A series of novel fluorinated analogues of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) surfactants, the sodium salt of bis(3,3,4,4,5,5,6,6,6-nonafluoro-1-hexanol) sulfosuccinate (CF3(CF2)3CH2CH2OOCCH2CH(SO3Na)COOCH2CH2(CF2)3CF3, di-HCF5), the sodium salt of bis(2,2,3,4,4,4-hexafluoro-1-butanol) sulfosuccinate (CF3CFHCF2CH2OOCCH2CH(SO3Na) COOCH2CF2CFHCF3, di-HCF3), the sodium salt of bis(2,2,3,3- tetrafluoro-1-propanol) sulfosuccinate (HCF2CF2CH2OOCCH2CH(SO3Na)COOCH2CF2CF2H, di-HCF2), and the sodium salt of bis(2,2,3,3,3-pentafluoro-1-propanol) sulfosuccinate (CF3CF2CH2OOCCH2CH(SO3Na)COOCH2CF2CF3, di-CF2), were synthesized and characterized by 1H NMR, 13C NMR, 19F NMR and FT-IR spectroscopy, melting point, and elemental analysis. The pressure–temperature phase behavior for water-in-CO2 microemulsions stabilized by the four surfactants was tested and the P–T diagrams were determined. In the phase behavior experiments, pressures up to 35 MPa, temperatures up to 65 uC, and water-to-surfactant molar ratios (Wo) from 10 to 30 were tested. The cloud-point pressure in microemulsions stabilized by the four fluorinated surfactants increased with increasing temperature, and at a fixed temperature, the cloud-point pressure increased with increasing Wo. However, the cloud-point pressure was only slightly affected by an increase in the concentration of surfactant at a settled Wo. The phase behavior for water-in-CO2 microemulsions at different Cd(NO3)2 concentrations in the aqueous phase with the surfactant di-HCF5 was also determined, which is useful for the formation of CdS nanoparticles in our future studies.

A series of fluorinated analogues of AOT, the sodium salt of bis(3,3,4,4,5,5,6,5,7,7,8,8,8-tridecafluorooctyl)-2-sulfosuccinate (CF3(CF2)5CH2CH2OOCCH2CH(SO3Na)COOCH2CH2(CF2)5CF3, di-HCF7),the sodium salt of bis(2,2,3,3,4,4,5,5-octafluoro-1-pentyl)-2-sulfosuccinate (H(CF2)4CH2OOCCH2CH-(SO3Na)COOCH2(CF2)4H, di-HCF4), and the sodium salt of bis(2,2,3,4,4,4-hexafluorobutyl)-2-sulfosuccinate(CF3CHFCF2CH2OOCCH2CH(SO3Na)COOCH2CF2CHFCF3, di-HCF3), were synthesized and characterized by 1HNMR. The pressure-temperature phase diagrams for W/CO2 microemulsions stabilized by the three surfactants were determined. At a fixed temperature, cloud point pressures increased with increasing water-to-surfactant ratio. The water solubilization capacity increased in the order di-HCF4 > di-HCF3 > di-HCF7.

A highly dispersed nanocrystalline rutile powder (NRP) having ultrafine and narrow-distributed diameters was successfully prepared via an improved conventional liquid one-step method by introducing dioctyl sulfosuccinate sodium salt (AOT) surfactant in the peptization reaction anaphase. The average grain size of the product is 10–20 nm. The effects of the titanium tetrabutoxide (Ti(OBu)4) to ethanol volumetric ratio, the precipitation temperature, the peptization temperature and the presence of dioctyl sulfosuccinate sodium salt (AOT) on the preparation of NRP were studied. A new procedure for synthesizing NRP is proposed, and the optimum conditions for preparing NRP were obtained. The TEM, XRD, SEM and FT-IR results were also investigated in this work.

综述了苎麻纤维的改性原理以及苎麻纤维碱法、液氨、烷基化、磺化、氰乙基化、离子液体、阳离子、纳米粒子等改性工艺的最新进展，探讨了超临界流体苎麻纤维的改性。

A modification procedure for ramie fiber using 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (CHPTAC) as a cationic agent and NaOH as a catalyst was developed in this paper. The morphological and structutal transformations of the fiber induced by modification were determined by XRD(XRD),differential scanning calorimetry (DSC), and thermogravimetry analysis(TGA).XRD results show that the crystal structure of the modified fiber was still preserved although its crystallinity was decreased, which was confirmed from the TGA results. The mechanisms for the modification and dyeing of ramie fiber were analyzed,and the optimum modification conditions were determind to ba the CHPTAC concentration of 30gL-1, the NaOH concentration of 15gL-1,the reaction temperature of 50℃,and the reaction time of 60 min.The raw and the modified fibers were dyed with C.I. reactive red 2. The K/S values for the cationic modified fiber increased to be three times as high as the unmodified fiber. The dye uptakes increased greatly with an increase in the nitrogen contents up to 0.4% on the modified fibers.