Relevant bibliographies by topics / Cetyltrimethylammonium bromide

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Cetyltrimethylammonium bromide'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 June 2025

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Journal articles on the topic "Cetyltrimethylammonium bromide"

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Jha, Kabita, Ajaya Bhattarai, and Sujeet Kumar Chatterjee. "Surface Tension Studies on the Micellization of Cetyltrimethylammonium Bromide in Presence and Absence of KCL and NaCl in Aqueous Media at Room Temperature." BIBECHANA 10 (December 12, 2013): 52–57. http://dx.doi.org/10.3126/bibechana.v10i0.9311.

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NOTE: on 27th May 2014 in the abstract, the sentence"The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media" was changed to read "The surface tension of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media."In the Conclusion (p.56) the sentence"The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media." was changed to read"The surface tension of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media." Precise measurements on Surface tension of cetyltrimethylammonium bromide in presence and in absence of KCl and NaCl in aqueous media are reported. The results showed a sharp decrease in surface tension with increase in concentration of cetyltrimethylammonium bromide and then almost constant value of surface tension was observed. Also, the surface tension decreases with addition of salts. The surface tension of cetyltrimethylammonium bromide is found less in presence of KCl than NaCl in aqueous media. In presence of monovalent salts, the critical micelle concentration (cmc) value decreases which is explained on the basis of the orientation of the surfactant and reduction of the free energy of the surface, thus decreasing surface tension. The graphs of surface tension versus concentration are used in determining the critical micelle concentration (cmc). BIBECHANA 10 (2014) 52-57 DOI: http://dx.doi.org/10.3126/bibechana.v10i0.9311
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Manojlovic, Jelena. "The Krafft temperature of surfactant solutions." Thermal Science 16, suppl. 2 (2012): 631–40. http://dx.doi.org/10.2298/tsci120427197m.

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Our main motivation to revisit the solution properties of cetyltrimethylammonium bromide is related to the clear requirement for better control of the adsorption parameters to form uniform self-assembled monolayers on muscovite mica substrates. To readily monitor the temporal evolution of structural details in cetyltrimethylammonium bromide solutions, we realized a rather simple conductivity experiment. Conductivity measurements were carried out as a function of temperature, to look closer into the Krafft temperature behavior of this surfactant. We measured the electrical conductivity of different concentrations of aqueous cetyltrimethylammonium bromide solutions, below and above the critical micells concentration.
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Bashpa, P., and K. Bijudas. "Green synthesis of benzaldehydes by the selective oxidation o benzyl alcohols using hexacyanoferrate (III) and bromate under phase transfer catalysis." Research Journal of Chemistry and Environment 26, no. 1 (2021): 28–33. http://dx.doi.org/10.25303/2601rjce2833.

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The selective oxidation of benzyl alcohols and substituted benzyl alcohols was carried out in greener solvents like ethyl acetate and toluene by hexacyanoferrate (III) and bromate ions under phase transfer catalysis. Various phase transfer catalysts like tetrabutylphosphonium bromide, tetrabutylammonium bromide, tetrabutylammonium hydrogen sulphate, cetyltrimethylammonium bromide and tricaprylmethylmmonium chloride were used. A pinch of sodium tungstate dihydrate is added as a co-catalyst when bromate is used an oxidant and hexacyanoferrate (III) is used in presence of mineral acids. The products obtained were precipitated as their 2,4- dinitrophenylhydrazone, purified, weighed and the yield was found to be > 90 %. The products were recrystallized in ethanol and analyzed by melting point and by various spectral techniques. It was proved that corresponding benzaldehydes were formed and there was no further oxidation to corresponding acids. All the catalysts were found effective in bringing out the reaction but based on yield and ease of reaction, the order of reactivity is tricaprylmethylammonium chloride > tetrabutylphosphonium bromide > tetrabutylammonium bromide > tetrabutylammonium hydrogen sulphate > cetyltrimethylammonium bromide. The selective oxidation of benzyl alcohols is very difficult to proceed in organic solvents without the aid of a phase transfer catalyst. Yield of products is found to be slightly more in ethyl acetate than that in toluene due to difference in polarity.
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Deýlová, Dana, Jiří Barek, and Vlastimil Vyskočil. "Voltammetric determination of 6-nitrobenzimidazole in the presence of surfactants." Collection of Czechoslovak Chemical Communications 76, no. 11 (2011): 1317–25. http://dx.doi.org/10.1135/cccc2011040.

