摘要
采用CO2气体溢出法研究了乙氧基化对非离子及阳离子表面活性剂最终生物降解性能的影响.结果表明,对于非离子表面活性剂APG与对应的AEG,经过乙氧基化后的AEG最终生物降解率较APG略有升高;对于阳离子表面活性剂二硬脂酸乙酯基甲基硫酸甲酯铵(2C17EQDMS)与对应的乙氧基化二硬脂酸乙酯基羟乙基甲基硫酸甲酯铵(2C17EQDMS-3EO),2C17EQDMS-3EO的最终生物降解率较2C17EQDMS也略有升高;对于三硬脂酸乙酯基甲基硫酸甲酯铵(3C17EQDMS)及对应的乙氧基化三硬脂酸乙酯基甲基硫酸甲酯铵(3C17EQDMS-n EO),3C17EQDMS-n EO的最终生物降解率较3C17EQDMS下降,并且随着EO链的增加,最终生物降解率呈下降趋势.
The effect of ethoxylation on ultimate biodegradability of surfactants was studied by CO2 evolu？tion method. The results showed that for nonionic surfactants alkyl polyglycosides （APG） and the correspond？ing AEG, after ethoxylation the ultimate biodegradability of AEG was increased slightly compared with APG;for anionic surfactants di-stearic acid methyl ammonium methylsulfate （2C17EQDMS） and the corresponding ethoxylated di-stearic acid hydroxyethyl methyl ammonium methylsulfate （2C17EQDMS-3EO）, after ethoxyl？ation the ultimate biodegradability of 2C17EQDMS-3EO was also increased compared with 2C17EQDMS; but for tri-stearic acid methyl ammonium methylsulfate （3C17EQDMS） and the corresponding ethoxylated tri-stea？ric acid methyl ammonium methylsulfate 3C17EQDMS-nEO, after ethoxylation the ultimate biodegradability of 3C17EQDMS-nEO was decreased, and with the increase of EO chains, the biodegradability was on the decline.
出处
《印染助剂》
CAS
北大核心
2014年第12期10-13,共4页
Textile Auxiliaries
基金
山西省青年基金项目(2011021010-2)
