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主题:PEF生物基塑料有潜力解决PET引起的问题

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PEF生物基塑料有潜力解决PET引起的问题  发帖心情 Post By:2018-08-06 22:42:00 [只看该作者]


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Published on 2018-08-02.  

PEF bioplastic could solve some of the problems caused by PET. The lengthy and energy-intensive production process has so far prevented mass production. ETH Zurich researchers have now developed a method that could finally make the PEF marketable.

PEF可能会解决PET引起的一些问题。冗长而能量密集的生产工艺目前妨碍了PEF的批量化生产。ETH苏黎世研究人员现在开发了一种方法,可能会最终使得PEF市场化。

The problem of plastic is on everyone's lips. Every year, some 50 million tons of polyethylene terephthalate (PET) alone are produced, and the trend is rising. Since recycling is usually cost-intensive and technologically difficult to implement, a great deal of plastic waste ends up in the oceans or is incinerated, causing massive CO2 emissions. The use of crude oil in production is also problematic. However, none of us can do without plastic entirely.

塑料问题是我们的日常话题。每年,仅聚对苯二甲酸乙二醇酯(PET)就有生产了6千万吨,而且呈现出上升趋势。由于回收通常是成本密集和技术密集,难以实现,大量的塑料废物散布于海洋或被焚烧。



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  发帖心情 Post By:2018-08-06 22:46:00 [只看该作者]


图片点击可在新窗口打开查看此主题相关图片如下:handling plastic waste.jpg
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  发帖心情 Post By:2018-08-06 22:54:00 [只看该作者]

 

Reducing Negative Environmental Impact of Plastic

减少负面塑料的负面影响


Jan-Georg Rosenboom, a fresh PhD graduate in the research group of ETH professor Massimo Morbidelli at the Department of Chemistry and Applied Biosciences, said:
"Polymers and plastics are very useful materials that make a wide range of everyday applications possible in the first place. Lighter cars, smartphones, modern clothes and many medical devices would not exist if we hadn't invented polymers. The question is how we can reduce the negative environmental impact of plastic while maintaining its benefits for our society."

 

Jan-Georg Rosenboom,是ETH苏黎世大学化学和应用生物科学系的r Massimo Morbidelli教授研究团队的一个新入学的博士研究生,他说:

“聚合物和塑料是非常有用的材料,有着宽范围的日常应用,很可能是第一位的应用。假如我们没有发明聚合物,更轻的汽车、智能手机、现代服装和许多医疗设备都无从谈起。问题是,我们如何能减少塑料对环境的负面影响而保持其对于我们社会的好处。”


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  发帖心情 Post By:2018-08-06 22:55:00 [只看该作者]

 

Bioplastics or Biobased Polymers

生物基塑料或者生物基聚合物


One answer could be biobased polymers, so-called bioplastics. These have very similar properties to conventional plastics, but are made from plant-based raw materials instead of crude oil. Some bioplastics are also biodegradable and enable better composting.

 

一个答案可能是生物基聚合物,也就是所谓的生物基塑料。这些生物基塑料有着与传统塑料很类似的性质,但是它们是用植物基原材料而不是原油制造的。一些生物基塑料也是生物降解的,可以更好分解。


Promising Bioplastic - Polyethylene Furanoate (PEF)

有希望的生物基塑料-聚呋喃二酸乙二醇酯(PEF


Massimo Morbidelli's group is investigating a promising bioplastic called polyethylene furanoate (PEF).

 

 Massimo Morbidelli的团队正在研究一种有希望的生物基塑料,叫做聚呋喃二酸乙二醇酯(PEF)。

·         PEF is chemically very similar to PET, but consists of 100% renewable raw materials such as forestry and agricultural wastes. 

·         PEF在化学上非常类似于PEF,但是是由100%可再生原材料构成的,例如林业和农业废弃物物。

·         PEF bottles, for example, require less material, are lighter and more stable than their PET competitors and make beverages last longer.

