The main types of nonionic surfactants are alkylamide (FFA), fatty alcohol polyoxyethylene ether (AE), alkylphenol polyoxyethylene ether (APE or OP).
Nonionic surfactants have good solubilization, washing, antistatic, little irritation, calcium soap dispersion and other properties.
The practical pH range is wider than that of general ionic surfactants. In addition to cleaning power and foaming properties,
other properties are often better than the general anionic surfactants. The experiment shows that adding a small amount of non-ionic surfactant
to the ionic surfactant can improve the surface activity of the system -- comparison between the contents of the same active substance.
Alkylolamides are a kind of non-ionic surfactants with excellent performance, wide application and high frequency, which are commonly used in various liquid detergents.
The specifications commonly used in liquid detergents are "2∶1 amide" and "1.5∶1 amide", and "1∶1 amide" can also be used. The three specifications differ in their performance in terms of water solubility and thickening. In general, "1.5∶1 amide" is more moderate and more used in dishwashing liquid. Under normal circumstances, "1∶1 amide" is easily dissolved when combined with other water-soluble surfactants. Alkyl alcohol amides are more suitable for alkaline detergents, and can also be used in general acidic detergents. Alkyl alcohol amide is the cheapest variety of non-ionic surfactants, the price of 7800 yuan /t in 2002. The application frequency of alkyl amide in liquid detergent is more than that of fatty alcohol polyoxyethylene alcohol. The nonionic surfactants used in shampoos are often alkyl alcohol amides. The reasons may be: the comprehensive function of FFA is better than or more than AE; The price of FFA products is lower than AE; The solubility of FFA was better than that of AE. The foamability of FFA was better than AE.