具有可控分散性的不同粒径氨基酸双功能化介孔二氧化硅纳米颗粒(英文)  

Amino Acid Bifunctionalized Mesoporous Silica Nanoparticles with Controllable Particle Size and Dispersibility

作　　者：王玉[1] 韩璐[1] 车顺爱[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《高等学校化学学报》2011年第3期560-570,共11页Chemical Journal of Chinese Universities

基　　金：国家“九七三”计划项目(批准号:2009CB930403);国家自然科学基金(批准号:20890121,20821140537)资助

摘　　要：通过表面活性剂、共结构导向剂(CSDAs)和硅源的自组装合成了具有分散性的不同粒径氨基酸双功能化介孔二氧化硅纳米颗粒.利用表面活性剂头部与带相反电荷的CSDAs之间的静电相互作用使氨基和羧基基团均匀排列在介孔孔道表面.通过调节助溶剂或分散剂的加入量来控制颗粒粒径,调节合成溶液pH,改变纳米颗粒表面羧基基团和氨基基团的电荷量来控制颗粒的分散性.Amino acid bifunctionalized mesoporous silica nanoparticles with controllable particle size and dispersibility were synthesized via the cooperative self-assembly of surfactant,co-structure-directing agents（CSDAs）,and a silica source.Uniform distributions of acid and base organic groups on the mesopore surfaces were realized by interactions between the counter charged surfactant head groups on the one hand and ionic parts of CSDAs on the other hand.The particle size was well tuned with different amounts of co-solvent or dispersant,while the dispersibility of the bifunctionalized mesoporous nanoparticles was enhanced through changing the pH value of the solution to convert the chargement between cationic ammonio-anionic carboxylate and to shift the electrostatic force among the nanoparticles.

关 键 词：氨基酸 介孔 纳米颗粒 分散性 共结构导向剂 

分 类 号：O613.72[理学—无机化学]