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时间:2020-03-26
《CTAB反相微乳体系的相行为研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第26卷第8期化学研究与应用Vo1.26,No.82014年8月ChemicalResearchandApplicationAug.,2014文章编号:1004—1656(2014)08—1200—10CTAB反相微乳体系的相行为研究王农,杨利娟,王兴权,肖蓉,陈利轩(兰州交通大学化学与生物工程学院,甘肃省植物源生物农药工程技术研究中心,甘肃兰州730070)摘要:实验绘制了系列十六烷基三甲基溴化铵(CTAB)+正丁醇+正己烷+水(或CaC1:水溶液)拟三元体系相图。分别研究了正丁醇的添加比例和CaC1:水溶液的浓度对微乳区域的影响,发现
2、随着正丁醇的相对比例逐渐增大,拟三元体系中微乳区的面积逐渐减小,表明过多增加正丁醇的量不利于微乳相的形成;发现总体上随着CaC1:水溶液摩尔浓度的增加,拟三元体系中微乳区的面积逐渐减小,表明强电解质的加入对微乳相影响较大,较高浓度的CaCI:会使部分CTAB失去表面活性而难以形成微乳液,导致微乳相区域逐渐减小。实验测定了电导率随水(或CaC1:水溶液)含量变化的规律,依据电解质理论探讨了微乳液的微观结构,并通过选择一定R0值的CaC1微乳液与等摩尔的碳酸钠水溶液反应制备了球形纳米碳酸钙粒子。关键词:微乳液;CrAB;拟三元体系相图;电导率
3、;纳米CaCO,中图分类号:0631;0642文献标志码:AStudyonthephasebehaviorofCTABreversemicroemulsionsystemWANGNong。,YANGLi-juan,WANGXing—quan,XIAORong,CHENGLi—xuan(SchoolofChemicalandBiologicalEngineering,LanzhouJiaotongUniversity,EngineeringandTechnologyCenterofGansuProvinceforBotanicalPesti
4、cides,Lanzhou730070,China)Abstract:Aseriesofquasiternaryphasediagramofhexadecyltrimethylammoniumbromide(CTAB)+n-butanol+n-hexane+water(brine)systemhavebeendrawnbasedonexperiments.Weinvestigatedtheinfluenceofcosurfactantn—butanolwithdiferentadditionandCaC1solutionwitlldife
5、rentmolarconcentrationonthemicroemulsionregionrespectively.Wefoundthattheareaofmicroemulsionregionintheternarysystemgraduallydecreasedwiththerelativeproportionsofeosurfactantn-butanolincrease,theseresultsshownthattheyarenotconducivetotheformationofmicroemulsionphasewhenth
6、eamountofn—butanolinrelativelyhighlevels;Wefoundthattheareaofmicroemulsionregionintheternarysystemdecreasedwiththeincreaseofthemo]arconcentrationofcalciumchloride,theseresultsshownthatstrongelectrolyteshasanimportantefectonthemicroemulsionphase,higherconcentrationofCaC12w
7、illnlakepartofCTABlosesu/~aceactivityandwillmakethesystemdifficulttoformmicroemulsion,theseleadstothedecreasingofmicroemulsionphasearea.Therulesofconductivitychangingwiththeaddedamountofwater(orCaC12aqueoussolution)weremeasuredexperimentally,themicroscopicstructureofmicre
8、emulsionhadbeendiscussedaccordingtotheelectrolytictheory,andspherenanometercalciumcarbonateparti
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