Study on Room-Temperature Phosphorescence of 1-Bromonaphthalene in Media of Surfactant and β-Cyclodextrin

Sdrictants(S) induced room-ternperature phorphorescence(RTP) frorn l-bromonaplithalene(l-BrN) in aerated aqueous solutions of o-cyclodextha(β-CD) hasbeco mvestigated m detail. lt has been fotmd that the partial incIu5ion and coil ofhydIocarbon chain of edctans at the mouth of the 6-CD ca\4ty' is reSPoedle foTbright RTP

An Inquiry into the Application and Preparation of Surfactant in Oil Field

As a commonly used chemical agent,surfactant is used to improve the efficiency of oil-and-gas exploitation.Since the conventional surfactant technology fails to meet the requirements of oil-and-gas resources exploitation currently,this paper deeply researches on the studies of cutting-edge technology of oil-and-gas exploitation,and learns the advanced experience from foreign countries.It aims to point out that the needs of China’s demand for oil-and-gas exploitation can be met with through technology innovation,preparation methods improvement and key technology mastery of surfactant in oil field.

Interaction between Cationic Surfactants and Bromopyrogallol Red as well as Its Application for the Sensitive and Selective Determination of Mo in Mo/W Binary Mixtures

Prior to formation of the micelles of cationic surfactant (CSF), bromopyrogallol red (BPR) could exist in the forms of both monomer and oligomer After that, however, only BPR monomer existed. Nonionic surfactant OP-10 favoured the oligomerization of BPR monomer. The mixed micellar media prepared by mixing CSF and OP-10 in an appropriate ratio could be used for the sensitive and selective determination of Mo in Mo/W binary mixtures.

Progress in synthesis and application of zwitterionic Gemini surfactants

Zwitterionic Gemini surfactants have the Gemini molecular structure in which there are both multiple lipophilic groups and multiple hydrophilic groups.However,their hydrophilic groups have different charges.Due to the special molecular structure,this kind of surfactants possesses excellent properties,including high surface activities,isoelectric point(IP),low critical micelle concentration(CMC),less toxicity,low irritating,biodegradability,bioactive,interface modification,and so on.In this review,synthetic strategies of three kinds of zwitterionic Gemini surfactants,i.e.,an ioniccationic,cationic-nonionic and anionic-nonionic Gemini surfactants,are discussed,and their potential applications in life sciences,chemical industry and enhanced oil recovery(EOR)are illustrated.Their future development is also prospected.

Comparative studies on molecular induced aggregation of hepta-imidazoliumyl-β-cyclodextrin towards anionic surfactants

A β cyclodextrin derivative bearing seven cationic arms and its singly charged analogue, i.e., per-6- deoxy-f-（1-methylimidazol-3-ium-3-yl）-β-cyclodextrin （3） and mono-fi-deoxy-6-（1-methylimidazol- 3-ium-3-yl）-β-cyclodextrin （4） were synthesized and fully characterized. Their induced aggregation behaviours towards two anionic surfactant, that is, sodium dodecyl sulfonate （SDS） and dioctyl sodium sulfosuccinate （Aerosol OT, AOT）, were investigated by UV-vis, NMR, Zeta-potential, dynamic light scattering （DLS）, and transmission electron microscopy. The results revealed that host 3 can induce the molecular aggregation of anionic surfactant at concentration far lower than its original CAC, leading to the larger diameter, the narrower size distribution and the higher thermal stability of the induced aggregate towards the anionic surfactant possessing more hydrophobic tails.

Synthesis and application of non- bioaccumulable fluorinated surfactants: a review

Due to negative effects of conventional fluorinated surfactants with long perfluorocarbon chain(C_(x)F_(2x+1),x≥7)like perfluorooctanoic acid(PFOA)and perfluorooctane sulfonate(PFOS),these conventional long perfluorocarbon chain surfactants have been restricted in many industrial applications.Nowadays,their potential non-bioaccumulable alternatives have been developed to meet the requirements of environmental sustainable development.In this paper,the recent advances of potential non-bioaccumulable fluorinated surfactants with different fluorocarbon chain structures,including the short perfluorocarbon chain,the branched fluorocarbon chain,and the fluorocarbon chain with weak points,are reviewed from the aspects of synthesis processes,properties,and structure-activity relationships.And their applications in emulsion polymerization of fluorinated olefins,handling membrane proteins,and leather manufacture also are summarized.Furthermore,the challenges embedded in the current non-bioaccumulable fluorinated surfactants are also highlighted and discussed with the hope to provide a valuable reference for the prosperous development of fluorinated surfactants.

