| Synthesis and characterization of a novel super-absorbent hydro-gel based on chemically modified pulverized corn stalks and acrylic acid |
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| DOI：10.7606/j.issn.1000-7601.2009.02.40 |
| Key Words: super-absorbent copolymer hydro-gel swelling ratio polymerization |
| Author Name | Affiliation | | MIAO Yonggang | Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China；Graduate University of Chinese Academy of Sciences,Beijing 100049,China | | LIU Zuoxin | Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China | | YIN Guanghua | Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China | | WANG Zhenying | Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China |
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| Abstract: |
| Anovel super-absorbent hydro-gels was synthesised based on chemically modified pulverized corn stalks（CMPCS） and acrylic acid （AA） in aqueous solution using N,N′-methylenebisacrylamide（MBA） as a cross-linker and ammonium persulfate（APS） as an initiator．Factors influencing water absorbency of the superabsorbent composite were investigated such as reaction temperature weight ratio of AA to CMPCS neutralization degree of AA and amount of initiator and cross-linker．The maximum absorbency of the optimized final product was 823 g／g in distilled water and 83g／g in 0．9％ NaCl solution respectively．The super-absorbent composite exhibited improved water and saline absorbencies compared with that of cross-linked poly （acrylic acid-co-sodium carboxymethylcellulose） super-absorbent polymer．The structure of the graft copolymer was confirmed by IR spectrum and TGA．The surface morphology of gel was examined by scanning electron microscopy （SEM）. |
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