Functional Coatings and Microencapsulation: A General Perspective
By S. Ghosh. 2006
259 citations recorded by the source corpus.
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
Subfields: Biomedical Engineering, Food Science, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/1c05c36b6f703d4c8e472e6030af838c0019c620
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Citations in the corpus
- A review of microencapsulation methods of phase change materials (PCMs) as a thermal energy storage (TES) medium (2014, methodology): “2 illustrates the typical forms of microcapsules that depend mainly on the core material and the deposition process of the shell [13].”
- Microencapsulation of essential oils with biodegradable polymeric carriers for cosmetic applications (2014, background): “be divided into two major categories, namely chemical and physical methods; the latter one can be subdivided into physicochemical and physicomechanical techniques [6].”