-
2023-04-28 16:18:16
Public Domain Films: Many films come into the public domain after the copyright expires, which means they are no longer protected from unauthorized copying, distribution, or display. Films that are in the public domain can be freely accessed and watched on various websites, including YouTube and the Internet Archive.
-
2023-04-24 15:32:24
Polyether amine, also known as polyetheramine or PEA, is a highly versatile class of compounds that find a wide range of industrial applications. They are typically used as curing agents, crosslinkers, and base materials in a variety of industrial processes, including adhesives, coatings, resins, and composites.
-
2023-04-20 15:30:09
Polyether amine is a category of amine functionalized polyethers that are widely used in various industries. These are typically used as curing agents for epoxy and polyurethane adhesives, paints and coatings, and as polyol components for polyurethane elastomers and foams. These amine functionalized polyethers are synthesized through the ring-opening polymerization of a cyclic ether such as ethylene oxide and propylene oxide.
-
2023-04-16 09:32:23
Silicone rubber is a highly versatile material that has numerous applications across various industries. This material has become the ultimate choice for industrial applications because of several advantages that it offers. In this article, we will be discussing what makes silicone rubber the ultimate choice for industrial applications.
-
2023-04-12 16:58:02
In synthetic detergents, builders usually play the role of softening the water hardness and improving the pH of the washing liquid, and its dosage is generally large; the dosage of additives is small, which is customarily called "small material". Builders are mostly used in washing powder, and the amount added in liquid washing is very limited, unless it is a structured liquid washing. STPP (sodium tripolyphosphate) has comprehensive performance as a water softener and is an unparalleled builder. However, since STPP is a phosphorus-containing additive, it will aggravate the eutrophication of closed water bodies to a certain extent, so it cannot be used as a green detergent surfactant.
-
2023-04-08 10:15:30
The effect of using a surfactant is to reduce the surface tension of the ink. High-quality printing can only be obtained when the contact angle between the ink drop and the paper is greater than 140, and the lower the surface tension of the ink, the larger the contact angle.
-
2023-04-04 10:14:49
Containers for amino-terminated polyethers can be made of steel, aluminum, polyethylene or polypropylene. The storage temperature should not exceed 70°C. To prevent moisture absorption and oxidation, it is recommended that the container be filled with nitrogen. We generally pack them in clean, dry, sealed, leak-free galvanized iron drums. Avoid sunlight, rain and fire sources during storage. Not subject to storage regulations for flammable liquids, but should avoid entry into ground or surface water as it is not readily biodegradable.
-
2023-03-31 17:03:51
Commonly used alkyl glycoside surfactants are mainly coupling agents, higher fatty acids and their salts, unsaturated organic acids and silicones. The coupling agent is a commonly used mineral surfactant.
-
2023-03-27 09:42:28
The full name of silicone rubber compound is methyl vinyl silicone rubber compound, which is a new type of environmentally friendly silicon material produced from methyl vinyl silicone rubber, white carbon black, silicone oil and other auxiliary materials.
-
2023-03-23 15:58:46
Flame retardant, as the name suggests, is an additive used to prevent materials from being ignited and prevent the spread of fire. It is mainly designed for flame retardancy of polymer materials. Generally speaking, flame retardants mainly achieve flame retardant effects by absorbing heat, covering, and preventing suffocation of non-combustible gases. Materials treated with flame retardants can effectively prevent and delay the spread of flames when attacked by external fire sources.
-
2023-03-19 09:47:32
Biosurfactants are a class of biological compounds with surface activity produced by microorganisms. In addition to the physical and chemical properties of chemically synthesized surfactants, they also have the advantages of non-toxicity and high efficiency. Alternatives or upgrades to synthetic surfactants. This paper summarizes the research progress of biosurfactants in bioremediation of organic pollution in recent years, and looks forward to the development direction of this technology. This will lay the foundation for the research and application of this method in our country.
-
2023-03-15 16:50:06
After surfactants form micelles in aqueous solution, they have the ability to significantly increase the solubility of insoluble or slightly water-soluble organic compounds, and the solution is transparent.
-
2023-03-11 16:01:02
Surfactant molecules are adsorbed at the gas-liquid interface. Figure 7 is a schematic diagram of surfactant molecules in the adsorption process. When the concentration is very dilute, the adsorption amount is small, the surface adsorbed molecules are less, and can lie flat on the gas-liquid interface; as the concentration increases, at medium concentrations, the orientation of surface adsorbed molecules on the solution surface has greater randomness
-
2023-03-07 11:28:14
While surfactants bring great convenience to people's life and industrial and agricultural production, they also pollute our environment. This is a worldwide problem, especially in our country, which should be paid more attention to.
-
2023-03-03 16:36:50
Alkyl glycoside APG soil-free drilling fluid has less solid content and less submicron solid particles, which greatly relieves the solid phase from invading the formation and blocking the reservoir pore throat during drilling, and reduces the damage of solid to the reservoir.
-
2023-02-27 16:34:31
The steady growth of surfactants in the world provides a good external environment for the development and growth of the cosmetics industry, and the requirements for product structure, variety, performance and technology are also getting higher and higher.
-
2023-02-23 16:57:06
Adsorption of surfactants (from solution) on soiled and washed surfaces has a major impact on cleaning action. This effect is mainly due to the changes in various properties (such as mechanical properties, electrical properties and chemical properties) of the interface and surface due to adsorption.
-
2023-02-19 16:47:48
The use of biosurfactants to remediate soils contaminated by hydrocarbons and crude oil is a new technology. For example, cascara produced by Pseudomonas aeruginosa removed a large amount of oil from the Alaskan gravel. VanDyke et al. found that from contaminated sand and mud, the rhamnolipids produced by Pseudomonas aeruginosa can increase the recovery of hydrocarbons by 25% to 70% and 40% to 80%, respectively. Similarly, treatment of sandy soils with biosurfactants produced by Pseudomonas aeruginosa resulted in 56% and 73% recoveries of aliphatic and aromatic hydrocarbons, respectively.
-
2023-02-16 17:15:59
Flame retardant science and technology is a science developed to meet the needs of social safety in production and life, prevent fires, and protect people's lives and property.
-
2023-02-12 11:04:20
The use of surfactants in the flotation of ore is to use the floating effect. Stir and blow air from the bottom of the pool, the bubbles with effective mineral powder gather on the surface, collect and defoam and concentrate, thus achieving the purpose of enrichment. The mud, sand and rocks without ore are left at the bottom of the pool and should be removed regularly.
Altogether 728 article, Every page shows:20 article