碳納米管的包覆及其對聚合物復合材料的性能調(diào)控
[Abstract]:Encapsulated multi-walled carbon nanotubes (Coated Multi-Wall Carbon Nanotubes), as a kind of one-dimensional core-shell nano-materials, has been endowed with new properties and functions of (MWNTs). CMWNTs can be used as a new type of support catalyst and electrode material. It can also be used as a new type of nano-filler to improve the mechanical, thermal and electrical properties of composites, which has important practical value and research significance. In this paper, boron nitride coated multi-walled carbon nanotubes (BN@MWNT) with high thermal conductivity, barium titanate coated multi-walled carbon nanotubes (BTO@MWNT) and nickel coated multi-walled carbon nanotubes (Ni@MWNT) were prepared by improving the traditional impregnation method and electroless plating method. The main work is as follows: 1. By adding sodium dodecylbenzene sulfonate (SDBS) into the traditional boron nitride impregnation solution, the surface of BN@MWNT, coating with controllable coating thickness is obtained, and the thickness is more than 10 nm. The coarse and thicker BN coating makes BN@MWNT have better thermal conductivity than MWNTs. The thermal conductivity of wt% / PVDF composites reached 1.359 W / moK.2. the impregnation effect of different surfactants on MWNTs sol-gel (sol-gel) solution was studied. In the absence of surfactant, only a small number of barium titanate particles adhered to the surface of MWNTs after sintering of barium titanate sol-gel solution with small amount of adhesion on the carbon tube. When cetyltrimethylammonium (CTAB) was added to the impregnation solution, a large number of barium titanate was obtained after impregnation and sintering, and SDBS was added to the impregnation solution to obtain the continuous distribution of barium titanate on the surface of MWNTs. This is due to the decrease of surface energy due to the formation of conjugation between SDBS and MWNTs, which enables MWNTs to adhere to a large number of dipping solutions. Polymethyl acrylate coated multi-walled carbon nanotubes (PMA@MWNT) were prepared by free radical in-situ polymerization, which can be used as high performance dielectric filler in acid solution. It can replace acidified MWNTs. commonly used in electroless plating. Nickel coated multiwalled carbon nanotubes (Ni@MWNT) were prepared by controlling the plating time and can be used as high dielectric fillers.
【學位授予單位】:北京化工大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TQ127.11;TB383.1
【共引文獻】
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