Functions of Cationic Surfactant - Wetting Effect
When the solid is in contact with the liquid, the original solid/gas, liquid/gas interface disappears and a new solid/liquid interface is formed. This process is called wetting. For example, textile fiber is a porous material with a huge surface. When the solution spreads along the fiber, it enters the gap between the fibers and drives the air out, turning the original air/fiber interface into a liquid/fiber interface. It is a typical wetting process. At the same time, the solution will enter the inside of the fiber, and this process is called infiltration. Surfactants that aid in the wetting and osmotic action are known as wetting agents and penetrants.
Washing and decontamination
Due to the emulsification of the surfactant, the grease stain particles detached from the solid surface can be stably emulsified and dispersed in the aqueous solution, and are no longer deposited on the surface to be re-contaminated.
The effect of the surfactant is explained below by the process of removing the liquid oil from the surface.
The liquid oil was originally spread on the solid surface. When the surfactant was added, because of its low surface tension, the aqueous solution of the surfactant quickly spread on the solid surface to wet the solid, and gradually replaced the oil. The oil stained on the solid surface gradually curls into oil droplets (the contact angle gradually increases from wet to non-wetting).
- January 25, 2019An amphoteric surfactant refers to a surfactant having both an anionic and a cationic hydrophilic group, and thus the surfactant is cationic in an acidic solution, anionic in an alkaline solution, and...view
- January 25, 2019Foaming effectThe state in which the gas is dispersed in the liquid is called a bubble. If a liquid is easily formed into a film and is not easily broken, the liquid will produce a lot of foam when it...view
- January 25, 2019The main varieties of nonionic surfactants are alkyl alcohol amide (FFA), fatty alcohol polyoxyethylene ether (AE), alkyl phenol ethoxylate (APE or OP). Nonionic surfactants have good solubilization, ...view
- January 25, 2019Suspension dispersionThe process by which insoluble solids are dispersed into a solution to form a suspension with very small particles is called dispersion. The surfactant which acts to promote solid...view
- January 25, 2019Commonly used such active agents are fatty alcohol polyoxyethylene ether sulfate and sodium lauryl sulfate. The fatty alcohol polyoxyethylene ether sulfate is aliased to AES, sodium alcohol ether sulf...view
- December 17, 2018The development direction of surfactant will be demonstrated in the following: 1. it turns to be natural; 2. it will replace harmful chemicals, 3. it will be washed to put into use at room temperature...view