凤眼莲高效含硼高吸水性树脂的制备  

Synthesis of Boron Containing Super Water Absorbent from Eichhornia Crassipes

作　　者：李仲谨[1] 穆瑞花[1] 李源明[1] 全晓[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《精细化工》2007年第10期1018-1021,1025,共5页Fine Chemicals

基　　金：陕西省科学技术研究发展计划项目之工业攻关项目(2006K08-G11)~~

摘　　要：研究了凤眼莲与单体丙烯酸(AA)和丙烯酰胺(AM)接枝共聚反应中,凤眼莲与AA和AM质量比、AA与AM质量比、(NH4)2S2O8-NaHSO3用量、K2S2O8用量、AA单体浓度、AA中和度、N,N-亚甲基双丙烯酰胺(MBA)用量、反应温度等因素对树脂吸水性能的影响,探讨了硼酸浓度对树脂吸水效果的影响。结果表明,当凤眼莲与双单体AA、AM质量比为1∶6,AA和AM质量比为3∶1,AA单体浓度为1.6 mol/L,AA中和度为40%,m〔(NH4)2S2O8-NaHSO3〕/m(AA)=0.006 6,m(K2S2O8)/m(AA)=0.011 6,m(MBA)/m(AA)=0.016 6,反应温度为75℃时,制备的高吸水性树脂(SAR)具有良好的吸水性能;硼酸浓度为100μmol/L时SAR具有良好的吸水效果。接枝效率为50.5%,单体转化率为86%,吸水率为450 g/g,吸盐水率为120 g/g;SAR吸水速率快,大约30 min左右即可达到饱和;SAR保水性能好,抑蒸效果显著。A superabsorbent resin（SAR） was synthesized from Eichhornia Crassipes with dual monomers acrylic acid（AA） and acrylamide（AM） by graft copolymerization. The preferred process conditions were m（AA and AM）/m（material） = 6 ,m（ AA）/m（AM） = 3 ,m（ （ NH4 ）2S2O8 and NaHSO3]/m（AA） = 0.0066,m（K2S2O8）/m（AA） =0.0116,c（AA） = 1.6 mol/L,m（MBA）/m（AA） =0.0166, neutralization degree of AA = 40%, reaction temperature 75℃ and c （ H3BO3 ） = 100 μmol/L. The grafting rate was 50. 5% and monomer conversion was 86%. The absorption capacity of resin with high absorption speed and excellent water holding property can reach 450 g/g of water and 120 g/g in case of w（NaCl） =0. 9% water solution. The absorption speed of resin was high and it was saturated after 30 min. The SAR had good water holding performance, and its evaporation restraining effect was obvious. The water of saturated SAR dissipated completely two days later than natural water. The water of the soil with SAR dissipated completely seven days later than that without SAR.

关 键 词：凤眼莲 接枝共聚 高吸水性树脂 丙烯酸系列化学品 

分 类 号：TQ351.469[化学工程] O631.5[理学—高分子化学]