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Multi-Function Integrated Layer-by-Layer Assembled Multilayer Films

Author: ZhangLianBin
Tutor: ShenJiaZuo；SunJunQi
School: Jilin University
Course: Polymer Chemistry and Physics
Keywords: Layer-by-layer Assembly Membrane material silicate Nanoparticles Superhydrophobic Porous membrane Alternating deposition Material preparation techniques Polymer composite Polyelectrolyte composite Porous Polycationic Multi-layer film technology Antireflection coating Silane coupling agent Porous titania Film Surface with layer Solution
CLC: TB383.2
Type: PhD thesis
Year: 2010
Downloads: 354
Quote: 1
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Abstract


As the layers of assembly technology (Layer-by-layer assembly technique) than 20 years of development, as a simple, effective membrane materials preparation technology has been widely accepted. Layer Assembly of the many advantages of the technology, such as the large area of ??the non-planar substrate preparation of multilayer films, the structure of the membrane material composed of regulation are other membrane materials preparation technology can not match. Therefore, the layers of assembly techniques give full play to advantages in the preparation of the multilayer film materials for the preparation of functional membrane material significance major. More important is the assembly technique layers can be easily build by changing the types of primitives and the multilayer film deposition process and combined with the post-processing means to facilitate the regulation of membrane material chemical composition and microstructure, which also obtained PACK kinds of functions in a multi-layer film material may be provided. The purpose of this paper is to use layers of assembly technology build multilayers flexibility and membrane materials combined with the multilayers after treatment method for preparing a multi-in-one, including the following three aspects: (1) polycation PDDA and sodium silicate sodium silicate on the surface of the substrate covered by the SiO2 microspheres having a micron-scale structures alternating deposition, the surface of the composite structure having a micro-nano through the low surface energy, a fluorine-containing silane coupling agent modified, obtained the roll angle to 3 ° contact angle of 157 ° superhydrophobic surface; the next further extended to the preparation of superhydrophobic surfaces with super-hydrophobic nature of near-infrared less reflective film preparation, and proved superhydrophobic the introduction of performance can effectively inhibit the porous membrane for water vapor absorption, thus ensuring the near-infrared such a porous antireflection film performance in the relative humidity of the environment of use. (2) the use of polycations PDDA silicate silicate with positively charged polyelectrolyte complexes formed with polyacrylic acid PAA alternately deposited after removal of the organic components in the film, after calcination, we obtained having a high mechanical stability of the anti- fog antireflection film material. (3) the use of rigid build the primitives alternating deposition of TiO2 nano-particles and silicate silicate and non-drying employed in the preparation process of the multilayer film deposition process to obtain a multilayer film having a highly porous structure silicate/TiO2 this height the porous silicate/TiO2 of film material can be used as a coating type adsorbent used in the adsorption of the cationic dye in water pollutants the dye adsorbed multilayer film can be easily restored by UV irradiation reproduction, and can be used repeatedly. In addition, in situ AFM studies have shown that using such non-dried layers of the assembly process as well as a rigid construct primitives on the porous silicate/TiO2 multilayer film forming process in the layers of the assembly process for overcoming the self-consistent role, to form a highly porous structure is essential. This study also direct access to a porous membrane material by layer assembly method provides a new way.

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