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An advanced method for the preparation of erucyl dimethyl amidopropyl betaine and acid solution properties / Hongsheng Lu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 445-450 Titre : An advanced method for the preparation of erucyl dimethyl amidopropyl betaine and acid solution properties Type de document : texte imprimé Auteurs : Hongsheng Lu, Auteur ; Xuan Zhang, Auteur ; Hongping Quan, Auteur ; Shanshan Dai, Auteur ; Tailang Zhang, Auteur ; Zhiyu Huang, Auteur Année de publication : 2012 Article en page(s) : p. 445-450 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Erucylamidopropyle bétaïne Surfactants Viscoélasticité Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : In this paper, an improved method for the preparation of erucyl dimethyl amidopropyl betaine (EDAB) was provided. The synthesis conditions were investigated. N,N-dimethyl-N’-erucyl-1,3-propylenediamine was synthesized by the reaction of erucic acid with N,N-dimethyl-1,3-propylenediamine at 170°C for 7 h, and then the intermediate was reacted with sodium chloroacetate in the mixture of methanol and water (3:7 v/v) at 60°C. The product was obtained after 6 h. The compounds were confirmed by IR and 1H-NMR. The properties of EDAB acid solution were also studied. The results indicated that viscosity of acid solution increased with decreasing hydrochloric acid concentration and was mainly controlled by surfactant concentration and temperature. The viscosity of an acid solution was maximum when the concentration of hydrochloric acid was at 15 wt%. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Synthesis routes of EDAB - Synthesis of N,N-dimethylerucylamine - Synthesis of N,N-dimethylerucylamine hydrochloride - Synthesis of EDAB - Viscosity measurement of viscoelastic surfactant acid solution - RESULTS AND DISCUSSION : Effect of reaction temperature - Effect of reaction materials Ratio - Effect of alcohol-water system - Effect of temperature and time on quanterization reaction - Effect of temperature on live acid viscosity - Effect of EDAB concentration on live acid viscosity - Effect of hydrochloric acid concentration of viscosity of acid solution - Effect of temperature on viscosity of acid solution DOI : 10.3139/113.110215 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16530 [article]

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Development and validation of micellar-enhanced spectrofluorimetric method for determination of sulpiride in pharmaceutical formulations and biological samples / Jasmin Shah in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 451-457 Titre : Development and validation of micellar-enhanced spectrofluorimetric method for determination of sulpiride in pharmaceutical formulations and biological samples Type de document : texte imprimé Auteurs : Jasmin Shah, Auteur ; Muhammad Rasul Jan, Auteur ; Muhammad Naeem Khan, Auteur ; Inayatullah, Auteur Année de publication : 2012 Article en page(s) : p. 451-457 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dodécyl sulfate de sodium Le laurylsulfate de sodium (LSS) ou dodécylsulfate de sodium (SDS) est un détergent et tensioactif ionique fort, couramment utilisé en biochimie et biologie moléculaire. C'est un composé à ne pas confondre avec le laureth sulfate de sodium. La concentration micellaire critique du SDS varie de 0,007 à 0,01 mol/L dans l'eau à 25°C. Le dodécylsulfate de sodium (en anglais, Sodium Dodecyl Sulfate ou SDS ou/ NaDS), de formule C12H25NaO4S, aussi connu sous le nom de laurylsulfate de sodium (en anglais, sodium lauryl sulfate ou SLS), est un tensioactif ionique qui est utilisé dans les produits ménagers tels que les dentifrices, shampooings, mousses à raser ou encore bains moussants pour ses effets épaississants et sa capacité à créer une mousse, il est également repris comme additif alimentaire par le codex alimentarius (E487). La molécule est composée d’une chaîne de 12 atomes de carbone, rattachée à un groupement sulfate conférant à la molécule les propriétés amphiphiles requises pour un détergent. Le SDS est préparé par sulfonation du dodécanol (alcool de lauryl, C12H25OH), suivie par une neutralisation par du carbonate de sodium. Le SDS est utilisé aussi bien dans les procédés industriels que pour les produits cosmétiques destinés au grand public. Formulation (Génie chimique) Médicaments Micelles Préparations pharmaceutiques Spectroscopie de fluorescence Sulpiride Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Sensitive and simple spectrofluorometric method has been developed and validated for the quantification of sulpiride in pure, commercial formulations, human plasma and urine in the presence of sodium dodecyl sulphate (SDS) surfactant micelle. The experimental parameters like buffer, surfactant type and volume were studied. A linear relationship was found between sulpiride concentration and fluorescence intensity in the range of 0.02 µg mL–1–7.0 µg mL–1 containing 0.2 M sodium dodecyl sulphate with ?ex 292 nm and ?em 343 nm with a correlation coefficient of 0.9987. The limit of detection (LOD) and limit of quantification (LOQ) was found to be 1.9 × 10–2 µg mL–1 and 5.9 × 10–2 µg mL–1 respectively. The proposed method was successfully applied for the determination of sulphiride in pure and dosage form; the percentage recoveries agreed well with the label value. The effect of common excipients used as additive in pharmaceutical formulations was studied and no interferences was found. Similarly the effect of some common cations and compounds present in urine and plasma were also investigated and the method was found free of interferences. The method was further extended to the in-vitro determination of sulphiride in spiked human plasma and urine samples with percentage recoveries from 98.33%–99.75% and 95.67%–101.67% respectively. The results of the proposed method have been compared with the literature HPLC method and no significant difference was found between them. Note de contenu : - EXPERIMENTAL : Instruments - Material and reagents - Preparation of reagent solutions - Preparation of standard solution - General procedure for preparation of calibration curve - Application to pharmaceutical formulation - Application to spiked human urine and plasma samples - RESULTS : Special characteristics - Effect of surfactants type - Effect of pH and buffers - Effect of order of reagents addition - Effect of interferences - DISCUSSION : Analytical parameters - Precision and accuracy - Applicability of the proposed method DOI : 10.3139/113.110216 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16531 [article]

