苗永刚,刘作新,尹光华,王振营.改性玉米秸秆制备农用保水剂及其性能研究[J].干旱地区农业研究,2009,27(2):213~217
改性玉米秸秆制备农用保水剂及其性能研究
Synthesis and characterization of a novel super-absorbent hydro-gel based on chemically modified pulverized corn stalks and acrylic acid
  
DOI：10.7606/j.issn.1000-7601.2009.02.40
中文关键词:  保水剂  水凝胶  吸液量  接枝聚合
英文关键词:super-absorbent copolymer  hydro-gel  swelling ratio  polymerization
基金项目:中国科学院知识创新工程项目(KSCX2-YW-N-004)； 辽宁省节水农业重点实验室基金项目(05KJT21002)； 辽宁省农业科技计划重大项目(2007212001)
作者单位
苗永刚 Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China；Graduate University of Chinese Academy of Sciences,Beijing 100049,China 
刘作新 Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China 
尹光华 Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China 
王振营 Institute of A pplied Ecology Chinese Academy of Sciences,Shenyang,Liaoning 110016,China 
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中文摘要:
      以改性玉米秸秆(MPCS)、丙烯酸单体(AA)为接枝共聚原料,以N,N′-亚甲基双丙烯酰胺(MBA)为交联剂,过硫酸铵(APS)为引发剂,合成新型农用保水剂,并对保水剂吸水性能影响因素进行分析:当固定单体丙烯酸用量为100 g时,改性玉米秸秆最佳用量为10 g,引发剂用量为1.2 g,交联剂为0.15 g,反应温度为70℃,丙烯酸中和度为90%。所得保水剂胶体最大吸水倍率在蒸馏水和0.9%生理盐水中吸液量分别为823 g/g和83 g/g。红外光谱分析和电镜扫描表明,保水剂胶体接枝聚合成功,胶体具有良好的表面形态。
英文摘要:
      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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