"In industrial cleaning, foam not only affects decontamination, but is also difficult to rinse, easily residual, and even overflows the cleaning device, causing waste. Moreover, foam will carry away surfactants from the cleaning liquid phase, so low-foam cleaning products need to be used to achieve good cleaning effect. "
The generation and stability of foam in industrial cleaning are affected by many factors, such as surfactant structure, other components in the cleaning solution, acidity and alkali properties and electrolytes, temperature, water hardness, oil stain, cleaning method, etc. Therefore, low-foam surfactants refer to surfactants that do not produce foam or are unstable and can disappear quickly under the conditions of use.
Acid/alkaline: They can be considered to be acid/alkali resistant under normal conditions. In particular, alkyl-terminated alcohol ethers can be stable for a long time under high temperature and high acid/alkali conditions (their own structure will not change)
surface active: Due to the limitation of the molecular structure, the polarity difference between the hydrophilic and oleophilic groups in the amphiphilic structure of the surfactant is significantly reduced.
Cloud point reduction: Due to the relatively increased number of lipophilic groups in the structure, the cloud point of low-foaming non-ionic surfactants is relatively low.
freezing point depression: Because the hydrophilic end is closed by a lipophilic or relatively lipophilic group, the intermolecular force is weakened, resulting in a decrease in the freezing point of the product. This property provides convenience for the use of this type of product.
Reduced tendency to gel: The tendency of this type of product to form gel in water is greatly reduced, which is very beneficial to product formulation.
Application of low-foaming surfactants in industrial cleaning
Machine cleaning of tableware: Usually pre-wash dishes before entering the dishwasher
in-situ cleaning: mainly refers to cleaning during food production and processing. During the cleaning process, the main role of surfactants is wetting. At the same time, the surfactants in the cleaning products are low-foaming surfactants, which have defoaming and anti-foaming effects, which can ensure that the cleaning is carried out smoothly.
Cleaning of recycled beverage bottles: Mainly for the cleaning of recycled beer bottles
metal cleaning: In metal cleaning, in addition to wetting, defoaming and anti-foaming, surfactants must also have a strong decontamination effect. In addition, as the cleaning progresses, oil pollution may cause an increase in foam in the system, so the active agent is required to have good decontamination characteristics at the same time, and not only has low foam, but also has the ability to inhibit foam caused by oil pollution. (The above content is taken from: China Surfactant Network)
Hangzhou Danwei Technology Co., Ltd. specializes in customizing various EO/PO structural polyethers. Welcome to call for consultation: 0571-82890506, 13567543015.
