Jenkins K M, Wettig S D, Verrall R E
Waters Corporation, 34 Maple Street, Milford, Massachusetts 01757, USA.
J Colloid Interface Sci. 2002 Mar 15;247(2):456-62. doi: 10.1006/jcis.2001.8162.
The specific conductance, surface tension, mean aggregation number, and apparent molar volume properties of aqueous solutions of a novel series of N,N'-bis(cyclododecyldimethyl)-alpha,omega-alkanediammonium dibromide (c12-s-c12) surfactants, where s is the spacer chain length, are reported. Surfactants with s = 3, 4, and 6 have been prepared and characterized in terms of their Krafft temperature (T(Kr)), critical micelle concentration (cmc), surfactant head group area (a) at the air-water interface, mean aggregation number (N(agg)), and the volume change upon micelle formation (deltaV(phi,M)). The c12-3-c12 shows little evidence of aggregate formation, while the results obtained for the c12-4-c12 and c12-6-c12 homologues suggest the formation of small, poorly defined micellar aggregates in aqueous solution.
报道了一系列新型的N，N'-双（环十二烷基二甲基）-α，ω-链烷二溴化铵（c12-s-c12）表面活性剂水溶液的电导率、表面张力、平均聚集数和表观摩尔体积性质，其中s为间隔链长度。制备了s = 3、4和6的表面活性剂，并根据其克拉夫特温度（T(Kr)）、临界胶束浓度（cmc）、气-水界面处的表面活性剂头基面积（a）、平均聚集数（N(agg)）以及胶束形成时的体积变化（deltaV(phi,M)）对其进行了表征。c12-3-c12几乎没有聚集形成的迹象，而c12-4-c12和c12-6-c12同系物的结果表明在水溶液中形成了小的、定义不明确的胶束聚集体。
