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Typical cationic and anionic surfactants were chosen and their interactions were calculated by quantumchemical method. Interaction energies are -0.2378kJ·mol~(-1),-3.3394kJ·mol~(-1) and 0.1204kJ·mol~(-1) for the molec-ular pairs with fluocarbon and hydrocarbon chain: C_4H_(10)/C_5H_(12), C_4F_(10)/C_5H_(12), and C_4F_(10)/C_5F_(12), respectively.When hydrophilic group with cationic and anionicions is introduced, interaction energies are -287.40kJ·mol~(-1),-311.18kJ·mol~(-1) and -345.83kJ·mol~(-1). The results show that there is strong static interaction between cationicand anionic surfactants. It has been predicted that mixed monolayer may be formed and surface activity is en-hanced favorably, especially for mixtures of cationic and anionic surfactants with fluocarbon and hydrocarbonchains. The anionic surfactants, sodium octadecylbenzenesulfonate perfluopolyetherbenzenesulonate(ANF-Ⅰ)wassynthesized, mixture effects of ANF-Ⅰ with sodium octadecylbenzenesulfonate or dodecyldimethyl benzylammonium 相似文献
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全氟聚醚酰胺磺酸钠与碳氢表面活性剂的复配和降粘性能 总被引:1,自引:0,他引:1
将以全氟聚醚羧酸0~2.7kPa下的<130℃馏分和130~150℃馏分为原料制得的两个全氟聚醚酰胺磺酸钠表面活性剂ANF Ⅰ和ANF Ⅱ,分别与十二烷基二甲基苄基溴化铵(ANH)、十八烷基磺酸钠(CAH)或辛基酚聚氧乙烯醚(NOH)等表面活性剂复配,考察了复配物对稠油的降粘性能。结果表明,加入0.03%的复配物,稠油的表面张力降至22~30mN/m。ANF Ⅰ与十二烷基二甲基苄基溴化铵复配的降粘剂DX 1的降粘效果最显著,对渤海绥中稠油或辽河稠油的降粘率为93%~99%,且具有耐高温性能。 相似文献
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全氟聚醚酰胺磺酸钠稠油降粘剂的合成和表面活性 总被引:1,自引:0,他引:1
以全氟聚醚羧酸为原料,合成了全氟聚醚酰胺磺酸钠稠油降粘剂(ANF),考察了反应条件对目的产物的影响。将全氟聚醚羧酸分离为3个不同馏分作原料,得到3个目的产物,并测定它们的结构和表面活性。红外光谱分析的结果表明,它们均为全氟聚醚酰胺磺酸钠(分别标记为ANF-Ⅰ,ANF-Ⅱ和ANF-Ⅲ)。前两个化合物具有很高的表面活性,在14%的乙醇溶液中,ANF-Ⅰ和ANF-Ⅱ的含量为0.1%时,表面张力分别为24.08和25.77mN/m,与含量高10倍的碳氢表面活性剂的表面张力相当。 相似文献
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烷基苯酚聚氧乙烯醚酸碱催化缩聚机理的量子化学研究 总被引:3,自引:3,他引:0
采用MNDO(Modified neglect of diatomic overlap,改进的忽略双原子微分重叠)量子化学方法全优化计算了烷基苯酚与环氧乙烷在酸、碱催化下的SN2缩聚反应位能曲线,探讨了酸、碱催化活性和反应机理。计算得到酸、碱催化下的反应活化能分别为74.6和196.5kJ/mol。酸催化比碱催化具有更高的反应活性。酸、碱催化均按SN2反应机理进行。理论研究很好地解释了酸催化副产物多和碱催化产物纯度高的实验现象。 相似文献
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