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1.
含氟表面活性剂及其应用   总被引:9,自引:0,他引:9  
王大枋 《杭州化工》2001,31(2):6-10
介绍了含氟表面活性剂的特性、制备及其应用。  相似文献   

2.
氟表面活性剂的研究与应用现状   总被引:8,自引:0,他引:8  
含氟化合物由于其分子结构的特殊性使这类化合物具有优越的物理化学性能,被用于军事和航空航天等尖端科学领域以及化工和医学等各个部门,已成为化工和化工新材料的重要门类。氟表面活性剂又是含氟化合物用途最多的一类。  相似文献   

3.
介绍了氟表面活性剂的主要物理化学性质及合成方法。  相似文献   

4.
5.
讨论了氟表面活性剂3种较为成熟工业合成方法,即电解氟化法、氟烯烃调聚法和氟烯烃齐聚法等,比较了3个方法的优缺及各自有待解决的问题.介绍了氟表面活性剂的特殊性能及目前在一些领域的特殊应用.认为我国研制氟表面活性剂在性能、种类、价格及应用领域上与国外相比尚有较大差距;应充分利用自身市场优势.抓住机遇.提高合成技术、工艺,降低成本.  相似文献   

6.
氟表面活性剂的工业应用   总被引:1,自引:0,他引:1  
王涛  李峰 《日用化学工业》2011,41(4):285-288
介绍了氟表面活性剂的分类、结构及性质;主要综述了由于氟表面活性剂具有"三高"、"两憎"的独特性能,广泛应用于消防、皮革、石油、造纸、纺织印染及金属材料加工等工业领域,起到普通碳氢表面活性剂所不能的作用;指出了根据应用领域的不同,应从分子结构设计入手,有针对性地、有目的地研发氟表面活性剂新品种新工艺,拓展应用领域,注重氟表面活性剂与普通表面活性剂的复配研究。  相似文献   

7.
综述了氟硅表面活性剂的合成方法,简述了氟硅表面活性剂的类别特征及其研究现状,介绍了氟硅表面活性剂的性能优点及其应用。  相似文献   

8.
氟表面活性剂在油田领域的应用   总被引:1,自引:0,他引:1  
氟表面活性剂具有高稳定性、高表面活性、憎水憎油性等应用特点,因而在油田钻井领域、采油领域以及集输领域具有广泛的应用空间。通过氟表面活性剂在油田领域的应用进行探究,分析氟表面活性剂的特点、氟表面活性剂在各领域的应用,以促进氟表面活性剂的应用价值和社会效益的提升。  相似文献   

9.
碳氟表面活性剂   总被引:27,自引:4,他引:27  
介绍了碳氟表面活性剂的主要物理化学性质,合成方法,国际,国内碳氟表面活性剂的发展及现状。介绍了碳氟表面活性剂的最新进展,特别是一些新型碳氟表面活性剂的主要性质和用途。分析了我国碳氟表面活性剂发展缓慢,与国外形成巨大反差的原因,并对进一步发展我国的碳氟表面活性剂工业提出了自己的看法。  相似文献   

10.
非离子氟硅表面活性剂的制备   总被引:1,自引:0,他引:1  
在科学和商业上对低表面张力的水性表面活性剂的兴趣越来越大.传统有机表面活性剂降低水的表面张力的性能已经被有机硅表面活性剂和氟炭表面活性剂这两大类材料所超越,前者通常是基于甲基硅氧烷,能使水的表面张力达到20~21mN/m:后者可以把水的表面张力减少到20mN/m以下.有报道可低到13mN/m.  相似文献   

11.
Nonionic surfactants having polydisperse polyoxyethylene chains and highly fluorinated hydrophobes were synthesized via a complex reaction route and their adsorption at water/air interfaces studied. They exhibit high surface activity and decrease both effectively and efficiently the surface tension of their aqueous solutions. The effect of the length of the polyoxyethylene chain upon surfactant surface activity is relatively low. Lower values of surface tension, below 30 mN m?1, are obtained for surfactants having a low degree of ethoxylation. Surfactants having two terminal highly fluorinated hydrophobes are less surface active than analogues with one terminal hydrophobe.  相似文献   

12.
以聚乙二醇、全氟丁酸为主要原料,采用直接酯化的方法,合成了一系列聚乙二醇系非离子型氟碳表面活性剂——聚乙二醇全氟丁酸酯(以单酯为主,且含有少量双酯),且对其红外光谱、表面张力、临界胶束浓度、浊点进行了测试。结果表明,该类氟碳表面活性剂具有很高的表面活性,同时,随PEG链段长度的变化,其表面张力、CMC值、浊点都发生规律性的变化。  相似文献   

13.
张昱  张永明 《现代化工》2011,31(4):49-52
以六氟环氧丙烷和壬基酚聚氧乙烯醚40为原料,使用齐聚法合成一种新型非离子型氟碳表面活性剂C9H19C6H4O(CH2CH2O)40C9F17O3,运用傅里叶变换红外光谱仪(FT-IR)和核磁共振波谱仪(NMR)对其结构进行表征,并对其表面性能进行测试和计算。结果表明,该表面活性剂能将水的表面张力最低降至21.2 mN/m,其临界胶束浓度cm c为8.32×10-6mol/L,γcm c为26.5 mN/m。  相似文献   