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Determination of 6-nitrobenzimidazole by differential pulse voltammetry at a hanging mercury drop electrode, a polished silver solid amalgam electrode and a mercury meniscus modified silver solid amalgam electrode was studied in the presence of the surfactants Triton X-100, cetyltrimethylammonium bromide and sodium dodecyl sulfate. It was found that only cetyltrimethylammonium bromide at polished silver solid amalgam electrode increases the voltammetric signal. This fact was used for the determination of 6-nitrobenzimidazole in the concentration range from 1 × 10–7 to 1 × 10–4 mol l–1 by differential pulse voltammetry at polished silver solid amalgam electrode in the presence of cetyltrimethylammonium bromide (concentration 1 × 10–4 mol l–1).
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PRAUS, P. "Isotachophoretic separation of cetyltrimethylammonium bromide." Talanta 65, no. 1 (2005): 281–85. http://dx.doi.org/10.1016/j.talanta.2004.06.013.

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Abu-Hamdiyyah, Mohammad. "Amphiphilic coaggregation with cetyltrimethylammonium bromide." Journal of Physical Chemistry 90, no. 7 (1986): 1345–49. http://dx.doi.org/10.1021/j100398a027.

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Charbit, F. "Ultrafiltration of cetyltrimethylammonium bromide solutions." Journal of Membrane Science 133, no. 1 (1997): 1–13. http://dx.doi.org/10.1016/s0376-7388(97)82815-3.

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Hamdan, S., C. R. Laili, and K. Anuar. "MICELLAR SOLUTION OF TETRADECYLTRIMETHYLAMMONIUM BROMIDE/CETYLTRIMETHYLAMMONIUM BROMIDE MIXTURES." Journal of Dispersion Science and Technology 15, no. 1 (1994): 73–87. http://dx.doi.org/10.1080/01932699408943544.

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Jha, Kabita, Ajaya Bhattarai, and Sujeet Kumar Chatterjee. "Determination of critical micelle concentration of cetyltrimethylammonium bromide in presence and absence of KCl and NaCl in aqueous media at room temperature by viscosity measurement." BIBECHANA 11 (May 10, 2014): 131–35. http://dx.doi.org/10.3126/bibechana.v11i0.10392.

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NOTE: The correct reference list was added to this article on 08/07/2014.Viscosity measurement of cetyltrimethylammonium bromide in presence and in absence of KCl and NaCl in aqueous media is done. The results showed a sharp increase in viscosity with increase in concentration of cetyltrimethylammonium bromide. Also, the viscosity increases with addition of salts. The viscosity of cetyltrimethylammonium bromide is found more in presence of KCl than NaCl in aqueous media. In presence of monovalent salts, the critical micelle concentration (cmc) value decreases which is explained on the basis of nature and ionic strength of the added ion. The graphs of viscosity versus concentration are used in determining the critical micelle concentration (cmc). DOI: http://dx.doi.org/10.3126/bibechana.v11i0.10392BIBECHANA 11(1) (2014) 131-135
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Sriatun, Sriatun, Taslimah Taslimah, and Linda Suyati. "Synthesis of Zeolite from Sugarcane Bagasse Ash Using Cetyltrimethylammonium Bromide as Structure Directing Agent." Indonesian Journal of Chemistry 18, no. 1 (2018): 159. http://dx.doi.org/10.22146/ijc.22197.

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The purpose of this research is to synthesize zeolite from sugarcane bagasse ash using cetyltrimethylammonium bromide as structure directing agent. This research used cetyltrimethylammonium bromide surfactant to invent the high porosity, surface area, acidity and thermal stability of synthesized zeolite. The Silica was extracted by alkaline fusion using sodium hydroxide solution. The synthesis was conducted by hydrothermal process at 100 °C for 7 days, ageing process for 24 h and calcination at 500 °C for 5 h. The ratio of Si/Al (v/v) was 1, 15 and 25, meanwhile the concentration of cetyltrimethylammonium bromide was 5x10-4 M, 1x10-3 M and 1x10-2 M. The result showed all of product have strong absorbance at 950–1050 cm-1 and 620–690 cm-1, 420–460 cm-1, double ring at 520–570 cm-1, pore opening at 300–370 cm-1. Vibration of –OH as silanol group or water was indicated by broad absorbance at 3400–3450 cm-1. The diffractograms XRD showed that the product had high crystallinity. The composition of product on ratio Si/Al 1 with concentration of cetyltrimethylammonium 10-2 M is sodalite, the ratio Si/Al 15 and 25 are NaP1 and SiO2 quartz and contain 12.23% and 12.19% of Si, 4.17% and 13.18% of Al, respectively. Observation on SEM revealed that the crystal produced using cetyltrimethylammonium bromide were homogenous and regular in shape.
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Dissertations / Theses on the topic "Cetyltrimethylammonium bromide"

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Mills, Amanda Jayne. "Investigating cetyltrimethylammonium bromide (CTAB) reverse microemulsions using nuclear magnetic resonance." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6528/.

