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1.
Passapan Peungjitton Polkit Sangvanich Surachai Pornpakakul Amorn Petsom Sophon Roengsumran 《Journal of surfactants and detergents》2009,12(2):85-89
Sodium cardanol sulfonate surfactant was synthesized from cardanol from cashew nut shell liquid. Surfactant properties of
cardanol sulfonate were determined and compared with dodecylbenzene sulfonate. Surface tension values were determined to be
32.25 mN/m for cardanol sulfonate at 20% w/v and 28.00 mN/m for dodecylbenzene sulfonate at 15% w/v. Critical micelle concentrations
of dodecylbenzene sulfonate and cardanol sulfonate were found to be 0.435 and 0.372 mol/L, respectively. In comparison with
dodecylbenzene sulfonate, the relative detergency of cardanol sulfonate was calculated to be 93.7% compared to dodecylbenzene
sulfonate. Results suggest that cardanol sulfonate can be used as alternative anionic surfactant.
相似文献
Sophon RoengsumranEmail: |
2.
New stable silayl cationic surfactants have been studied for the destruction of toxic organophosphorus pesticides. Hexadecyl,
dodecyl trimethyl silane ammonium chloride or iodide surfactants were synthesized and evaluated in the degradation of pesticides
such as Diazinon, Malathion or Chlorpyrifos. The hydrolytic efficiency of each surfactant was tested by measuring the kinetics
of model substrates cleavage under a pseudo-first order reaction. The iodo silayl based surfactants showed more destructive
power than the chloro derivatives. Meanwhile, the hexadecyl moiety showed more effective pesticide degradation than the corresponding
dodecyl moiety.
相似文献
Abdelfattah M. Badawi (Corresponding author)Email: |
Sahar M. AhmedEmail: |
3.
The properties of surfactin-C16 aqueous solution in the presence of Na+ ions, produced by Bacillus subtilis, were studied by the fluorescence method. The critical micelle concentration (CMC) of surfactin-C16 was measured as 24.7 μM in 0.05 M Tris buffer (pH 8.5–8.6). With an increase in Na+ concentration, the CMC value and micropolarity of surfactin-C16 decreased while the microviscosity increased, which means that the addition of Na+ improves the surface activity and enhances the micellization of the surfactin-C16 in solution. The preliminary aggregation number (N) was obtained by the steady-state fluorescence method.
相似文献
Bo-Zhong MuEmail: |
4.
The interaction of SDS/SDBS in aqueous gelatin solutions is studied above the gelation temperature by viscosity and circular
dichroism (CD) measurements. The steep rise observed in the relative viscosity can be due the structural transitions leading
to micellar growth of higher order. Circular dichroism spectra indicated that gelatin helped in inducing the sphere→rod transition,
without suffering any conformational changes within it. The findings are particularly significant in terms of the head group
contribution, hydrophobic interaction and the formation of formulated complexes.
相似文献
Lisa SreejithEmail: |
5.
Brahim Bettayeb Caroline Descôteaux François Benoit Camille Chapados Gervais Bérubé 《Journal of surfactants and detergents》2009,12(3):237-247
Fourteen pure β-aminopropionic acid amphoteric surfactants were synthesized from methyl acrylate using primary amines. The
synthesis was done in two steps. First, Michael addition of a primary amine to methyl acrylate gave two separable addition
products. Second, because the resulting esters gave, by the classical saponification procedure, undesired retro-Michael products,
they were treated with sodium trimethylsilanolate to give the corresponding pure anhydrous acid salt under mild non-aqueous
reaction conditions. Two types of amphoteric surfactants were obtained: the monocarboxylate and the dicarboxylate series.
The pure surfactants were characterized by IR, 1H NMR, and 13C NMR spectroscopy. The surfactant critical micelle concentrations were evaluated. From these the Gibbs free energy of micellizations
[∆G(–CH2–)mic] were calculated. These are related to the methylene units that contribute an average of −1.0 (±0.3) kJ mol−1 for both the monocarboxylate and the dicarboxylate series.
相似文献
Gervais BérubéEmail: |
6.
Linear alkylbenzene sulfonate (LAS) an ingredient of many household and industrial detergents can reach the environment after
disposal of raw sewage. Its correct detection and quantification in different environmental samples is a critical issue for
evaluating its environmental fate. This paper outlines a validation of an entire analytical procedure of LAS in environmental
samples, including extraction, pre-concentration and HPLC detection and quantification with fluorescence detection.
