摘要
以十二烷基二甲基叔胺、环氧氯丙烷为原料,合成了中间体(2,3-环氧丙基)十二烷基二甲基氯化铵(DMAC),再与磺化木质素(SL)酚羟基反应,合成了木质素两性表面活性剂LAS。通过正交实验确定了最佳合成条件:以丙酮为溶剂,n(SL)∶n(DMAC)=1∶1.1,反应时间3h,pH=12,反应温度55℃,产物中氮质量分数达2.25%。通过元素分析、傅立叶变换红外光谱、UV,确证了目的产物结构。测定产物的临界胶束质量浓度CMC为3g/L,γCMC为21.11mN/m,HLB值为10。表明所合成的木质素两性表面活性剂具有较高的表面活性。
（2,3-Epoxypropyl） dimethyl-ammonium chloride（DMAC） was synthesized with N,N-dimethyl dodecylamine and epichlorohy as raw materials in this article.Then the LAS（lignin amphoteric surfactant） was prepared by the DMAC with SL（sulphonated lignin）.Through the orthogonal experiment,the optimal preparation condition was investigated：using acetone as the solvent,n（SL）：n（DMAC） was 1：1.1,reaction time was 3 h,reaction temperature 55 ℃,pH value was 12.The nitrogen content of LAS reached 2.25%.The structure of the product was characterized by FTIR spectrum,UV and elementary analysis.The surface activities of the product were measured：critical micelle concentration（CMC） 3 g/L,their surface tension was 21.11 mN/m,HLB was 10.Results showed that LAS exhibited a higher surface activity.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2010年第8期765-768,774,共5页
Fine Chemicals
基金
陕西省"13115"工程重大科技专项秸秆无污染分解高值化利用技术(2008ZDKG-43)
陕西省2010年第一批引进国外技术管理人才项目
玉米秸秆高值化利用技术(20106100067)~~
关键词
木质素
两性表面活性剂
物化性能
lignin
amphoteric surfactant
physic-chemical property
