Janus纳米材料的制备及结构调控  

Synthesis and Morphology Control of Janus Nanomaterials

作　　者：周鹏[1] 刘宝[1] 梁福鑫[1] 王倩[1] 屈小中[1] 杨振忠[1] 

机构地区：[1]中国科学院化学研究所高分子物理与化学国家重点实验室,北京100190

出　　处：《高等学校化学学报》2015年第7期1431-1436,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51233007;51173191;51173192;51203169)资助~~

摘　　要：用3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)、氨丙基三乙氧硅烷(APTES)和正硅酸乙酯(TEOS)溶胀聚苯乙烯中空微球的壳层,在壳层表面通过溶胶-凝胶过程,使亲油和亲水基团通过自组装作用分别朝向聚苯乙烯基体和水相,形成Janus结构.用良溶剂N,N-二甲基甲酰胺(DMF)溶解除去聚苯乙烯,得到二氧化硅基复合Janus纳米材料.改变反应体系p H值和单体用量等可以调控Janus纳米材料微结构,得到Janus中空球和纳米片.We propose a facile method to synthesize Janus nanomaterials by seed interfacial sol-gel process against a polystyrene （PS） hollow sphere using three precursor silanes, （3-aminopropyl） triethoxysilane （AFrES）, methacryloxy propyl trimethoxyl silane （MPS） and tetraethyl orthosilicate （TEOS）. The sol-gel process starts from the exterior surface of the seed sphere. Janus nanomaterials were formed in situ onto the seed sphere surface after a self-organized sol-gel process, which possess 3-methacryloxypropyl- and aminegroups terminated at both sides of the shell. Morphology of the Janus nanomaterials could be tunable from intact shell, nanosheet, porous nanosheet and individual nanoparticles by controlling pH, precursor amount and the fraction of binary emulsifier system. After the removal of PS by dissolution under ultrasonication, Janus nanoparticles were eventually achieved. This method is attractive owing to the easiness to continuously adjust morphology of the Janus nanomaterials. On the other hand, composition of the nanomaterials is also flexibly tunable by using different precursors. What＇ s more, the Janus nanomaterials can derive other Janus ones after selective modification and favorable growth of desired materials onto the corresponding side.

关 键 词：Janus纳米材料 溶胶-凝胶 界面 形态调控 

分 类 号：O631[理学—高分子化学] O648.11[理学—化学]