A Novel Biodegradable Fluorine-Containing Copolymer Surfactant |
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Authors: | Zhaoyang Luo Shanshan Wang Haojun Fan Chunchun Xia Jixin Yuan and Ruowang Liu |
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Institution: | (1) National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, People’s Republic of China;(2) College of Chemistry and Materials Science, Wenzhou University, Wenzhou, 325024, People’s Republic of China; |
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Abstract: | A novel fluorine-containing copolymer surfactant was synthesized via free radical copolymerization from maleic anhydride and
rapeseed oil firstly, and then followed by an esterification reaction with dodecafluoro heptanol. The reaction progresses
were monitored on-line by FTIR and the copolymerization was characterized by molecular weight (GPC) analysis. Simultaneously,
the surface tension and critical micelle concentration (CMC) together with the biodegradability of the fluorine-containing
copolymer surfactant were investigated in detail. The results indicate that this fluorine-containing surfactant with Mw of
66000 g/ mol and Mn of 38800 g/mol shows a strong surface tension lowering ability, the CMC is 0.1 g/L, the surface tension
value at the CMC (γCMC) is 22.5 mN m−1 and less than the corresponding copolymeric hydrocarbon surfactant; the evaluation of biodegradability indicates that the
biological respiration curve of the fluorine-containing copolymer surfactant with concentration of 1000 mg/L is above the
endogenous respiration curve; the BOD5/COD value is higher than 0.45; the COD and TOC removal ratios after 5 days of biodegradation reach 91.0 and 89.4%, respectively,
showing good biodegradability and environmental-friendly feature. |
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