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The foam is a different from the traditional aerosols Smoke new optical jamming material, it has a durable and efficient wide-band extinction performance , environmental protection, security , etc. . The foam of dangling technology is the key to foam used in optoelectronic countermeasures . The stability of the foam is one of the key factors that affect the unconnected time . In this study, starting from the foam formulations Filter does not affect the foaming properties based on stability, good foaming formula, select the commonly used surfactants , complex experiments . Investigated the effect of gelatin, sodium carboxymethyl cellulose , polyvinyl alcohol and glycerol four foam stabilizing agent . The best formula is obtained by experiment : the basis of 100g of water SDS0.202 % AES0.119 % polyvinyl alcohol 0.3% . Also investigated the external environment influence , preferably derived recipe salt and alkali resistance , the influence of temperature on foam stability , optimum temperature of 20 ° C ~ 40 ° C . Based on the best formula , using Fourier transform infrared spectrometer, laser smokescreen tester and 8mm wave radiation parameters acquisition instrumentation levy bubble diameter distribution , thickness, different proportions of infrared , laser and millimeter wave attenuation performance . The results show that when the Groups of foam diameter of 4 - 7mm , thickness 10cm infrared transmittance of less than 20% of the laser light transmittance of 10% or less ; bubble size distribution 0.8-2cm thickness of 80cm thickness foam corporation mm wave attenuation peak average of 16.7dB . In foam group based on the study , to explore the bubble cloud vacant technology . Foam cloud hanging mechanism , vacant the bubble cloud blistering device , the focus of the bubble cloud vacant influencing factors , concluded that : when the compressed air pressure of 0.4MPa, flow 0.11L/min , helium pressure the 8MPa the flow 7L/min , foam vacant better , long duration . Characterized left floating bubble cloud the extinction capability , wherein the transmittance of infrared and laser are less than 5% , 8 millimeter wave attenuation as 2.2dB . Vacant bubble cloud has good application prospects .
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