Pickering乳液双相反转研究表面活性剂在纳米粒子表面的吸附研究
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摘要
本实验通过制备纳米粒子和表面活性剂协同稳定的Pickering乳液,对乳液的双相反转的现象进行研究。结果表明,随表面活性剂浓度提高,乳液类型从O/W转变成W/O型,再转变成O/W型,即发生双相反转现象。基于实验现象提出了不同表面活性剂浓度条件下表面活性剂分子在纳米粒子表面的吸附模型,即单层吸附和双层吸附导致纳米粒子由偏亲水向偏疏水再到偏亲水性的转变。
Double inversion of pickering emulsions stabilized synergistically by nanoparticles and a di-chain cationic surfactant was investigated.The result show that the double phase inversion of Pickering emulsions was achieved as the concentration of emulsifier increases,i.e.the emulsions changed from O/W type to W/O type,and to O/W type again. A precise mechanism of this double phase inversion was proposed.Under high emulsifier concentration,the particles were reversed to be hydrophilic by the formation of a surfactant bi-layer on surface of particles and the emulsion inverses from W/O to O/W type.
Double inversion of pickering emulsions stabilized synergistically by nanoparticles and a di-chain cationic surfactant was investigated.The result show that the double phase inversion of Pickering emulsions was achieved as the concentration of emulsifier increases,i.e.the emulsions changed from O/W type to W/O type,and to O/W type again. A precise mechanism of this double phase inversion was proposed.Under high emulsifier concentration,the particles were reversed to be hydrophilic by the formation of a surfactant bi-layer on surface of particles and the emulsion inverses from W/O to O/W type.
引文
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[3]刘若林,李嘉诚,冯玉红,等,月桂醇基海藻酸钠与层状双金属纳米颗粒稳定载药Pickering乳液及其缓释性能[J].高分子材料科学与工程,2015,31:102-107.
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[5]Gao J,Li D,Jiang Y,et al.Pickering emulsion stabilized by immobilized bienzyme nanoparticles:a novel and robust system for enzymatic purification of isomaltooligosaccharide[J].Ind Eng Chem Res,2014,53:18163-18169.
[6]王丽,周宏伟,蒋文远,等.纳米二氧化硅的疏水改性及其对Pickering乳液的稳定作用[J].精细化工,2016,33(3):252-258.
[7]黄维安,蓝强,张妍.胶体颗粒在液-液界面上的吸附行为及界面组装[J].化学进展,2007,19(23):212-219.
[8]史慧,樊兆玉,刘洪来.表面改性纳米二氧化硅颗粒乳化十二醇_甘油体系[J].华东理工大学学报,2016,42(1):15-20.
[9]凡青,李学丰,董金凤.阴/非离子表面活性剂复配体系对O/W乳液粒径及稳定性的影响[J].武汉大学学报(理学版),2016,62(1):31-35.
[10]潘庆谊,陆晴,程知萱,等.W/O微乳液体系稳定条件的研究[J].化学研究与应用,2001,13(3):284-286.
[11]Lan Q,Yang F,Zhang S.Synergistic effect of silica nanoparticle and cetyltrimethyl ammonium bromide on the stabilization of O/W emulsions[J].Colloid Surf A,2007,302:126–135.
[12]Binks B P,Yin D.Pickering emulsions stabilized by hydrophilic nanoparticles:in situ surface modification by oil[J].Soft Matter,2016,12:6858-6867.
[13]Fouconnier B,Román-Guerrero A,Jaime E.Effect of[CTAB]–[Si O2]ratio on the formation and stability of hexadecane/water emulsions in the presence of Na Cl[J].Colloid Surf A,2012,400:10-17.
[14]Zhang S,Zhou Y,Yang C.Pickering emulsions stabilized by the complex of polystyreneparticles and chitosan[J].Colloid Surf A,2015,482:338–344.
[2]Leclercq L,Mouret A,Renaudineau S.Self-assembled polyoxometalates nanoparticles as pickering emulsion stabilizers[J].J Phys Chem B,2015,119:6326-6337.
[3]刘若林,李嘉诚,冯玉红,等,月桂醇基海藻酸钠与层状双金属纳米颗粒稳定载药Pickering乳液及其缓释性能[J].高分子材料科学与工程,2015,31:102-107.
[4]Yan H,Zhao B,Long Y,et al.New pickering emulsions stabilized by silica nanowires[J].Colloid Surf A,2015,482:639-646.
[5]Gao J,Li D,Jiang Y,et al.Pickering emulsion stabilized by immobilized bienzyme nanoparticles:a novel and robust system for enzymatic purification of isomaltooligosaccharide[J].Ind Eng Chem Res,2014,53:18163-18169.
[6]王丽,周宏伟,蒋文远,等.纳米二氧化硅的疏水改性及其对Pickering乳液的稳定作用[J].精细化工,2016,33(3):252-258.
[7]黄维安,蓝强,张妍.胶体颗粒在液-液界面上的吸附行为及界面组装[J].化学进展,2007,19(23):212-219.
[8]史慧,樊兆玉,刘洪来.表面改性纳米二氧化硅颗粒乳化十二醇_甘油体系[J].华东理工大学学报,2016,42(1):15-20.
[9]凡青,李学丰,董金凤.阴/非离子表面活性剂复配体系对O/W乳液粒径及稳定性的影响[J].武汉大学学报(理学版),2016,62(1):31-35.
[10]潘庆谊,陆晴,程知萱,等.W/O微乳液体系稳定条件的研究[J].化学研究与应用,2001,13(3):284-286.
[11]Lan Q,Yang F,Zhang S.Synergistic effect of silica nanoparticle and cetyltrimethyl ammonium bromide on the stabilization of O/W emulsions[J].Colloid Surf A,2007,302:126–135.
[12]Binks B P,Yin D.Pickering emulsions stabilized by hydrophilic nanoparticles:in situ surface modification by oil[J].Soft Matter,2016,12:6858-6867.
[13]Fouconnier B,Román-Guerrero A,Jaime E.Effect of[CTAB]–[Si O2]ratio on the formation and stability of hexadecane/water emulsions in the presence of Na Cl[J].Colloid Surf A,2012,400:10-17.
[14]Zhang S,Zhou Y,Yang C.Pickering emulsions stabilized by the complex of polystyreneparticles and chitosan[J].Colloid Surf A,2015,482:338–344.