相似文献
C. BengoecheaEmail: Email: |
7.
Gargi Basu Ray Soumen Ghosh Satya P. Moulik 《Journal of surfactants and detergents》2009,12(2):131-143
Sodium N-dodecanoyl sarcosinate (SDDS), a novel amino-acid based surfactant, has immense biological and industrial importance. Although
it is being used in a number of cosmetic formulations, systematic analysis of the bulk and interfacial properties of the surfactant
is scarce in the literature. In this study, effects of salt, temperature, and pH on the self-association and related properties
of SDDS have been examined in detail using methods such as tensiometry, conductometry, fluorimetry, pH-metry, spectrophotometry,
calorimetry, and circular dichroism. The nature of amphiphilic packing and the aggregation numbers of the assemblies have
been deciphered. Properties of the acid form of the surfactant have also been explored. The results have been conceptually
rationalized and systematically presented together with associated energetics of the interfacial adsorption and self-aggregation
of the surfactant in the bulk.
相似文献
Satya P. MoulikEmail: Email: |
8.
Characterization and Surfactant-Enhanced Washing Treatability of Drilling Fluids Stored for More than 20 Years 总被引:1,自引:0,他引:1
Luis C. Fernandez Hector Zegarra Gustavo Baca Luis G. Torres 《Journal of surfactants and detergents》2008,11(4):307-314
Drilling fluids represent a significant environmental hazard owing to the fact that they are frequently stored in open vessels
without any treatment. The drilling fluids studied in this work have been stored for 20–30 years in open cesspits in the state
of Tabasco (Mexico). The aim of this work was to characterize the drilling fluids produced in this region and to determine
their treatability by means of surfactant-enhanced washing. Two anionic and two non-ionic surfactants (sodium lauryl ethersulfate
SLES and sodium dodecylsulfate SDS, ethoxylated nonylphenol ENP and an unknown composition ethoxylated nonionic Surfynol 440
respectively) were employed for surfactant-enhanced washing assessments in the presence of a commercial dispersant. Drilling
fluids were contaminated with 135,400 mg of total petroleum hydrocarbons (TPH)/kg soil, including seven polycyclic aromatic
hydrocarbons (PAHs) from 1.18 to 57.28 mg/kg. TPH removal efficiencies as high as 55.7% were reached when washing drilling
fluids with SDS (4%), followed by ENP 906 (1%), which showed a TPH removal of 52.2%, and ENP itself at a lower dose (0.1%).
SLES and S440 gave removal of around 10–15% with the assessed doses.
相似文献
Luis G. TorresEmail: |
9.
Mohammadreza Khanmohammadi Mohammadjavad Hosseinnia Kojidi Amir Bagheri Garmarudi Ahmad Ashuri Majid Soleymani 《Journal of surfactants and detergents》2009,12(1):37-41
An analytical procedure was developed to monitor the batch reaction of coconut oil and diethanolamine which also would determine
the cocodiethanolamide (CDEA) content of the final product. The method was based on attenuated total reflectance Fourier transform
infrared spectrometry utilizing partial least squares regression. The calibration was modeled in the 1,781–1,714 and 1,658–1,639 cm−1 spectral regions for coconut oil and CDEA respectively. The models were then applied to predict the amidation process yield
and to monitor the in situ kinetics of reactions between coconut oil and DEA. The root mean square error of prediction was
0.590 and 0.336 for coconut oil and CDEA respectively. The proposed method can also be successfully applied to the determination
of purity in commercial grade CDEA samples and would give reliable results in comparison with the potentiometric titration
reference method.
相似文献
Mohammadreza KhanmohammadiEmail: |
10.
Synthesis and Physicochemical Investigation of Long Alkylchain Betaine Zwitterionic Surfactant 总被引:1,自引:0,他引:1
Liyun Qi Yun Fang Zeyun Wang Na Ma Liangyu Jiang Yiyou Wang 《Journal of surfactants and detergents》2008,11(1):55-59
An effective and economic two-step route was developed to synthesize the long alkyl chain betaine zwitterionic surfactant
directly from natural fatty acids. The optimal processing conditions for synthesizing the intermediate and final product were
probed and the yields of 96.4% and 88.3% were obtained for each step, respectively. The surface active behavior of the synthesized
decylbetaine surfactant was investigated using the surface tension method. The related thermodynamic parameters were calculated
and discussed. The fluorescence probe technology was applied to determine the micropolarity of decylbetaine micelles.
相似文献
Yun Fang (Corresponding author)Email: |
11.