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This thesis investigates CTAB/alcohol/hexane/water reverse micelles, where the alcohol is butanol, pentanol, hexanol and heptanol, through the use of nuclear magnetic resonance (NMR). Diffusion and relaxation measurements showed the alcohol is distributed between the reverse micelle (RM) interface and the continuous phase, and exchanges between these two environments. The exchange of pentanol in the CTAB/pentanol/hexane/water RM was investigated using 20 relaxation exchange spectroscopy (REXSY), and was determined to be on the order of milliseconds. The proportion of alcohol in the interface was determined for all microemulsions which decreases as a function of increasing alcohol size. Each microemulsion was investigated by molecular simulations which produced oblate shaped droplets, which was associated with a non-homogeneous distribution of alcohol in the interface. CTAB was determined to be present in solely the interface of the microemulsions with the exception of the CTAB/pentanol/hexane/water RM. The CTAB/pentanol/hexane/water RM behaves differently as initially the CTAB was distributed between the RM and the continuous phase however, after time, the surfactant is re-distributed so that CTAB is present in only the interface. The RM sizes were determined using the CTAB diffusion coefficients. The droplet sizes decreased as a function of alcohol chain length, with the exception of the CTAB/pentanol/hexane/water RM which, after time, gave the largest droplet of all the microemulsions.
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Velcer, Tomáš. "Hyaluronanové hydrogely na bázi CTAT." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240558.

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This thesis studies the properties and behaviour of phase-separated hydrogels prepared by interaction of hyaluronan with oppositely charged surfactants. Three representatives of surfactants, namely cetyltrimethylammonium bromide, chloride and p-toluensulfonate (CTAB, CTAC, CTAT), were selected for comparison. Using the method of rheology, the fact that the system of Hya-CTAT forms the most rigid hydrogels has been proved. Higher molecular weight of hyaluronan has also direct influence on the volume and stiffness of the newly formed hydrogels. Preparation methods were compared as well. Mixing the stock solutions of entry components appeard to be the most suitable. Small-angle X-ray scattering was used for determination of shape and size of surfactant's micelles, concluding that it has no effect on the volume of formed gels. The results of this study indicate that given gels are to a certain extent competitive and incorporation of hyaluronan into their structure is desirable with respect to its biological activity. This offers a potential usage of these substances in the field of medical applications.
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Kábrtová, Petra. "Pokročilé mikroreologické techniky ve výzkumu hydrogelů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316186.

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This diploma thesis deals with the use of fluorescence correlation spectroscopy technique for microrheological characterization of hydrogel in a system of hyaluronate-cetyltrimethylammonium bromide. Fluorescently labelled particles were used for microrheological FCS analysis. To optimize the method the most appropriate size of particles was chosen on the basis of Newtonian glycerol solutions analysis. Among other things, the discussion was focused on the influence of refractive index change of analysed solutions on analysis results. After hyaluronate solutions analysis it was possible to assess the biopolymer concentration and molecular weight impact on the FCS microrheology results, which could then be compared with analysis results of model hydrogels of hyaluronate and CTAB. Finally, usability and limitations of FCS microrheology have been discussed.
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Schimann, Hubert C. R. "Force and Energy Measurement of Bubble-Particle Detachment." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9963.

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Possibilities for increasing the upper limit of floatable particle sizs in the froth flotation process have been examined since the early beginnings of mineral flotation. The economic implications of such an incresae are far ranging; from decreased grinding costs and increased recoveries to simplified flow-sheet design and increased throughput, all leading to increased revenue. Bubble-particle detachment has been studied to better understand the factors influencing the strength of attachment and the energies involved. Direct measurements of bubble particle detachment were performed using a hanging balance apparatus (KSV Sigma 70 tensiometer) and using a submerged hydrophobic plate in water. Three experiments were used; direct force measurement of bubble-particle detachment, detachment force and energy of a bubble from a submerged hydrophobic plate, and detachment force and energy of a cetyltrimethylammonium bromide coated silica sphere from a flat bubble. Octadecyltrichlorosilane was used as a hydrophobic coating in the first two experimental methods. These experiments were recorded with a CCD camera to identify the detachment processes involved. Energies for both methods were calculated and divided into the two main steps of the detachment process: Three-Phase-Contact pinning and three phase contact line sliding. The first step represents the energy barrier which must be overcome before detachment can begin. It is directly related to contact angle hysteresis. Detachment occurs during the second step, where the solid-vapor interface is replaced by solid-liquid and liquid-vapor. This step corresponds to the work of adhesion. The effects of surface tension, contact angle and hysteresis were well demonstrated with the three experimental methods. Good correlation was found between theoretical work of adhesion and measured energies.<br>Master of Science
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Mušková, Alexandra. "Příprava a charakterizace katanionických komplexů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414179.

