17年8月9日
能源部的研究人员根据www.plasticstoday.com，通过将纳米颗粒与聚合物材料混合在一起，发现了一种令人惊讶的方法来改善聚合物的性质。A team of scientists led by the DoE’s Oak Ridge National Laboratory (ORNL) were studying the role of polymer structure, the interaction between nanoparticles and polymer, and nanoparticle size and shape on the structure, dynamics, and macroscopic properties of polymer nanocomposites, which are used in numerous applications.
了解这些效果将使该团队（包括伊利诺伊州伊利诺伊州伊利诺伊州）的研究人员（伊利诺伊州）和田纳西大学诺克斯维尔大学（UTK）都可以改善新的复合聚合物的设计，因为它们可以调整机械机械，化学，电气，光学和热性能。特别是，该团队试图验证纳米颗粒的大小会对聚合物纳米复合材料的机械性能产生不利影响，但根据ORNL和UTK的研究人员Alexei Sokolov表示，他们完全学到了其他东西。他告诉他说：“我们期望纳米颗粒应如何影响纳米复合材料的宏观特性有限制。”Design News. “And at the nanoparticle size, we expected either no effect or deterioration of nanocomposite properties. We got a surprise.”
研究人员了解到的不是必须存在最佳的纳米颗粒大小，这就是他们认为会发现的。索科洛夫说，相反，他们发现搬到真正的小纳米颗粒使他们能够访问全新的物业。这不是由于大小而导致的，而是因为小颗粒的移动速度比大颗粒的移动速度快，并且与同一链上的聚合物段相互作用。更多的聚合物片段粘在大型纳米颗粒上，使链条与该纳米颗粒的解离很困难。
“Now we realize that we can tune the mobility of the particles—how fast they can move, by changing particle size, and how strongly they will interact with the polymer, by changing their surface,” Sokolov said. “We can tune mobility of nanoparticles—e.g. their weight and size—and we can also tune the time of nanoparticle-polymer dissociation by tuning strength of their interactions.” Both of these parameters affect macroscopic properties drastically, he said. “It was not possible to tune these parameters in the required range with larger nanoparticles, and this is probably the reason nobody actually tried it earlier,” Sokolov said.
以前的新闻
下一个新闻
{{comment.datetimestampdisplay}}}
{{comment.comments}}