期刊
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY
卷 50, 期 2, 页码 175-184出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/10601325.2013.741891
关键词
Hydrogel composite; acrylamide; 2-acrylamido-2-methylpropane sulfonic acid; kaolin; gel strength; salt resistance
资金
- National High Technology Research and Development Program of China (863 Program) [2006AA06Z225]
A novel poly(acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid)/kaolin (P(AM-co-AMPS)/kaolin) superabsorbent composite was synthesized by copolymerization reaction of acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and kaolin using ammonium persulfate (APS) as an initiator and N,N'-methylenebisacrylamide (NMBA) as a crosslinker in an aqueous solution. Evidence of the reaction between kaolin and P(AM-co-AMPS) copolymer was confirmed by comparing the Fourier transform infrared (FTIR) spectra of kaolin, P(AM-co-AMPS) copolymer and P(AM-co-AMPS)/kaolin superabsorbent composite. The reaction was also confirmed by scanning electron microscopy (SEM). Effects of APS, NMBA and kaolin concentrations, weight ratio of AM/AMPS and reaction temperature on water absorbency were investigated. The superabsorbent composite synthesized under the optimum synthesis conditions exhibits the maximum water absorption of 1678g/g in distilled water and 141g/g in 0.9wt% NaCl solution. Results obtained from this study show that P(AM-co-AMPS)/kaolin superabsorbent composite has good water and salt solution absorbency at a relatively high temperature. The gel strength of the superabsorbent composite is significantly increased by increasing the concentration of kaolin.
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