Synthesis and characterization of salt resistance hydrogel microspheres by inverse suspension polymerization

Author:

Zhou Ming12,Zhao Jinzhou3,Pu Wanfen1,Wang Xu2,Yang Yan2

Affiliation:

1. 1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum University, Chengdu, Sichuan, China

2. 2School of Material Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan, China

3. 3State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum University, Chengdu, Sichuan, China 610500; fax: +86-28-8303-2901

Abstract

AbstractA series of novel salt-resistance hydrogel microspheres P(AM-co-AMPS) are synthesized by inverse suspension copolymerization using ammonium persulfate (APS) as the initiator and N,N-methylene bisacrylamide (MBA) as the crosslinker and polyvinyl alcohol (PVA) as disperse agent. Optimization syntheses condition of hydrogel microspheres copolymer P(AM-co-AMPS) SAPs is crosslinker content 0.01%, ratio of water to oil 4%, ratio of monomer to surfactant 30%, ratio of acrylamide to 2-acrylamido-2-methylpropane sulphonic acid 80:20 and initiator APS content 1.0%. Their effects on the salt absorbency of the synthesized hydrogel microspheres are investigated. FTIR indicates the two monomeric units of the acrylamide and 2-acrylamido-2-methylpropane sulphonic acid exists in copolymer backbone. SEM indicates that the number of the micropores largely decrease with the water/oil ratio increasing from 4% to 10%. Elemental analysis indicate that the measured values of carbon, sulfur, nitrogen, hydrogen four elements is very close to theoretical value. The experimental results of salt-resistance hydrogel microspheres show the salt absorbency decrease with the increase of salt concentration. The maximum salt absorbency is 132g/g within 75min in 0.9% sodium chloride solution and the effect of calcium ion on salt absorbency is much greater than that of sodium ion.

Publisher

Walter de Gruyter GmbH

Subject

Polymers and Plastics,Physical and Theoretical Chemistry,General Chemical Engineering

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