13． Among nonionic surfactants, most can be used as leveling agents and cleaning agents. How are they different?
Answer There are many types of non-ionic surfactants. Now we will introduce the commonly used varieties and their properties. ① Fatty alcohol polyoxyethylene ether, its chemical structural formula is R-O(CH2CH2O)nH. This type of surfactant has properties such as cleaning, wetting, dispersing, and emulsifying. Its hydrophobic group, that is, the number of carbon atoms in the alkyl group (c) and the number of molecules condensed with ethylene oxide (n), have a great impact on product performance. Generally, When n=c/3, it is mainly used as a detergent. When n=c/2, it is suitable for low-temperature (30~50℃) cleaning, such as detergent
H, can be used as leveling agent for acid dyes.
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