CAJ | 학술논문

通过考察水与表面活性剂的摩尔比(R),TEOS的量、氨水的量及包壳次数对基于Triton X - 100/环已烷/正已醇/水反相微乳液体系制备二氧化硅纳米颗粒尺寸的影响,开展了基于反相微乳液法的尺寸可控性二氧化硅纳米颗粒制备研究.结果表明:在其他参数都恒定的情况下,通过改变微乳液体系中上述某一组分的量,可以在一定程度上实现二氧化硅纳米颗粒的尺寸可控性合成.首先,水与表面活性剂的摩尔比(R)对二氧化硅纳米颗粒的尺寸影响最大,随着R值的增大,颗粒的粒径逐渐减小,当R值达到18时,二氧化硅纳米颗粒的形貌变得不再是很规则的球形结构,并且分散性降低,团聚现象明显;其次是氨水的量,随着氨水量的增多,颗粒的粒径先减小,之后不再发生明显变化;另外随着包壳次数的增多,颗粒的粒径随之增大,并且颗粒之间的分散性也有所提高;但是TEOS的量对颗粒粒径的影响不明显.
통과고찰수여표면활성제적마이비(R),TEOS적량、안수적량급포각차수대기우Triton X - 100/배이완/정이순/수반상미유액체계제비이양화규납미과립척촌적영향,개전료기우반상미유액법적척촌가공성이양화규납미과립제비연구.결과표명:재기타삼수도항정적정황하,통과개변미유액체계중상술모일조분적량,가이재일정정도상실현이양화규납미과립적척촌가공성합성.수선,수여표면활성제적마이비(R)대이양화규납미과립적척촌영향최대,수착R치적증대,과립적립경축점감소,당R치체도18시,이양화규납미과립적형모변득불재시흔규칙적구형결구,병차분산성강저,단취현상명현;기차시안수적량,수착안수량적증다,과립적립경선감소,지후불재발생명현변화;령외수착포각차수적증다,과립적립경수지증대,병차과립지간적분산성야유소제고;단시TEOS적량대과립립경적영향불명현.
The preparation of size-controlled silica nanoparticles using base-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) in Triton X-100/cyclohexane/hexanol/water reverse microemulsion system was investigated. The effects of the water-to-surfactant molar ratio (R), the amount of ammonium hydroxide, the amount of TEOS, and the shell coating times on the size of silica nanoparticles were investigated, respectively. The results showed that the size of the prepared silica nanoparticles could be well controlled by changing some parameters of the reaction system. The water-to-surfactant molar ratio (R) was the main factor of the parameters on the size of the silica particles. The size of the particles decreased obviously with the increase of R, but the silica nanoparticles were aggregated and irregular when the R was at 18. And with the increase of ammonium hydroxide, the size of silica particles first decreased and then was not changed. The size and dispersibility of the prepared silica nanoparticles also changed obviously with the increase of the shell coating times. However, the amount of TEOS almost had no effect on the size of the particles. These results have provided practical foundation for the preparation of size controlled silica nanoparticles.