Surfactants have broad application prospects in the field of nano materials

2022-01-17 16:07:57

The application of surfactants in the field of nano material preparation has been familiar to everyone, and from another point of view, the development of nanotechnology has entered the stage of "the difficulty is not how to prepare nanoparticles, but how to establish the relationship between macro and micro, and how to apply nano materials", The role of surfactants in the application of nano materials is very important. This paper introduces the role of surfactants in the application field of nano materials, and looks forward to the broad application prospect of surfactants in the field of nano materials.

Surfactants have played an indispensable role in the research and application of nano materials. In the field of nano material preparation, various nano materials were successfully prepared by using the ordered aggregates formed by surfactant molecules in the dispersion system, such as micelles, reverse micelles and microemulsions; Cationic surfactant, as an intercalation modifier of inorganic silicate, can play an important role in the preparation of polymer based inorganic nanocomposites; Modification with surfactant is an important means to prevent nanoparticle coalescence; Surfactants are also used in the detection of nano materials. From the preparation and characterization of nano materials to the application of nano materials, surfactants play an extremely important role because of their unique properties.

Surfactants have a series of excellent properties, such as wetting, emulsification, dispersion, solubilization, foaming, defoaming, penetration, washing, antistatic, lubrication and sterilization. They have penetrated almost all technical and economic departments in social life. In recent years, with the progress of society, the development of science and technology and the emergence of a large number of high-tech industries, the application field of surfactants is also expanding.

In the process of using nanoparticles, solving the dispersion problem of nanoparticles has attracted much attention. Ultrafine particles have surface effect and volume effect, and show specific properties different from large particle materials. Their specificity can be greatly affected by particle size. Nanoparticles are easy to form aggregates due to their special surface structure. The interaction energy between nanoparticles is different from that between conventional particles (or particles), which is temporarily called nano interaction energy. Qualitatively speaking, this nano action energy is that the surface of nanoparticles has high activity due to the lack of adjacent coordination atoms, which is the internal property of nanoparticles' agglomeration. Its physical significance should be the adsorption capacity of nanoparticles per unit specific surface area. This adsorption force is the sum of several aspects of nanoparticle adsorption: adsorption caused by hydrogen bond and electrostatic interaction between nanoparticles; Quantum tunneling between nanoparticles, charge transfer and adsorption caused by local coupling of interfacial atoms; The huge specific surface of nanoparticles produces adsorption. Nano interaction energy is the internal factor for the easy agglomeration of nanoparticles.