Organic/inorganic colloids

A. Ayral, C. Guizard and L. Cot, Synthesis and application of hybrid organic-inorganic colloidal gels. /. Mater. Sci. Lett., 13 (1994) 1538. 

Multi-valent ions interact with organics, inorganic colloids and membranes. Real systems are very complex. An effort to simplify natural systems without losing important factors has been made and the systems were characterised thoroughly. 

In all of these applications the particles are soft and must be capable of forming a film at temperatures close to room temperature. In addition, they must display favorable interactions with the surface of the substrate on which they are applied. In this respect, a review of recent publications and patents showed that structured latex particles still represent an active area of research, the principal objective being to improve the performances of the coating formulation. Indeed, as will be illustrated below in the case of organic/inorganic colloids, structured latexes represent a possible means to overcome the usual compromises between a good film quality and optimal properties. 

Yin, Y. Alivisatos, A. P. 2005. Colloidal nanocrystal synthesis and the organic-inorganic interface. Nature 437 664-670. 

Van Moorleghem C, Six L, Degryse F, Smolders E, Merckx R. Effect of organic P forms and P present in inorganic colloids on the determination of dissolved P in environmental samples by the diffusive gradient in thin films technique, ion chromatography, and colorimetry. Anal. Chem. 2011 83 5317-5323. 

Chemistry is involved at every stage of the process, including the chemistry of inorganic pigments and organic resins, colloid and surface chemistry, as well as elements of environmental and analytical chemistry. The Chemistry of Paper provides an informative and entertaining overview of the chemical principles involved. It will be especially suitable to students and others who require an introduction to the chemistry of paper manufacture. 

The effect that hydrophobic organic substances can become sorbed to organic coatings can be used to make sorbents by coating inorganic colloids such as ferri-hydrite with surfactants. Such surfactant-coated surfaces contain films of hemicelles (see 4.5) which are able to remove hydrophobic solutes, such as toluene or chloro-hydrocarbons, from solution (Holsen, et al., 1991). 

Colloids are suspended particles in a solution medium and will not settle out over time. They are common in natural waters and can enhance the apparent solubility of a wide range of water pollutants, both organic and inorganic. Colloids maybe considered as an extension of the solid and aqueous phases and are formed by conditions that can be quite variable in time and space hence colloids can be dynamic. The composition of colloids can vary with the composition of the solid and aqueous phases. Colloids can be made up of organic, inorganic, or a mixture of materials. 

Colloids Organic Colloids Inorganic Colloids iron oxyhydroxides... 

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