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Influence of heat treatment on the performance of polymers as gypsum (CaSO4 · 2H2O) scale inhibitors for industrial water applications / Zahid Amjad in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 458-465 Titre : Influence of heat treatment on the performance of polymers as gypsum (CaSO4 · 2H2O) scale inhibitors for industrial water applications Type de document : texte imprimé Auteurs : Zahid Amjad, Auteur Année de publication : 2012 Article en page(s) : p. 458-465 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Gypse Inhibiteurs (chimie) Morphologie (matériaux) Polymères Structure cristalline (solide) Traitement thermique Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The inhibition of gypsum precipitation by homo-, co-, and terpolymers has been examined in aqueous solution. It has been found that polymer performance as gypsum inhibitor depends upon polymer composition, type of comonomer, and functional groups. Results on the evaluation of polymers suggest that compared to co- and terpolymers, homopolymers containing carboxyl group are effective gypsum inhibitors. The impact of heat treatment (150°C to 240°C) on the performance of various homo-, co-, and teropolymers as gypsum inhibitors has also been investigated. It has been observed that all polymers lose performance to a varying degree when exposed to thermal treatment. Performance data on co- and terpolymers containing amido group show improved performance after heat treatment suggesting the formation of carboxyl group. Scanning electron microscopic investigations of gypsum crystals grown in the presence of polymers show that structures of these crystals are highly modified. DOI : 10.3139/113.110217 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16532 [article]

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Adsorption kinetics of cu(II) from aqueous solution by low cost chemically modified saw dust of morus alba / Sultan Alam in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 466-471 Titre : Adsorption kinetics of cu(II) from aqueous solution by low cost chemically modified saw dust of morus alba Type de document : texte imprimé Auteurs : Sultan Alam, Auteur ; Azmat Ullah, Auteur ; Noor-ul-Amin, Auteur ; Najeeb-ur-Rehman, Auteur Année de publication : 2012 Article en page(s) : p. 466-471 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Cinétique chimique Diffractométrie de rayons X Fourier, Spectroscopie infrarouge à transformée de Potentiel zeta Sciure de bois Solutions aqueuses (chimie) Spectrométrie à énergie dispersive Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Adsorption kinetics of Cu(II) from aqueous solution by low cost chemically modified saw dust of Morus alba was investigated. The samples were characterized by FT-IR, EDS, BET surface area and Zeta potential technique. The surfaces contain carbonyl and hydroxyl functional groups which act as a binding sites for Cu(II) ion. Adsorption kinetics of Cu(II) was tested by first order kinetics, Elovich and parabolic diffusion kinetic equations which shows that adsorption is a diffusion controlled process. The rate of adsorption was high at high adsorption temperature. Thermodynamic parameters like ΔH°, ΔS° and ΔG° were calculated from the kinetic data. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16533 [article]

