeze-dried. A dried 6.5 g sample of polyethyleneimine / N-isopropylacrylamide polymer was dissolved in 1.0 g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 1.0 g N -Reaction with carboxylated nanocellulose under the action of hydroxysuccinimide catalyst, the carboxylated nanocellulose used is prepared from bagasse as raw material, carboxylated nanocellulose and polyethyleneimine / N-isopropyl The mass ratio of acrylamide polymer is 1:5.

[0039] (2) 12.0g of Tris and 3mL of dilute hydrochloric acid were uniformly mixed a...

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Abstract

The invention discloses a biomass-based thermosensitive bionic hydrogel adsorption material and a preparation method and application thereof. The biomass-based thermosensitive bionic hydrogel adsorption material is prepared through the steps that taking a biomass material as a matrix, taking polyethyleneimine and N-isopropylacrylamide as functional reagents to modify the matrix, depositing polydopamine, and cross linking sodium alginate; and synthesizing the biomass-based thermosensitive bionic hydrogel adsorption material. The material has good performance when being applied to the field of adsorption of low-concentration anion heavy metal ions and organic dyes, the removal rate of the anion heavy metal Cr (VI with the initial concentration of 2000 ppb is larger than 99.99%, and the concentration of the removed heavy metal ions reaches the national drinking water standard. And the removal rate on low-concentration organic dye methylene blue (2000ppb) can also reach 95% or above.

Description

technical field [0001] The invention relates to the field of heavy metal ion adsorption, in particular to a biomass-based heat-sensitive biomimetic hydrogel adsorption material and a preparation method and application thereof. Background technique [0002] With the development of industrialization, chemicals, metal ions and organic dyes in papermaking, leather, printing and dyeing, mining and steel production have been discharged into rivers and lakes. Organic dyes and metal ions are stable in the natural environment and difficult to degrade. These dye molecules and metal ions may be highly toxic and carcinogenic to water bodies. Enrichment of organisms through the food chain and association with cell membranes would pose a serious challenge to human health. Therefore, there is an urgent need to develop effective methods to remove organic dyes and metal ions from wastewater. Compared with biodegradation, membrane separation, and electrochemistry, the adsorption method is ...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/24B01J20/30C02F1/28C02F101/20C02F101/30C02F101/36C02F101/38
CPCB01J20/28047B01J20/24C02F1/286B01J2220/4825C02F2101/20C02F2101/308C02F2101/36C02F2101/38
Inventor 朱红祥周航何辉熊建华薛飞孙琢张立斌
Owner GUANGXI UNIV
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