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Citation: TAO Xianping, ZHANG Yuejun, LI Xia, JIA Xu. Relationships Between Structures and Properties of Diallylmethylalkylammonium Bromide[J]. Chinese Journal of Applied Chemistry, ;2015, 32(3): 342-349. doi: 10.11944/j.issn.1000-0518.2015.03.140227 shu

Relationships Between Structures and Properties of Diallylmethylalkylammonium Bromide

TAO Xianping ^a,, ,
ZHANG Yuejun ^b,, ,
LI Xia ^a ,
JIA Xu ^b

1.
a College of Chemical and Biological Engineering, Nantong Professional Institute, Nantong, Jiangsu 226007, China;
2.
b School of Chemical Engineering, Nanjing University of Science and Technology, Nanfing 210094, China

Corresponding author: TAO Xianping, ZHANG Yuejun,
Received Date: 30 June 2014
Available Online: 29 September 2014

The properties and performances of four kinds of quaternary ammonium salt monomers were researched. The relationships between structures and properties or performances for the four kinds of diallylmethylalkyl(n=12,14,16,18) ammonium bromides(marked C12,C14,C16,C18) were discussed on the basis of the determination of the thermal stability, surfactivity and flocculation ability. Quaternary ammonium salts C12~C18 decompose within 170~300℃,172~303℃,170~293℃ and 170~310℃,their mass loss rates are 92.8%, 92.6%, 96.4% and 87.4%, respectively. Their critical micelle concentration(cmc) and the corresponding surface tension(γ_cmc) are 2.0,3.5,1.4,1.1 mmol/L and 26.6,25.2,33.8,35.8 m N/m,respectively. All monomers show excellent surfactivity. The quaternary ammonium salt C16 possesses the best foaming power and foam stability. C12 Krafft point is <0℃. Krafft points of C14,C16 and C18 are 1℃,8℃ and 19℃,respectively. The C12 and C14 appear the strongest flocculation ability to bentonite and kaolin suspansion,indicating that the flocculation performance of monomers are of certain selectivity to structures.
- diallylmethylalkylammonium bromides,
- quaternary salts,
- structures and properties,
- thermal stability,
- surfactivity,
- flocculation ability
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