Microencapsulation of TiO<sub>2</sub>Nanoparticles with Polymer by Rapid Expansion of Supercritical Solution

Matsuyama, Kiyoshi; Mishima, Kenji; Hayashi, Ken’ichiro; Matsuyama, Hideto

doi:10.1023/a:1024421514009

Cited by 27 publications

(16 citation statements)

References 15 publications

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“…One drawback of this approach is that the nanoparticles often aggregate within the polymer thereby reducing the effective surface area [11]. Other approaches have involved using polymer synthesized by emulsion polymerization to encapsulate inorganic or metallic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Coutinho

Gupta

2007

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Coutinho

Gupta

2007

Journal of Colloid and Interface Science

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“…Kiyoshi et al had very recently carried out microencapsulation of TiO 2 nanoparticles with polymer by RESS using ethanol as a nonsolvent for the polymer shell such as polyethylene glycol (PEG), poly(styrene)-b-(poly(methylmethacrylate)-copoly(glycidal methacrylate) copolymer (PS-b-(PMMA-co-PGMA) and poly(methyl methacrylate) [102].…”

Section: Rapid Expansion Of Supercritical Solutionmentioning

confidence: 99%

Functional Coatings and Microencapsulation: A General Perspective

Ghosh¹

2006

Functional Coatings

159

130

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Today, many objects that we come across in our daily lives, including the house in which we live and the materials we use (e.g., toothbrushes, pots and pans, refrigerators, televisions, computers, cars, furniture) all come under the "umbrella" of coated materials. Likewise, fields such as military applications -for example, vehicles, artilleries and invisible radars -and aerospace products such as aircraft, satellites and solar panels all involve the widespread use of coated materials. Clearly, the importance of coatings has increased hugely during the modern era of technology.Coating is defined as a material (usually a liquid) which is applied onto a surface and appears as either a continuous or discontinuous film after drying. However, the process of application and the resultant dry film is also regarded as coating [1]. Drying of the liquid coating is mostly carried out by evaporative means or curing (cross-linking) by oxidative, thermal or ultraviolet light and other available methods. Paint can be defined as a dispersion that consists of binder(s), volatile components, pigments and additives (catalyst, driers, f low modifiers) [2]. The binder (polymer or resin) is the component that forms the continuous film, adheres to the substrate, and holds the pigments and fillers in the solid film. The volatile component is the solvent that is used for adjusting the viscosity of the formulation for easy application. Depending on their compositions, paints can be divided into three groups: solvent-borne, water-borne and solvent-free (100% solid). Solvent-borne paints consist of resin, additives and pigments that are dissolved or dispersed in organic solvents. Similarly, in water-borne paints the ingredients are dispersed in water. In solvent-free compositions, the paints do not contain any solvent or water and the ingredients are dispersed directly in the resin.The properties of coating films are determined by the types of binders, pigments and miscellaneous additives used in the formulation. Moreover, types of substrates, substrate pretreatments, application methods and conditions of film formation

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“…The first to use a RESS process for coating reasons were Debenedetti et al [12] in 1993, using SC-CO 2 as solvent, while the carrier material was agitated in a stirred tank reactor. Since then, different alternatives have been developed, such as rapid expansion from supercritical solution with a nonsolvent (RESS-N) [13,14]. Because of the low solubility of the most part of polymers in SC-CO 2 , cosolvents are used to enhance solubility of the polymer in the supercritical fluid.…”

Section: Ress Applications In Coating Processesmentioning

confidence: 99%

RESS process in coating applications in a high pressure fluidized bed environment: Bottom and top spray experiments

Rodríguez‐Rojo

Marienfeld

Cocero

2008

Chemical Engineering Journal

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Microencapsulation of TiO₂Nanoparticles with Polymer by Rapid Expansion of Supercritical Solution

Cited by 27 publications

References 15 publications

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Functional Coatings and Microencapsulation: A General Perspective

RESS process in coating applications in a high pressure fluidized bed environment: Bottom and top spray experiments

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Microencapsulation of TiO2Nanoparticles with Polymer by Rapid Expansion of Supercritical Solution

Cited by 27 publications

References 15 publications

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Formation and properties of composites based on microgels of a responsive polymer and TiO2 nanoparticles

Functional Coatings and Microencapsulation: A General Perspective

RESS process in coating applications in a high pressure fluidized bed environment: Bottom and top spray experiments

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Product

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Microencapsulation of TiO₂Nanoparticles with Polymer by Rapid Expansion of Supercritical Solution