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) |
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Authors: | Fan Qi Zhao‐sheng Cai Xue‐mei Zhu Shi‐bing Shang Li‐jun Pei |
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Affiliation: | 1. , School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu, People's Republic of China;2. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, Jiangsu, People's Republic of China;3. +86 515 88298429 |
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Abstract: | 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 1H 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 (Mw) of LWCS have significant influence on the critical micelle concentrations (CMC) and the surface tensions at the CMC (γcmc). 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 Mw of LWCS were favorable for improving the stability of emulsions composed of water and benzene. |
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Keywords: | Polymeric cationic surfactants Low molecular weigh chitosan Surface activities Aggregate behavior Emulsifying property |
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