【摘要】 研究了醇对Triton X-100(TX-100)/环己烷/水体系形成微乳液的影响。考察了纳米S iO2制备中破乳温度和粒径分布,并利用TEM对其进行了研究。结果表明,当醇的链长不同时,界面膜的强度也不同,其中正辛醇的链长最匹配TX-100,界面膜的强度最大,产生最多的胶束数,纳米S iO2分散性最佳;己醇其次,戊醇再次;月桂醇的链长超过TX-100最多,因而界面膜的强度最低,纳米S iO2分散性最差。而异构醇体系易形成U体系,故产生的胶束数少,纳米S iO2易团聚。更多还原

【Abstract】 The effect of alcohol on microemulsions composed of Triton X-100,cyclohexane,co-surfactant and water was studied by means of emulsion breaking temperature,size distribution of nanosized silica,and TEM determination.It was found that interfacial film strength is closely related to the alcohol chain length,and branched isomers.In particular,the chain length of 1-octanol matches well with that of TX-100,so its interfacial film strength was highest,leading to the most number of micelle and optimum dispersion for preparing nanosized silica.For other alcohols,the chain length of(1-dodecanol) exceeded the effective length of TX-100 the most,so its interfacial film strength was minimum,(resulting) in the worst dispersion of nanosized silica.Branched alcohol isomers formed U system easily,resulting in the decrease of the number of micelle and(agglomeration) of nanosized silica.更多还原