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The diploma thesis deals with the preparation and characterization of catanionic complexes and their possible application to pharmaceutics and medicine. The catanionic complexes were prepared by mixing two oppositely charged surfactants with the concentration of 20 mmol·dm­3 in various volume ratios. Two systems were analyzed – CTAB + SDS and Septonex + SDS. Both systems were prepared in an aqueous and physiological environment. The turbidimetric analyses provided results of the intensity of turbidity of the prepared mixtures. The size and stability of the prepared particles were determined by DLS and ELS measurements. CTAB-rich samples showed significant viscosity changes and they were therefore characterized by rheological measurements. The results of this work show that the asymmetry of alkyl chains, surfactant selection, temperature, and ionic strength have a significant influence on the properties and self-assembly of surfactants in catanionic complexes.
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Venerová, Tereza. "Interakce hyaluronanu a amfifilních molekul." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-233374.

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This work is focused on interaction between hyaluronan (Hya) and amphiphilic molecules. Using fluorescent probes method were carried out screening of the interaction of various surfactants with Hya. For further examination was chosen cetyltrimethylammonium bromide (CTAB). Interactions in this system have also been studied using fluorescence correlation spectroscopy (FCS), and additionally were performed initial tests of the cytotoxicity of the system. As an alternative CTAB were also used hydrophobically modified amino acids. Results showed their self-aggregation, but their interactions with hylauronanem was not as strong as with CTAB. The interaction of gel systems Hya-CTAB have also been studied, and was found to contain a hydrophobic domain capable solubilize hydrophobic substance. Thermogravimetric have been established that are able to contain up to 98% wt. water and rheologically were characterized their mechanical properties. These are tunable due to molecular weight (MW) of the hyaluronate. With increasing value of MW increases mechanical strength of the gel and decreases its fluidity.
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Holubová, Anna. "Difúze organických molekul v hydrogelovém prostředí." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316187.

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This diploma thesis deals with study of hydrogels formed by phase separation of hyaluronan with oppositely charged surfactants cetyltrimethylammonium bromide (CTAB) and Septonex. It follows the bachelor thesis and extends the knowledge about the detailed characterisation of the inner environment of the hydrogel by determining the diffusion behaviour of the fluorescent probes Atto 488 and Nile Red using fluorescence correlation spectroscopy (FCS) technique and its modified version dual-focus fluorescence correlation spectroscopy (2f-FCS). Compared results showed that both methods show similar values and probes specifically interact with CTAB but Atto 488 shows only weak interaction with Septonex compared to Nile Red. Additionally, these interactions were not affected by the molecular weight of hyaluronan. In conclusion, it was recommended to measure this type of hydrogel in a small depth of gel using a conventional method.
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Repová, Romana. "Studium interakce záporně nabitých vezikulárních systémů s polykationty." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414178.

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This diploma thesis deals with the preparation and characterization of negatively charged catanionic vesicular systems and their combination with selected polycations. The catanionic vesicular system was prepared by mixing of two oppositely charged surfactants SDS and CTAB. The negative charge as well as the stability of the vesicular system was provided by the incorporation of phosphatidic acid. Polycations, DEAE and TMC, have been selected for use in a pharmaceutical applications. Characterization of the prepared systems was performed by measuring DLS and ELS. The results indicate that we were able to prepare stable negatively charged vesicles that were eligible to non-covalently interact with selected polycations.
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Mondek, Jakub. "Časově rozlišená fluorescence systémů polymer-tenzid." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216815.

