摘要
采用分散聚合反应制备了纳米SiO_2/PS包覆粒子,并对其结构进行了表征。首先在超声波场中用表面活性剂对纳米SiO_2粒子进行亲油化处理,然后在氮气保护下利用超声波的分散、粉碎、活化、引发等多重作用,在实现纳米SiO_2粒子在反应介质中纳米分散的同时,引发苯乙烯单体在纳米SiO_2粒子表面发生分散聚合反应,制备出纳米SiO_2/PS包覆粒子。最后,采用SEM,TEM,FTIR,XPS等测试手段对纳米SiO_2/PS包覆粒子进行了表征,测试结果表明,PS实现了对纳米SiO_2的包覆,形成了核壳包覆结构。
In this paper, the polystyrene/nano-silica composite particles were prepared and characterizedaccording to the following steps. First, the nano-silica particles were pretreated with the surfactants under ul-trasonic field. Secondly, the dispersion polymerization of styrene in a water-ethanol medium, with poly（N-vinylpyrrolidone） （PVP） as stabilizer and 2, 2＇-azobisizobutyronitrile （AIBN） as initiator in the presence of nano-sil-ica particles was initiated through ultrasonic irradiation by taking its advantages of multieffect, i. e. , dispersion,crushing, activation, and initiation. Finally, the encapsulation of composite particles were investigated withSEM, TEM, FTIR and X-ray photoelectron spectroscopy （XPS）.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2016年第6期108-113,共6页
High Power Laser and Particle Beams
基金
supported by National Science Association Foundation of China(U1530102)
关键词
包覆粒子
纳米二氧化硅
聚苯乙烯
分散聚合
encapsulation
nano-silica particles
polystyrene
dispersion polymerization
