English: Fluorine surfactant/fluorocarbon surfactant
As we all know, surfactants are generally composed of polar groups (hydrophilic groups) and nonpolar groups (hydrophobic groups). The nonpolar groups of common surfactants are hydrocarbon chains, while the nonpolar groups of fluorocarbon surfactants are fluorocarbon chains, that is, fluorine atoms partially or completely replace hydrogen atoms in hydrocarbon chains. However, there is no obvious difference in polar group structure between them. Therefore, fluorocarbon surfactants are surfactants that use fluorocarbon chains instead of hydrocarbon chains as nonpolar groups in molecules.
Fluorocarbon surfactants can be divided into anionic, cationic, nonionic and amphoteric fluorocarbon surfactants, as well as other types of fluorocarbon surfactants such as silicon-containing fluorocarbon surfactants, hybrid surfactants, long-chain surfactants and non-hydrophilic fluorocarbon surfactants.
Fluorocarbon surfactants are widely used in synthetic detergents, cosmetics, food, rubber, plastics, ink and many other industries. In photosensitive materials, it is mainly used as wetting agent, emulsifier and antistatic agent. At the same time, it can also be used as an additive of fire extinguishing agent and ink additive, and can be used in petroleum exploitation, textile printing and dyeing, paper leather treatment, environmental protection pesticides, synthetic resins, high-grade coatings and so on.
Since the organic synthesis, fluorocarbon surfactants have attracted people's extensive attention and interest, and their research and application have developed rapidly, and their importance in science and technology, industry and daily life has been increasingly recognized. In foreign countries, DuPont began to industrially produce fluorocarbon surfactants as early as 1950s and 1960s, and other companies also developed their own industrial synthetic routes. In China, the Institute of Organic Science of Chinese Academy of Sciences began to study the surface activity of fluorocarbon in 1960s, and achieved positive results, and developed some industrialized products. In recent years, with the continuous development of domestic economy and the improvement of people's consumption level, DuPont, 3M and other companies in the United States have noticed the great potential and attractive prospects of the China market, and successively launched a series of products in China. To be sure, due to the unique properties of fluorocarbon surfactants, their application scope will continue to expand, their application level will continue to improve, and their position in the field of surface treatment will become more and more important. Pigments and fillers, additives, resins, emulsions and dispersions, so people can't help asking: What is fluorocarbon surfactant? What are its unique properties? What fields or industries can it be applied to?
What kind of radical quencher is FFA? Fluorine surfactant, FSA for short, is a surfactant with fluorocarbon chain as nonpolar group, that is, fluorine atom partially or completely replaces hydrogen atom in hydrocarbon chain. Fluorocarbon surfactants have high surface activity, high thermodynamic and chemical stability.
As we all know, surfactants are generally composed of polar groups (hydrophilic groups) and nonpolar groups (hydrophobic groups). The nonpolar groups of common surfactants are hydrocarbon chains, while the nonpolar groups of fluorocarbon surfactants are fluorocarbon chains, that is, fluorine atoms partially or completely replace hydrogen atoms in hydrocarbon chains. However, there is no obvious difference in polar group structure between them. Therefore, fluorocarbon surfactants are surfactants that use fluorocarbon chains instead of hydrocarbon chains as nonpolar groups in molecules. However, it has many properties that ordinary surfactants do not have or are superior to other surfactants, which has aroused widespread concern and shown more and more vitality. Widely used in fire protection, chemical industry, pesticide, mineral processing, papermaking, leather, textile and other fields. [2]
Detailed analysis of water-based fire extinguishers, professional advanced must see! Maybe everyone has a certain understanding of the basic fire extinguishing principle of water-based fire extinguishers, but if you want to talk about a specific reason or the specific composition of the substance contained in the fire extinguisher, you can't answer it. So now we will use a simple but professional explanation method to analyze the composition of water-based fire extinguishers.