14.
由于氟碳表面活性剂独特的优点,它在各个领域已得到广泛的应用,因此,氟碳表面活性剂的合成方法也成为目前研究的热点。该文分类总结了各种类型氟碳表面活性剂的制备方法,并概述了一些新型氟碳表面活性剂的合成,且对氟碳表面活性剂未来的发展进行了展望。  相似文献   

15.
Solubilization of decafluorobiphenyl (FBIP) by surfactants in aqueous solution was examined to investigate the properties of micelles composed of surfactants having a per-fluorocarbon chain. Fluorocarbon surfactants solubilize FBIP better than hydrocarbon surfactants. Significant solubilization by fluorocarbon surfactants was observed upon addition of salt. Highly synergistic solubilization of FBIP using surfactant mixtures was also observed for fluorocarbon and hydrocarbon surfactants in the presence of salt. The high solubilization ability of surfactants can be attributed to micelle growth. A simple geometrical consideration of molecular packing in micelles revealed that the characteristic micelle is composed of bulky fluorocarbon chains. The solubilization behavior accompanied by micelle growth would be closely associated with a change in interfacial contact area between the micelle core and bulk water. The behavior of fluorescence intensity of micelle-solubilized FBIP also indicated a change in micropolarity of fluorocarbon micelles accompanied by micelle growth.  相似文献   

16.
十二烷基硫酸钠与氟碳表面活性剂混合体系的溶液性能   总被引:4,自引:0,他引:4  
测定新型非离子氟碳表面活性剂(Intechem-01)与十二烷基硫酸钠(SDS)混合体系的表面张力、cmc、泡沫性能,研究了两者之间的相互作用。结果表明:Intechem-01与SDS质量比为3:1时,体系表面张力最低,cmc最小,体系出现最大协同效应;并且Intechem-01显示了良好的稳泡性能,当其与SDS质量比为5:1时,混合体系25%析液时间可达99.2s。  相似文献   

17.
以脂肪胺、三聚氯氰、氨基乙磺酸为原料合成了4种不同碳链长度均三嗪脂肪磺酸盐型表面活性剂[2-脂肪胺基-4-(2-磺基乙基)胺基-6-氯-1,3,5-均三嗪]。用元素分析、1HNMR、FTIR对中间体和目标产物的结构进行了表征。测定了25℃时4种表面活性剂的表面张力,研究了它们的表面活性。结果表明,疏水链长为C14时,该类表面活性剂的临界胶束浓度(cmc)和cmc下的表面张力(γcmc)达到最低值分别为:3.58×10-5mol/L和32.53 mN/m。与普通表面活性剂C12-LAS相比,疏水链长为C12~C16的该类表面活性剂的cmc均比C12-LAS低1~2个数量级,即它们降低水溶液表面张力的效率比C12-LAS高;疏水链长为C8、C12和C16时,其在溶液表面的饱和吸附量均比C12-LAS小,饱和吸附面积比C12-LAS大;疏水链长为C14时则相反。  相似文献   

18.
Solubilization of octafluoronaphthalene (OFN) by fluorocarbon and hydrocarbon surfactants in aqueous solutions has been examined to investigate the effects of mixing surfactants and added salt. Diethylammonium perfluoronanoate (DEAPFN) micelles have the most solubilization power toward OFN. The difference in micellar solubilization power will be caused by the hydrophobicity of ionic groups and micellar size. Large positive synergistic effects on solubilization behavior were observed in the DEAPFN-diethylammonium tetradecyl sulfate mixed micellar systems. Solubilization of OFN depended on the concentrations of added salt and the aggregation number, that is, the micellar size.  相似文献   

19.
The critical micelle concentrations (CMC) of nine commercial nonionic surfactants (Tween 20, 22, 40, 60, and 80; Triton X-100; Brij 35, 58, and 78) and two pure nonionics [C12(EO)5 and C12(EO)8] were determined by surface tension and dye micellization methods. Commercially available nonionic surfactants (technical grade) usually contain impurities and have a broad molecular weight distribution owing to the degree of ethoxylation. It was shown that the surface tension method (Wilhelmy plate) is very sensitive to the presence of impurities. Much lower CMC values were obtained with the surface tension method than with the dye micellization method (up to 6.5 times for Tween 22). In the presence of highly surfaceactive impurities, the air/liquid interface is already saturated at concentrations well below the true CMC, leading to a wrong interpretation of the break in the curve of surface tension (γ) vs. concentration of nonionic surfactant (log C). The actual onset of micellization happens at higher concentrations, as measured by the dye micellization method. Furthermore, it was shown that when a commercial surfactant sample (Tween 20) is subjected to foam fractionation, thereby removing species with higher surface activity, the sample yields almost the same CMC values as measured by surface tension and dye micellization methods. It was found that for monodisperse pure nonionic surfactants, both CMC determination methods yield the same results. Therefore, this study indicates that precaution should be taken when determining the CMC of commercial nonionic surfactants by the surface tension method, as it indicates the surface concentration of all surface-active species at the surface only, whereas the dye method indicates the presence of micelles in the bulk solution.  相似文献   

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