Rheological and Fluorescence Investigation of Interaction between Hexadecyltrimethylammonium Bromide and Methylcellulose in the Presence of Hydrophobic Salts

2010 ◽  
Vol 114 (15) ◽  
pp. 5083-5091 ◽  
Author(s):  
Aijaz Ahmad Dar ◽  
Ashesh Garai ◽  
Akhil Ranjan Das ◽  
Soumen Ghosh
Keyword(s):  
Hexadecyltrimethylammonium Bromide ◽  
Hydrophobic Salts

scholarly journals Synthesis of Hierarchical MOR-Type Zeolites with Improved Catalytic Properties

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4508
Author(s):  
Zeinab Mcheik ◽  
Ludovic Pinard ◽  
Joumana Toufaily ◽  
Tayssir Hamieh ◽  
T. Jean Daou
Keyword(s):  
Catalytic Activity ◽  
Amorphous Materials ◽  
Essential Role ◽  
Aluminum Content ◽  
Catalytic Properties ◽  
Hexadecyltrimethylammonium Bromide ◽  
Zeolite Framework ◽  
Ctab Concentration ◽  
Porous Volume ◽  
Synthesis Medium

Hierarchical MOR-type zeolites were synthesized in the presence of hexadecyltrimethylammonium bromide (CTAB) as a porogen agent. XRD proved that the concentration of CTAB in the synthesis medium plays an essential role in forming pure hierarchical MOR-type material. Above a CTAB concentration of 0.04 mol·L−1, amorphous materials are observed. These hierarchical mordenite possess a higher porous volume compared to its counterpart conventional micrometer crystals. Nitrogen sorption showed the presence of mesoporosity for all mordenite samples synthesized in the presence of CTAB. The creation of mesopores due to the presence of CTAB in the synthesis medium does not occur at the expense of zeolite micropores. In addition, mesoporous volume and BET surface seem to increase upon the increase of CTAB concentration in the synthesis medium. The Si/Al ratio of the zeolite framework can be increased from 5.5 to 9.1 by halving the aluminum content present in the synthesis gel. These synthesized hierarchical MOR-type zeolites possess an improved catalytic activity for n-hexane cracking compared to large zeolite crystals obtained in the absence of CTAB.

scholarly journals Formose reaction accelerated in aerosol-OT reverse micelles

2016 ◽  
Vol 12 ◽  
pp. 2663-2667 ◽  
Author(s):  
Makoto Masaoka ◽  
Tomohiro Michitaka ◽  
Akihito Hashidzume
Keyword(s):  
Reverse Micelles ◽  
Water Layer ◽  
Major Product ◽  
Hexadecyltrimethylammonium Bromide ◽  
Interfacial Water ◽  
Formose Reaction ◽  
Aerosol Ot ◽  
Aot Reverse Micelles ◽  
Triton X ◽  
C Nmr

The formose reaction in reverse micelles of aerosol-OT (AOT), triton X-100 (TX), and hexadecyltrimethylammonium bromide (CTAB) was investigated. Time–conversion data have indicated that the interfacial water layer of AOT reverse micelles is a medium that accelerates formation of glycolaldehyde in the formose reaction. The 13C NMR spectra for the products of the formose reaction using formaldehyde-13C as starting material are indicative of the formation of ethylene glycol as a major product.

scholarly journals An Ultrasonic Study of Sphere to Rod Transitions in Aqueous Solutions of Hexadecyltrimethylammonium Bromide.

1982 ◽  
Vol 36a ◽  
pp. 698-700 ◽  
Author(s):  
Sune Backlund ◽  
Harald Høiland ◽  
Ove J. Kvammen ◽  
Eva Ljosland ◽  
V. B. Sokolov ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Hexadecyltrimethylammonium Bromide ◽  
Ultrasonic Study
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