N,N'-对苯二亚甲基-双(十二烷基二甲基氯化铵)/AEO_9复配体系表面活性研究  

Study on surface activity of N,N'-p-xylylene- bis-( dodecyldimethylammonium chloride)/AEO_9 blend systems

作　　者：李刚森[1] 赵林秀[2] 王培义[1] 苏豪[1] 翟家彬[2] 江东方[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450001 [2]中北大学化工与环境学院,山西太原030051

出　　处：《日用化学工业》2016年第7期392-396,共5页China Surfactant Detergent & Cosmetics

摘　　要：以对二氯苄(XDC)和十二烷基二甲基叔胺为原料,合成了阳离子双子表面活性剂N,N'-对苯二亚甲基-双(十二烷基二甲基氯化铵)(XBDDMA)。产物结构经红外光谱(FT-IR)、核磁共振氢谱(~1H NMR)和碳谱(^(13)C NMR)进行了确认。研究了XBDDMA与脂肪醇聚氧乙烯(9)醚(AEO_9)按不同摩尔比复配所得体系的临界胶束浓度(cmc)、平衡表面张力(γ_(cmc))及动态表面张力。结果表明,当n(XBDDMA)∶n(AEO_9)=1∶9~9∶1时,随XBDDMA含量增加,复配体系的cmc先降低后升高,表面活性剂分子在表面上的极限占有面积(A_(min))持续降低,当n(XBDDMA)∶n(AEO_9)=1∶1时复配体系的cmc最小,为2.27×10^(-6)mol/L,γ_(cmc)也最小,为33.06 m N/m;XBDDMA的添加降低了吸附初期的扩散能,从而降低了AEO_9的动态表面活性,二者复配不具有动态表面活性的协同增效作用。Cationic Gemini surfactants N,N＇- p- xylylene- bis-（ dodecyldimethylammonium chloride）（ XBDDMA） were synthesized by 1,4- bis-（ chloromethyl）- benzene（ XDC） and dimethyldodecylamine.The chemical structure of the purified product was confirmed by FT- IR,~1H NMR and~ （13） C NMR. The XBDDMA and AEO_9 were blended with different molar ratio,as well as the critical micellar concentration（ cmc）,equilibrium surface tension（ γ_（cmc）） and dynamic surface tension of the blend system were studied. The results showed that as n（ XBDDMA） ∶ n（ AEO_9） is at the range of 1∶ 9- 9∶ 1,following the increase of content of XBDDMA,the cmc of the blend system decreases firstly and then increases,while the area occupied by the surfactant（ A_（min）） decreases continuously. When n（ XBDDMA） ∶ n（ AEO_9） = 1∶ 1,the cmc of the blend system is the smallest,which is 2. 27 × 10^（- 6）mol / L,and the γcmcis 33. 06 m N / m,which is also the smallest. The addition of XBDDMA reduces the initial diffusion energy,which reduces the dynamic surface activity of AEO_9,and there is no synergism effect on the dynamic surface activity between XBDDMA and AEO_9.

关 键 词：季铵盐 双子表面活性剂 复配体系 协同效应 动态表面张力 

分 类 号：TQ423[化学工程]