Decyl trimethyl ammonium bromide

Other research confirmed the influence of the modification of bentonite in their adsorptive properties. The adsorption isotherms were determined with solutions of phenol in concentrations 50 mg L-i to 1000 mg L L in pH 6.5, at 20°C and 24 h. Structural changes were carried out with tetra-decy 1-trimethyl-ammonium bromide (TDTAB) and hexa-decyl-trimethy 1-ammonium bromide (HDTAB), with changes in 25%, 50% and 100% of capacity exchange cation. The equilibrium time was approximately 7 h and kinetic results indicated the possible presence of heterogeneous regions on the surfaces of clays modified with 25% and 50% of its cation exchange capacity. The clays modified with TDTAB and HDTAB in 100% obtained the best results for the removal efficiencies (Yilmaz Yapar, 2004). 

Dorrance et al have presented a series of papers reporting results of observations of both monomer and excimer fluorescence of pyrene within micelles of the cationic surfactants, decyl-, dodecyl-, tetradecyl- and hexadecyl trimethyl-ammonium bromide [116,119-121]. The concept is presented of a shell within which the planar pyrene molecules diffuse by essentially two-dimensional slippage through the hydrocarbon chains. The measurement of the temperature dependence of the rate of excimer formation in micelles containing two pyrene molecules revealed [121] that this mobility shell did not occupy the whole... 

The Raman spectra of n-hexyl, n-octyl, n-decyl, and n-dodecyl trimethyl-ammonium bromides in the 150-600 cm" region are shown in Fig. 1. Strong Raman bands are observed for all of these in the 160-300 cm region, and these shift markedly to a lower frequency with an increase in chain length. We may assign the bands observed at 251, 208, 179, and 164 cm to the accordion modes of the n-hexyl, n-octyl, n-decyl, and n-dodecyl chains, respectively. Figure 2 shows the linear relationship between the accordion band frequency and the reciprocal number of carbon atoms (1/Cn) for the fom n-alkyltrimethylammonium bromides. We may assume that the accordion band frequencies of the n-octyl, n-decyl, and n-dodecyl chains,... 

Ethoxylated methylcarboxylates Propoxyethoxy glyceryl sulfonate Alkylpropoxyethoxy sulfate as surfactant, xanthan, and a copolymer of acrylamide and sodium 2-acrylamido-2-methylpropane sulfonate Carboxymethylated ethoxylated surfactants (CME) Polyethylene oxide (PEG) as a sacrificial adsorbate Polyethylene glycols, propoxylated/ethoxylated alkyl sulfates Mixtures of sulfonates and nonionic alcohols Combination of lignosulfonates and fatty amines Alkyl xylene sulfonates, polyethoxylated alkyl phenols, octaethylene glycol mono n-decyl ether, and tetradecyl trimethyl ammonium chloride Anionic sodium dodecyl sulfate (SDS), cationic tetradecyl trimethyl ammonium chloride (TTAC), nonionic pentadecylethoxylated nonylphenol (NP-15), and nonionic octaethylene glycol N-dodecyl ether Dimethylalkylamine oxides as cosurfactants and viscosifiers (N-Dodecyl)trimethylammonium bromide Petrochemical sulfonate and propane sulfonate of an ethoxylated alcohol or phenol Petrochemical sulfonate and a-olefin sulfonate... 

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