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作 者:王亚魁 姜亚洁 耿涛 鞠洪斌 WANG Ya-kui;JIANG Ya-jie;GENG Tao;JU Hong-bin(China Research Institute of Daily Chemical Co.,Ltd.,Taiyuan 030001,Shanxi,China)
机构地区:[1]中国日用化学研究院有限公司,山西太原030001
出 处:《精细化工》2019年第1期44-50,共7页Fine Chemicals
基 金:国家重点研发计划资助项目(2017YFB0308900);山西省自然科学基金资助项目(201601D102023)~~
摘 要:以月桂酸、N, N-二甲基-1, 3-丙二胺和1, 3-二氯-2-丙醇为原料,在碳酸钠催化下合成了双酰胺基Gemini阳离子表面活性剂(ADQ-12)。通过FTIR和1HNMR对其结构进行了表征,并对其表/界面活性、抗静电性、抗盐性、抑菌性以及生物降解性能进行了测定。结果表明,25℃下,ADQ-12具有比传统单链阳离子表面活性剂低1~2个数量级的临界胶束浓度(CMC为1.41×10-4mol/L),表面张力(γCMC)为32.26mN/m;在ADQ-12质量浓度为0.05 g/L时,煤油/水界面张力(IFT)可降低至超低界面水平(4.1×10-3 mN/m),远低于十六烷基三甲基溴化铵(CTAB)的2.0mN/m;在质量浓度为1.0g/L时,ADQ-12对二价钙、镁离子具有优良的耐盐性能(>60 g/L);ADQ-12即使在低质量浓度下(10 mg/L)对金黄色葡萄球菌和大肠杆菌的抑菌率仍达到100%,相比双癸基二甲基氯化铵(DDAC), ADQ-12的抑菌能力更强;ADQ-12的7 d生物降解度能达到99%,表现出优异的生物降解性能。A Gemini cationic surfactant with diamide groups(ADQ-12) was synthesized using lauric acid,N,N-dimethyl-1,3-propanediamine and 1,3-dichloro-2-propanol as raw materials in the presence of a catalytic amount of sodium carbonate.The structure was characterized by FTIR and 1 HNMR.The surface/interfacial activity,antistatic property,salt resistance,antibacterial activity and biodegradation were measured.The results showed that ADQ-12 has a critical micelle concentration(CMC) value of 1.41×10^-4 mol/L,which is 1~2 orders of magnitude lower than conventional single cationic surfactants with a surface tension γCMC of 32.26 m N/m.When the mass concentration of ADQ-12 is 0.05 g/L,the interfacial tension of kerosene/water(IFT) could be reduced to ultra-low level(4.1×10^-3 m N/m),far lower than that of hexadecyl trimethyl ammonium bromide(CTAB)(2.0 m N/m).At a mass concentration of 1.0 g/L,ADQ-12 exhibits strong resistance to calcium and magnesium ions(>60 g/L).The inhibition rates of ADQ-12 against S.aureus and E.coli are still 100% even at a low mass concentration(10 mg/L),and the antibacterial activity of ADQ-12 is higher than that of didecyl dimethyl ammonium chloride(DDAC).In addition,ADQ-12 demonstrates excellent biodegradability,its biodegradation after 7 days is 99%.
关 键 词:双酰胺基团 GEMINI阳离子表面活性剂 油/水界面张力 应用性能
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