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Synthesis, Characterization, and Performance of a Novel Polymeric Cationic Surfactant Based on Low Molecular Weight Chitosan and 3‐Chloro‐2‐Hydroxypropyl Dimethyl Dehydroabietyl Ammonium Chloride (CHPDMDHA)
Author(s) -
Qi Fan,
Cai Zhaosheng,
Zhu Xuemei,
Shang Shibing,
Pei Lijun
Publication year - 2015
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 - 10.1007/s11743-015-1676-8
Subject(s) - chemistry , cationic polymerization , aqueous solution , critical micelle concentration , pulmonary surfactant , ammonium chloride , grafting , chitosan , nuclear chemistry , polymer chemistry , surface tension , chloride , micelle , organic chemistry , polymer , biochemistry , physics , quantum mechanics
A series of novel polymeric cationic surfactants based on low molecular weight chitosan (LWCS) and 3‐chloro‐2‐hydroxypropyl dimethyl dehydroabietyl ammonium chloride (CHPDMDHA), LWCS‐ g ‐CHPDMDHA, were obtained by the grafting modification of LWCS with CHPDMDHA as grafting agent. The structure of LWCS‐ g ‐CHPDMDHA was confirmed by FT‐IR and 1 H NMR, and the degree of quaternizing substitution (DS) of LWCS‐ g ‐CHPDMDHA was determined according to the results of elemental analysis. The aggregation behavior and surface activities of LWCS‐ g ‐CHPDMDHA in aqueous solution were investigated by transmission electron microscopy (TEM) and determination of surface tension, respectively. The experimental results showed that the DS and molecular weight ( M w ) of LWCS have significant influence on the critical micelle concentrations (CMC) and the surface tensions at the CMC ( γ cmc ). The shape of aggregates changed with the variation of concentration of LWCS‐ g ‐CHPDMDHA in aqueous solution. When the LWCS‐ g ‐CHPDMDHA was utilized as an emulsifier, the increase of DS of LWCS‐ g ‐CHPDMDHA and M w of LWCS were favorable for improving the stability of emulsions composed of water and benzene.