The Regulation Study On Electric Microfacies Structure Of Carbon Nanobubes/Dendrimers Functional Polymeric Membrane

At present, the researchs of carbon nanotubes (CNTs)/linear polymer system have become the foreground advancing research field. Proceed from the research of multicomponent polymer compatibility and the intermolecular interactions, we are realizing the chemical modification of carbon nanotubes in binary polymer matrix nanometer phase dispersion and the single component or two phases structure which ware formed through its corresponding nanowire morphology. Carbon nanotubes dendrimer modified from nanometer spherical got wide application by chemical covalent, meanwhile, intermolecular interactions using the dendrimer with IPN polymer matrix characteristic compatibility also was used, so that carbon nanotubes could disperse homogeneously in the IPN polymer matrix nanometer phase in single phase or two phase. The formation of carbon nanotube/dendrimer conductive composite system through the thermal induced polymerization, photopolymerization and the adjustment corresponding the kinetic parameters, implementation of binary polymer matrix duplex continuous and orderly structure of the control, finaly, the goal of regulation to optimise its conductivity can come true.In this paper, the development history, preparing method and application of PAMAM was introduced, then we summarize the conclusion of them. The phase separation and its control of poly (hydroxyethyl methylacrylate) PHEMA and poly (ethyl methacrylate) PEMA can appear phase separation behavior, therefore the control of phase separation conditions were discussed. Intermolecular interactions of PAMAM was analysised comparatively on the proper characteristic in the two component IPN as polymer matrix components system compatibility. The dispersion of carbon nanotubes in polymer binary IPNs polymer matrix was also studied through the modification of PAMAM by chemical covalent. The main contributions in this paper are as follows:1. A series of0.5～2.0G dendrimers (PAMAM) have been synthesized by diver- gent method with ethylenediamine as core. Its structure was characterized by using Fourier Transform Infrared Spectroscopy (FT-IR). The CNTs-COOH was prepared by using the method of mixed acid acidification of the periphery of the CNTs with carboxyl. Then, we prepared the CNTs-COC1by using CNTs-COOH with thionyl chloride to reaction. Finally,the PAMAM-CNTs was prepared by using2.0G PAMAM with CNTs-COC1to reaction.In order to study the structure of the CNTs-COOH, CNTs-COC1, PAMAM-CNTs. The structure were we characterized and analyzed by Fourier Transform Infrared Spectroscopy (FT-IR).2. In this article, PEMA/PHEMA polymer blends were prepared via the thermal polymerization, while PEMA/PHEMA polymer semi-IPNs were prepared via photopolymerization. The compatibility of two component polymer blends were verdicted by Differential Scanning Calorimeter (DSC), and the phase separation morphology structure of PEMA/PHEMA was observed by Laser Scanning Confocal Mcroscope (LSCM). The influence of the compatibility of two kinds of polymer blend and the interpenetrating network structure were analyzied the different conditions, such as the monomer mass ratio, the amount of crosslinking agents, polymeric temperature and illumination intensity. The research results indicated that the amount of crosslinking agent and temperature condition can affect the compatibility of two kinds of polymer blend and the appearance structure about interpenetrating network.3.2.0G PAMAM was marked with the fluorescein, then the binary PAMAM-DF/PEMA semi-IPNs was prepared after HEMA was reacted with the fluorescein PAMAM-DF by photopolymerization. EMA-CR was gained that EMA was taged with rhodamine B, then a ternary IPN system of PAMAM-DF/PEMA-CR/PHEMA and a quaternary IPN system of PAMAM-CNTs/PEMA/PHEMA were prepared by photopolymerization. their morphological structures were observed by Laser Scanning Confocal Microscope (LSCM), and we find the PAMAM and PHEMA were mutually soluble in microfacies dimensions, meanwhile PAMAM in binary PEMA/PHEM semi-IPNs polymer matrix was selectively dissolved of the PHEMA phase. The dispersion of CNTs and PEMA/PHEMA binary polymer was observed through Transmission Electron Microscopy(TEM). The results show that CNTs modified by PAMAM also dissolved selectively in the binary phase polymer matrix. The dispersion of CNT was effectively controlled through the control of binary polymer matrix in the duplex continuous structure.