Silicon algae mud is a new type of coating material that has emerged in the market in recent years, not only in a colourful and rich texture, but also in the form of commercial propaganda that can absorb harmful gases, such as formaldehyde, in the house and serve to purify the air. So, is silicate mosaic really such an environmentally friendly effect
The new room for ms. Chang shali began renovations in february this year. Having been told that the walls were environmentally friendly and could decipher formaldehyde, she decided to brush the whole house with silican mud and purchased a bulk of “silicate mashed” products on the internet at a cost of $40 per metre. But after brushing the wall, ms. Lee felt something wrong。
As a result of stenching, ms. Lee complained to the association of indoor environmental cleaning industries of hunan province, and to the 315-hour internal environment complaints station of the hunan consumer council, and invited professional inspectors for testing. The result was a surprise for ms. Lee。
Levels of 0. 132 mg, 0. 05 mg, 0. 036 mg and 0. 04 mg per cubic metre of formaldehyde, benzene, toluene and dibenzo-benzene were detected in ms. Lee's new room, and the levels of formaldehyde exceeded national standards. This puzzled ms. Lee. So, did li get a hypocritical silican mosaic product, or did silicon masturbation and decomposition of formaldehyde not work as well as the merchants promote? In response, journalists visited chang shado's building materials market。
How's silicon algae
Businesses say different things
Businesses differ as to the utility of silicate building materials paints, with commercials specialized in formaldehyde absorption, anticorrosy resistance and fire resistance as promotional outlets。
However, there are also vendors who suggest that the so-called “environmental efficacy” of silicate algae is not good。
What kind of substance is silicate
Dr. Duyu sung, a professor at the faculty of materials science and engineering of beijing industrial university, stated that silicate soil was the human remains of ancient silican algae, which had been accumulated over a long period of time and were hull-acting, and that the main component was silicate dioxide. The construction of silican algae soil, which is the raw material, is not in itself environmentally friendly if it is a formal product, since it contains a large number of fine “pores” and thus has strong physical adsorption and insulation. This was also confirmed by the journalists through experiments conducted by professional inspectors。
In order to verify the environmental performance of silicate mosaic products, journalists randomly sampled three of the most common silican mosaic products from the market and asked professional testing agencies for testing。
According to the test criteria, the detector covered a layer of silican algae on each of the three glass blocks and placed it in a dry tank at 20°c for 24 hours. Three glass plates with silicate mud and one blank glass plate were then placed in each of the four closed test modules. After 24 hours, gas is collected in the chamber and the contents of hazardous substances, such as formaldehyde and benzene, are analysed. Zheng ji, a senior tester, released the results to us。
Dr. Doo yu sung, professor, school of material science and engineering, beijing industrial university, has been conducting research on environmental purification materials based on porous minerals for many years。
He described silicate soil as mainly formed from the long-term accumulation of the remains of ancient silicate algae and the hues of the earth, the main component of which was silicate dioxide. Silicon algae mud, which is built on the walls of natural silicate soil as raw material, is itself environmentally sound. At the same time, it has its own special porosity structure, which allows it to have a larger surface area, strong physical adsorption performance and insulation, etc。
In order to verify this, the tester then placed the plate coated with silicate mud in a sealed chamber, then dripped into the formaldehyde solution, and soon the data from the formaldehyde reader rose rapidly. When the value rises to 0. 28, silicate mud multi-pore adsorption becomes visible and the value begins to decline slowly. It is precisely on the basis of its multi-hole adsorption properties that silican mosaics also have the ability to smoke, suck water, protect against accursion, and even mediate moisture。
In addition, silican mosaic is a heat-resistant conductor with a melting point of between 1,400 and 1650°c, with good heat resistance and high chemical stability, so it does have some fire resistance and temperature insulation。
Since silicate mud is an environmentally friendly building material, why does ms. Lee, a citizen of changsha, still feel stingy? Following an inspection of the room in question, the inspectors directed ms. Lee to replace silicate mud coatings and paint them again。
According to the inspectors, ms. Lee used another batch of silicate mud products to overwhelm the walls of her home and retest them
The indices for the four items of formaldehyde, benzene, toluene and diphenyl in the new room air are all in line with national indoor air quality standards. The tester noted that, after sampling analysis, it could be established that the silicate mud building materials previously used by ms. Lee were substandard products。
Journalists during the visit noted that, at present, silicate mosaic is not only used as a home building material, but is also the preferred option for public places and institutional renovations. The school building at the hunan changsha and lake upgrad experiment school is the interior wall renovation that is being carried out entirely using silican algae mud。
The use of silicate mud paint is so wide, how can citizens identify the purchase of regular products
Expert presentation, step 1: fire can be used。
Distinguished silican mud, step two, smell。
The third step is to spray water after the brush has been completed, and visual observations will reveal signs。
In addition, consumers may require the observation of samples of products under electronic microscopes when buying silican algae mud in shop. According to the china association of building and decoration materials, the market is currently mixed with silican masonry products, with uneven quality and the silican mashed industry as a whole is being regulated。
