In order to solve the problems of numerous cleaning processes and high water and energy consumption,the supercritical CO2 cleaning method was compared with the traditional cleaning method,ultrasonic and acid protease combined method,and the influence of different cleaning temperatures on the whiteness,fluffiness,residual fat rate and microbial content of down was discussed,as well as the influence of different cleaning methods on the microscopic changes of the surface of down.The optimal cleaning temperature of supercritical CO2 method is 80℃.Under this condition,after cleaning,the whiteness value of down is 62.8%,the fluffiness is 17.9 cm,the residual fat rate is reduced to 0.97%,the microbial content meets the standard limit requirements,and the surface of down is relatively smooth without obvious damage,so as to achieve the traditional cleaning effect.The supercritical CO2 cleaning method has no pollution and zero emission in the whole process,which meets the development requirements of low-carbon economy and realizes the new clean processing and production of down.
downsupercritical CO2 washingwhitenessfluffinessmicrobial content
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维普
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