To develope the green agricultural using superabsorbent resin(SAR),a simultaneous irradiation technique of 60Co-γ gamma rays was utilized to graft acrylic acid and acrylic amide on to straws.The character and properties of straws,preprocessed straws and SAR were expressed by FT-IR.The parameters of dose of irradiation,monomer-to-straw ratio,the acrylamide-to-acrylic acid ratio,the ability of copolymer to retain absorbed water including the ratio of water absorption and salt resistance of SAR were studied.The study indicated that when the synthesis condition were the straw fiber processed by NaOH and urea solution at the low temperature,the irradiation dose of 6kGy,the monomer to straw ratio of 1∶9 and the acrylamide-to-acrylic acid ratio of 1.5,the water absorbency ratio of 760 could be obtained,and the salt water absorbency ratio of 130 could be achieved.Which got over the problems of traditional method of higher energy consumption,more serious pollution,low graft rate and poorer water retention.
[1]方放,李想,石祖梁,等.黄淮海地区农作物秸秆资源分布及利用结构分析[J].农业工程学报,2015,31(2):228-234.
[2]Talebnia F,Karakashev D,Angelidaki I.Production of bioethanol from wheat straw:an overview on pretreatment,hydrolysis and fermentation[J].Bioresource Technology,2010,101:4744-4753.
[3]Liu Z,Miao Y,Wang Z,et al.Synthesis and characterization of a novel super-absorbent based on chemically modified pulverized wheat straw and acrylic acid[J].Carbohydrate Polymers,2009,77:131-135.
[4]Wan T,Huang R,Zhao Q,et al.Synthesis of wheat straw composite superabsorbent[J].Journal of Applied Polymer Science,2014,130:3404-3410.
[5]Karimi K,Kheradmandinia S,Taherzadeh M J.Conversion of rice straw to sugars by dilute-acid hydrolysis[J].Biomass & Bioenergy,2006,30:247-253.
[6]Binod P,Sindhu R,Singhania R R,et al.Bioethanol production from rice straw:an overview[J].Bioresource Technology,2010,101:4767-4774.
[7]Cai J,Zhang L,Zhou J,et al.Novel fibers prepared from cellulose in NaOH/urea aqueous solution[J].Macromolecular Rapid Communications,2004,25:1558-1562.
[8]Alouloua F,Boufi S,Labidi M.Modified cellulose fibres for adsorption of organic compound in aqueous solution[J].Separation & Purification Technology,2006,52:332-342.
[9]Yan L,Zhao Y,Qing G U,et al.Isolation of highly purity cellulose from wheat straw using a modified aqueous biphasic system[J].Frontiers of Chemical Science and Engineering,2012,6:282-291.
[10]冯志鑫,商平,刘美荣,等.几种因素对葵花秸秆髓制备高吸水树脂的研究[J].化工科技,2009,17(3):5-8.
[11]Qi H,Yang Q,Zhang L,et al.The dissolution of cellulose in NaOH-based aqueous system by two-step process[J].Cellulose,2011,18:237-245.
[12]Pourjavadi A,Harzandi A M,Hosseinzadeh H.Modified carrageenan 3.synthesis of a novel polysaccharide-based superabsorbent hydrogel via graft copolymerization of acrylic acid onto kappa-carrageenan in air[J].European Polymer Journal,2004,40:1363-1370.
[13]Guo M,Liu M,Zhan F,et al.Preparation and properties of a slow-release membrane-encapsulated urea fertilizer with superabsorbent and moisture preservation[J].Industrial & Engineering Chemistry Research,2005,44(12):4206-4211.
[14]龙明策,王鹏,郑彤,等.高吸水性树脂溶胀热力学及吸水机理[J].化学通报,2002,65(10):705-709.
[15]罗雷,万涛,熊磊,等.小麦秸秆接枝AA/AM高吸水树脂的结构及性能[J].广州化工,2013,41(4):60-63.
[16]贺龙强,刘中阳.麦秸秆纤维素接枝丙烯酸制备高吸水性树脂的研究[J].安徽农业科学,2011,39(22):13549-13550,13552.
[17]Liu J,Wang Q,Wang A.Synthesis and characterization of chitosan-g-poly(acrylic acid)/sodium humate superabsorbent[J].Carbohydrate Polymers,2007,70:166-173.
[18]覃莉莉,万涛,熊磊,等.改性玉米秸秆复合高吸水树脂的尿素吸收及缓释性能[J].农业工程学报,2013,29(21):188-193.
[19]Liu T,Qian L,Li B,et al.Homogeneous synthesis of chitin-based acrylate superabsorbents in NaOH/urea solution[J].Carbohydr Polym,2013,94(1):261-271.
基金资助
安徽高校自然科学研究项目(KJ2015A282);国家青年基金(51403024)
PDF
(1272KB)
