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Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...

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循环碳纳米管生产用于先进的结构纤维应用.

Xiao Sun1, Di Chang1, Varunkumar Thippanna2

  • 1Department of Mechanical and Industrial Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.

ACS applied materials & interfaces
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概括

研究人员开发了一种具有成本效益的方法,从塑料废物中制造多壁碳纳米管 (MWCNT). 这些新型的MWCNT增强了聚烯二 (PAN) 复合纤维,为先进的制造和减少废物提供了可持续的解决方案.

关键词:
碳纳米管的使用方法化学蒸气沉积 化学蒸气沉积聚烯二烯酸纤维的纤维.在消费后的塑料塑料.不钢催化剂的使用

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学

背景情况:

  • 塑料废物对环境构成重大挑战,回收率有限.
  • 将塑料再循环转化为先进材料是一种可持续的废物管理和资源利用方法.

研究的目的:

  • 从消费后塑料废物中合成多壁碳纳米管 (MWCNTs) 的成本效益高的方法.
  • 使用这些废弃物衍生的MWCNT和多烯 (PAN) 制造高性能复合纤维.

主要方法:

  • 催化化学蒸汽沉积 (CCVD) 用于从消费后塑料中合成MWCNT.
  • 合成的MWCNTs通过湿将其纳入PAN中,以创建复合纤维.

主要成果:

  • 与商业CNT相比,来自废弃物的MWCNT含有较低的金属含量和66%的增强晶度.
  • 由此产生的PAN-MWCNT复合纤维的扬氏模量为13.4 GPa,拉伸强度为941 MPa.
  • 由于合成的MWCNTs,观察到复合材料完整性的改善和缺陷的减少.

结论:

  • 这项研究提出了一种可持续的双重效益方法:塑料废物减排和高价值碳纳米材料的生产.
  • 开发的方法为制造用于航空航天,汽车和能源应用的轻量级高性能纤维提供了可行的途径.