共查询到20条相似文献，搜索用时 93 毫秒
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综述了合成含1,3-二氧杂环戊(己)烷可降解缩醛(酮)型表面活性剂的合成方法,为该类表面活性剂的合成路线设计提供参考。 相似文献
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缩醛（酮）型表面活性剂是一类可分解的表面活性利。本文分别介绍了环状缩醛、烷基葡萄糖苷和链状缩醛型聚醚等3种类型表面活性剂的合成方法。为该类表面活性剂的合成路线设计提供参考,并指明了今后的主要研究方向。 相似文献
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综述了含有1,3 -二氧六环的双羧酸盐和双磺酸盐型可断裂表面活性剂的合成及性质 ,参考文献19篇 相似文献
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傅中 《广东轻工职业技术学院学报》2017,(2):5-13
有机硅季铵盐表面活性剂是性能最为优良的表面活性剂之一,兼具有机硅材料的优良性能和无机季铵盐的良好抗菌活性,在工农业各领域具有广阔的应用,综述了有机硅季铵盐表面活性剂的合成方法及在抗菌、日用化学品、农药等行业中的应用。 相似文献
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通过表面活性剂辅助法在同一体系内水热合成了均一超长的VOx·nH2O纳米线、纳米带。纳米线长15～20μm宽约为30～40nm;纳米带的长为20-30μm,宽为200-300nm。采用XRD和TEM对产物进行了表征,并对反应机理进行了研究,同时对溶液的pH、反应时间和表面活性剂的用量对产物形貌的影响都进行了研究。 相似文献
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通过表面活性剂辅助法在同一体系内水热合成了均一超长的VOx·nH2O纳米线、纳米带。纳米线长15～20μm宽约为30～40nm;纳米带的长为20-30μm,宽为200-300nm。采用XRD和TEM对产物进行了表征,并对反应机理进行了研究,同时对溶液的pH、反应时间和表面活性剂的用量对产物形貌的影响都进行了研究。 相似文献
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合成了3种阳离子表面活性剂CTAB、16-3-16和16-3(OH)-16,并通过荧光光谱研究了它们与DNA在盐溶液中的相互作用。该实验包含合成操作、光谱分析等化学实验基本技能,涉及到有机化合物合成表征、荧光数据分析等化学理论知识,可作为化学专业的综合实验,有利于巩固学生的理论知识,培养学生对化学知识的综合应用。 相似文献
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Enhancing the dispersion and dissolution of substrate particles in substrate water suspension is a feasible way to improve steroid bioconversion. The aim of the present study is to investigate the effects of applying surfactant to microbial conversion system on the dispersion, solubilization and in turn bioconversion of steroid substrate. The model system is hydroxylation of substrate 19α- 17α-epoxy- 4-pregnene- 3.2It-dine by microbial enzymes from Rhizopus nigricanl. The results show that the presence of substrate leads to an increase in critical micelle concentration （ CMC） of surfactant PSE compared with the normal CMC of PSE in aqueous solution. The grinding time during substrate suspension preparation affects the substrate aqueous solubility differently with the varied surfactant concentrations while barely making any difference in substrate solubility in the absence of surfactant. The properly prolonged grinding time can make up for the loss in substrate solubility arising from the reduction in surfactant concentration. The surfactant complexes composed of surfactants PSE and MGE at appropriate ratios are screened out with orthodoxy experiment method. the interaction between PSE and MGE exerts the most prominent effects on substrate bioconversion, and the surfactant complexes show more beneficial effects on steroid bioconversion than the surfactant PSE used alone. 相似文献
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采用盐酸对甲苯胺法测定日常生活中常用的5种洗衣粉中表面活性剂十二烷基苯磺酸钠的含量及去污能力,结果表明可以采用本方法进行洗衣粉中表面活性剂十二烷基苯磺酸钠含量的测定。同时也说明了洗衣粉中表面活性剂含量适度高些,去污效果就越好。 相似文献
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基于表面活性剂的浊点现象所建立的浊点萃取是一种绿色环保的萃取方法．本文选用非离子表面活性剂TX-114作浊点萃取剂,研究了由酸性大红与活性紫构成的单元和二元混合染料模拟有色废水的萃取脱色过程,讨论了表面活性剂浓度、染料浓度、盐浓度、平衡温度、平衡时间等因素对萃取效率的影响．结果表明,提高表面活性剂浓度、盐浓度有利于提高萃取效率,而染料浓度增加则使萃取效率略有下降．在由活性紫和酸性大红构成的单元和二元混合染料体系中,酸性大红的萃取脱除率明显较活性紫高,混合染料体系的萃取脱色行为与单染料体系的脱色行为相近． 相似文献
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Shweta Saxena 《Resonance》2005,10(8):91-96
