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脂肪酸烷醇酰胺酯类表面活性剂的研究进展与发展趋势 总被引:2,自引:1,他引:1
详细介绍了脂肪酸烷醇酰胺硫酸酯、脂肪酸烷醇酰胺磷酸酯、脂肪酸烷醇酰胺硼酸酯三大类脂肪酸烷醇酰胺酯类表面活性剂的合成方法、表面性能及应用领域的研究现状,并展望了其研究开发方向及应用发展趋势。 相似文献
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本文综述了近年来脂肪酸烷醇酰胺衍生物类表面活性剂的研究现状,详细介绍了烷醇酰胺磷酸酯、烷醇酰胺醚羧酸盐、烷醇酰胺硫酸酯、烷醇酰胺硼酸酯等几类表面活性剂的合成方法、表面性能及应用领域,并指出该类表面活性剂因其优良的表面活性和良好的生物降解性具有广阔的发展前景。 相似文献
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以C14~18的脂肪酸与二乙醇胺反应合成了系列脂肪酸烷醇酰胺,再经磷酸化反应及中和反应制备了6种脂肪酸烷醇酰胺磷酸酯盐表面活性剂。分别测定了各产物的组成及表面活性,考察了无机盐对表面张力(γ)及临界胶束浓度(cmc)的影响,测试了不同碱中和产物水溶液与系列烷烃间的界面张力。结果表明,脂肪酸碳数为14,16和18的烷醇酰胺磷酸酯盐表面活性剂的cmc分别为50,50和30 mg/L,γcmc为26~31 mN.m-1;无机盐对产物的cmc影响不大;在质量分数为0.3%时,6种表面活性剂水溶液与正构烷烃形成最低界面张力的最小烷烃碳数为10~16,其中用NaOH中和得到的C14N与十二烷、十四烷以及C16N与十六烷均可达到超低界面张力,分别为0.007 8,0.008 3和0.001 6 mN.m-1,用二乙醇胺中和得到的C14D也可与癸烷达到超低界面张力。 相似文献
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米糠油与二乙醇胺制备烷醇酰胺 总被引:3,自引:0,他引:3
采用资源丰富的米糠油与二乙醇胺反应制备了米糠油烷醇酰胺。其主要工艺参数:原料配比为米糠油脂肪酸:二乙醇胺=1:2,氮气1~1.2kg/cm~2;反应时间3~10h;催化剂氢氧化钾为总量的0.5%。产品得率为95~97%。测定了产物的表面性能和与某些阴离子表面活性剂的配伍性能。表明制得的米糠油烷醇酰胺与椰子油烷醇酰胺的性能基本相同。 相似文献
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天然油脂脂肪酸甲酯及其酰胺衍生物的合成 总被引:3,自引:0,他引:3
本文以天然油脂为原料,采用正交试验的方法,合成制得脂肪酸甲酯,并和二乙醇胺进行酰胺化反应得到脂肪酸烷醇酰胺型非离子表面活性剂,为其进一步的研究奠定了基础。 相似文献
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利用资源丰富的米糠油(RBO)作为制备新型阴离子表面活性剂的原料,原料油脂经水解成游离脂肪酸,再磺化至α—磺基脂肪酸及其相应的盐作为洗涤剂的组份。将米糠油进行工业条件氢化代替牛油,作为肥皂工业硬脂原料,也可将米糠油脂肪酸与二乙醇胺反应,制备与椰子油烷醇酰胺性质相同的非离子表面活性剂。 相似文献
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The effect of temperature on product formation during the sulphonation of indigo with concentrated sulphuric acid and 30 % fuming sulphuric acid was studied with the aid of high performance liquid chromatographic (HPLC) analysis. Trisulphoindigo was prepared by the sulphonation of indigo with concentrated sulphuric acid at 160°C. The di- and tetra-sulphoindigo side products formed during the reaction were removed by preparative HPLC to yield a product of high chromatographic purity. The trisulphoindigo content of the food dye FD & C Blue No. 2 and the purity of commercially available trisulphoindigo were determined by HPLC analysis. 相似文献
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This work describes the application of a hybrid two-step enantioselective separation process. As a first step, pertraction using supported liquid membranes provides an initial enrichment, while the following preferential crystallization delivers the enantiopure crystals as final product. Mandelic acid in water was studied as a model system. Using a suitable chiral selector, pertraction provides enrichments exceeding 10% and reaching up to 20% in the permeate phase, which was sufficient to allow for subsequent selective preferential crystallization. Based on the individual performances of pertraction and crystallization, overall yields and productivities are estimated. The calculated productivities are compared with values achievable in alternatively applicable chromatographic separation processes using chiral stationary phases. The realized hybrid pertraction-crystallization process is in its present state for the example considered still inferior to preparative chromatography. Strategies for further improvement are suggested. 相似文献
