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消泡剂机理和消泡剂的用途详细描述

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消泡剂机理和消泡剂的用途详细描述

发布日期:2019-11-29 作者: 点击:

  消泡剂是指具有化学和界面化学消泡作用的药剂。作为消泡剂,有低碳醇、矿物油、有机极性化合物及硅树脂等。其形态有油型、溶液型、乳液型、泡沫型。作为消泡剂均具消泡力强、化性不乱、生理惰性、耐热、耐氧、抗蚀、溶气、透气、易扩散、易渗透渗出、难溶于消泡体系且无理化影响、消泡剂用量少、高效等特点。 消泡剂品种繁多,用途广泛。消泡剂“抑泡”、“破泡”过程是:当体系加入消泡剂后,其分子杂乱无章地广布于液体表面,按捺形成弹性膜,即终止泡沫的产生。当体系大量产生泡沫后,加入消泡剂,其分子立刻散布于泡沫表面,快速铺展,形成很薄的双膜层,进一步扩散、渗透渗出,层状入侵,从而取代原泡膜薄壁。因为其表面张力低,便流向产生泡沫的高表面张力的液体,这样低表面张力的消泡剂分子在气液界面间不断扩散、渗透渗出,使其膜壁迅速变薄,泡沫同时又受到附近表面张力大的膜层强力牵引,这样,致使泡沫附近应力失衡,从而导致其“破泡”。不溶于体系的消泡剂分子,再重新进入另一个泡沫膜的表面,如斯重复,所有泡沫,全部覆灭。


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北京11选5  4.TIANJIASHUSHUIGUTIKELIKEDAOZHIQIPAOPOMIE


北京11选5  ZAIQIPAOBIAOMIANSHUSHUIGUTIKELIHUIXIYINBIAOMIANHUOXINGJIDE SHUSHUIDUAN,SHISHUSHUIKELICHANSHENGQINSHUIXINGBINGJINRUSHUIXIANG,CONGERQIDAOXIAOPAODEZUOYONG。


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消泡剂

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关键词:消泡剂,工业消泡剂,有机硅消泡剂

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