Preparation of Polymer Composite Particles by Phase Separation Followed by Suspension Polymerization

The present work reports a simple and effective way to produce hydrophobic foams with polyvinylidene fluoride (PVDF) and TiO2 by using a phase separation technique. This method involved the phase separation during the deposition of PVDF from its DMF solution with nonsolvent water in the presence of TiO2. The surface morphology of hydrophobic surfaces was characterized by Field Emission Scanning Electron Microscope (FESEM). The maximum water contact angle of 129° was observed. The results confirm that the surface texture of polymer composite exhibits mixture of microporous and nanoporous structure. The impact of TiO2 on the wettability property of polymer composite has been studied. The proposed methodology might find applications in the preparation of hydrophobic surfaces for industrial applications.

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Magnetorheological Characterization of Polymer-Iron Composite Suspensions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.1201 ◽

2004 ◽

Vol 449-452 ◽

pp. 1201-1204 ◽

Cited By ~ 8

Author(s):

Min Seong Cho ◽

Hyoung Jin Choi

Keyword(s):

Magnetic Field ◽

Parallel Plate ◽

Suspension Polymerization ◽

Measuring System ◽

Composite Particles ◽

Dispersed Phase ◽

Mr Fluids ◽

Polymerization Method ◽

Mr Characteristics

Composite particles (CIPMMA) of carbonyl iron (CI) and poly (methyl methacrylate) (PMMA) were prepared by a suspension polymerization method using CI dispersions in MMA monomer, and these were adopted as dispersed phase of magnetorheological (MR) fluids. The CIPMMA can resolve several problems of MR fluids having CI alone such as severe sedimentation and poor dispersion stability. Flow and viscelastic properties of the MR fluids were analyzed via a rotational rheometer equipped with a magnetic field supplier using measuring system of a parallel plate. The MR characteristics like yield stress were affected by the CI contents in the composite particles.

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Phase separation in the formation of hollow particles by suspension polymerization for divinylbenzene/toluene droplets dissolving polystyrene

Colloid & Polymer Science ◽

10.1007/s00396-002-0748-2 ◽

2003 ◽

Vol 281 (2) ◽

pp. 123-129 ◽

Cited By ~ 37

Author(s):

Yuichiro Konishi ◽

Masayoshi Okubo ◽

Hideto Minami

Keyword(s):

Phase Separation ◽

Suspension Polymerization ◽

Hollow Particles

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Preparation and Photocatalytic Properties of Fe-Doped TiO2 Nanocrystalline Composite Particles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.105-106.815 ◽

2010 ◽

Vol 105-106 ◽

pp. 815-818

Author(s):

Hai Da Liao ◽

Jin Lie Ma ◽

Jian Dai

Keyword(s):

Suspension Polymerization ◽

Sol Gel ◽

Average Particle Size ◽

Raw Material ◽

Composite Particles ◽

Average Particle ◽

Doped Tio2 ◽

Catalytic Activities ◽

Metatitanic Acid ◽

Nanocrystalline Composite

Metatitanic acid was adopted as the raw material to prepare Fe-doped TiO2 nanocrystalline composite particles using suspension polymerization and sol-gel method, which were then characterized with XRD, TEM, TG-DTA and IR, etc.. The results showed the samples were nanocrystal accumulated porous particles, with average particle size of 29nm. Through doping of Fe3+ ion, the photo catalytic activities of particles under Xe lamp were investigated by photodegrading the methyl orange. It was found that, the TiO2 nanocrystal doped with 0.5% Fe3+ ion (accounted as mass fraction) had the highest catalytic activity. The Fe-doped TiO2 nanocrystalline composite particles prepared in this study has high activity, is easy for separation, recovery and reuse.

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