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Macroporous Polytetrafluoroethylene Film with a Reusable Matrix and Its Application as the Microreactors
Author(s) -
Wang Yunlong,
Zhao Chi,
Wang Mozhen,
Wu Qichao,
Zhou Xiao,
Ge Xuewu
Publication year - 2016
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201500393
Subject(s) - materials science , polytetrafluoroethylene , aqueous solution , chemical engineering , polystyrene , composite number , acrylic acid , microreactor , microparticle , colloid , bead , nanoparticle , polymer chemistry , composite material , polymer , nanotechnology , copolymer , organic chemistry , catalysis , chemistry , engineering
This work reports a simple and efficient preparation method of an inverse‐opal‐like macroporous polytetrafluoroethylene (IO‐PTFE) film with a reusable matrix. At first, the pH‐responsive poly(acrylic acid) (PAA) is grafted on the PTFE latex particles induced by γ‐ray radiation. The stability of PAA grafted PTFE latex particles (PTFE‐ g ‐PAA) in water decreases in acid aqueous solution. As a result, PTFE‐ g ‐PAA particles can coprecipitate with monodispersed polystyrene (PS) microspheres from the acidic aqueous dispersion to form a composite particulate film. After the composite particulate film is etched with toluene to remove PS microspheres, a self‐stand inverse‐opal‐like macroporous PTFE film can be successfully obtained. The macroporous PTFE film can be applied as the microreactor to synthesize uniform TiO 2 particles. The separation of TiO 2 microparticles and the recycle of PTFE‐ g ‐PAA particles can be simultaneously achieved simply in water by means of ultrasonification. The prepared TiO 2 microparticles also show good photocatalytic performance. This work opens a new thought to prepare special macroporous polymeric materials, and expands the microsynthesis of inorganic or organic microparticles by taking advantage of polymeric macroporous materials.