The Effect of Surface Treatment of Magnetite Powder on a Structure of Composite Particles Prepared by Suspension Polymerization

Sawatari, Norio; Fukuda, Makoto; Taguchi, Yoshinari

doi:10.1252/jcej.37.731

Cited by 11 publications

(11 citation statements)

References 10 publications

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“…A solvent evaporation method (SE method) was adopted to fabricate PE-based hybrid particles Chemical Industries, Ltd.) or Triton X-100 (4-(C 8 H 17 )C 6 H 4 (OCH 2 CH 2 ) 10 OH, HLB value = 13.5, Wako Pure Chemical Industries, Ltd.) kept around 348 K, which was higher than the cloud points of these two surfactants. Namely, the composition of raw chemicals was controlled to be 45000 parts of deionized water, 225 or 450 parts of Triton X-114 or Triton X-100, 1000 parts of a cyclohexane-heptane mixed solvent, x (x = 0, 10, 30, 50 and 70) parts of ST-1 or ST-5 powder, and 100 parts of PE powder on a basis of weight of chemicals.…”

Section: Fabrication Of Pe-based Particles By Using a Solvent Evaporamentioning

confidence: 99%

“…Consequently, special attentions have been focused on developing new preparation conditions of such polymer-based hybrid particles so as to fabricate final products with excellent properties [9][10][11][12][13][14]. Among several techniques and methods so far reported for the conventional polymer-based hybrid particles, a solvent evaporation method is of interest from the viewpoint of simplicity of the preparation process [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of polyethylene-based hybrid particles by an environmentally-friendly and aqueous solvent evaporation method

Kimura

Hyodo

Shimizu

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The present paper reports preparation procedure and characterization of micrometer-sized polyethylene (PE)-based hybrid particles containing various amounts of Mg(OH) 2 powder treated with different amounts of methylhydrogen polysiloxane (MHS). The PE-based hybrid particles were fabricated by an environmentally-friendly and aqueous solvent evaporation method by employing different kinds of surfactants. The shape, microstructure and other properties of the resultant PE-based hybrid particles were dependent markedly on the changes in composition of raw materials, especially for the amount of MHS used for the treatment of Mg(OH) 2 and the kind of surfactant. The particles fabricated by using 1 wt% MHS-treated Mg(OH) 2 (ST-1) powder and polyoxyethylene (10) octylphenyl ether (Triton X-100) as a surfactant showed spherical shape and their primary particle sizes were about 4 -10 µm, irrespective of the additive amount of ST-1 powder.These particles showed superior properties in terms of the actual content of MHS-treated Mg(OH) 2 powder incorporated inside the hybrid particles, particle size distribution and particle shape, in comparison with other particles fabricated by using 5 wt% MHS-treated Mg(OH) 2 (ST-5) powder and polyoxyethylene (8) octylphenyl ether (Triton X-114) as a surfactant. This is due to good affinity (average contact angle was 19.4°) between the ST-1 powder and the aqueous phase, i.e. a continuous phase, dissolving Triton X-100. Furthermore, a composite fabricated by employing these PE-based hybrid particles showed uniform and homogeneous distribution of ST-1 powder in the PE matrix.

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Section: Fabrication Of Pe-based Particles By Using a Solvent Evaporamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of polyethylene-based hybrid particles by an environmentally-friendly and aqueous solvent evaporation method

Kimura

Hyodo

Shimizu

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Until now, the various fine inorganic and organic solid particles have been microencapsulated by the chemical methods such as the suspension polymerization method, the miniemulsion polymerization method, the soap‐free emulsion polymerization method, and the dispersion polymerization method, and by the physicochemical methods such as the coacervation method and the drying‐in‐liquid method …”

Section: Introductionmentioning

confidence: 99%

Microencapsulation of phosphor particles with the drying‐in‐liquid method in parallel with the suspension polymerization method and effect on afterglow luminance property

Taguchi

Itô

Saito

2017

Polymers for Advanced Techs

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Strontium aluminate particles as phosphor particles were microencapsulated with the drying‐in‐liquid method in parallel with the suspension polymerization method in order to increase the waterproof and to improve afterglow luminance property. In this study, ethylene glycol was used as the continuous phase instead of water to prevent phosphor particles from deteriorating at the microencapsulation process, and polystyrene was used as the more hydrophobic microcapsule shell. Styrene monomer was used as the solvent of polystyrene at the drying‐in‐liquid method and as the polymerizable monomer at the suspension polymerization method at the same time. The content and the waterproof could be considerably increased with the drying‐in‐liquid method in parallel with the suspension polymerization method as compared with only the drying‐in‐liquid method, because the denser microcapsule shell without any tiny holes and cracks could be formed. The decrease due to water in brightness of afterglow luminance of phosphor particles could be prevented by microencapsulating with the drying‐in‐liquid method in parallel with suspension polymerization method. Copyright © 2017 John Wiley & Sons, Ltd.

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“…Various fine solid particles have been microencapsulated by the chemical methods such as the suspension polymerization method [5] , the miniemulsion polymerization method [6][7][8][9][10][11][12] , the soap free emulsion polymerization method [13][14][15] and the dispersion polymerization method [16,17] and by the physicochemical methods such as the coacervation method [18] and the dryingin-liquid method [19] .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of microcapsules containing particulate phosphorescent agent with suspension polymerization

Taguchi

Itô

Saito

et al. 2016

Polymers for Advanced Techs

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Microcapsules containing particulate phosphorescent agent (strontium aluminate) were prepared by the suspension polymerization method and characterized about a few items such as the mean diameters, the content, the inner structure and the afterglow luminance property. Furthermore, the fundamental experiments were conducted to investigate how the dispersing feature of particulate phosphorescent agent affects the afterglow luminance property. In the experiment, the concentration of oil soluble surfactant, the crosslinking agent species, the added weight of the phosphorescent agent and the pre‐bulk polymerization time were mainly changed stepwise. Afterglow luminance of particulate phosphorescent agent gradually decreased with the afterglow time and considerably decreased because of soaking them in water. Decline of afterglow luminance because of soaking in water could be prevented by microencapsulation. Afterglow luminance of the multicore type microcapsules was found to be higher than that of the core–shell type microcapsules. The content of particulate phosphorescent agent could be increased by performing pre‐bulk polymerization and increasing the concentration of the oil soluble surfactant. Copyright © 2016 John Wiley & Sons, Ltd.

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The Effect of Surface Treatment of Magnetite Powder on a Structure of Composite Particles Prepared by Suspension Polymerization

Cited by 11 publications

References 10 publications

Preparation and characterization of polyethylene-based hybrid particles by an environmentally-friendly and aqueous solvent evaporation method

Preparation and characterization of polyethylene-based hybrid particles by an environmentally-friendly and aqueous solvent evaporation method

Microencapsulation of phosphor particles with the drying‐in‐liquid method in parallel with the suspension polymerization method and effect on afterglow luminance property

Preparation and characterization of microcapsules containing particulate phosphorescent agent with suspension polymerization

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