Fire extinguishing principle of water-based fire extinguisher;
In order to understand the composition of water-based fire extinguisher, we must first understand its fire extinguishing principle. Water-based fire extinguishers are based on the principle of physical fire extinguishing. When a fire breaks out, water mist is formed after being sprayed on the burning substance, which can quickly spread over the fire and evaporate a lot of heat, thus achieving the purpose of cooling down. In addition, the surfactant installed in the fire extinguisher will instantly form a water film when sprayed on the surface of combustible materials, which will isolate combustible materials from oxygen in the air and prevent re-ignition. Simply put, it is the dual function of "cooling" and "oxygen isolation".
Composition of water-based fire extinguisher:
Water-based fire extinguisher is composed of hydrocarbon surfactant, fluorocarbon surfactant, flame retardant and auxiliary agent. Now, these components will be described in detail.
Hydrocarbon surfactant: surfactant (also known as amphiphilic molecule), which consists of hydrophilic and lipophilic parts. The surfactant whose lipophilic part is hydrocarbon is hydrocarbon surfactant, and many common surfactants are hydrocarbon surfactants.
Fluorocarbon surfactant: Compared with hydrocarbon surfactant, fluorocarbon surfactant is a surfactant whose lipophilic part is hydrocarbon, or in other words, the nonpolar group of hydrocarbon surfactant (i.e. lipophilic part) is hydrocarbon chain, while the nonpolar group of fluorocarbon surfactant is fluorocarbon chain.
Flame retardant: As the name implies, it is mainly to hinder the flammability of polymer materials. The better flame retardant is red phosphorus in halogen-free flame retardant. It has the advantages of low dosage, high flame retardant rate, low smoke, low toxicity and wide application.
What about "AFFF water film-forming foam extinguishing agent and nitrogen"? Don't worry! Look:
The so-called water film foam fire extinguishing agent (AFFF) can not be separated from hydrocarbon surfactants and fluorocarbon surfactants. Only by using these two surfactants as the base materials can a water film be formed on the surface of some hydrocarbon liquids, thus achieving the purpose of fire extinguishing.
Nitrogen helps to put out the fire, mainly because its heat capacity can reduce the combustion temperature.
How to use clear water fire extinguisher;
Hang the clean water fire extinguisher to the fire site, and stand upright and steady at a distance of 10 meter. Take off the helmet and pat the protruding head at the top of the pole with your palm. At this point, the sealing diaphragm of the gas cylinder is punctured, and carbon dioxide gas enters the gas cylinder, forcing clean water to be sprayed from the nozzle. At this time, you should immediately lift the fire extinguisher with one hand and hold the bottom ring of the fire extinguisher with the other hand, and aim the sprayed water at the place where the fire burns most violently. With the shortening of the spraying distance of the fire extinguisher, the operation should be gradually close to the burning material, so that the water flow is always sprayed at the burning place until the fire is extinguished.
In the process of spraying, the fire extinguisher should always be in a state roughly perpendicular to the ground. Don't put it upside down or horizontally, otherwise the pressurized gas will leak out and the fire extinguishing agent can't be ejected. Enhanced liquid fire extinguisher
The reinforced liquid fire extinguisher is filled with reinforced liquid fire extinguishing agent, which is made of potassium carbonate, water and a small amount of organic additives. The intensified liquid fire extinguisher is a pressure storage fire extinguisher, and its structure is basically the same as that of the portable "12 1 1" fire extinguisher.
Enhanced liquid fire extinguishers are available in 4L and 8L specifications, and they are used in the same way as clear water fire extinguishers.
foam extinguisher
Foam extinguisher, also known as mechanical foam extinguisher, refers to a fire extinguisher equipped with air foam extinguishing agent. It is mainly used to put out the initial fires of class B substances such as gasoline, kerosene, diesel oil, vegetable oil and grease, and can also be used to put out the initial fires of class A substances such as wood, bamboo, cotton, fabric and paper. Among them, solvent-resistant foam extinguisher can put out fires in polar solvents such as methanol, ether and acetone. Foam extinguisher cannot put out live equipment fires and light metal fires.
