Saline solution absorbency and structure study of poly (AA-AM) water superabsorbent by inverse microemulsion
polymerization |
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Authors: | Tao Wan Lan Wang Jie Yao XiaoLing Ma QingSheng Yin TianShun Zang |
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Affiliation: | (1) College of Materials and Chemistry &Chemical Engineering, Chengdu University of Technology, 610059 Chengdu, China |
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Abstract: | A series of novel copolymer superabsorbents based on acrylamide (AM), acrylic acid(AA) were prepared
by inverse microemulsion copolymerization using ammonium persulfate (APS) as the initiator and N,N-methylenebisacrylamide
(MBA) as the crosslinking agent and OP-10 and SDS as complex surfactants. The synthetic variables (amount
of crosslinking agent and initiator, water/oil ratio, monomer/surfactant ratio and AA/ Am ratio) and their
effects on the absorbencies of the synthesized superabsorbents were investigated. The experimental results
of superabsorbent polymers (SAPs) showed the maximum saline solution absorbency of 130 g/g within
75 min, and the saline solution absorbency of 111 g/g within 30 min. FTIR indicated the
structure of the acrylic acid and acrylamide copolymer. SEM indicated that the particles prepared with
higher crosslinker content (0.03%) showed smaller pore sizes and less porous structures compared with those
with less crosslinker content (0.01%) and the number of the micropores largely decreased with the water/oil
ratio increasing from 8% to 14%. |
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Keywords: | |
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