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Cutting fluid defoamers
Release Date：2016-3-2 Source：xiashundong Views：1008
Widely used in metal cutting fluid processing areas, it is mainly a lubricant, rust-proof, cleaning, cooling effect. Chemical synthetic cutting fluid is a new water-based cutting fluid, which is composed of various additives mixed together, with stable performance, long life cycle, low pollution and other advantages.
Blistering Causes
"Bubble" is insoluble gas into the liquid under loads among heterogeneous systems and fluid isolated, i.e. a gas dispersed in a liquid body systems. The surface tension of the liquid foam generation and are directly related. The developed chemical synthetic cutting fluid formulated into a series of different concentrations of aqueous solution, measuring the surface tension of aqueous solutions of different concentrations. After a series of experiments can be seen, adding the cutting fluid can significantly reduce the tension and the water table. When the concentration I. 50h, the surface tension to a minimum. That CM (I.5% from the second value characteristic curve seen cutting fluids similar to a table while the active agent, when the cutting fluid concentration (: 61 (B, the surface of the aqueous solution to gather a large amount of surfactant substance formed monolayers, and the tension of the system table minimum. the active substance having a parent table structure, one end of the hydrophilic, lipophilic end, easy to form a foam. the actual use of cutting fluid, formulated at concentrations greater than CM (binary, solution and a sufficient amount of an active material sheet, when the cutting metalworking fluid recycled, in contact with a large number of air bubbles form, the cutting fluid surfactant in the gas-liquid interface adsorption alignment film is formed, so that the foam is stable with the cutting process, some of the solid particles are easily adsorbed on the surface of the foam, forming a three-phase foam, the foam is more stable. Thus, while the active substance in the gas-liquid boundary occurs mainly due to the formation of positive absorption foam cutting fluid table to form a stable absorption film.
Defoamers principle
The cutting fluid to bubble through the redistribution of the gas bubbles, the film thickness can be thinned adsorbed natural defoamed. Redistribution bubble was mainly due to the additional stress caused by different, when the bubble sizes of cutting fluids, set small bubbles "is a large bubble radius is It, additional pressure 2, r> 2 (r, when the two when the bubbles contact the gas sector and by the proliferation of small bubbles into large bubbles, small bubbles so that smaller, larger and large bubbles burst. thinning liquid discharge by evaporation adsorption film thickness, when cutting fluid form a bubble, for in terms liquid and the liquid is concave, additional pressure point to the center of curvature, the force causing the liquid to move the membrane wall thinning, so that the bubble burst. natural defoaming long time, meet the requirements, but based on the principle that we can have a destination adding the appropriate material, it quickly defoamed. when the bubble, can be added to the table and a substance having a lower tension, it quickly penetrate the liquid film between the bubble and the tension is low because the table is automatically flow of liquid surface tension high liquid, causing bubbles stress imbalance, achieve the purpose of defoaming. 13 to join the substance is ._4 between a river, can capture surfactant hydrophobic chain ends, it quickly spread, inhibiting the formation of an elastic film, prevent the formation of bubbles in order to achieve defoaming purposes.
The amount of defoamers
Defoamers chemical manufacturers have developed efficient synthetic cutting fluid concentrate, plus 20 times the water will dilute the use of special composite cutting fluid defoamer directly into the dilute solution to achieve good defoaming, but inconvenient to use, it should be add it to concentrate. The best ratio obtained by the orthogonal experiment preparation of a compound defoamers amount added to the process and experiment. Experimental results show that the composite defoamer is preferably added in the process of cutting fluid formulation in an amount <I%. Was added in two steps, the first step in the synthesis of the mid cutting fluid was added, the reaction liquid with the defoamer can suppress foam during the reaction, the reaction in the second step added later. Defoamer was added in stages to better play its performance, but also can reduce the amount.
Blistering Causes
"Bubble" is insoluble gas into the liquid under loads among heterogeneous systems and fluid isolated, i.e. a gas dispersed in a liquid body systems. The surface tension of the liquid foam generation and are directly related. The developed chemical synthetic cutting fluid formulated into a series of different concentrations of aqueous solution, measuring the surface tension of aqueous solutions of different concentrations. After a series of experiments can be seen, adding the cutting fluid can significantly reduce the tension and the water table. When the concentration I. 50h, the surface tension to a minimum. That CM (I.5% from the second value characteristic curve seen cutting fluids similar to a table while the active agent, when the cutting fluid concentration (: 61 (B, the surface of the aqueous solution to gather a large amount of surfactant substance formed monolayers, and the tension of the system table minimum. the active substance having a parent table structure, one end of the hydrophilic, lipophilic end, easy to form a foam. the actual use of cutting fluid, formulated at concentrations greater than CM (binary, solution and a sufficient amount of an active material sheet, when the cutting metalworking fluid recycled, in contact with a large number of air bubbles form, the cutting fluid surfactant in the gas-liquid interface adsorption alignment film is formed, so that the foam is stable with the cutting process, some of the solid particles are easily adsorbed on the surface of the foam, forming a three-phase foam, the foam is more stable. Thus, while the active substance in the gas-liquid boundary occurs mainly due to the formation of positive absorption foam cutting fluid table to form a stable absorption film.
Defoamers principle
The cutting fluid to bubble through the redistribution of the gas bubbles, the film thickness can be thinned adsorbed natural defoamed. Redistribution bubble was mainly due to the additional stress caused by different, when the bubble sizes of cutting fluids, set small bubbles "is a large bubble radius is It, additional pressure 2, r> 2 (r, when the two when the bubbles contact the gas sector and by the proliferation of small bubbles into large bubbles, small bubbles so that smaller, larger and large bubbles burst. thinning liquid discharge by evaporation adsorption film thickness, when cutting fluid form a bubble, for in terms liquid and the liquid is concave, additional pressure point to the center of curvature, the force causing the liquid to move the membrane wall thinning, so that the bubble burst. natural defoaming long time, meet the requirements, but based on the principle that we can have a destination adding the appropriate material, it quickly defoamed. when the bubble, can be added to the table and a substance having a lower tension, it quickly penetrate the liquid film between the bubble and the tension is low because the table is automatically flow of liquid surface tension high liquid, causing bubbles stress imbalance, achieve the purpose of defoaming. 13 to join the substance is ._4 between a river, can capture surfactant hydrophobic chain ends, it quickly spread, inhibiting the formation of an elastic film, prevent the formation of bubbles in order to achieve defoaming purposes.
The amount of defoamers
Defoamers chemical manufacturers have developed efficient synthetic cutting fluid concentrate, plus 20 times the water will dilute the use of special composite cutting fluid defoamer directly into the dilute solution to achieve good defoaming, but inconvenient to use, it should be add it to concentrate. The best ratio obtained by the orthogonal experiment preparation of a compound defoamers amount added to the process and experiment. Experimental results show that the composite defoamer is preferably added in the process of cutting fluid formulation in an amount <I%. Was added in two steps, the first step in the synthesis of the mid cutting fluid was added, the reaction liquid with the defoamer can suppress foam during the reaction, the reaction in the second step added later. Defoamer was added in stages to better play its performance, but also can reduce the amount.