Table of Contents
What is nano-silica?
Silicon dioxide nanoparticles, also known as silica nanoparticles or nano-silica, are the basis for a great deal of biomedical research due to their stability, low toxicity and ability to be functionalized with a range of molecules and polymers.
How is nano-silica made?
By reacting 1 kg of sulphuric acid 3M with 190 g of Olivine at 90°C in a stirred reactor 65 g of nano-silica is produced. The features of the silica produced are a specific surface area of 100-500 m²/g, a mean particle size of 5-20 nm and specific surface area in micropores of 20- 200 m²/g [1][2].
Is nano silica coating safe?
The European Commission’s Scientific Committee on Consumer Safety (SCCS) has found that there is inadequate data to conclude that the use of nano-silica in cosmetics is safe.
Is nano silica toxic?
The unique physico-chemical properties of nano-sized silica that make them attractive for industry may present potential hazards to human health, including an enhanced ability to penetrate intracellular targets in the lung and systemic circulation.
What is meant by nano concrete?
Nanoconcrete (also spelled nano concrete or nano-concrete) is a form of concrete that contains Portland cement particles that are no greater than 100 μm and particles of silica no greater than 500 μm, which fill voids that would otherwise occur in normal concrete, thereby substantially increasing the material’s …
What is ceramic nano coating?
Nano coatings, or ceramic coatings as they’re commonly known, are liquids which, when applied to a vehicle’s paintwork, fuse with the surface to form a glossy, long-lasting barrier that repels water, contaminants and often UV rays.
Is nano-silica coating safe?
Where can silica be found?
An abundant natural material, crystalline silica is found in stone, soil, and sand. It is also found in concrete, brick, mortar, and other construction materials. Crystalline silica comes in several forms, with quartz being the most common.
What is the application of nanotechnology in concrete?
Nanotechnology improves the bulk property of concrete, helps to obtain thinner final products, faster setting time and lowered levels of environmental attack. Some of the novel advancement on nanotechnology is its ability to use marginal and recycled materials.