伦敦代写作业:化学去污渍

2018-01-17 20:30

今天，几乎每个家庭都有漂白剂。它使织物变白，并通过化学反应除去污渍，将不需要的颜色分解成更小的颗粒，通过清洗可以轻易去除。这两种家用漂白剂是氯漂白剂和过氧化氢漂白剂。过氧化物漂白剂在20世纪50年代引入。虽然有助于去除污渍，尤其是在较高的洗涤温度下，它不会漂白大多数有色物质，也不会象次氯酸钠漂白剂那样使织物变弱。过氧化物漂白剂不消毒并且通常被添加到广告为颜色安全的洗衣洗涤剂中。它也比氯漂白具有更长的保质期。过氧化氢漂白剂在欧洲更为普遍，洗衣机由内置加热盘管制造，可将水温升高至沸点。美国家用漂白剂更常见的形式是氯漂白剂。这是去除污渍和消毒面料最有效的。氯漂白剂制造便宜，在温热洗涤温度和热洗温度下均有效。但是，它具有强烈的化学性能，可以削弱纺织纤维。
伦敦代写作业:化学去污渍
Today, bleach is found in nearly every household. It whitens fabrics and removes stains by a chemical reaction that breaks down the undesired color into smaller particles that can be easily removed by washing. The two types of household bleach are chlorine bleach and peroxide bleach. Peroxide bleach was introduced in the 1950s. Though it helps to remove stains, especially in higher wash temperatures, it will not bleach most colored materials and does not weaken fabrics, as does sodium hypochlorite bleach. Peroxide bleach does not disinfect and is commonly added to laundry detergents which are advertised as color-safe. It also has a longer shelf life than chlorine bleach. Peroxide bleach is more commonly used in Europe, where washing machines are manufactured with inner heating coils that can raise the water temperature to the boiling point. The more common form of household bleach in the U.S. is chlorine bleach. It is most effective in removing stains and disinfecting fabrics. Chlorine bleach is cheap to manufacture and effective in both warm and hot wash temperatures. However, it has strong chemical properties which can weaken textile fibers. 

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