New fluoroalkyl end-capped vinyltrimethoxysilane oligomer - ionic liquid silica nanocomposites were prepared by sol-gel reaction of the corresponding oligomer in the presence of phosphorus-type ionic liquid : tri-n-butyl-[3-(trimethoxysilyl)propyl]phosphonium chloride under alkaline conditions. These fluorinated nanocomposites were found to apply to the surface modification of glass, and the modified glass surface exhibited a high oleophobicity imparted by fluoroalkyl groups in nanocomposites. Interestingly, this modified glass surface was found to show superhydrophilicity derived from hydrophilic cationic ionic liquid segments through the flip-flop motion between fluoroalkyl groups and the ionic liquid segments in nancomposites when the surface environment is changed from air to water.
A silicon polymer was synthesized by copolymerization of 1,4-bis(p-hydroxystryl)-2,5-dihethoxybenzene and dichlorodiphenylsilane. The molecular weights of the polymer was Mn=11000, Mw=19800, and Mw/Mn=1.8. The polymer was soluble in organic solvents such as chloroform, toluene and tetrahydrofuran (THF). In TGA measurements of the polymer, weight loss started at 380°C, which showed the polymer had a good thermal stability. The synthesized polymer showed photoluminescence peaks at 445 and 470 nm.
Appearance is one of the principal values of wood finishing. In this paper, we first explain the nature of wood substrate briefly, such as distinctively beautiful grains, sliced veneers, porosity, deformation by the moisture, and color changing. Next, as examples of basic furniture finishing process, oil finishing, polyurethane closed pour finishing, and lacquer antique finishing are described. Then, as to polished unsaturated polyester natural wood finishing, which shows the greatest transparency, substrate constructions, dye and pigment stains, unsaturated polyester resins, sanding, and polishing are explained.
The carbon family of materials has been one of the most studied in the last 20 years since the detection of carbon nanotubes and fullerenes and their resulting impact on the development of nanotechnology. These movements have definitely influenced fundamental studies in carbon blacks (CB), which have lead to the establishment of a new surface model and further understanding of the mechanism of CB formation. However, CB have long been in existence, and there is no doubt they are nanostructured carbon in origin. Furthermore, CB makers have continuously tuned the nanostructure of the CB (particle size, structure, and surface properties) to meet the market requirements, and reports of these activities can be found in rubber, paint and printing ink journals. In this paper, the author describes in some detail the manufacturing process, physical and chemical properties, and applications of CB. In addition, a guide to CB selection is summarized. Although this is far from a complete review, it is hoped that it will contribute to a better understanding of CB.
Water-borne coatings help to slash the emission of volatile organic compounds during coating process. Their developments, however, have frequently met serious problems as to their applicability and water-resistance because water has peculiar properties such as slow volatility and extremely high polarity. Since resins comprising water-borne coatings are usually organics, they form disperse system in water medium. The heterogeneity allows new design of resin from a stereoscopic viewpoint and of cross-linking system with the help of water, whereas water-borne resins, especially polyesters should be used with due attention to their hydrolytic stability. This article provides a perspective on design of water-borne resins and cross-linking system on the basis of our studies, together with trends in typical branches of water-borne coatings.