反相乳液合成阳离子聚丙烯酰胺絮凝剂及其表征

第45卷第4期2019年8月兰州理工大学学报JournalofLanzhouUniversityofTechnologyVol.45No.4Aug.2019文章编号：1673-5196(2019)04-0016-06反相乳液合成阳离子聚丙烯酰胺絮凝剂及其表征陈振斌周永山，陈长军彳，汪润田彳(1.兰州理工大学材料科学与工程学院，甘肃兰州730050；2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室，甘肃兰州730050)摘要：以丙烯酰胺(AM)和二甲基二烯丙基氯化铁(DMDAAC)为原料，采用反相乳液聚合法制备了阳离子聚丙烯酰胺(CPAM),并对其结构进行了表征.以高岭土悬浊液模拟废水进行沉降实验，考察了单体用量及其配比等工艺条件对产物粘均分子量(M“)和絮凝率(Sp)的影响.结果表明：合成CPAM的最佳搅拌速率为540〜960r/min,单体质量分数为65%,讥AM):讥DMDAAC)=10:1,V(CYH):V(H2O)=1.2,观(司盘80+吐温80):m(AM+DMDAAC)=0.l,m(span80):m(tween80)=3,n(H2O2):n(AM)=0.033,反应时间为5h,温度为40°C,在此条件下,可达5.92X10%其Sp最高达到99.24%.关键词：反相乳液聚合法；阳离子型聚丙烯酰胺；絮凝性能中图分类号：TB34文献标识码：APolymerizationofcationicpolyacrylamideasflocculantwithinverseemulsionanditscharacterizationCHENZhen-bin1^，ZHOUYong-shan1^，CHENZhang-jun2，WANGRun-tian2(1.CollegeofMaterialsScienceandEngineering,LanzhouUniv,ofTech.,Lanzhou730050,China；2.StateKeyLaboratoryofAdvancedProcessingandRecyclingofNonferrousMetals,LanzhouUniv,ofTech.,Lanzhou730050,China)Abstract:Thecationicpolyacrylamide(CPAM)waspreparedbymeansofinverseemulsionpolymeriza­tionwithacrylamide(AM)anddimethyldiallylammoniumchloride(DMDAAC)asitsrawmaterials.ThestructureofCPAMwascharacterized.Takingkaolinsuspensionassimulatedwastewater,thesettlingtestwasconductedandtheinfluenceofmonomerdosageanditsmatchingratioonviscosity-averagemolec­ularweightoftheobtainedproductanditsflocculatingratewasinvestigated.Theresultshowedthatun­derconditionofoptimalsynthesisprocess,thestirringspeedwouldbe540〜960r/min,monomercontentwouldbe65%,/i(AM):/i(DMDAAC)=10:1,V(CYH):V(H2O)=1.2,m(span80+tween80):m(AM+DMDAAC)=0.1,m(span80):m(tween80)=397i(H2O2):AM)=0.033，reactiondurationwouldbe5h,reactiontemperaturewouldbe40°C，andtheviscosity-averagemolecularweightandfloccu­latingratewouldreachthemaximum,being5.92X10°and99.24%，respectively.Keywords:inverseemulsionpolymerization；cationicpolyacrylamide；flocculationperformance阳离子型聚丙烯酰胺(CPAM)是由丙烯酰胺单体(AM)和阳离子单体共聚而成，其主要特征是分子长链上有酰胺基团和带正电荷的阳离子基团⑴，CPAM因为具有溶解性好、高效无毒、造价低廉等优点⑵，在水处理领域,CPAM是一种被广泛应用的高分子絮凝剂，对悬浮颗粒及带负电荷的污水有收稿日期：2018-07-16基金项