Defoamers are essential in many CIP items because foaming can render a product ineffective in a CIP application. Non-ionic surfactants having low cloud points, such as ethoxylated or propoxylated fatty alcohols, are commonly employed. As they approach or surpass their threshold of water insolubility, these surfactants can inhibit foam generated by other surfactants as well as foam caused by cleaning residues such as saponified proteins. The major advantage of this sort of defoamer is that as soon as the heat of the solution drops below the cloud point, as it does during an ambient rinse, the surfactant turns water soluble and readily washed off.
What Kind of Chemicals Are Required
The presence of chemical processing helps in assisting through mediums such as defoamers, antifoaming agents, and air release agents that are used to reduce or remove foam in industrial operations. While the words are frequently used interchangeably, they utilise distinct methods, thus it is important to differentiate between them.
- Defoamers are foam management chemicals that are applied to a system after foam has formed to decrease or remove it.
- Antifoaming agents are foam management agents that are applied to a system or formulation to stop foam from forming.
- Air release agents aid in the removal of pressurised gases from a solution and their elevation to the surface.
What Exactly Is Foam?
Whenever gas is injected into and stabilized inside a solution, foam forms. Foam is thermodynamically volatile in pure liquids (such as water), and any bubbles will quickly ascend to the top and explode. Those solutions containing additional surface-active elements that generate a surface tension gradient at the gas-liquid interface (the foam lamella, foam film, or bubble wall) enable for significantly better foam sturdiness as air is added into the solution.
Gravity naturally empties the liquid from foam, resulting in the development of a “dry” polyhedral foam from the top down. Individual bubbles inside the foam vary in size and relative permeability, thus gas spontaneously diffuses from smaller, higher compression bubbles to bigger bubbles. The concentration of surface-active chemicals, however, diminishes as the foam sheet extends. This reduction in intensity results in a local rise in the interfacial tension of the foam layer, limiting bubble coalescence and stabilizing the foam (Gibbs-Marangoni Effect).
Furthermore, defoamers should possess low surface friction and have the capacity to spread responsively along the gas-liquid interface to interact with the foam as much as possible. As a defoamer advances, it must be competent in shifting the foam-stabilizing surface-active components and entering the foam’s lamellae, allowing the confined gas to exit and the foam to explode.
In several material processing and preservation activities, foam is a serious concern. If uncontrolled, it can impair processing efficiency or damage the quality of goods such as inks, coatings, paints, drinks, wastewater, and textiles. 3D resources provide answers for industry experts dealing with these challenges.
So, if you are seeking a defoamer in Malaysia, you should head out and visit 3D Resources, they have all your foaming solutions.…