表面处理方式对纳米Al/PS微胶囊形态的影响  

Effect of Surface Treatment Method on the Morphology of Nano-aluminium/PS Microcapsules

作　　者：张凯[1,2] 傅强[1] 范敬辉[3] 周德惠[3] 

机构地区：[1]四川大学高分子科学与工程学院 [2]中国工程物理研究院结构力学研究所,四川绵阳621900 [3]中国工程物理研究院结构力学研究所

出　　处：《含能材料》2005年第5期301-304,共4页Chinese Journal of Energetic Materials

基　　金：中国工程物理研究院结构力学研究所创新基金(04CXJ-07)

摘　　要：纳米铝粉进行表面处理时所用表面活性剂的种类及用量直接影响Al/PS微胶囊的形态。纳米铝粉在超声波场作用下经Span-80或PEG处理后,可在纳米铝粉表面形成单体和引发剂的富集区,在适当条件下引发以纳米铝粉为核心的原位分散聚合反应。当Al粒子对PEG的吸附与初级粒子对PVP的吸附达到动态平衡时,制备出的Al/PS微胶囊表面光滑,分散性好,大部分Al粒子被PS包裹。The in-situ dispersion polymerization in the presence of nano- aluminium was used to prepare the nano-aluminium microcapsules by styrene （St） as monomer and ethyl alcohol as reaction media without oxygen and water,and effect of surface treatment was studied. The results show that the sorts and amounts of surfactant have great influences on the morphology of nano-aluminium/PS microcapsules. After treated with Span-80 or PEG under ultrasonic irradiation, in-situ dispersion polymerization on the surfaces of nano-aluminium is initiated in region containing rich monomer and initiator. When nano-aluminium absorbing PEG and primary nucleus absorbing PVP reach dynamic balance, WPEG = 20.0 wt% St, the nano-aluminium microcapsules with smooth surfaces and well dispersion can be prepared, which can encapsulate most nano-aluminium.

关 键 词：材料科学 纳米铝粉 微胶囊 表面处理 形态 纳米铝粉 表面处理 微胶囊 形态 SPAN-80 PEG处理 初级粒子 分散聚合反应 表面活性剂 

分 类 号：TB383[一般工业技术—材料科学与工程]