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The Modification of Carbon Nanomaterials in the Modification and the Self-Assembly of Its Derivatives in Copolymer

Author: WangJing
Tutor: ChenGuangXin
School: Beijing University of Chemical Technology
Course: Materials Science and Engineering
Keywords: Copolymer Self-assembly C60 CNTs Decorate
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 50
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Abstract


In this paper, the film self-assembly behavior of block copolymer PS-PEO composite system , the article uses a different method of fullerene (C60) and carbon nanotubes (CNTs) modified , then its derivative the addition of the block copolymer PS-PEO , studied the self-assembly behavior of the the two composite system in silicon as well as on the surface of the water . Specifically the following aspects: 1 . Using atom transfer radical polymerization method that ATRP in the C60 surface grafted polystyrene PS, C60- PS Brown powder easily soluble in organic solvents , can be calculated for each C60 surface grafting 3-4 PS chain . Chopped multi- walled carbon nanotubes by ultrasound of mixed acid , followed by polyethylene glycol in the surface of the carbon tube , prepared well dispersed in aqueous solution MWNTs- PEG . 2 . Nanoparticles C60 , and C60-PS is added to the PS-PEO, block copolymers and study its impact on the self-assembly of PS-PEO . The study found that the methylene chloride and chloroform is the preferred annealing solvent . Unmodified C60 added composite system will occur after the reunion, and not conducive to the formation of the layered structure of the block copolymer ; adding the right amount of C60-PS is conducive to the formation of the layered structure of the PS-PEO but PS phase size larger . Film self-assembly for Water , the basic laws and silicon thin films have been , but affect the conditions for more and more complex , a short time annealing , C60-PS added play a key role when prolonged annealing , solvent atmosphere is a major factor in . After the modified carbon nanotubes are also added to the block copolymer PS-PEO , the study found that the adding of the carbon nanotubes on the self-assembled block copolymer PS-PEO has a great influence . Adding one arm carbon nanotubes PS-PEO block copolymer self-assembly into vesicle-like , PEO as the main phase , single arm carbon nanotubes in the PEO phase . The addition of multi-walled carbon nanotubes , a greater impact , chloroform annealing of the film and more into a ball , while toluene atmosphere processing block copolymers tend to form a layered structure , multi-walled carbon nanotubes distributed in the PEO phase and the layered structure attachment multi-walled carbon nanotubes are grown , i.e. , under an atmosphere of toluene , multi-wall carbon nanotubes easier to induce PS-PEO , block copolymers self-assembled into regular layered structure .

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