.pmma / Pan Carbon Nanotube Precursor Preparation And Characterization

The aim of this paper is to study the preparation of carbon nanotubes'precursor which uses the technology of polymer manufacture. The emphasis of this study is the technology of emulsifier-free emulsion polymerization of the mono-dispersed .PMMA/PAN core-shell particles.Firstly,in this paper, mono-dispersed PMMA latex particles were first prepared by emulsifier-free emulsion polymerization, in which MMA acted as monomers and KPS acted as initiator.The effect factors such as temperature and MMA/KPS (the ratio of quality)which effect the emulsion stabilization of PMMA were investigated in details Then PMMA/PAN core-shell particles were prepared by an adsorption polymerization, in which mono-dispersed PMMA latex particles prepared by soap-free emulsion polymerization acted as seed latex, AN acted as monomers of shell, and KPS acted as initiator.The factors which effected the size and distribution of particles were investigated in details.At the same time, the mixing of nonionic surfactant on stabilizing core/shell particles were also studied.In this paper, the morphology of PMMA particles, PMMA/PAN composite particle were observed by SEM and TEM.It was observed that the surface of two particles were very different and PMMA / PAN particles were found with core-shell structure.The crystallization and the composition of the molecular chain of PMMA/PAN composite particles were characterized by FTIR and XRD respectively.PMMA/PAN particles were acted as precursor, hollow carbon nanospheres with high hydrogen storagabilty were synthsized by the technology of oxidation and carbonization.In this paper, the PAN paticles were synthsized by the technology of emulsifier-free emulsion polymerization. The carbon nanospheres which got stable quality and high production were made of the precursor of PAN particles by the technology of oxidation and carbonization.