表面活性单体2-丙烯酰胺基十四烷磺酸钠的合成及其胶束化行为的研究

Synthesis of surface active monomer NaAMC_(14)S and research of its micellar behavior

以丙烯腈与1-十四烯为主要原料合成了表面活性单体2-丙烯酰胺基十四烷磺酸钠(N aAM C14S),用红外光谱与核磁共振谱确认了N aAM C14S的化学结构,用紫外光谱测定了N aAM C14S在水中的溶解度,用表面张力法(环法)与电导法测定了N aAM C14S在不同温度下的临界胶束浓度(CM C)。结果表明,以丙烯腈与1-十四烯为原料可较顺利地合成N aAM C14S,其K rafft点为22℃,25℃下CM C为9.2×10-4m o l.L-1,且CM C随温度变化很小,25℃的表面张力为48.2mN.m-1,表明N aAM C14S具有较高的表面活性。

Surface active monomer of sodium 2-acrylamido-tetradecane sulfonate （NaAMC14S） was synthesized by using acrylonitrile and tetradecene as main raw materials, and its chemical structure was characterized with FTIR and ^1H-NMR. The solubility of NaAMC14S was determined by UV spectrophotometry, and the critical micelle concentrations at different temperatures were measured by using two methods of surface tension and conductivity measurements at the same time. The experiment results show that the Krafft point of NaAMC14S is 22℃, its critical micelle concentration （CMC） is 9. 2×10^-4mol·L^-1 at 25℃, and the aeeorinding surface tension γCMC is 48.2mN·m^-1 which displays that NaAMC14S possesses higher surface activity. Besides, the critical micelle concentrations of NaAMC14S do not change nearly with temperature.