ASS:研究发现人类汗液可减少抗菌效果

2014-06-20 佚名 睿医

英国莱斯特大学的科学家们进行的一项研究提示,在与汗湿的手接触仅1小时后,医院及学校内抗菌黄铜制品的有效性可能会降低。门把和水龙头等日常黄铜制品中的铜具有抗菌作用,因而现已广泛应用于疾病传播的预防。但英国莱斯特大学化学部的Dr John Bond OBE发现,人类的汗在与铜制品接触一小时内,可对铜产生充分的腐蚀作用,对其微生物杀灭作用产生负面影响。Dr Bond称:“数百年来,我们一直知道铜具有抑菌

英国莱斯特大学的科学家们进行的一项研究提示,在与汗湿的手接触仅1小时后,医院及学校内抗菌黄铜制品的有效性可能会降低。


门把和水龙头等日常黄铜制品中的铜具有抗菌作用,因而现已广泛应用于疾病传播的预防。但英国莱斯特大学化学部的Dr John Bond OBE发现,人类的汗在与铜制品接触一小时内,可对铜产生充分的腐蚀作用,对其微生物杀灭作用产生负面影响。

Dr Bond称:“数百年来,我们一直知道铜具有抑菌作用。人们认为这是因为铜与细菌之间发生了电荷交换,进而导致细菌DNA讲解。我们发现,汗液中的盐对金属有腐蚀作用,在其表面形成一层氧化层,这即为腐蚀过程。而众所周知,腐蚀层抑制了铜的作用。我们的研究显示,汗液有可能在与金属接触1小时内形成氧化层。”

这是第一项在使用指尖汗液浓度的盐与金属接触1小时后对黄铜等铜合金的暂时性腐蚀进行量化分析的研究。相关研究成果发表于Applied Surface Science杂志。

研究者建议,短期内可通过定期彻底的清洁保证公共环境下的黄铜制品免遭腐蚀。从长期效果来讲,使用含缓蚀剂的铜合金是一个不错的选择。

原始出处:

John W. Bond OBE,Elaine Lieu.Electrochemical behaviour of brass in chloride solution concentrations found in eccrine fingerprint sweat.Applied Surface Science.June 7 2014.DOI: 10.1016/j.apsusc.2014.06.005

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    2014-12-26 ewsr13
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