摘要
以十六醇聚氧乙烯(3)醚为原料,经羧甲基化合成了十六醇聚氧乙烯醚羧酸钠,产率最高达到83.8%。产品经红外光谱和质谱表征为十六醇聚氧乙烯醚(n)羧酸盐(C16AEC,n=1～3)。研究表明,C16AEC具有优良的抗Na+能力,45℃下对NaCl的容忍度达到135 g.L-1,与典型的耐盐型表面活性剂十二醇聚氧乙烯醚(3)硫酸盐(AES)相当;但C16AEC抗二价离子(Ca2+和Mg2+)的能力一般,45℃下对CaCl2和MgSO4的容忍度仅为0.5和1.8 g.L-1,远不如AES;C16AEC微乳体系的最佳盐度(NaCl)和中相盐宽亦与AES微乳体系接近;C16AEC具有优良的表面活性,25和45℃下临界胶束浓度(cmc)都在10-5mol.L-1数量级,γcmc小于30 mN.m-1;C16AEC具有较好的亲油性,通过与两性表面活性剂复配,45℃下可在0.1%～0.3%的总质量浓度范围内使大庆原油/地层水界面张力降到10-3mN.m-1数量级,无需添加任何碱或中性电解质。
Synthesis as well as salt tolerance and interfacial properties of polyoxyethylene（3） cetyl ether carboxylate（C16AEC） was investigated.Results showed that C16AEC can be synthesized by using polyoxyethylene（3） cetyl ether as starting material and a maximum yield,83.8%,can be achieved at appropriate conditions.Chemical structure of the product was characterized by IR and MS spectra.C16AEC has a high tolerance to Na＋,as NaCl aqueous solution with mass concentration of 135 g·L-1 at 45 ℃,which is similar to that of typical salt resisting surfactant polyoxyethylene（3） lauryl ether sulfate（C12AES）.However,tolerance to di-valence ions（Ca2＋ and Mg2＋） of C16AEC shows a common value as mass concentration of 0.5 and 1.8 g·L-1 of CaCl2 and MgSO4 aqueous solution respectively.Optimum salinity and middle phase salinity range of C16AEC microemulsions are also similar to that of C12AES.Surface active properties of C16AEC are excellent as indicated by its low cmc at an order of magnitude of 10-5 mol·L-1 under both 25 and 45 ℃ and low γcmc of less than 30 mN·m-1.C16AEC shows good lipophilicity.By blending with amphoteric surfactants,and at a total surfactant mass fraction of 0.1%~0.3% under 45 ℃,C16AEC can reduce the interfacial tension of Daqing crude oil/strata water to an order of 10-3 mN·m-1 without adding any alkaline or neutral electrolyte.
出处
《日用化学工业》
CAS
CSCD
北大核心
2012年第2期88-92,共5页
China Surfactant Detergent & Cosmetics
关键词
十六醇聚氧乙烯醚羧酸盐
合成
耐盐性
表面张力
界面张力
polyoxyethylene cetyl ether carboxylate
synthesis
salt tolerance
surface tension
interfacial tension