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In this diploma thesis was studied time-resolved fluorescence in polymer-surfactant system. At first aggregation numbers of cationic (cetyltrimethylammonium bromide), anionic (sodium dodecylsulfate) and nonionic (Triton X-100) surfactants were studied by steady-state and time-resolved fluorescence spectroscopy. These two methods were compared. Aggregation numbers by steady-state method were always lower than aggregation numbers measured by time-resolved method. Steady-state method of determination aggregation numbers is useless for surfactants with high aggregation number and for aerated samples. Addition of hyaluronan to surfactant system was studied. There was observed change in aggregation number after addition of hyaluronan and change in percentage of dynamic quenching after addition of hyaluronan. Hyaluronan affected aggregation number of cetyltrimethylammonium bromide and Triton X-100. Hyaluronan increased percentage of dynamic quenching in cetyltrimethylammonium bromide and in Triton X-100. Pyren in sodium dodecylsulfate was quenched by sphere of action with negligible percentage of dynamic quenching and addition of hyaluronan had no effect on quenching. As next goal of this thesis, the determination of the position of fluorescence probe pyrene in cetyltrimethylammonium bromide, sodium dodecylsulfate and Triton X-100 micelles was chosen. Position of pyrene changed with charge and structure of micelles. Next was studied how percentage of dynamic quenching by iodide compounds changes with different charge of micelle. In all cases majority of dynamic quenching was calculated.
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Kotouček, Jan. "Charakterizace koloidních částic pomocí deprotonace v excitovaném stavu za použití pokročilých fluorescenčních technik." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240582.

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The deprotonation characteristics of fluorescent probes -naphthol and 8-hydroxypyrene-1,3,6-trisulphonic acid (HPTS) were studied in this diploma thesis, using steady-state and time-resolved fluorescence spectroscopy. Two cationic surfactants, Septonex and cetyltrimethylammonium bromide (CTAB), were studied. These surfactants were measured in the complex with hyaluronan (1.75 MDa, 1 MDa and 300 kDa). Steady-state fluorescence was used for determination of critical aggregation concentration of each surfactant and pKa*. Time-resolved fluorescence decays were used to calculate the average lifetimes and the deprotonation constants of naphthol and HPTS. The measurement with hyaluronan were compared with the polystyrenesulfonate (PSS) – surfactant system. The effect of hydration shell of hyaluronan on hyaluronan – surfactant complex formation results from the comparison of above mentioned systems. Large differences were found in the deprotonation characteristic between surfactants and even between individual molecular weights of hyaluronan. The measurement shows that the hydration shell is located near to the dissociated carboxyl groups of hyaluronan chain, where the interaction with the positively charged surfactants occurs. Furthermore, the aggregation number of Septonex was determined by quenching of pyrene using cetylpyridinium chloride (CPC) as a quencher. The aggregation number for 20 mM Septonex solution was determined as a value of 104 molecules. CPC was used for confirmation of the localization of -naphthol in the micelles of CTAB and polymer – CTAB, respectively.
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Book chapters on the topic "Cetyltrimethylammonium bromide"

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Holze, Rudolf. "Ionic conductance of cetyltrimethylammonium bromide." In Electrochemistry. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49251-2_654.

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Kurien, Biji T. "Cetyltrimethylammonium Bromide PAGE and Eastern Blotting." In Techniques in Life Science and Biomedicine for the Non-Expert. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70684-5_27.

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Akins, Robert E., and Rocky S. Tuan. "Cetyltrimethylammonium Bromide Discontinuous Gel Electrophoresis of Proteins." In Springer Protocols Handbooks. Humana Press, 1996. http://dx.doi.org/10.1007/978-1-60327-259-9_13.

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Akins, Robert E., and Rocky S. Tuan. "Cetyltrimethylammonium Bromide Discontinuous Gel Electrophoresis of Proteins." In Springer Protocols Handbooks. Humana Press, 2009. http://dx.doi.org/10.1007/978-1-59745-198-7_26.

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Lin, B., S. Mohanty, A. V. McCormick, and H. T. Davis. "Study of the Effects of Added Salts on Micellization of Cetyltrimethylammonium Bromide Surfactant." In ACS Symposium Series. American Chemical Society, 2003. http://dx.doi.org/10.1021/bk-2003-0861.ch020.

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Arfi, Rim Ben, Sarra Karoui, Karine Mougin, and Achraf Ghorbal. "Enhanced Removal of Eriochrome Black T from Water Using Phragmites Australis Functionalized with Cetyltrimethylammonium Bromide (CTAB)." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70548-4_63.

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Saga, Yoshitaka, Hiromu Kida, Yukihiro Nishikawa, and Hitoshi Tamiaki. "Chlorosomal Self-aggregation of Zinc Chlorophyll Derivatives in the Presence of Cationic Surfactant Cetyltrimethylammonium Bromide and Organosilanes in Aqueous Phase." In Photosynthesis. Energy from the Sun. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6709-9_71.