Room temperature phosphorescence study on supramolecular system of cyclodextrin/surfactants

THE microenvironmental properties of cyclodextrin/surfactants supramolecular system have been investigated with a variety of methods. Usually, a 1:1 stoichiometry of cyclodextrin/surfactant and noneffectiveness of cyclodextrin on the micellization behavior are

Interaction of cyclodextrins with 1,3-di(1-naphthyl)propane and the additive effects of ionic surfactants

The interaction between cyclodextrins (CDs) and 1,3-di(1-naphthyl)propane (1) in aqueous methanol (V: V=1:1) has been investigated by means of fluorescence emission and UV absorption. Fluorescence enhancement and absorption spectra reveal that β- or γ-CD can form inclusion complexes with 1, but α-CD cannot. One of these complexes is identified as ground state complex (2:1), i.e. the eclipsed conformer of 1 is included. Molecule 1 can be driven out of the CD cavity by sodium dodecylsulfate (SDS) molecule, but cannot by cetyltrimethylammonium bromide (CTAB) or sodium cetylsulfate (SCS) molecules due to their alkyl chain coiling.

食品中自微乳体系的组成、制备及促进生物活性物质生物利用的研究进展

随着人们健康膳食意识的增强,开发食品功能作用引起了人们的广泛关注。自微乳体系是一种由油相、表面活性剂、助表面活性剂和生物活性物质以一定比例混合后形成的无水预浓缩体系。通过自微乳体系荷载食品生物活性物质可改善其生物利用度,并充分发挥其生理及药理活性。本文系统综述了自微乳的基本性质、组分及制备方法,整理了近年来自微乳体系在食品领域促进生物活性物质生物利用的应用实例,为自微乳体系在食品领域的推广应用提供了参考。

氟表面活性剂的合成及油田应用的最新进展(续完)

1.5 gemini型氟表面活性剂.gemini表面活性剂因其独特的化学结构而广受关注。传统表面活性剂为单头单尾,而gemini表面活性剂则是双头双尾,头基间通过间隔基连结。gemini表面活性剂的物理化学性质包括较低的cmc和高于单体(常规)表面活性剂的表面性能。为寻找长碳氟链氟表面活性剂的替代品,Du等合成了一系列含有全氟醚链的gemini表面活性剂,并对其表面张力进行了研究。采用酰胺化反应和季铵化反应两步合成了gemini表面活性剂。在第1步中,N,N-二甲基-1,3-丙二胺分别与氟化酯或酰氟反应生成氟化酰胺中间体。第2步,该中间体与二溴化物反应,通过季铵化得到gemini表面活性剂(图17)[46]。

石油污染土壤修复及表面活性剂强化研究进展

石油污染土壤对生态环境和人体健康具有重大危害,物理、生物和化学修复技术是处理石油污染土壤常用的方法,但石油污染物在土壤中的吸附却限制了修复效果;表面活性剂对吸附于土壤中的疏水性有机污染物的解吸和迁移具有很好地促进作用,在石油污染土壤修复中发挥着越来越重要的作用。本文介绍了物理、生物和化学修复技术的研究现状和优缺点;阐述了表面活性剂的分类和作用机理,综述了表面活性剂与电动修复、生物修复和化学氧化修复联合应用的研究进展,简要介绍了应用表面活性剂的限制因素和环境风险。

油酸在液体织物洗涤剂中的应用研究

植物源油酸是一种利用可再生资源生产的表面活性剂,在液体洗涤剂中有广阔的应用前景。从油酸、脂肪醇聚氧乙烯醚和脂肪醇聚氧乙烯醚硫酸钠及其复配体系的表面张力、发泡力、润湿时间和去污力等性能指标研究的结果表明,油酸具有很好的降泡和增黏作用,尽管其不耐硬水和易氧化的缺点限制了其在洗衣液中的添加量,但植物源油酸通过复配依然是一款适用于液体织物洗涤剂中的表面活性剂原料。

表面活性剂在MOFs材料制备中的应用

金属有机骨架材料(Metal-Organic Frameworks,MOFs)具有比表面积大、孔径可调、性能可控等突出优点,在气体存储、吸附与分离、催化反应、传感等领域中有广泛的应用前景。表面活性剂在MOFs材料制备中,可以控制晶体的尺寸、孔径和几何形状,还可以限制纳米晶体的纵向生长,促进2D结构的形成,且制备出的MOFs材料结构稳定、不易坍塌。综述了常规表面活性剂和双子表面活性剂、离子液体表面活性剂等特种表面活性剂在MOFs材料制备中的应用,如用作模板剂、封端剂等。对表面活性剂在实现多级孔MOFs形貌和孔隙率的精确控制、特种表面活性剂及应用等进行了展望,为表面活性剂在MOFs材料制备中的应用指明了方向,也为MOFs材料的制备提供了更加丰富的路径。

