摘要
以脱氢松香酸为原料,经磺化、中和反应合成了一种非对称Bola型表面活性剂磺化脱氢松香酸二钠盐(DSDA),利用FT-IR、1HNMR及MS对目标产物结构进行确证,采用表面张力法确定了DSDA在303.0K、pH值为10.5时的临界胶束浓度(CMC),考察了其在不同NaCl浓度(0～0.50mol/L)下的表面活性。结果表明,DSDA溶液表面张力-浓度曲线出现了一个转折点;一定温度下,随着NaCl浓度的增大,DSDA溶液CMC从25mmol/L降至3.83mmol/L,表面极限吸附量(Г∞)下降,最低表面张力(γCMC)基本不受影响。
A new unsymmetrical Bolaform surfactant, namely disodium sulfodehydroabietate （DSDA） was synthesized by sulfonation of dehydroabietic acid followed by neutralization, and its structure was characterized by FT-IR, ^1H NMR and MS. The critical micelle concentration （CMC） of DSDA was determined by surface tension method at 303.0 K, pH value 10. 5. The surfactivity at different NaCl concentrations （0 - 0.50 mol/L） was studied. The results showed that DSDA shows a transition in its surface tension curve ; the CMC of DSDA solution decreases from 25 mmol/L to 3.83 mmol/L along with the increase of NaCl concentration, the surface ultimate adsorption at the air/water interface （Г∞） decreased and the minimum surface tension was basically unaffected.
出处
《林产化学与工业》
EI
CAS
CSCD
2008年第1期103-107,共5页
Chemistry and Industry of Forest Products
