不同乳化剂对抗氧剂乳化作用的研究

Study on emulsification of different emulsifiers against oxygen

以对甲酚和双环戊二烯丁基化产物(CPL)为主抗氧剂,硫代二丙酸双月桂酯(DLTP)为辅抗氧剂,分别用油酸钾、松香酸钾、十二烷基苯磺酸钠通过相转变乳化法制得不同抗氧剂乳液样品,通过粒径尺寸、粒径分布以及乳液稳定性(TSI)测试,证实油酸钾、松香酸钾、十二烷基苯磺酸钠皆可将抗氧剂CPL和DLTP乳化成具有一定粒子尺寸及稳定性的抗氧剂乳液。测试结果表明,与松香酸钾、十二烷基苯磺酸钠相比,以油酸钾为乳化剂所制备的抗氧剂乳液具有更小的粒径分布和较好的稳定性。进一步改变油酸钾用量,证实当乳化剂含量为6%时体系具有最优的粒径尺寸、粒径分布与稳定性。

Different antioxidants emulsion samples were prepared by phase inversion technology using p-cresol and dicyclopentadiene and isobutylene(CLP)as the main antioxidant and Dilauryl thiodipropionate(DLTP)as the auxiliary antioxidant.Potassium oleate,potassium rosinate and sodium dodecyl benzene sulfonate(SDB)were chosen as surfactant,respectively.Through particle size,particle size distribution and emulsion stability test,it is proved that the antioxidants CPL and DLTP can be emulsified using these surfactants.The test results showed that compared with potassium rosinate and sodium dodecyl benzene sulfonate,the antioxidant emulsion prepared by potassium oleate as emulsifier is more stable.It was confirmed that 6%potassium oleate is the best surfactant concentrations by observing the curves of particle size distribution and instability curves.