科学美国人60秒 SSS 2016-1-1
时间：2019-01-20 作者：英语课 分类：2016年Scientific American(一)月
英语课
Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside.
"This is not very economical because salt is mainly corrosive", says Ackislo, a chemical engineer at Koachy Universityin Istanbul, Turkey.She says salt's corrosive effects don't discriminate. They affect cars, vehicles and also foreign nature, plants' microorganisms. She and her colleagues designed a road subsance that can deice itself.They started with a polymer called SPS,commonly added to stengthen the asphalt.They whipped up a ? of SPS with ?,an alternative salt that has been studied as an more environmentally deicer than regular road salt.And then they added that emosion to bitumen,the sticky black stuff in asphalt.Thy subjected their creation and regular bitumen to winter weather conditions that typically lead to black ice. It turns out that the hybrid compound delayed ice formation ten minuteds longer than the control.And the samples continue to release salt for more than two months.The study is in the journal Industrial and Engineer Chemistry Research. Of course ten minutes of deicing is a nice headstart,but it's not going to put salt drivers out of business.
But we are saying is that during the first ten,fifteen minutes when the road becomes very icy, this material and this release of salt from this functional bitemun is going to be very useful and potentially eliminate many accidents on the road.
The next step,she says, is to pave a test service and drive on it to literally see what happens when the rubber meets the road.