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Prieto, T., I. L. Nantes, and O. R. Nascimento. "Microperoxidase-9 cycle in the presence of cetyltrimethylammonium bromide micelles: tert-butyl hydroperoxide as both an oxidizing and a reducing agent." In Surface and Colloid Science. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b97071.

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Abu-Hamdiyyah, Mohammad, and Christiane M. El-Danab. "Strengthening of Hydrophobic Bonding and the Increase in the Micellar Degree of Ionization in Cetyltrimethylammonium Bromide Aqueous Solutions by Amphiphiles and the Micelle-Water Distribution Coefficient." In Surfactants in Solution. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-1831-6_29.

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Hadoudi, Nouhaila, M’hamed Ahari, Najlae Zaki, et al. "Removal Efficiency of Phenolic Compounds (Bisphenol A and Pentachlorophenol) by Adsorption Using a Bentonite-CTAB." In Recent Advances in Montmorillonite [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004783.

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Bentonite clay modified with cetyltrimethylammonium bromide (CTAB) has been investigated as an effective adsorbent for the removal of bisphenol A (BPA) and pentachlorophenol (PCP) from aqueous solutions. The adsorption performance of Bentonite-CTAB was evaluated by conducting batch adsorption experiments under different conditions. The adsorption isotherms of BPA and PCP on Bentonite-CTAB (BT-CTAB) were analyzed using the Langmuir and Freundlich models. The Langmuir model provided a better fit to the experimental data, suggesting the presence of monolayer adsorption. The adsorption kinetics of BPA and PCP on Bentonite-CTAB were studied using pseudo-first-order and pseudo-second-order models. The results indicate that the adsorption process follows pseudo-second-order kinetics, suggesting that the adsorption is controlled principally by chemisorption. Equilibrium time for both pollutants was achieved within 30–40 min. The results of adsorption studies indicated that Bentonite-CTAB exhibited excellent adsorption capacity for bisphenol A and pentachlorophenol. The high surface area and presence of active sites on Bentonite-CTAB favored adsorption of pollutants from aqueous solution. The adsorption process adopted pseudo-second-order kinetics, indicating the involvement of chemisorption. the adsorption isotherms of BPA and PCP on Bentonite-CTAB were analyzed using the Langmuir and Freundlich models. The Langmuir model provided a better fit to the data, suggesting monolayer adsorption.
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Conference papers on the topic "Cetyltrimethylammonium bromide"

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Ribeiro, Carlos A. A., Thais B. Fagundes, Gaspar Darin Filho, Patricia H. L. S. Matai, and Jean V. Ferrari. "Study of Corrosion of ABNT/AISI 1020 Steel in Surfactant Waterflooding Scenario." In LatinCORR 2023. AMPP, 2023. https://doi.org/10.5006/lac23-20537.

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Abstract Surfactant flooding can be one of the chemical-enhanced oil recovery methodologies (CEOR) applied during well production over time by reducing the oil-water interfacial tension and changing the rock's wettability. Surfactants, being surface-active agents, have also been studied with the function of film-forming corrosion inhibitors; however, at low concentration approaches, usually up to the critical micelle concentrations (CMC), around 1 mg/L to 100 mg/L. This work may contribute to studies about the anti-corrosive performance of such chemicals in waterflooding scenarios, which can inject contents up to 30,000 mg/L. Thus, this work aims to study the influence of a cationic surfactant, the cetyltrimethylammonium bromide (CTAB), and an anionic, the sodium dodecyl sulfate (DDS), on the corrosion of ABNT/AISI 1020 steel in NaCl 3% (w/w) static medium and pH 4 (adjusted with HCl aqueous solution).
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Dong, Yi, Zhe Li, Li-Ying Gao, Xiao Li, Zhi-Quan Liu, and Rong Sun. "Effects of cetyltrimethylammonium bromide (CTAB) on electroplating twin-structured copper interconnects." In 2021 22nd International Conference on Electronic Packaging Technology (ICEPT). IEEE, 2021. http://dx.doi.org/10.1109/icept52650.2021.9567924.

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Gudova, Yulia D., Vyacheslav I. Kochubey, and Alexander A. Skaptsov. "Is it possible to reuse growth cetyltrimethylammonium bromide solution of gold nanorods?" In Saratov Fall Meeting 2020: Optical and Nano-Technologies for Biology and Medicine, edited by Valery V. Tuchin and Elina A. Genina. SPIE, 2021. http://dx.doi.org/10.1117/12.2590816.

