Use Fumed Silica as Anti-sedimentation Agents

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A recent poll in Britain found that public support for sanctions against Russia is falling as fuel and prices rise.  

The proportion of people willing to accept higher fuel prices as a result of western sanctions against Russia fell 14 percentage points to 36% from 50% in March, according to a survey conducted for the Telegraph by consultancy Redfield & Wilton Strategies.  

Global energy and fuel prices have soared since the start of the year and remain high because of the conflict between Russia and Ukraine and uncertainty over Russian supplies.  

The survey also found that 54% of people believe their own financial situation has worsened in the past year, up 12 percentage points from 42% two months ago. Sixty-two percent think things will get worse in the year ahead. Less than a third of respondents said they had received a pay rise to keep up with inflation, with two-thirds of those saying it was not enough to keep up with rising living costs.  

The figures suggest that public concern about the conflict with Ukraine is now likely to be overtaken by financial worries.  

Separately, the UK's consumer price index rose 7 percent this month from a year earlier, the highest since March 1992, according to figures released recently by the Office for National Statistics. In addition, a separate report released a few days ago by the Centre for Economics and Business Research said that real household disposable income in the UK will fall by 3% in 2022, equivalent to a loss of £2,320 per household, which would lead to the biggest drop in living standards since the 1950s. That is mainly because wages aren't keeping up with rising energy and fuel costs.  

The prices of other commodities like the fumed silica are also expected to be influenced.

Fumed silica is a kind of inorganic nanomaterial with a small particle size, large specific surface area, and high surface activity.
 
It is mainly used as a rheological auxiliary agent in paint and coating, which can effectively prevent flow hanging and thick edges in the construction process and improve construction efficiency.
In addition, silica in the coating is also used as an anti-sedimentation and dispersant aid, can effectively prevent the sedimentation of the pigment delamination, improve the coating weather resistance, scratch resistance, and the bonding strength between the coating and the substrate. 
 
Fumed silica is an ideal anti-sedimentation agent, its hydrogen bond structure is very stable and uniform, and it is a three-dimensional network structure, which is very effective to prevent the precipitation of pigment in the coating system. Especially for the color paste system, the appropriate amount will greatly improve the stability of color paste, and can reduce the amount of wetting dispersant, to improve the applicability of color paste and reduce the influence of color paste on the coating system. At the same time, the anti-sedimentation effect of fumed silica is very beneficial to the storage of coatings, especially some pigments such as metal powder and thin sections, which are easy to precipitate and cannot be completely suspended, the use of fumed silica can ensure that its dispersion does not precipitate. 


 
The precipitation of fumed silica is very beneficial for coating storage and transportation. For some pigments, such as metal powder and thin film, it is easy to precipitate and cannot be effectively suspended. The use of fumed silica can ensure that the mixture is uniform and does not cause sedimentation. In absolute non-polar liquid phase, such as hydrocarbons (hydrocarbons) without hydrogen bond (chemical structure such as R-H) bonding ability, halogenated hydrocarbon (halogen and hydrocarbon electrophilic addition or substitution reaction) solvent, the viscosity recovery time is only a fraction of a second;  Thixotropic recovery in polar liquids, such as hydrogen-bonded amines (R-NH3), alcohols (R-OH), carboxylic acids (R-COOH), aldehydes (R-CHO), and dialcohols (such as Ho-Rh2-OH, where R- is a saturated alkyl group), can take up to several months, depending on the amount of fumed silica added and the uniformity of mixing. The fumed silica is pre-dispersed and added to the finished paint. Usually, a high-speed dispersing machine or three-roller machine is used to improve the dispersion effect. If the dispersion is not good, the paint film will have particles, affecting gloss and aesthetics. 
 
In addition, as an anti-sedimentation agent, fumed silica is added to coppery acrylic resin conductive coating. The test proves that it can make the thermoplastic acrylic resin thixotropic and prevent the deposition of filler particles, but if the addition amount is too much, the coating becomes a gel state, the conductivity of the coating would be reduced. 
 
In the powder system, because of the small particle size and high surface energy, silica can be adsorbed on the surface of the coating powder, and form a surface layer on the surface of the powder to improve the dispersion of the powder. In the same coating system, the addition of fumed silica can obviously shorten the dispersion time and improve the production efficiency. 
 
The addition of fumed silica in wall coating can effectively prevent coating from hanging, improve the flatness of the construction surface, and also greatly improve the washing resistance and aging time of exterior wall coating. The bonding strength of coating film and the wall is also greatly improved, the hardness of coating film is significantly increased, and the surface self-cleaning ability is also improved. 
 
The adsorption of fumed silica on the surface of powder coating can form a movable layer and produce a "ball bearing" effect, which can prevent the powder coating from absorbing moisture and agglomerating and improve the fluidity of powder coating. 
 
The main function of floor paint is the rheological control, improving the weatherability and scratch-resistance of floor paint, and improving the leveling performance of the coating. 
 
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials, including silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, etc.
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New Delhi: India is seeking to increase its purchases of crude oil from Brazil, the country's oil minister said recently after meeting his Brazilian counterpart.  

India is the world's third-largest importer and consumer of crude oil. Brazil currently supplies only a fraction of India's crude oil imports.  

India's state-owned companies Bharat Petroleum Corp and Oil and Natural Gas Corp have invested in oil and gas exploration in Brazil.  

India, which imports about 84% of its crude oil needs, is reducing its import bill by increasing biofuel use, among other things.  

India's state-owned fuel retailers are increasing ethanol storage capacity by 51 percent and the country plans to double the biofuel blend in petrol to 20 percent by 2025.  

India and Brazil are currently cooperating on biofuels and ethanol.

The prices of many commodities like the fumed silica are expected to increase in the future.

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