可定制的碳纳米管陶瓷纳米复合材料。

Customizable Ceramic Nanocomposites Using Carbon Nanotubes.

机构信息

Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK.

H.E.J. Research Institute of Chemistry, International Centre for Chemical and Biological, Sciences, University of Karachi, Karachi 75270, Pakistan.

出版信息

Molecules. 2019 Sep 1;24(17):3176. doi: 10.3390/molecules24173176.

DOI:10.3390/molecules24173176

PMID:31480573

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6749371/

Abstract

A novel tweakable nanocomposite was prepared by spark plasma sintering followed by systematic oxidation of carbon nanotube (CNT) molecules to produce alumina/carbon nanotube nanocomposites with surface porosities. The mechanical properties (flexural strength and fracture toughness), surface area, and electrical conductivities were characterized and compared. The nanocomposites were extensively analyzed by field emission scanning electron microscopy (FE-SEM) for 2D qualitative surface morphological analysis. Adding CNTs in ceramic matrices and then systematically oxidizing them, without substantial reduction in densification, induces significant capability to achieve desirable/application oriented balance between mechanical, electrical, and catalytic properties of these ceramic nanocomposites. This novel strategy, upon further development, opens new level of opportunities for real-world/industrial applications of these relatively novel engineering materials.

摘要

一种新型可调谐纳米复合材料通过火花等离子烧结制备，然后对碳纳米管（CNT）分子进行系统氧化，以在氧化铝/碳纳米管纳米复合材料表面产生多孔性。对其机械性能（弯曲强度和断裂韧性）、比表面积和电导率进行了表征和比较。通过场发射扫描电子显微镜（FE-SEM）对纳米复合材料进行了广泛分析，以进行二维定性表面形态分析。在不显著降低致密化程度的情况下，将 CNT 添加到陶瓷基质中并对其进行系统氧化，可显著提高这些陶瓷纳米复合材料在机械、电气和催化性能方面的可实现性/应用导向平衡能力。这种新颖的策略，在进一步发展后，为这些相对较新的工程材料在实际/工业应用中开辟了新的机会。