According to the energy combination order of air foam stock solution and clean water, foam extinguisher can be divided into two types: premixed type and split-package type. Pre-mixing means that air foam stock solution and clean water are mixed in proportion in advance and put into fire extinguishers together; Sub-packaging means that air foam stock solution and clear water are packaged in fire extinguishers respectively, and the two liquids are mixed in proportion when used. According to different pressurization methods, foam extinguisher can be divided into accumulator type and gas cylinder type.
After reading the article, do you have a more professional understanding of the composition of water fire extinguishers? In a word, Bian Xiao was moved by his careful analysis! Finally, warm reminder: fire extinguishers are necessary fire extinguishing tools to prevent fires and ensure the safety of life and property. Therefore, no matter what kind of fire extinguisher, I hope everyone must have one at home, for themselves, for their families and for the people around them.
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The price and manufacturer introduction of fluorocarbon surfactant fluorocarbon surfactant is a special kind of fluorocarbon surfactant. Its greatest advantage is that it is both oleophobic and hydrophobic. It can be used in the environment where other fluorocarbon surfactants are insufficient. For example, under the conditions of strong acid and high temperature, fluorocarbon surfactants are mostly used in paints, coatings, antifouling agents, flux, rinsing AIDS and so on. Next, Bian Xiao recommended several high-quality enterprises that produce fluorocarbon surfactants.
Manufacturer 1: Shanghai Lunxiang Chemical Technology Co., Ltd.
Main products: environment-friendly nonionic fluorocarbon surfactant.
Business introduction: Shanghai Lunxiang Chemical Technology Co., Ltd. adopts advanced production technology, efficient production technology and high-quality raw materials to produce products with higher surface activity and good stability.
Products: fluorocarbon surfactant
Model: BY- 1802
Price: ￥ 160.00
Batch number: ≥ 1 kg
Address: Shanghai
Manufacturer 2: Jinan Zian Chemical Co., Ltd.
Main products: pharmaceutical intermediates; Textile printing and dyeing; Chemical raw materials; Paint ink additive; Electroplating materials; Adhesive raw materials; Food additives; Chemical raw material
Business introduction: Jinan Zian Chemical Co., Ltd. was established on 20 13. The company has cooperated with many retailers and has rich production experience. The products produced over the years have been widely recognized by the same industry.
Products: Shandong fluorocarbon surfactant
Model: 25KG/ barrel
Price: ￥ 180.00
Batch number: ≥ 1 kg
Address: Jinan, Shandong
Manufacturer 3: Shanghai Jianbang Industrial Co., Ltd.
Main products: nylon stabilizer; Antistatic agent; Ultraviolet absorber; Foaming agent; Waterproof and oil-proof agent; Coating a surface protective agent; Stone protective agent; Anti-sticking agent for latex paint
Businessman introduction: Shanghai Jianbang Industrial Co., Ltd. mainly deals in various chemical additives. This company represents all kinds of chemical products. The market faces all parts of the country, and there are many brands, which are deeply loved by consumers.
Products: fluorocarbon surfactant
Model: Zonell FSN-100
Price: ￥220.00
Batch number: ≥ 1 bottle
Address: Shanghai
Manufacturer 4: Guangzhou Xieguang Trading Co., Ltd.
Main products: glycerol; Stearic acid; Ethylene glycol; Triethanolamine; Dimethyl silicone oil; Polyethylene glycol PEG series; AOS； Soft oil; Soda soda; sodium hyposulfite
Business introduction: Guangzhou Xieguang Trading Co., Ltd. has been adhering to the service concept of honest trading, product quality first, fair price and customer first for many years, producing and managing various chemical reagents, and has a perfect production and management team.
Products: nonionic fluorocarbon surfactant
Model: FC-320
Price: ￥650.00
Batch number: 1-9kg
Address: Guangzhou, Guangdong
The above are several fluorocarbon surfactant manufacturers recommended by Bian Xiao. The price of fluorocarbon surfactants is generally expensive, so you must do a good job of research before buying. Bian Xiao recommends Alibaba's top sellers for you, with reliable after-sales and product quality.
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