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Mićić, Svetlana, Jelena Rupar, Aleksandra Janošević Ležaić, and Nataša Pejić. "EFFECT OF QUERCETIN ON MICELAR PROPERTIES OF CETYLTRIMETHYLAMMONIUM BROMIDE IN ETHANOL-WATER MIXTURES: A CONTUCTIVITY STUDY." In 17th International Conference on Fundamental and Applied Aspects of Physical Chemistry. Society of Physical Chemists of Serbia, 2024. https://doi.org/10.46793/phys.chem24i.089m.

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Investigation of the micellization of cationic surfactant, cetyltrimethylammonium bromide (CTAB) in the presence of flavonoidquercetin (QR) was performed by conductance method. Specific conductivity data of CTAB + QR system in mixed ethanol-water solvent (10, 20 and 30% v/v) were obtained by increasing the CTAB concentration, whereas the QR concentration was kept constant at T = 27 °C. It was found that the critical micelle concentration (CMC) increased with increasing ethanol percentage in water. Moreover, two CMC values (CMC1 and CMC2) of CTAB, in the absence and presence of QR, were determined in 10% and 20% ethanolic solutions, whereas in 30% ethanol only one CMC was achieved in the examined CTAB concentration region.
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Suryanto, Heru, Bili Darnanto Susilo, Aminnudin, Irma K. Kusumaningrum, and Uun Yanuhar. "Effect of addition cetyltrimethylammonium bromide on morphology and functional groups of composite membrane bacterial nanocellulose - Titanium dioxide." In THE 4TH INTERNATIONAL CONFERENCE ON LIFE SCIENCE AND TECHNOLOGY (ICoLiST). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0111534.

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Maghfiroh, Riza Fithrotul, Choiril Azmiyawati, and Adi Darmawan. "Effect of cetyltrimethylammonium bromide on hydrophobicity of silica thin layer and xerogel derived from sodium silicate and methyltrimethoxysilane." In VIII INTERNATIONAL ANNUAL CONFERENCE “INDUSTRIAL TECHNOLOGIES AND ENGINEERING” (ICITE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0104042.

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Rosanti, Aulia Dewi, Fahmi Hidayat, Yuly Kusumawati, Arif Fadlan, Rizky Arief Shobirin, and Muchammad Achsanu Taqwim. "The influence of orange peel-cetyltrimethylammonium bromide (CTAB) modification to increase ZnO photocatalyst ability for methyl orange degradation." In THE 10TH INTERNATIONAL BASIC SCIENCE INTERNATIONAL CONFERENCE (BASIC) 2022. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0166489.

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Ahmad, Rabia, Qamer Faisal, and Sajjad Hussain. "Synthesis of silver nano-materials from Grevillea robusta A Cunn (Silver-oak tree) leaves extract and shape directing role of cetyltrimethylammonium bromide." In DAE SOLID STATE PHYSICS SYMPOSIUM 2015. Author(s), 2016. http://dx.doi.org/10.1063/1.4947678.

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Christesen, Steven D., Stephanie M. Garlick, and Fred R. Longo. "Microemulsion Aggregation Numbers Determined by Time-Resolved Luminescence." In Laser Applications to Chemical Analysis. Optica Publishing Group, 1990. http://dx.doi.org/10.1364/laca.1990.wb3.

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The time-resolved luminescence technique developed by Infelta et. al. 1 has been used to measure the aggregation numbers (number of surfactant molecules per aggregate) for microemulsions containing cetyltrimethylammonium bromid (CTAB) and cetyltrimethylammonium chloride (CTAC) as surfactants. Microemulsions are transparent dispersions of two immiscible liquids (e.g. oil and water) stabilized by an emulsifier comprising a surfactant and cosurfactant (Figure 1). The microemulsion aggregates typically have radii of 100-500 Angstroms. Microemulsions are being studied for possible use in decontamination of toxic organophosphorus compounds.
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Hassan, Anas Mohammed, Mohammed Ayoub, Mysara Eissa, Emad W. Al-Shalabi, Abdullah Almansour, and Abdulrahman Alquraishi. "Foamability and Foam Stability Screening for Smart Water Assisted Foam Flooding: A New Hybrid EOR Method." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22475-ms.

