A block copolymer and absorbent comprising the block copolymer

A technology of block copolymers and absorbents, applied in the direction of reagents, educts, separation methods, etc., can solve the problems of absorbents that are affected by repeated use, cannot be completely removed, and inorganic carbonates cannot be decomposed and regenerated. Achieve excellent absorption capacity, high phase separation efficiency, and reduce regeneration energy consumption

Active Publication Date: 2022-07-29
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CO in the precipitated phase of amino acid salt 2 During the desorption process, the generated inorganic carbonate cannot be decomposed and regenerated at the desorption temperature, and the CO 2 Residues in the system cannot be completely removed, and have a certain impact on the repeated use of absorbents

Method used

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  • A block copolymer and absorbent comprising the block copolymer
  • A block copolymer and absorbent comprising the block copolymer
  • A block copolymer and absorbent comprising the block copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Synthesis of polyquaternary ammonium salt type macroinitiator

[0041] Accurately weigh 1.5880g of dry benzylethyltrimethylammonium chloride and 0.067g of CuBr 2 , 125uL ligand PMDETA, 2.5ml DMF in a 50mL eggplant-shaped bottle, stir evenly, and seal. pass N 2 30min, three times of freezing-pumping-dissolving to remove the air in the eggplant-shaped bottle. After degassing, 0.0274g of ascorbic acid was dissolved in 2.5ml of ultrapure water, and then injected into the eggplant-shaped bottle at one time. Finally, 44uL of ethyl 2-bromoisobutyrate was added with a micro-injector, reacted at 30°C for 30h, and lyophilized after dialysis to obtain a polymer Quaternary ammonium salt type macroinitiator.

[0042] (2) Synthesis of thermosensitive block copolymer

[0043] In a 50ml eggplant-shaped bottle, 1.5g of polyquaternium-type macroinitiator, 0.6g of NIPAM, and 0.067g of CuBr were added in sequence. 2 , ME6TREN160.4uL, 3.3ml DMF, ultrasonic for 5min to completely d...

Embodiment 2

[0047] (1) Synthesis of polyquaternary ammonium salt type macroinitiator

[0048] Accurately weigh 1.4990g of dry benzylethyltrimethylammonium chloride, 0.1340g of CuBr2, 250uL of ligand PMDETA, and 2.5ml of DMF in a 50mL eggplant-shaped bottle, stir evenly and seal. pass N 2 30min, three times of freezing-pumping-dissolving to remove the air in the eggplant-shaped bottle. After degassing, 0.0528g of ascorbic acid was dissolved in 2.5ml of ultrapure water, and then injected into the eggplant-shaped bottle at one time. Finally, 88uL of ethyl 2-bromoisobutyrate was added with a micro-injector, reacted at 30°C for 30h, and lyophilized after dialysis to obtain a polymer Quaternary ammonium salt type macroinitiator.

[0049] (2) Synthesis of thermosensitive block copolymer

[0050] In a 50ml eggplant-shaped bottle, add 1.5g of polyquaternium-type macroinitiator, 0.6g of NIPAM, and 0.1340g of CuBr in turn. 2 , ME6TREN320.8uL, 3.3ml DMF, ultrasonic for 5min to completely dissolv...

Embodiment 3

[0054] (1) Synthesis of polyquaternary ammonium salt type macroinitiator

[0055] Accurately weigh and dry 1.4990g of benzylethyltrimethylammonium chloride, 0.2233g of CuBr2, 417uL of ligand PMDETA, and 2.5ml of DMF in a 50mL eggplant-shaped bottle, stir evenly, and seal. pass N 2 30min, three times of freezing-pumping-dissolving to remove the air in the eggplant-shaped bottle. After degassing, 0.0880g of ascorbic acid was dissolved in 2.5ml of ultrapure water and injected into the eggplant-shaped bottle at one time. Finally, 147uL of ethyl 2-bromoisobutyrate was added with a micro-injector, reacted at 30°C for 30h, and lyophilized after dialysis to obtain a polymer Quaternary ammonium salt type macroinitiator.

[0056] (2) Synthesis of thermosensitive block copolymer

[0057] In a 50ml eggplant-shaped bottle, 1.8g of polyquaternium-type macroinitiator, 0.6g of NIPAM, and 0.2680g of CuBr were added in sequence. 2 , ME6TREN641.6uL, 3.3ml DMF, ultrasonic for 5min to complet...

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Abstract

The invention discloses a method for preparing a block copolymer, which comprises the steps of synthesizing a polyquaternary ammonium salt, synthesizing a temperature-sensitive block copolymer and grafting an amino acid with the temperature-sensitive block copolymer. The invention also discloses the block copolymer prepared by the preparation method, and the CO containing the block copolymer 2 Absorbent. The absorbent has temperature responsiveness and is a CO with excellent absorption capacity and phase separation performance. 2 Absorbent.

Description

technical field [0001] The present invention relates to the field of absorbents, in particular to CO 2 Absorbent field. Background technique [0002] large amounts of greenhouse gases (CO 2 , CH 4 , N 2 O, hydrofluorocarbons, etc.) emissions have further aggravated the global environmental problem - the greenhouse effect, and the occurrence of global extreme climate events has also increased. Among the many greenhouse gases that contribute to global warming, CO 2 about 60%, therefore, CO 2 Considered the most important greenhouse gas. After the Industrial Revolution, human dependence on fossil fuels (coal, oil, natural gas) intensified, and from 1970 to 2004, the annual CO 2 emissions increased by nearly 80%. In 2013, CO in the global atmosphere 2 The average concentration is 396.0ppm; CO for the year 2 The content increased by 2.9ppm, a record of the past 30 years. IPCC (Intergovernmental Panel on Climate Change, Intergovernmental Panel on Climate Change) predict...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F293/00C08F212/14C08F220/54B01D53/14
CPCB01D53/1493C08F8/32C08F212/14C08F220/54B01D2257/504C08F293/00Y02P20/151
Inventor 江兵兵欧阳煌陈振威叶海峰
Owner HUBEI UNIV
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