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Immobilized micro-organism in mesoporous activated carbon for treatment of tannery waste water in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 472-480 Titre : Immobilized micro-organism in mesoporous activated carbon for treatment of tannery waste water Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 472-480 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charbon actif Eaux usées -- Recyclage Matériaux mésoporeux Recyclage (déchets, etc.) Tannage Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Chemo-Autotrophic Activated Carbon Oxidation (CAACO) system was used for the treatment of tannery waste water. It employs activated carbon-immobilised sulphate reducing bacteria for the removal of dissolved organics in wastewater under oxidizing environment. The wastewater characteristics such as COD (1689 mg/L), BOD (377 mg/L), sulphate (915 mg/L) and sulphide (184 mg/L) were applied at an hydraulic loading rate of 0.7376 m3/m3/day and surface loading rate of 0.2438 m3/m2/day to CAACO reactor at 30°C and at atmospheric pressure. The removal of COD, BOD, sulphide and sulphate was 87%, 96%, 100% and 40% respectively after 2 hours of oxidation. The oxidation of dissolved organics in wastewater was accomplished by passing air at flow rate 3 L/min and at pressure 0.5 kg/cm2 through CAACO reactor. The effect of variables COD loading, O2/COD, O2/(COD-BODL), COD/S2–, (COD-BODL)/S2– and [(COD-BODL)i–(COD-BODL)e]/S2– on rate and percentage removal of COD from tannery wastewater was determined. Note de contenu : - MATERIALS AND METHODS : Source of raw wastewater - Primary clarification - Anaerobic digester and sand filtration - Upflow anaerobic filter (UAF) - Sand filter - Chemo autotrophic activated carbon oxidation (CAACO) reactor - Isolation and identification of bacterial species - Immobilisation of the isolated species - RESULTS AND DISCUSSION : Characteristics of wastewater - Upflow anaerobic reactor - Chemo autotrophic activated carbon oxidation (CAACO) reactor DOI : 10.3139/113.110219 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16534 [article]

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Kinetic studies of glutamic acid oxidation by hexavalent chromium in presence of surfactants / Ankita Basu in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 481-487 Titre : Kinetic studies of glutamic acid oxidation by hexavalent chromium in presence of surfactants Type de document : texte imprimé Auteurs : Ankita Basu, Auteur ; Sumanta K. Ghosh, Auteur ; Saha Rumpa, Auteur ; Aniruddha Ghosh, Auteur ; Tuhin Ghosh, Auteur ; Kakali Mukherjee, Auteur ; Subhendu Sekhar Bhattacharyya, Auteur ; Bidyut Saha, Auteur Année de publication : 2012 Article en page(s) : p. 481-487 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome hexavalent Cinétique chimique Glutamique, Acide L'acide glutamique ou glutamate (la forme anionique de l'acide glutamique) est l'un des 20 acides-α-aminés naturels constituant les protéines. Sa chaîne latérale contient un résidu carboxyle, ce qui en fait un acide aminé « acide », dicarboxylique, polaire. Oxydation Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Hexavalent chromium is a widespread environmental contaminant and a known human carcinogen. It is a very important to remove toxic Cr(VI) from industrial waste water. In human body Cr(VI) is reduced to Cr(III). Effective bio-molecule present in body contains a number of different functional groups. Kinetics of reduction of Cr(VI) by an important amino acid, glutamic acid in micellar media have been studied spectrophotometrically. Micellar media is a testing enviroment to establish the mechanistic paths of reduction of Cr(VI) to Cr(III). The catalyst and suitable surfactants enhance the reduction of Cr(VI). Note de contenu : - EXPERIMENTAL AND METHODS : Procedure and kinetics measurements - Product analysis - RESULTS AND DISCUSSION : Dependence of [bipy]y - Dependence on the substrate [glutamic acid]T - Dependence on [H+] - Effect of surfactants - Evidence for the formation of free radicals - MECHANISM AND INTERPRETATION Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16535 [article]

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Mixed micelles containing sodium laurate : effect of chain length, polar head group, and added salt / Rie Kakehashi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 488-493 Titre : Mixed micelles containing sodium laurate : effect of chain length, polar head group, and added salt Type de document : texte imprimé Auteurs : Rie Kakehashi, Auteur ; Motohiro Shizuma, Auteur ; Shingo Yamamura, Auteur Année de publication : 2012 Article en page(s) : p. 488-493 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Laurate  sodium'  'Paramètre  interaction'  'Système  surfactant  mixte'  Alkylglycoside  'Oxyde  alkyldiméthylamine' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : We studied the mixing behavior of binary mixtures of alkylglycosides (CnGly); i.e. n-Octyl ?-D-glucopyranoside, n-Decyl ?-D-glucopyranoside and n-Decyl ?-D-maltoside in combination with sodium laurate (NaL), and N,N-dimethyldodecylamine oxide in combination with NaL. The critical micelle concentration (CMC) data were obtained as functions of the composition based on equilibrium surface tension measurements. The cmc values with and without the addition of salt systems were then analyzed according to the regular solution model developed by Rubingh for mixed micelles. For the added salt systems, we applied Maeda’s formulation for ionic/nonionic mixed micelles. For NaL/CnGly mixed systems, an increase in the hydrophilicity of the polar head group of CnGly resulted in a strong interaction between NaL and CnGly. In addition, introducing ionic species to the added salt systems stabilized the nonionic micelles. Note de contenu : - NaL/CnGly and NaL/C12 DMAO mixtures in 5 mM NaOH - NaL/CnGly and NaL/C12 DMAO mixtures with O.1 M NaCl in 5mM NaOH - Dynamic surface tension behavior of NaL Mixture in 5mM NaOH DOI : 10.3139/113.110220 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16536 [article]

