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Influence of Cationic Surfactants on the Crystallization of Cis‐ and Trans‐Isomers
Author(s) -
Yu Qiushuo,
Qiao Xiaoyan,
Qi Min,
Li Xiaorui
Publication year - 2018
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1002/jsde.12044
Subject(s) - chemistry , crystallization , cis–trans isomerism , cationic polymerization , fumaric acid , bromide , maleic acid , aqueous solution , potassium bromide , octadecane , organic chemistry , polymer chemistry , polymer , copolymer
The crystals of cis‐ and trans‐isomers present in principle similar chemical groups on their respective crystal faces. Here, the crystallization of cis‐ and trans‐isomers (maleic acid and fumaric acid) in an aqueous solution containing cationic surfactants with different hydrophobic chains (the long hydrophobic chains of dodecyltrimethylammonium bromide < cetyltrimethylammonium bromide < trimethylstearylammonium bromide) was investigated. Results showed that the surfactants presented different effects on the crystallization of cis‐ and trans‐isomers. For trans‐isomers (fumaric acid), the surfactants with longer hydrophobic chains or higher solution concentrations will favor a wider metastable zone width (MZW) and a greater morphology change. By contrast, both the MZW and morphology development of cis‐isomers (maleic acid) were not affected by these surfactants. The chemical groups on crystal faces, surface grooves, and molecular polarity were compared to reveal the different influences of surfactants on the crystallization of cis‐ and trans‐isomers.