·         例如,PEF瓶使用较少的材料,比PET更轻更稳定,可以使饮料寿命更长。 

·         Although PEF is not biodegradable, it can be incinerated in an environmentally friendly manner besides recycling, as no additional CO2 emissions are produced.

·         尽管PEF不是生物降解的,但是,它除了可以回收外,还可以以环境友好的方式被焚烧,而且没有额外的CO2排放。


The fact that PEF has not yet been able to establish itself on the market is primarily due to its time- and energy-intensive production. The ETH doctoral students Jan-Georg Rosenboom and Peter Fleckenstein, together with ETH professor Giuseppe Storti, have now developed a method that could enable the commercial breakthrough of PEF. 

 

PEF尚未名乎塑料江湖的事实,主要是由于其耗时耗能的生产工艺。ETH博士研究生Jan-Georg Rosenboom和Peter Fleckenstein, 与 ETH 教授 Giuseppe Storti一起,现在开发了一种方法,有可能实现PEF的商业突破。


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  发帖心情 Post By:2018-08-06 22:56:00 [只看该作者]


图片点击可在新窗口打开查看此主题相关图片如下:pef bioplastic.jpg
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PEF bioplastics are indistinguishable from 
conventional PET on the outside


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  发帖心情 Post By:2018-08-06 22:57:00 [只看该作者]

 

 

Energy-efficient and Fast Production

高能效和快速生产

 

Jan-Georg Rosenboom explained:
"Our method reduces production time from several days to a few hours. In addition, discoloration in the end product can be avoided in contrast to previous processes. Instead of making the usual "rope-like" polymer chains with two end points react, we first tie rings from the latter, which thus have no ends anymore. These rings can then be polymerized to PEF much more quickly and in a controlled manner. This is because no chemical by-products are produced and have to be removed, when the rings are opened and connected to form the final long "polymer rope". The very fast reaction within minutes enables PEF products that are superior in material properties to PET and reduces energy requirements.”

 

 

Jan-Georg Rosenboom解释说,“我们的方法减少了生产时间,从几天到几个小时。此外,与之前的工艺相比,终端产品的变色也可以避免。我们不是使通常的“索状”聚合物链在两端点反应,我们首先把两端点打结成环,这样分子链就不再有端点。这些环以更快的速度聚合成PEF,而且可控。这是由于在开环聚合、连接形成长最终的长聚合物索的时候,没有化学副产品生成和需要除去。数分钟之间的甚快反应使得PEF产品在材料性能上优于PET,并减少了能耗需求。


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  发帖心情 Post By:2018-08-06 22:58:00 [只看该作者]

 

Advantages of New Method

新方法的优点


In addition, the method of ring opening allows a precise adjustment of the product quality, which was not possible with the previous production process. Thus, the new method could also be interesting for the production of other types of plastics and bioplastics. Due to its good material properties, the PEF could possibly also replace multilayer materials that are difficult to recycle.

 

此外,开发方法允许对产品质量进行精确调整,而这在先前的工艺中是不可能的。这样,新的方法还可能有利于生产别的类型的塑料和生物基塑料。由于其具有良好的材料性能,PEF还可能取代难于回收的多层材料。

Currently, the scientists are working with Sulzer to investigate how the new process could be implemented in industrial mass production. Despite the many advantages offered by PEF, it cannot solve all existing problems on its own, says Rosenboom, stressing: "Education and an improved awareness of how to handle plastics will continue to be crucial in order to stop the increasing environmental pollution. However, progress in manufacturing and recycling technologies will facilitate the transition towards a sustainable society".  

 

目前,这些科学家正在与Sulzer(苏尔寿)合作,研究如何将这个新工艺在工业化批量生产中实现。尽管PEF具有诸多优点,它也不可能凭一己之力解决现有的所有问题,Rosenboom说,并强调:“为了阻止不断增加的环境污染,教育和提高的如何处理塑料的意识将继续成为关键。但是,制造和回收技术的进步将有利于转向可持续的社会。”


Source: ETH Zurich


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