Daisuke Saio Toru Amaya Toshikazu Hirao 《Journal of Inorganic and Organometallic Polymers and Materials》2009,19(1):79-84
Polyaniline/Pd nanoparticles were synthesized via ligand exchange. Pre-prepared water soluble starch/Pd nanoparticles were
treated with polyaniline, and washed with water, leading to the small and well-dispersed polyaniline/Pd nanoparticles. The
redox state of polyaniline was preserved during the ligand exchange reaction.
相似文献
Toshikazu HiraoEmail: |
12.
M. M. A. El-Sukkary Nagla A. Syed Ismail Aiad W. I. M. El-Azab 《Journal of surfactants and detergents》2008,11(2):129-137
Alkyl polyglycosides (APGs) of different hydrocarbon chain lengths were prepared using an indirect method involving the condensation
of fatty alcohol with dextrose. The chemical structures of the prepared compounds were confirmed using different spectroscopic
techniques, primarily Fourier transform infrared spectroscopy, nuclear magnetic resonance and mass spectroscopy. The surface
properties of the solutions containing different concentrations of the prepared APGs were determined at different temperatures.
The results of the spectroscopic analysis demonstrate that these materials were prepared through the correct techniques, producing
pure materials. The results of the critical micelle concentration (CMC) determination demonstrate that the surface properties
of these compounds depend mainly on the nature of their hydrophobic component.
相似文献
Ismail AiadEmail: |
13.
In this research, polyester fabrics were treated with three concentrations (10, 20 and 30 g/L) of macro- and microemulsions
of silicones in water at 30 °C by the padding method. The treated fabrics were then dried/cured at 130 °C for 40 s. Some of
the physical and chemical properties of the samples are discussed. The drapeability of treated samples was lower and found
to depend on the silicone particle size. Moisture absorbency of treated samples was also lower. Colorimetric properties of
softener treated fabrics were evaluated with a reflectance spectrophotometer. Scanning electron microscope (SEM) examinations
showed an aggregation of silicone particles on the fiber surface.
相似文献
Mazeyar ParvinzadehEmail: |
14.
Yurong Jiang Zhigang Xu Jimei Luan Pingqin Liu Weihong Qiao Zongshi Li 《Journal of surfactants and detergents》2007,10(3):131-136
Three unsymmetrical bolaform surfactants with different aromatic rings and a ω-carboxyalkyl chain were synthesized and their
molecular structures were characterized by ESI–MS and 1H NMR. The percentages of conversion of alkylation were judged by the iodine value measurements and the effect of reaction
temperature on sulfonate content of synthesized products has also been discussed.
相似文献
Yurong JiangEmail: |
15.
Parichat Tanthakit Ampika Nakrachata-Amorn John F. Scamehorn David A. Sabatini Chantra Tongcumpou Sumaeth Chavadej 《Journal of surfactants and detergents》2009,12(2):173-183
In this study, the impact of water hardness and builder on the phase diagrams of motor oil microemulsions and the detergency
of oil removal from a polyester/cotton blend was investigated. Water hardness and builder were found to have insignificant
effects on the microemulsion phase diagram with motor oil. A mixed surfactant system of two parts C14–15(PO)3SO4Na, and 98 parts C12–14H25–29O(EO)5H of the total actives at 4% salinity was used to study the effect of water hardness and builders sodium tripolyphosphate
(STPP) or ethylenediaminetetraacetic acid (EDTA) on detergency at 30 °C at a total active concentration of 0.3%. This formulation
is in the Winsor Type III microemulsion regime. The microemulsion-based formulation resulted in better detergency than a leading
commercial liquid laundry detergent at all concentrations up to 0.5% actives. The microemulsion-based formulation showed a
plateau in detergency at >80% oil removal above 0.1% actives. The total oil removal decreased with increasing water hardness
while the interfacial tension increased. When hard water was used in laundering, the total oil removal improved with increasing
concentrations of STPP or EDTA up to stoichiometric levels, with STPP being slightly more effective than EDTA on a molar basis.
Even high builder concentration could not improve hard water detergency to that of soft water. A significant fraction of oil
removal occurred in the rinse steps vs. the wash step. Increasing water hardness reduced this fractional oil removal in the
rinse steps, but it was still over half of total oil removal at 1,000 ppm water hardness.
相似文献
Sumaeth ChavadejEmail: Email: |
16.