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Investigating of synthesis parameters, kinetics and pilot plant of sodium sarcosinate / Masoumeh Hassanzadeh in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 494-497 Titre : Investigating of synthesis parameters, kinetics and pilot plant of sodium sarcosinate Type de document : texte imprimé Auteurs : Masoumeh Hassanzadeh, Auteur ; Masoud Kambarani, Auteur ; Reza Saghafi, Auteur ; Hedieh Dezfouli, Auteur Année de publication : 2012 Article en page(s) : p. 494-497 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : 'Surfactant  anionique'  'Dérivé  glycine'  'Réaction  amidation' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Sodium sarcosinate, an anionic surfactant, is known as a methylated glycine derivative, that is synthesized in a one-step amidation reaction. In this work, to find out the best conditions, several experiments carried out. So, the highest yield was obtained at (30±3) °C, by gradual addition of sodium monochloro acetate to methylamine solution. The total reaction time is 6 hours. Based on data, and the plots of kinetics of the reaction, a second-order reaction equation was suggested for this synthesis reaction. The rate constant (?), and the regression coefficient (R2) were found as 0.0085 and 0.0934, respectively, which were in the best agreement with second-order reactions. According to the results, these data were applied for scale up laboratory to pilot phase. In addition, an industrial plant was suggested and designed. Note de contenu : - DISCUSSION : Influence of molar ratio of methylamine to sodium monochloro acetate - Influence of temperature - Influence of time - Influence of addition condition - Removing excess amine - KINETICS - SCALE-UP EXPERIMENTAL DATA TO PILOT PLANT DOI : 10.3139/113.110222 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16537 [article]

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Synthesis and surface properties of CO2H type gemini surfactant having semifluoroalkyl group as hydrophobic group / Tokuzo Kawase in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 498-507 Titre : Synthesis and surface properties of CO2H type gemini surfactant having semifluoroalkyl group as hydrophobic group Type de document : texte imprimé Auteurs : Tokuzo Kawase, Auteur ; Tomoyuki Ankyu, Auteur ; Tatsuo Oida, Auteur Année de publication : 2012 Article en page(s) : p. 498-507 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Novel CO2H type gemini surfactants having semifluoroalkyl group (Rf-(CH2)n-: Rf = C4F9, C6F13, C8F17 and n = 2, 3) as hydrophobic group were successfully synthesized and their surface properties were studied. (Perfluoroalkyl)ethylmalonic esters were synthesized by the reaction of malonic ester with Rf(CH2)2I using NaH as base in THF/DMF. (Perfluoroalkyl)propylmalonic esters were synthesized from allylmalonic ester, namely by the radical addition of Rf-I using AIBN as initiator, and reduction with Zn/AcOH. Those fluoroalkylated malonic esters were connected using Br(CH2)sBr (s = 3, 4) to give dimeric tetraesters. Then, tetraesters were hydrolyzed using KOH/EtOH followed by decarboxylation in AcOH to afford CO2H type gemini surfactants. To study their surface properties, both surface tension-concentration and surface pressure-area isotherms were measured. As expected, COOH geminis showed one order of magnitude lower critical micellar concentrations (CMC) than that of conventional 1+1 type surfactant. In the surface pressure-area measurements, as length of fluoroalkyl increased, lift-off area (AL) decreased, monolayers were clearly formed upon compression and the limited areas (A?) for C6F13 and C8F17 were smaller than twice of that of C8F17(CH2)2COOH. Especially, COOH geminis having Rf = C8F17 and -(CH2)3- spacer showed the formation of solid phase monolayers, and the planar five membered ring-like structure was proposed. Note de contenu : - EXPERIMENTAL : Materials and instruments - Synthesis of COOH type gemini - Measurements - RESULTS AND DISCUSSION : Synthesis of fluoroalkylmalonic ester - Surface properties of COOH type gemini DOI : 10.3139/113.110223 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16538 [article]

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