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>>碳纳米管纤维没有极限:水稻实验室为工业提供高性能碳纳米管纤维

The cross section of a fiber produced at Rice University contains tens of millions of carbon nanotubes. The lab continually improves its method to make fibers, which tests show are now stronger than Kevlar. (Credit: Pasquali Research Group/Rice University)
The cross section of a fiber produced at Rice University contains tens of millions of carbon nanotubes. The lab continually improves its method to make fibers, which tests show are now stronger than Kevlar. (Credit: Pasquali Research Group/Rice University)

Abstract:
Carbon nanotube fibers made at Rice University are now stronger than Kevlar and are inching up on the conductivity of copper.

对于碳纳米管纤维没有限制:水稻实验室为工业提供高性能碳纳米管纤维

Houston, TX | Posted on August 17th, 2020

在碳中报道了化学和生物分子工程师Matteo Pasquali的稻米实验室,它已经通过湿纺丝工艺制造了其最强大,最具导电纤维,由长碳纳米管制成。

In the new study led by Rice graduate students Lauren Taylor and Oliver Dewey, the researchers noted that wet-spun carbon nanotube fibers, which could lead to breakthroughs in a host of medical and materials applications, have doubled in strength and conductivity every three years, a trend that spans almost two decades.

虽然这可能永远不会模仿Moore��法,但为计算机芯片的基准进行了几十年来,Pasquali和他的团队正在进行他们开展他们开创性的方法以制造碳纳米管纤维的方法。

The lab�s threadlike fibers, with tens of millions of nanotubes in cross section, are being studied for use as bridges to repair damaged hearts, as electrical interfaces with the brain, for use in cochlear implants, as flexible antennas and for automotive and aerospace applications.

They are also part of the Carbon Hub, a multiuniversity research initiative launched in 2019 by Rice with support from Shell, Prysmian and Mitsubishi to create a zero-emissions future.

�碳纳米管纤维长期以来一直吹捧其潜在的优势特性,�Pasquali说。�TWO几十年的水稻和其他地方的研究已经使这潜在的现实。现在我们需要全球努力提高生产效率,因此这些材料可以用零二氧化碳排放和潜在的清洁氢的同时生产。

�本文的目的是提出备案properties of the fibers produced in our lab,� Taylor said. �These improvements mean we�re now surpassing Kevlar in terms of strength, which for us is a really big achievement. With just another doubling, we would surpass the strongest fibers on the market.�

柔性米纤维的拉伸强度为4.2只千兆卡斯卡(GPA),而Kevlar纤维的3.6GPa相比。纤维需要具有高结晶度的长纳米管;也就是说,常规的碳原子环围绕着几种缺陷。Dewey说,水稻工艺中使用的酸性溶液还有助于减少可以干扰纤维强度的杂质,并通过残留掺杂增强纳米管金属性能。

�纳米管的长度或纵横比是驱动我们纤维中性质的定义特性,�HE他说,注意到水稻纤维中使用的12微米纳米管的表面积有助于更好的范德华粘合剂。�还有助于通过控制来自催化剂的金属杂质的数量以及我们称之为无定形碳杂质,优化纳米管的合作者优化解决方案处理。

研究人员表示,每米的纤维纤维导电性改善了10.9兆兆门(百万西门子)。�这是第一次碳纳米管纤维通过10兆纤维阈值,因此我们达到了纳米管纤维的新级,杜威说。他说,米纤维的重量归一化,达到铜电导率的约80%。

�But we�re surpassing platinum wire, which is a big achievement for us,� Taylor said, �and the fiber thermal conductivity is better than any metal and any synthetic fibers, except for pitch graphite fibers.�

The lab�s goal is to make the production of superior fibers efficient and inexpensive enough to be incorporated by industry on a large scale, Dewey said. Solution processing is common in the production of other kinds of fibers, including Kevlar, so factories could use familiar processes without major retooling.

�我们方法的好处是它基本上是即插即用,�他说。��本身可扩展,并配合合成纤维已经制作的方式。

�There's a notion that carbon nanotubes are never going to be able to obtain all the properties that people have been hyping now for decades,� Taylor said. �But we're making good gains year over year. It�s not easy, but we still do believe this technology is going to change the world.�

Co-authors of the paper are Rice alumnus Robert Headrick; graduate students Natsumi Komatsu and Nicolas Marquez Peraca; Geoff Wehmeyer, an assistant professor of mechanical engineering; and Junichiro Kono, the Karl F. Hasselmann Professor in Engineering and a professor of electrical and computer engineering, of physics and astronomy, and of materials science and nanoengineering. Pasquali is the A.J. Hartsook Professor of Chemical and Biomolecular engineering, of chemistry and of materials science and nanoengineering.

美国空军办公室科研办公室,罗伯特A. Welch基金会,能源部先进的制造办公室和先进的研究项目代理能源支持这项研究。

####

关于赖斯大学
Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation�s top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,962 undergraduates and 3,027 graduate students, Rice�s undergraduate student-to-faculty ratio is just under 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice is ranked No. 1 for lots of race/class interaction and No. 4 for quality of life by the Princeton Review. Rice is also rated as a best value among private universities by Kiplinger�s Personal Finance.

通过Twitter @RiceUnews跟随米新闻和媒体关系。

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阅读摘要:

Engineers make first pure nanotube fibers:

New nanotech fiber: Robust handling, shocking performance:

Pasquali Research Group:

Carbon Hub:

乔治·r·布朗工程学院:

Wiess School of Natural Sciences:

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