摘要：为防止球形铝粉在空气中腐蚀变质,采用溶液聚合法,通过硅烷偶联剂KH-550对超细铝粉进行预处理,在引发剂偶氮二异丁晴的作用下,用聚乙烯吡咯烷酮(PVP)对球形铝粉进行表面改性,形成了PVP-Al复合粒子。利用扫描电镜、能谱以及红外光谱对改性前后的铝粉进行表征分析;利用光电子能谱对复合粒子的形成原理进行分析。结果表明:复合粒子为具有核-壳结构的球形粒子,致密的PVP壳层包覆铝粒子;复合粒子的沉降率及耐腐蚀性优于原料铝粉。

关键词： 球形铝粉;包覆;复合粒子

Abstract： In order to improve the anti-corrosion of superfine aluminum powders in water， the superfine aluminum particles coated with a polyer membrane were investigated through copolymerazation， which used PVP as modifier， ABIN as initiator. The PVP -Al particles were analyzed by scanning electron microscope （SEM）， electron dispersive spectrum（EDS） and infrared spectrum （IR）. The experimental principle was analyzed by XPS. It was shown that the PVP-Al composite particles were spherical with core-shell structure. A PVP-Al composite particle was composed of dense PVP shell and Al core. The anti-resistance and hydrolysis rate of PVP-Al particles were improved insignificantly by comparing with the raw Al powders. 

Keywords： superfine aluminum powders； coating；composite particles