Building water supply and drainage knowledge: consumer action principle agent-Iota

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News > Dynamic industry > Building water supply and drainage knowledge: consumer action principle agent

Building water supply and drainage knowledge: consumer action principle agent

Foam and foam is often associated with people's life and production, sometimes need touse it, like fire, flotation, dust removal, washing, manufacturing of ceramic foam and plastic; sometimes need to eliminate it, such as fermentation, paint, papermaking,printing and dyeing, eliminate body organ flatulence, boiler water, waste water treatment and prism (or glass) manufacturing etc.. The so-called "bubble" or "bubble" refers to the non soluble gases present in a liquid or solid, or exists in their film surrounded byindependent bubble (bubble). Many bubbles collect bubble together each other with thin films separated the accumulation that (foam). The bubble is a kind of gas / liquid, gas /solid dispersion system, gas / liquid / solid interface, which is common in mineral and oilsystem of bubbles.

Generally speaking, pure water and pure surfactant does not bubble, it is because theirsurface and interior is uniform, it is hard to form the elastic film, even if the formation is not stable, will disappear. But the existence of surfactant in the solution, the formation of air bubbles, due to intermolecular force, the molecules in the hydrophilic group and hydrophobic group is the bubble wall adsorption, forming a regular arrangement, thedear water-based toward the water phase, hydrophobic groups toward the bubble, so as to form the elastic membrane at the bubble interface, its stability strong, normal is not easy to break. Foam stability and surface viscous and elastic, electric repulsive, surface film of mobile, temperature, evaporation and other factors. Furthermore, the surface tension of a liquid with bubbles of the reverse correlation, the tension of the smaller,more easily foaming. In life and production, sometimes the emergence of the bubble,brought many inconvenience, so must the defoaming.

Who can destroy the foam stability factors, can be used for defoaming. Defoamingcovers "bubble suppression" and "bubble breaking" double factors. Defoaming agent isFu this function, it can reduce the surface tension of water, solution, suspension, prevent the formation of bubbles, or make the original foam to reduce, usually has a selective effect. The general physical bubble elimination method is difficult to instantly defoaming,chemical and interface defoaming, very fast, convenient, efficient.

In a word, defoaming agent is the interface chemistry and chemical elimination agentfoam effect. As antifoam agent, have a low carbon alcohol, mineral oil, organic polarcompounds and silicone resin. Its shape oil type, solution type, emulsion type, foam type.As antifoam agent are antifoaming strong, stable chemical property, physiological inert,heat-resistant, resistant to oxygen, anti erosion, dissolved gas, breathable, easy tospread, easy penetration, insoluble in defoaming system and irrational effect, lessamount of defoaming agent, efficient.

Defoaming agent variety, a wide range of uses. Defoaming agent "anti bubble", "bubble breaking" process is: when the system adding defoaming agent, the molecules to bewidely distributed in the liquid surface, inhibiting the formation of elastic membrane, i.e.termination bubble. When the system produce a large number of foam, add defoamer, its molecular immediately spread on the bubble surface, rapid spreading, forming a doublelayer is very thin, further diffusion, osmosis, layered intrusion, to replace the originalbubble film thin. Due to its low surface tension, will flow to produce high surface tension of foam liquid, so that the lower the surface tension of defoamer molecules in the gas-liquid interface between diffusion, osmosis, the membrane wall thinned rapidly, and by the film bubble surface around the Zhang Lida strong traction, this kind of bubble,causing the surrounding stress imbalance, leading to its "bubble breaking". Insoluble insystem defoaming agent molecules, surface, and then re entering another bubble filmrepeat, all bubbles, all the destruction.