CAJ | 학술논문

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。
이분산취합법제비적단분산삼취청알갑철수지(Melamine Formaldehyde,MF)미구위모구,경민화、활화、화학도등과정제비료포복금속얼화은적단분산미구。연구발현,감성도얼재도층후도급완정성、미구적구형도급단분산성방면우우산성도얼；FT-IR분석결과표명금속리자가여 MF결구중삼진배중담원자발생배위작용이형성화학건,저유리우제고금속도층여 MF모구적결합강도。열분석결과(DTA여TG)현시모구급도얼/은미구적분해봉온분별위420℃、400℃화382℃,저설명미구열은정성량호。
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 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 relatively high temperature was concerned in the applying process such as anisotropic conductive adhesive in microelectronics and so on.