甲氧苄啶增溶技术研究

本文首先测定了甲氧苄啶在水中的溶解度,然后采用表面活性剂增溶、β环糊精包合、固体分散体等药剂学常用增溶技术对甲氧苄啶开展了溶解度提升研究。实验结果显示,甲氧苄啶在水中的溶解性为0.31 mg/mL,使用表面活性剂增溶、β环糊精包合、固体分散体三种增溶技术后,甲氧苄啶在水中的最高溶解度分别为0.37 mg/mL、7.06μg/mL和3.3 mg/mL。通过三种药物制剂技术的对比说明,固体分散体制备的最优方法为溶剂法,最优载体为聚维酮K30,最优冷冻时间为2小时,制得甲氧苄啶固体分散体溶液甲氧苄啶的浓度可以达到3.3 mg/mL,与自身溶解度0.31 mg/mL相比,浓度达到甲氧苄啶普通水溶液的10.64倍,有效提高了甲氧苄啶在水中的溶解性。

甜菜碱型表面活性剂的研究进展

甜菜碱表面活性剂是表面活性剂的重要分支之一,具有许多独特的性能,在诸多领域展现出巨大的工业应用价值。综述分别从甜菜碱型表面活性剂的结构和性质、合成方法、溶液性能(包括表面张力、界面张力、稳定性和抗菌性等)和应用(包括灭火剂、润湿剂、抗菌剂、抗氧化剂和抗紫外线剂等)四个维度对甜菜碱型表面活性剂的研究进展进行了全面介绍。

黏弹性表面活性剂复配性能研究及应用

研制清洁压裂液已成为油气田增产发展的趋势,本文对耐90℃的黏弹性表面活性剂复配体系进行研究,筛选出合适的添加剂,复配出最佳比例体系,并测试其耐温、耐剪切性能,对黏弹性表面活性剂的未来趋势进行展望。

一种阴离子Gemini表面活性剂的合成及在皮革工业中应用进展

磺酸盐Gemini表面活性剂是一种含有磺酸基亲水基团的新型阴离子表面活性剂,具有成胶束能力强、润湿性好、水溶性优良、表面吸附性能强、乳化分散性能好、抗菌和杀菌性等显著特点,可作为乳化剂、脱脂剂、加脂剂、印染助剂和涂饰剂等应用于制革工业,磺酸盐Gemini表面活性剂在日用化工、石油开采、纺织造纸、食品工业等领域也具有广泛的用途。研究分析总结了磺酸盐Gemini表面活性剂的合成及在制革工业方面的应用,对磺酸盐Gemini表面活性剂的发展进行了展望。

酯基Gemini双季铵盐表面活性剂的研究进展

Gemini双季铵盐表面活性剂性能优异但生物和化学降解性差,在Gemini双季铵盐表面活性剂结构中引入酯基官能团可以提升产物性能。酯基Gemini双季铵盐表面活性剂含有酯基和双季铵盐基,具有高表面活性、吸附、絮凝、抗盐、湿润、乳化、杀菌防腐和易生物分解等优点,应用前景广阔。本文综述了酯基Gemini双季铵盐表面活性剂的合成路线、性能和石油化工的应用状况,结合发展需求对酯基Gemini双季铵盐表面活性剂的未来发展进行了分析和展望。

环糊精超分子自组装包合机制研究进展

环糊精因具有独特的“外亲水、内疏水”结构,可作为一种优良的包合载体对性质活泼、易挥发、易氧化分解的活性组分进行保护,从而达到提高其溶解度、稳定性和生物利用率的效果。本文从环糊精的结构与性质出发,首先对其包合机理进行探究,即分析主体环糊精与客体分子之间的相互作用和影响因素,包括环糊精单体与客体之间的包合反应、环糊精单体之间的自组装行为以及该行为下所形成的超分子体系与客体分子的包合机制;接着阐述有无表面活性剂存在的情况下环糊精界面稳定机制、表面活性剂与环糊精自组装形成复合乳化剂协同稳定客体机制等;然后,对环糊精包合物中客体分子的释放机制、缓释动力学模型及相应的影响因素进行解析;最后,从分子模拟及界面稳定机制方面对环糊精在超分子领域的研究进行展望,以期为后续研究提供参考。

非离子表面活性剂在绿色液体洗涤剂中的应用研究

针对绿色非离子表面活性剂烷基糖苷、脂肪醇聚氧乙烯醚在液体洗涤剂中的应用配方进行了研究。通过对体系表面活性剂表面张力、洗涤剂去污率变化的分析,根据正交实验数据优选复配比例,配方选用环保型洗涤助剂作代磷试剂,并对液体洗涤剂中甲醛含量的安全性能进行了考察。非离子表面活性剂与离子型表面活性剂复配,有效降低溶液表面张力,提高体系活性。目标产品洗涤性能良好、温和、安全和绿色,对于非离子表面活性剂在液体洗涤剂中的应用提供一定的研究基础。