Coverting Scrapped Car Plastic Waste into Graphene
Flash Joule加热过程将塑料从寿命末福特卡车中回收到新车的高价值石墨烯中
The part of an old car that gets turned into graphene could come back as a better part for a new car.
与福特汽车公司研究人员合作的莱斯大学化学家正在通过大学的闪光焦耳加热工艺将塑料零件从“寿命末”车辆转变为石墨烯。
平均SUV最多包含350公斤（771磅）的塑料
赖斯化学家James Tour和研究生兼首席作家Kevin Wyss领导的该项目的目标是重复使用该石墨烯，以制造增强的新车聚氨酯泡沫。测试表明，注入石墨烯的泡沫的拉伸强度增加了34％，低频吸收噪声增加了25％。仅重量或更少的石墨烯，只有0.1％。
当那辆新车旧时，可以将泡沫再次闪烁到石墨烯中。
Tour说：“福特从车辆切碎设施中向我们发送了10磅混合塑料废物。”“这是泥泞而湿的。我们刷新了它，我们将石墨烯寄回了福特，他们将其放入了新的泡沫复合材料中，并完成了应该做的一切。
“Then they sent us the new composites and we flashed those and turned them back into graphene,” he said. “It’s a great example of circular recycling.”
Hundreds of different combinations of plastic resin, filler and reinforcements on vehicles make the materials very difficult to separate.Flash Joule heating to make graphene, introduced by the Tour lab in 2020, packs mixed ground plastic and a coke additive (for conductivity) between electrodes in a tube and blasts it with high voltage. The sudden, intense heat -- up to nearly 5,000 degrees Fahrenheit -- vaporizes other elements and leaves behind easy-to-solubilize, turbostratic graphene.
Flash加热可提供重大的环境优势，因为该过程不需要溶剂，并且使用最少的能量来生产石墨烯。
为了测试是否可以改造生命末，混合塑料，稻米实验室将碎屑粉碎机“绒毛”碎片，由塑料保险杠，地毯，垫子，垫子，座椅和门壳从寿命末F-150皮卡车制成在不洗或预先分类组件的情况下进行细粉。
实验室将粉末分为两个步骤，首先在低电流下，然后在加热器Wyss中高电流定制为实验设计。
Powder heated between 10 to 16 seconds in low current produced a highly carbonized plastic accounting for about 30 percent of the initial bulk. The other 70% was outgassed or recovered as hydrocarbon-rich waxes and oils that Wyss suggested could also be recycled.
然后将碳化塑料进行高电流闪光，将其85％转化为石墨烯，同时超过氢，氧气，氯，硅和痕量金属杂质。
生命周期分析涉及将石墨烯从闪烁的汽车零件与其他方法产生的石墨烯进行比较，并评估回收效率。他们的结果表明，与其他方法相比，闪光灯焦耳加热产生的石墨烯可大大减少能量，温室气体排放和用水量，甚至包括减少塑料碎片绒毛所需的能量。
Graphene has a future at Ford. The company first introduced it into a variety of other under-the-hood components and in 2020 added a graphene-reinforced engine cover. Kiziltas said the company expects to use it to reinforce hard plastics as well.
资料来源：莱斯大学
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