Preparation of Microcapsules Containing Two-Phase Core Materials
Citations Over TimeTop 18% of 2004 papers
Abstract
Urea-formaldehyde (UF) microcapsules containing two-phase core materials in which phthalocyanine blue BGS (beta-CuPc) particles were homodispersed in tetrachloroethylene (TCE) were prepared by in situ polymerization. The effects of the various process parameters, including the type of surface modifier, the viscosity of UF prepolymer, the type of water-soluble surfactant, and the concentration of oil-soluble surfactant in the capsule core on the dispersity of beta-CuPc particles in TCE and the properties of the capsule wall and the adsorption of beta-CuPc particles on the internal surface of capsule wall were experimentally investigated. It was shown that using octadecylamine (ODA) to modify beta-CuPc particles resulted in a significant increase of the dispersing extent (DE) and the electrophoresis velocity of the particles in TCE (about 4 and 20 times more than that of unmodified). In addition, the optimal reaction conditions of the synthesis UF prepolymer were obtained by the orthogonal test. On the other hand, as the oil/water interfacial tension of emulsion was big enough, the microcapsule formed. The concentration of Span-80 in TCE was no less than 0.062 mM; the adsorption of beta-CuPc particles on internal surface of wall were restrained. Finally, the microcapsules in which beta-CuPc particles possess reversible response to dc electric field were obtained.
Related Papers
- → Effects of SiC contents on the microstructure and mechanical properties of Al4SiC4–SiC ceramic composites(2023)6 cited
- → Nanocrystalline NiAl-TiC Composites Sintered by the Pulse Plasma Method(2006)1 cited
- Susquehanna Chorale Spring Concert "Roots and Wings"(2017)
- → Porous SiC Ceramics with Multiple Pore Structure Fabricated via Gelcasting and Solid State Sintering(2016)
- → Retracted: XRD Peak Profile Analysis of SiC Reinforced Al2O3 Ceramic Composite Synthesized by Electrical Resistance Heating and Microwave Sintering: A Comparison(2023)