摘要
以N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂、过硫酸氨(APS)为引发剂,采用微波辐射法在羧甲基纤维素钠(CMC)上接枝2-丙烯酰胺基-2-甲基丙磺酸(AMPS)合成了耐盐高吸水性树脂P(AMPS/CMC);考察了微波功率(P)、辐射时间(t)、CMC用量、NMBA用量、APS用量、AMPS的中和度(N)对树脂吸水倍率的影响;采用FTIR,SEM,TG等手段对树脂进行了表征。实验结果表明,在最佳合成条件(m(NMBA)∶m(APS)∶m(CMC)∶m(AMPS)=0.5∶2∶5∶100,P=195W,t=3.15 min,N(AMPS)=45%,w(CMC+AMPS)=30%)下合成的P(AMPS/CMC),在离子强度为0.154 mol/L的NaCl,CaCl2,AlCl3溶液和去离子水中的吸水倍率分别为126,63,20,1 345 g/g。该树脂具有较好的层状结构和热稳定性(主分解温度在250℃以上),CMC的加入有利于提高树脂的热稳定性和耐盐性能。
Superabsorbent resin（P（AMPS/CMC）） with good salt-resistance was synthesized by graft copolymerization of carboxymethylcellulose（CMC） with 2-acrylamido-2-methyl propane sulfonic acid（AMPS） under microwave irradiation with ammonium persulfate（APS） as initiator and N,N′-methylene-bis-acrylamide（NMBA） as crosslinking agent.The effects of microwave power,irradiation time,the dosages of CMC,NMBA and APS,and neutralization degree（N） of AMPS on the water absorbency of P（AMPS/CMC） were studied.The resin was characterized by means of FTIR,SEM and TG.Under the optimum conditions：m（NMBA）∶m（APS）∶m（CMC）∶m（AMPS） of 0.5∶2∶5∶100,195 W,3.15 min,N（AMPS） 45%,30%（w） CMC＋AMPS,the absorption rates of the resins were 1 345,126,63,20 g/g in distilled water,NaCl,CaCl2 and AlCl3 solution with the same ionic strength of 0.154 mol/L,respectively.The P（AMPS/CMC） has good cross-link structure,high thermal stability with main decomposition temperature over 250 ℃.The addition of CMC was helpful to increase the thermal stability and salt-resistance of P（AMPS/CMC）.
出处
《石油化工》
CAS
CSCD
北大核心
2012年第4期443-448,共6页
Petrochemical Technology
基金
安徽省高校自然科学基金资助项目(KJ2009B054Z
KJ2009B120Z)
关键词
微波辐射
接枝共聚
羧甲基纤维素钠
2-丙烯酰胺基-2-甲基丙磺酸
吸水性树脂
microwave irradiation
graft copolymerization
carboxymethylcellulose
2-acrylamido-2-methyl propane sulfonic acid
super absorbent resin