I. Bozetine T. Ahmed Zaïd C. E. Chitour J. P. Canselier 《Journal of surfactants and detergents》2008,11(4):299-305
The aim of this work was to formulate and optimize the washing performance of an alkylpolyglucoside-based dishwashing detergent.
The liquid detergent was formulated with five ingredients of commercial origin: anionic (linear sodium alkylbenzenesulfonate
and sodium laurylethersulfate), nonionic (C12–C14 alkylpolyglucoside) and zwitterionic (a fatty acid amide derivative with a betaine structure) surfactants, and NaCl for viscosity
control. In addition to the plate test, other properties were investigated including “cloud point”, viscosity, and emulsion
stability. Statistical analysis software was used to generate a central composite experimental design. Then, a second order
design and analysis of experiments approach, known as the Response Surface Methodology, was set up to investigate the effects
of the five components of the formulation on the studied properties in the region covering plausible component ranges. The
method proved to be efficient for locating the domains of concentrations where the desired properties were met.
相似文献
J. P. CanselierEmail: |
17.
Mixtures of sodium dioctylsulfosuccinate (AOT) and sodium dodecylsulfate (SDS) that were studied in water at 25 °C by using
surface tension, conductance, emf and fluorescence emission methods exhibit synergism in the region where the mole fraction
of AOT in the bulk solution (α
1) is less than 0.7 and ideality in the region where α
1 ≥ 0.7. The molal conductance versus the concentration behavior of an aqueous solution of AOT is found to be different from
that of other ionic surfactants with the exception of bile salts. Composition of the mixed micelle was evaluated and discussed
using the Rubingh’s and the Rodenas–Valiente–Villafruela (RVV) treatments. The values of the counter ion binding constant
determined from the emf data show that the counter ion binding behavior of the mixed micelle is controlled entirely by AOT.
The free energy for mixed micelle formation was calculated using a modified equation. The aggregation number determined by
the fluorescence quenching method indicated that in the mixed micelle, as α
1 increases, the number of molecules of AOT remains constant and that of SDS decreases. Characteristics of the adsorption layer
of the mixed surfactant system were also examined using the theoretical treatment of Rosen and Hua.
相似文献
K. IsmailEmail: |
18.
The effect of the different binary aqueous organic solvents viz. 1,4-dioxane, acetonitrile, dimethylsulfoxide, ethylene glycol,
and methanol, on the micelle formation and thermodynamics of a cationic surfactant cetyl triphenyl phosphonium bromide has
been studied conductometrically at 298–318 K. From the conductivity data critical micelle concentration, degree of counter
ion dissociation (α) and thermodynamic parameters of micellization have been determined. It is observed that micellization
tendency of the surfactant decreases in the presence of binary aqueous solvents. The entropies of micellization are all positive,
and they compensate the enthalpies of the process.
相似文献
Kallol K. GhoshEmail: |
19.
Synthesis of nano crystalline zeolite Y from bentonite 总被引:1,自引:0,他引:1
Zeolite Y was synthesized from bentonite via the hydrothermal method. The effects of various parameters on the synthesis were
investigated. The samples were characterized by XRD, XRF, IR, DTG and wet chemical analysis. The results show that crystallization
temperature, aging time and concentration of sodium hydroxide play important roles in the formation of the zeolite. P zeolite
was the competitive phase and present in most of the products. However, under optimized conditions, such as crystallization
temperature (97 °C), aging time (20 h), concentration of NaOH (3N), pure zeolite Y with high crystallinity was synthesized.
The results showed that optimization of the process results in a commercial route to synthesis zeolite Y from bentonite.
相似文献
N. GodazandehaEmail: |
20.
This paper describes an efficient method for the synthesis of long chain dialkyldiamido imidazolines by the reaction of diethylenetriamine
and several fatty acids under non-solvent microwave irradiation using calcium oxide as support This synthesis required much
less time in comparison to conventional thermal condensation and is carried out in an open vessel and the products obtained
by this method were found to be in good yields and of high purity. Fatty imidazolines were then quaternized by using dimethyl
sulfate as a quaternizing agent and isopropanol as a solvent, to produce cationic imidazolinium salts which were evaluated
for yield and cationic content. The instrumental techniques, viz. FT-IR and 1H NMR verified the formation of imidazolines and its subsequent quaternization. This method produced imidazolines in the very
low time of 5–10 min and gave a yield of 89–91% as compared to a very long time of 8–10 h and a lower yield of 75–80% by the
conventional thermal condensation method.
相似文献
Divya BajpaiEmail: Email: |