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Polyamic acid: nanoprecipitation and electrophoretic deposition on porous supports

Polyamic acid: nanoprecipitation and electrophoretic deposition on porous supports Polyamic acid (PAA, a precursor of polyimide) was synthesized from 4,4′-oxydiphthalic anhydride and 4,4′-oxydianiline. PAA, dissolved in dimethylsulfoxide (DMSO), was precipitated into colloidal particles after its injection into acetone. The resulting particle size distribution was found to depend on aging time of PAA solutions, their concentration, and the manner in which the solutions were mixed with acetone. PAA particles of any size down to 10 nm appeared to be achievable by decreasing the acetone/DMSO ratio. Particles in DMSO/acetone suspensions were found to have a significant negative zeta potential. Therefore, there was no need to add organic bases to form PAA anions, in contrast to all previously published studies on the PAA electrodeposition. EPD was performed onto porous stainless-steel or alumina disks, which are suitable supports (reinforcements) for membranes. The slow evaporation of DMSO residue yielded dried polymer layers, comprised of 50–100 nm PAA globules. The outer surface of layers was usually covered with a very thin, continuous PAA skin. Such supported PAA layers—after a simple imidization step via a heat treatment—could be applied as thermally resistant membranes for gas separation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Coatings Technology and Research Springer Journals

Polyamic acid: nanoprecipitation and electrophoretic deposition on porous supports

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Publisher
Springer Journals
Copyright
Copyright © 2017 by American Coatings Association
Subject
Materials Science; Tribology, Corrosion and Coatings; Surfaces and Interfaces, Thin Films; Polymer Sciences; Industrial Chemistry/Chemical Engineering; Materials Science, general
ISSN
1547-0091
eISSN
1935-3804
DOI
10.1007/s11998-017-0004-9
Publisher site
See Article on Publisher Site

Abstract

Polyamic acid (PAA, a precursor of polyimide) was synthesized from 4,4′-oxydiphthalic anhydride and 4,4′-oxydianiline. PAA, dissolved in dimethylsulfoxide (DMSO), was precipitated into colloidal particles after its injection into acetone. The resulting particle size distribution was found to depend on aging time of PAA solutions, their concentration, and the manner in which the solutions were mixed with acetone. PAA particles of any size down to 10 nm appeared to be achievable by decreasing the acetone/DMSO ratio. Particles in DMSO/acetone suspensions were found to have a significant negative zeta potential. Therefore, there was no need to add organic bases to form PAA anions, in contrast to all previously published studies on the PAA electrodeposition. EPD was performed onto porous stainless-steel or alumina disks, which are suitable supports (reinforcements) for membranes. The slow evaporation of DMSO residue yielded dried polymer layers, comprised of 50–100 nm PAA globules. The outer surface of layers was usually covered with a very thin, continuous PAA skin. Such supported PAA layers—after a simple imidization step via a heat treatment—could be applied as thermally resistant membranes for gas separation.

Journal

Journal of Coatings Technology and Research – Springer Journals

Published: Dec 4, 2017

References

  • Thin Polyimide Layers—Preparation and Properties
    Assa, J; Spassova, E; Karamancheva, I; Dimitrova, T; Rangelov, N; Danev, G
  • Polyimide Multilayer Thin Films Prepared via Spin Coating from Poly(Amic Acid) and Poly(Amic Acid) Ammonium Salt
    Ha, Y; Choi, M-C; Jo, N; Kim, I; Ha, C-S; Han, D; Han, S; Han, M
  • Real-Time Optical Characterization of Surface Acoustic Modes of Polyimide Thin-Film Coatings
    Duggal, AR; Rogers, JA; Nelson, KA
  • Gas Separation of Asymmetric 6FDA Polyimide Membrane with Oriented Surface Skin Layer
    Niwa, M; Kawakami, H; Kanamori, T; Shinbo, T; Kaito, A; Nagaoka, S
  • Mixed Matrix Membranes Based on 3-Aminopropyltriethoxysilane Endcapped Polyimides and Silicalite-1
    Frycova, M; Sysel, P; Kocirik, M; Brabec, L; Hrabanek, P; Prokopova, O; Bernauer, B; Zikanova, A
  • Synthesis, Characterization and Hydrolytic Stability of Poly (Amic Acid) Ammonium Salt
    Cai, D; Su, J; Huang, M; Liu, Y; Wang, J; Dai, L
  • Electrolytically Formed Polyimide Films and Coatings: I. Electrodeposition from Colloidal Dispersions
    Phillips, DC
  • Electrodeposition of Polymers from Nonaqueous Systems. I. Polyimides: Some Deposition Parameters
    Alvino, WM; Scala, LC
  • Electrophoretic Deposition of Polymers. II. Polyimides: A Coulombic Study
    Alvino, WM; Fuller, TJ; Scala, LC
  • Electrodeposition of Polyimides from Nonaqueous Emulsions
    Uebner, M; Ng, KM
  • Studies on the Electrodeposition of Polyimides
    Yang, C-P; Chen, Y-H
  • Polymeric Materials for Electronics Packaging and Interconnection
    Buchwalter, SL
  • Surface Properties of Carbon Fibres Modified by Electrodeposition of Polyamic Acid
    Iroh, JO; Yuan, W
  • Electrodeposition of BTDA-ODA-PDA Polyamic Acid Coatings on Carbon Fibers from Nonaqueous Emulsions
    Chen, Y; Iroh, JO
  • Polyimide Nano-Coating on Carbon Fibers by Electrophoretic Deposition
    He, S; Zhang, S; Lu, C; Wu, G; Yang, Y; An, F; Guo, J; Li, H
  • Poly(Amic Acid)–Clay Nacrelike Composites Prepared by Electrophoretic Deposition
    Wang, C-A; Long, B; Lin, W; Huang, Y; Sun, J
  • Preparation, Characterization, and Properties of Polyamic Acid Nano-Emulsion
    Ding, F; Tong, Y; Luo, X; Guan, H; Hu, B
  • Surfactant Free Fabrication of Polyimide Nanoparticles
    Xiong, JY; Liu, XY; Chen, SB; Chung, TS
  • Preparation of Submicrometre Polyimide Particles by Precipitation from Solution
    Lin, T; Stickney, KW; Rogers, M; Riffle, JS; McGrath, JE; Marand, H; Yu, TH; Davis, RM
  • Phase Behavior and Mechanism of Membrane Formation for Polyimide/DMSO/Water System
    Kim, JH; Min, BR; Won, J; Park, HC; Kang, YS
  • Ultrasonic Velocity of Binary Mixtures of Acetone and Dioxane with Dimethylsulphoxide as One Component
    Syal, V; Chauhan, S; Kumari, U
  • A Method to Break Charge Transfer Complex of Polyimide: A Study on Solution Behavior
    Ke, F; Song, N; Liang, D; Xu, H
  • Polyamic Acids and Polyimides: Synthesis, Transformations, and Structure
    Magarik, SY
  • Controlling Surface Roughness in Vapor-Deposited Poly (Amic Acid) Films by Solvent-Vapor Exposure
    Anthamatten, M; Letts, SA; Cook, RC
  • Formation of Spherical Nanoparticles in Poly(Amic Acid) Films
    Ogura, T; Saito, Y; Higashihara, T; Ueda, M
  • Effect of Poly (Amic Acid) Imidization on Solution Characteristics and Membrane Morphology
    Lee, H; Won, J; Park, H; Lee, H; Kang, Y
  • Synthesis of Cost-Effective Porous Polyimides and Their Gas Storage Properties
    Luo, Y; Li, B; Liang, L; Tan, B