Polymeric amine based carbon dioxide adsorbents

A method for preparing a carbon dioxide adsorbent, the method comprising (a) adding an oxide derivative to a solution of a raw polyalkyleneimine in a solvent, (b) stirring the solution such that at least one of the nitrogen atoms of the raw polyalkyleneimine is alkylated with a hydroxyethyl group, (c) removing the solvent from the reaction solution to obtain a polyalkyleneimine modified by partial substitution with the hydroxyethyl group, and (d) supporting the modified polyalkyleneimine on a porous support.

A core-shell structured carbon dioxide adsorbent in which the core comprises a polymeric amine consisting of a polymer skeleton containing nitrogen atoms and branched chains bonded to the nitrogen atoms of the polymer skeleton, each branched chain containing at least one nitrogen atom, and a porous support on which the polymeric amine is supported, and the shell comprises a conductive carbon material layer surrounding and coated on the core wherein the polymeric amine is modified by substitution of at least one of the nitrogen atoms of the polymer skeleton or the branched chains with a hydroxyl group-containing carbon chain.

A method for preparing a carbon dioxide adsorbent, the method comprising (a) adding an oxide derivative to a solution of a raw polyalkyleneimine in a solvent, (b) stirring the solution such that at least one of the nitrogen atoms of the raw polyalkyleneimine is alkylated with a hydroxyethyl group, (c) removing the solvent from the reaction solution to obtain the polyalkyleneimine modified by partial substitution with the hydroxyethyl group, (d) supporting the modified polyalkyleneimine on a porous support, (e) adding a conductive carbon material to the modified polyalkyleneimine-supported porous support, (f) stirring the mixture such that the conductive carbon material is uniformly coated on the surface of the modified polyalkyleneimine-supported porous support, to obtain a core-shell structured adsorbent, and (g) removing the conductive carbon material remaining uncoated on the surface of the modified polyalkyleneimine-supported porous support.

A polymeric amine consisting of a polymer skeleton containing nitrogen atoms and branched chains bonded to the nitrogen atoms of the polymer skeleton, each branched chain containing at least one nitrogen atom, wherein the polymeric amine is modified by substitution of at least one of the nitrogen atoms of the polymer skeleton or the branched chains with a hydroxyl group-containing carbon chain and wherein the hydroxyl group-containing carbon chain is a functional group derived from the ring-opening reaction of an oxide derivative and has a structure represented by —(CH2)m(OH)nL (where m is an integer from 1 to 20, n is an integer from 1 to 10, and L is hydrogen, C1-C18 alkyl, C3-C10 cycloalkyl, C1-C18 alkoxy, —CH═CH2, —CH═CHCH2CH3, —CH2CH═CHCH3, —CH2CH2CH═CH2, —CH═CHCH2CH2CH2CH3, —CH2CH═CHCH2CH2CH3, —CH2CH2CH═CHCH2CH3, —CH2CH2CH2CH═CHCH3, —CH2CH2CH2CH2CH═CH2, —CH═CHCH2CH2CH2CH2CH2CH3, —CH2CH═CHCH2CH2CH2CH2CH3, —CH2CH2CH═CHCH2CH2CH2CH3, —CH2CH2CH2CH═CHCH2CH2CH3, —CH2CH2CH2CH2CH═CHCH2CH3, —CH2CH2CH2CH2CH2CH═CHCH3, —CH2CH2CH2CH2CH2CH2CH═CH2, —CH2O(CH2)3Si(OCH3)3, —CH2O(CH2)3Si(OCH2CH3)3, —CH2O(CH2)2CH3, —CH2O(CH2)3CH3, —CH2OCH═CHCH3 or —CH2OCH2CH═CH2).