一种由硅氧烷制成的“再造皮肤”薄膜，可以在几秒钟之内消除皱纹和眼袋。哈佛大学和麻省理工学院的科学家近日在《自然材料》上发表了这项产品的测试研究，在相关调查中，尚没有发炎或过敏反应。薄膜可使用超过一天的时间，有望通过美国食品药品监督管理局的市场检测。

　　这个想看看起来很新奇，一个不可见得薄膜就可以让你的皮肤返老还童，眼袋秒没，皱纹消失。

　　来自哈佛大学和麻省理工的科学家觉得这并不是异想天开。研究人员在自然杂志上发表的文章指出这种组成第二皮肤的材料经研究是被FDA认定是安全的。目前为止并没有人反应使用了这个材料出现了刺激或是过敏。

　　当眼袋出现时，可以将敷薄膜处抹上防晒霜，以确保薄膜不会因为汗水或是其他水脱落。研究人员有望将此种方法用于湿疹、牛皮癣等其他因为缺失水分的皮肤状况，可以使用薄膜使皮肤保持水分和光滑。

　　薄膜的化学材料是硅氧烷，由一个氧原子和两个硅原子组成一个长链的重复化合物。研究人员做了大量实验以达到期待的效果。研究发现这个皮肤可以持续超过一天。

　　The idea sounds like fantasy: an invisible film that can be painted on your skin and give it the elasticity of youth. Bags under the eyes vanish in seconds. Wrinkles disappear.

　　Scientists at Harvard and MIT have discovered that it is not fantasy at all. Reporting on Monday in the journal Nature Materials on pilot studies with 170 subjects, the researchers say a “second skin” composed of commonly used chemicals deemed safe by the Food and Drug Administration can accomplish that — and in small studies of it, so far no one has reported irritation or allergic reactions.

　　Undereye bags are just the start. You can soak the film with sunscreen and protect yourself without worrying about sweat or water washing it away, researchers said. They expect it can be used to treat eczema, psoriasis and other skin conditions by covering dry itchy patches with a film that moistures and soothes.

　　The chemicals are siloxanes — their basic form is one atom of oxygen linked to two atoms of silicon — which form polymers, long chains of repeating units. The researchers made a large collection of them by modifying molecular features such as the chain length to get the ones with the properties they wanted. The “skin” can last for more than a day.