The application of surfactants in aquatic pharmaceutical preparations can improve the appearance properties of the production process and the form of administration, such as stability, clarity, hardness, water solubility, disintegration, solubility, color and taste, etc. In actual application, it can improve the bioavailability of pharmaceutical preparations, but on the other hand, improper use of surfactants will interact with the ingredients in the drug prescription and cause physical and chemical changes (redox, catalytic hydrolysis), which will affect the pharmaceutical preparations The stability of the product, and even affect the curative effect, should be studied before being used in practice when selecting varieties.

Emulsifier is a kind of surfactant. The function of surfactant is to emulsify, and there are others. The main functions of surfactant are: stain removal, emulsification, solubilization, suspension, foaming and defoaming, There are many kinds of surfactants such as sterilization.

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.

Oxygen-increasing principle of surfactants: Adding surfactants to aquaculture water can increase the saturation solubility of oxygen in aquaculture water. According to the hydrate formation theory and the double-membrane theory, since the solubility of oxygen in water is very small, water-oxygenate is generally first formed at the gas-liquid interface in water, and then slowly diffuses from the gas phase to the liquid phase.

Surfactants are often used in industrial industries, and most of them are used in the laundry and textile industries, but they cannot be used in all fine industries. All of our industrial industries, including the pharmaceutical industry, are also inseparable from the use of surfactants, and the paper industry is also a field of the fine industrial industry, and surfactants are also used in the paper industry.

The internal stress of concrete layout is very high, and no strong hard force layout can hinder its opening. The high strength and good adhesion of the grouting adhesive can hinder the continuous expansion of cracks, but new cracks will occur because of the necessary release of the internal stress of the concrete layout. In order to make up for this shortcoming, we need an elastic layout body to participate when we do the planning of cracking adhesive, so that the old gap has a buffer when it shortens and expands, so that it will not occur new cracks.

When in situ remediation is carried out, the use of biosurfactants may have some toxicity and impact on the indigenous microbial populations living in them, and in addition, since they can be degraded by microorganisms, their metabolites may be more toxic.

Surfactant has the ability to strongly adsorb on the surface of particles, adding in the processing of pesticide formulations helps to disperse and suspend the particles, and ensure the re-dispersion when adding water to dilute in the spray barrel to prevent the aggregation of particles.

The research on the application of surfactants in the field of disinfection has developed rapidly in recent years, and the types and quantities of related products approved for marketing are constantly increasing.

Surfactant molecules are first adsorbed on the interface between the oil and the solution. Under the action of the lipophilic and hydrophilic groups of the surfactant, coupled with the convection and stirring of the solution, the oil gradually detaches from the metal surface and enters the solution. , in the form of very small balls to form an emulsion.

Biosurfactants are also used in pulp and paper industry, textile industry, ceramic industry and uranium ore processing. Pellerin and others successfully used the heteropolysaccharide produced by Macrocystis pyrifera and brown nitrogen-fixing bacteria (Azotobacter vinelandii) as a dispersant in the ceramic industry.

At present, there are not many types of high-grade fatliquors. Although there are waterproof, antistatic, antifouling, soft and plump fatliquors, there is a lack of good mercerized fatliquors.

Surfactants are a major component of detergent decontamination formulations. Except for special applications, these products are discharged into the environment after use, either directly or after treatment in sewage treatment plants. However, the anionic surfactants that are relatively difficult to biodegrade are the main ones in detergents.

Mechanism and application of surfactants in tertiary oil recovery.

When the polymer burns, carbon formation in the condensed phase can achieve the purpose of flame retardancy. When the thickness of carbon on the surface of the material reaches 1mm, it can withstand a high temperature of 743°C without catching fire. In coatings, pentaerythritol, polyphosphate and melamine can be used as good carbonizing agent, carbonizing catalyst and blowing agent respectively. If the three are added to the coating in a certain proportion, a flame retardant coating with excellent performance can be made.

Subtilis surfactant (Surfactin), also known as subtilis peptide, is a cyclic ester peptide produced by Bacillus subtilis. It consists of a nonapeptide linked to β-hydroxy-ω-methylmyristic acid by a cyclic depsipeptide bond, and is another well-known class of biosurfactants with antimicrobial properties. According to the amino acid sequence, Surfactin is divided into three types

Glyphosate additives have been widely used in my country. With the increasing environmental protection requirements, low toxicity to aquatic organisms, improvement of product efficacy, different application purposes and specific market requirements, the impact on glyphosate products The research and development of dosage forms also put forward new requirements accordingly.

Biological degradation surfactants is a method that is more studied at present, and has been adopted by some sewage treatment plants. This method can be roughly divided into the active sludge method, anaerobic digestion method, and the method of self -purification of the soil. They all use microorganisms to use the characteristics of the surfactant as the only carbon source to complete the surface active agent to complete the surface active agent. degradation.

In the treatment and recycling of ceramic industry wastewater such as mud and glaze wastewater, precipitants or flocculants are often added. Its role is opposite to the dispersant, which can promote the desertation and gathering of the glue system to improve the dehydration and grouting efficiency of the mud.