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建立了反相高效液相色谱定量分析草酸二甲酯生产过程中的草酸二甲酯及草酸含量的方法。采用带有紫外检测器的Shimadzu LC-20A型高效液相色谱仪,C18色谱柱(4.6 mm×150 mm,5 μm),流动相是体积比为60:40的乙腈-磷酸水溶液(pH=2.7),流速为0.7 mL/min,柱温25 ℃,254 nm波长下紫外检测。探讨了pH值及其它条件对色谱分离的影响。该方法测得的草酸及草酸二甲酯线性回归曲线的相关系数分别为0.9996和0.9998,相对标准偏差为0.8%~1.0%,满足定量分析要求。 相似文献
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Kiyokatsu Jinno Shigeru Shimura John C. Fetzer Wilton R. Biggs 《Polycyclic Aromatic Compounds》2013,33(3):151-159
The chromatographic performance of dicoronylene as a stationary phase in microcolumn liquid chromatography has been investigated. The performance has been compared to commercially available polymeric and monomeric octadecylsilica stationary phases. Similarities between polymeric octadecylsilica phases and dicoronylene are found in their planarity recognition capability for polycyclic aromatic hydrocarbons. This is explained by the planar structure of dicoronylene being able to recognize planar solutes in the liquid chromatographic environment, as explained by the “slot model” as proposed by Wise et al. 相似文献
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以二乙烯基苯(DVB-55)和二乙二醇二甲基丙烯酸酯(DGD)为共聚单体,采用沉淀聚合法在乙腈溶剂中一步制得了聚(二乙烯基苯-co-二乙二醇二甲基丙烯酸酯)微球[P(DVB-DGD)]。用FTIR、SEM和BET等方法对P(DVB-DGD)进行表征,结果表明,两种单体在聚合过程中实现了共聚,数均粒径为3.6μm的单分散微球表面未见大孔结构,微球比表面积为2.9 m2/g,平均孔径为9.1 nm。以两组试样为探针分子,采用反相液相色谱模式考察了P(DVB-DGD)填充的新型固定相的色谱性能,结果显示,组分获得了尖锐对称的峰形。色谱柱呈现了较高柱效和良好色谱性能,表明沉淀聚合在HPLC固定相方面具有较好应用前景。 相似文献
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Subbareddy Mekapothula A. D. Dinga Wonanke Matthew A. Addicoat David J. Boocock John D. Wallis Gareth W. V. Cave 《International journal of molecular sciences》2021,22(11)
A silica-bound C-butylpyrogallol[4]arene chromatographic stationary phase was prepared and characterised by thermogravimetric analysis, scanning electron microscopy, NMR and mass spectrometry. The chromatographic performance was investigated by using C60 and C70 fullerenes in reverse phase mode via flash column and high-pressure liquid chromatography (HPLC). The resulting new stationary phase was observed to demonstrate size-selective molecular recognition as postulated from our in-silico studies. The silica-bound C-butylpyrogallol[4]arene flash and HPLC stationary phases were able to separate a C60- and C70-fullerene mixture more effectively than an RP-C18 stationary phase. The presence of toluene in the mobile phase plays a significant role in achieving symmetrical peaks in flash column chromatography. 相似文献