纤维素-丙烯酰胺-壳聚糖接枝共聚的研究

On the graft-copolymerization of cellulose-acrylamide-chitosan

以K2S2O8-NaHSO3氧化还原体系为引发剂,合成了羧甲基纤维素(CMC)-丙烯酰胺(AM)-壳聚糖(CTS)接枝共聚物.研究了单体浓度、引发剂用量、反应温度、反应时间以及壳聚糖用量对接枝共聚反应的影响.采用红外光谱(FI-IR)对接枝聚合物进行了结构表征.结果表明:当AM=1.00 mol.L-1,引发剂(K2S2O8/NaHSO3=1∶1)浓度为5 mmol.L-1,mCTS/mCMC=1/5,反应温度55℃,反应时间3 h时,AM的转化率和接枝效率可分别达到76%和91%.

Using K2S2O8-NaHSO3 redox system as trigger,a new graft-copolymer was synthesized called carboxy methyl cellulose（CMC）-acrylamide（AM）-crylamide chitosan（CTS）.The effect of various factors such as reaction time,reaction temperature and intiator amount were investigated.The graft copolymer was characterized and analyzed by FT-IR.The result showed that polymerization rate and graft efficiency of acrylamide could reach 76% and 91% respectively when the conditions were as followed： the mass ratio of chitosan to carboxyl methyl cellulose was 1/5,the concentration of acrylamide was 1.0 mol·L-1,the concentration of initiator was 5 mmol·L-1,temperature was 55 ℃ and time was 3 h.