单分散镀镍/银三聚氰胺甲醛树脂微球制备与表征  

Preparation of the mono-dispersed melamine formaldehyde microspheres coated with Ni/Ag

作　　者：黄玉安[1] 秦安川[1] 杭祖圣[1] 张可强[1] 谭学峰[1] 朱家柱 唐涛[2] 黄润生[2] 

机构地区：[1]南京工程学院材料工程学院,南京211167 [2]南京大学物理学院,南京210093

出　　处：《南京大学学报（自然科学版）》2014年第1期54-60,共7页Journal of Nanjing University（Natural Science）

基　　金：国家863计划(2006AA03Z458);国家自然科学基金(50977042;10904061);南京工程学院科研基金(YKJ201002)

摘　　要：以分散聚合法制备的单分散三聚氰胺甲醛树脂(Melamine Formaldehyde,MF)微球为母球,经敏化、活化、化学镀等过程制备了包覆金属镍和银的单分散微球.研究发现,碱性镀镍在镀层厚度及完整性、微球的球形度及单分散性方面优于酸性镀镍;FT-IR分析结果表明金属离子可与MF结构中三嗪环中氮原子发生配位作用而形成化学键,这有利于提高金属镀层与MF母球的结合强度.热分析结果(DTA与TG)显示母球及镀镍/银微球的分解峰温分别为420℃、400℃和382℃,这说明微球热稳定性良好.The creation of monodisperse microsphere with micrometer size and submicrometer size has been attracting much attention in recent years owing to their wide potential applications,such as biomedical field,information industry,microelectronics,etc.In the past decade,various materials such as glass,PS and PMMA were used to synthesized monodisperse microspheres and those microspheres were applied to fabricate functional microspheres containing metallic Ag,Au,Ni and so on.However,to the best of our knowledge,MF microsphere has not been reported.Thus in this paper,the monodisperse melamine formaldehyde resin（MF）microspheres was prepared by dis-persion polymerization in aqueous solution firstly.After pre-treatment of sensitization and activation,the microspheres coated with metallic nickel（MF Ni）and silver（MF Ag）were prapared with chemical plating method. The SEM and TEM results showed that MF Ni plated under alkaline condition was of high quality than that of under acidic condition about certain characteristics,ie the thickness and completeness of the coating,the sphericity and the diameter dispersion coefficient of the microspheres.The EDS and XRD patterns implied that the microsphere of MF Ni prepared under alkaline condition contained much more nickel than that of under acidic condition,and the＆amp;nbsp;microsphere of MF Ag thus prepared contained more metallic Ag.The FT-IR spectra revealed that ionic metals such as Pd2＋ and Ag＋ would complexing with N in the triazine ring of melamine,which may enhance the interaction between coating metals and MF.The DTA results showed that the peak of pyrolysis of MF microspheres was about 420 ℃,while the peak of pyrolysis of Ni coated and Ag coated MF microspheres were 400 ℃ and 382 ℃respectively,which imply the excellent thermostability.The TG curves discovered that the MF Ni contains 6%metallic Ni,and MF Ag contains 45% metallic Ag respectively.All the properties mentioned above implied that MF Ni and MF Ag microspheres might be used in many fields when

关 键 词：三聚氰胺甲醛树脂 单分散微球 镀 银 镀 镍 化学镀 

分 类 号：TQ153.12[化学工程—电化学工业]