Lung surfactant, a lipo-protein complex, is a highly surface-active material found in the fluid lining the air-liquid interface
of the alveolar surface. Surfactant plays a dual function of preventing alveolar collapse during breathing cycle and protection
of the lungs from injuries and infections caused by foreign bodies and pathogens. Varying degrees of structure-function abnormalities
of surfactant have been associated with obstructive lung diseases, respiratory infections, respiratory distress syndromes,
interstitial lung diseases, pulmonary alveolar proteinosis, cardiopulmonary bypass surgery and smoking. For some pulmonary
conditions, especially respiratory distress syndrome, surfactant therapy is on the horizon. 相似文献
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陈丽华 《陕西理工学院学报(社会科学版)》1997,(6)
通过分析表面活性剂的化学结构与HLB值之间的关系，引用戴维斯的HLB基数，对决定表面活性剂性质的关键因素HLB进行了讨论，为表面活性剂的研究、产品开发、实际生产、综合应用提供了重要的参考数据． 相似文献
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Enhanced degradation of carbon tetrachloride by surfactant-modified zero-valent iron 总被引：1，自引：0，他引：1
Sorption of carbon tetrachloride （CT） by zero-valent iron （ZVI） is the rate-limiting step in the degradation of CT, so the sorption capacity of ZVl is of great importance. This experiment was aimed at enhancing the sorption of CT by ZVI and the degradation rate of CT by modification of surfactants. This study showed that ZVI modified by cationic surfactants has favorable synergistic effect on the degradation of CT. The CT degradation rate of ZVI modified by cetyl pyridinium bromide （CPB） was higher than that of the unmodified ZVI by 130%, and the CT degradation rate of ZVI modified by cetyl trimethyl ammonium bromide （CTAB） was higher than that of the unmodified ZVI by 81%. This study also showed that the best degradation effect is obtained at the near critical micelle concentrations （CMC） and that high loaded cationic surfactant does not have good synergistic effect on the degradation due to its hydrophilicity and the block in surface reduction sites. Furthermore degradation of CT by ZVI modified by nonionic surfactant has not positive effect on the degradation as the ionic surfactant and the ZVI modified by anionic surfactant has hardly any obvious effects on the degradation. 相似文献
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本文通过光谱法研究了生物染料试剂甲苯胺蓝（ＴＢ）在水溶液中的聚集状态,及其表面活性剂十二烷基硫酸钠（ＳＬＳ）、无机盐ＮａＣｌ对其聚集状态的影响。通过对在不同条件下甲苯胺蓝吸光度的分析,得出如下结论：ＮａＣｌ可使甲苯胺蓝（ＴＢ）的双聚体解聚;表面活性剂对甲苯胺蓝的聚集状态有很大的影响 相似文献
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Transactions of Tianjin University - In this study, we investigated the synergistic effect of a zwitterionic surfactant (cocamidopropyl betaine) and amino acid surfactant (sodium lauroyl... 相似文献
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HeZhanbopointedout[1] thatsurfactantscanbeusedtomakenewchemicaloscillatorsinaqueoussolution ,suchasbromateoscillator[2 ] andpermanganateoscillator[3] .Untilnow ,however,thereisnotanyelectrochemicaloscillatorre latedwithsurfactant. Anelectrochemicaloscillatorisoneofthefirstdisco veriesofchemicaloscillators .Todayhundredsofarticleshavebeenpublished[4— 6 ] aboutelectrochemicaloscillators.Theyprovidematerialstoenrichmaturetheoriesandmecha nisms[7— 8] .InourexperimentsweusedaDaniellcellasele… 相似文献