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Abstract The smart water-assisted foam flooding (SWAF) technique is a novel EOR method that is a synergic combination of smart water and foam-flooding methods. Smart water enables multi-level improvements, such as stabilizing foam-lamella and altering the wettability of the carbonate rock, which results in a desirable relative-permeability behavior. This paper experimentally investigated foam characterization related to enhanced oil recovery (EOR) using the smart water-assisted foam flooding (SWAF) technique including foamability and foam stability. This study aims to identify the foaming agents (surfactants) of the highest efficiency for employing in core flooding tests to establish their performance in porous-medium. Moreover, foamability and foam-stability tests were conducted to categorize the foams of selected anionic and cationic surfactants. The latter helps in developing an optimum surfactant aqueous solution (SAS) with the ability to form stable foams in both the presence and absence of crude oils with varying total acid and base numbers (TAN and TBN). The selected surfactants were Cetyltrimethylammonium bromide (CTAB), Dodecyltrimethylammonium bromide (DTAB), Alpha olefin sulfonate (AOS), and a commercial product termed as Alpha-foamer (Alkyl Ether Sulfates). These selected surfactants were tested in light, medium, and heavy crude oils from the Middle East region. Also, the effect of gases on foamability and foam-stability processes were examined using carbon dioxide (CO2) and nitrogen (N2). The gases were injected at a fixed flow rate (i.e., 25 and 50 mL/min) through surfactant solutions to generate foams. To determine the foam stability, the novel simplified R5 parameter was used, which involves introducing a controlled volume of gas into a finite volume of surfactant solution. Furthermore, in the screening process, it was observed that all the selected surfactants have good foamability with CTAB (e.g., 51 cm foam height in MgCl2 using N2 gas injection) and AOS (e.g., 49 cm foam height in MgCl2 using N2 gas injection) surfactants exhibiting the highest foam-durability when oil was absent. It was also noted that an increase in surfactant concentrations increased foam longevity. Moreover, the foam stability and oil-displacement efficiency were investigated using varying concentrations of CTAB, DTAB, Alfa-foamer, and AOS solutions. It was found that the presence of oil affected the foam columns’ stability. The extent of this effect depends on the surfactant-types, surfactant-concentrations, and the chemical solvation properties where stability decreases in the low concentration ranges of CTAB and all tested concentration ranges of DTAB. For the CTAB solution, it was observed that the oil remained in the lamella skeleton and its plateau borders without any noticeable drain out. Contrariwise, it was observed that DTAB could lift a sizable portion of the oil column, but could not sustain it for a longer duration with a quick drain out of oil. Incorporating CTAB and AOS into the SAS, enhanced its properties and proved to be the most effective foaming agent (i.e., both in the absence and presence of crude oil at R5 of 90 and 80%, respectively) used in core flooding for testing performance in a porous medium. Finally, under optimum SAS and smart water conditions, the proposed SWAF technique has the potential to be a commercially lucrative and environmentally acceptable novel hybrid EOR-method in carbonates.
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Reports on the topic "Cetyltrimethylammonium bromide"

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Mackay, Raymond A., H. D. Durst, Frederick R. Longo, and Barry L. Knier. The Catalytic Hydrolysis of p-Nitrophenyldiphenyl Phosphate in a CTAB (Cetyltrimethylammonium Bromide) Microemulsion. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada209392.

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Saiwan, Chintana. Mesostructural ultra thin silica film formation through admicellar technique. Chulalongkorn University, 2003. https://doi.org/10.58837/chula.res.2003.78.

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Thin silica film formation from adsolubilization of inorganic silica precursors, letra-n-butoxysilane (TBOS) and tetraethyl orthosilicate (TBOS) in admicellar polymerization were studies. Cetyltrimethylammonium bromide (CTAB) at 700 uM and octyl phenol ethoxylate or Triton X-100 at 200 uM were used as surfactant templates for adsolubilizates TBOS and TBOS respectively. For the TBOS/CTAB system, the atomic force microscopy (AFM) topographic images showed fibers, hemispheres and flat layers existing along with increase of surface coverge on the mica surface as the TBOS feed concentration was increased. The results showed phase separation at low TBOS concentration, At high TBOS concentration, where there was no phase separation, the silica film was flat layer of multi-layer occurring from solublization of silicate anion of oligomers at the admicelle-aqueous solution interface. For the TBOS/ triton X-100 system, the surface morphology on the mica surfaceexhibited the thin homogeneous globular-shaped implying solubilization of TBOS at the admicelle-water interface. Addition of styrene monomer and 2.2-azobisosobutyronitrile (AIBN) initiator promoted adsolubilization of TEOS significantly in admicellar core of triton x-100. The surface morphology of the film depended on the amount of styrene and TEOS feed concentrations. As the styrene concentration increases, the periodic structures become more homogeneous. Higher concentration of styrene assisted the incorporation of TBOS in the polystyrene and inhibited the formation of silica particles on the surface, At 3 uM styrene and TEOS concentrations, styrene and TEOS synergistically fabricate the composite silica film with high coverage density.
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