Mechanical and chemical properties of thick hybrid sol–gel silica coatings from acid and base catalyzed sols
Source abstract
Abstract
Sol–gel silica hybrid coatings from acid and base catalyzed sols were examined. The sol precursors were tetraethyl orthosilicate (TEOS) and methyltriethoxysilane (MTES). It is generally accepted that the type of catalyst has a significant impact on the micro-structure of the resulting polysilicates. Weakly branched polymers are formed in acid catalyzed sols and highly branched, compact, particle like polymers are formed in base catalyzed sols. The mechanical and chemical properties of sol–gel derived silica coatings from acid and base catalyzed sols were studied as a function of the heat treatment temperature and time. Hardness and elastic modulus were measured by micro indentation measurements. The chemical composition of both types of coatings was characterized by X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (FTIR).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Silicone and Siloxane Chemistry · Polymer Nanocomposites and Properties · Electrophoretic Deposition in Materials Science
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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