4.8 Article

Tailoring Interfacial Properties by Controlling Carbon Nanotube Coating Thickness on Glass Fibers Using Electrophoretic Deposition

期刊

ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 2, 页码 1501-1510

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10903

关键词

electrophoretic deposition; multiwall carbon nanotubes; microdroplet; interface; glass fiber

资金

  1. Div Of Civil, Mechanical, & Manufact Inn
  2. Directorate For Engineering [1254540] Funding Source: National Science Foundation

向作者/读者索取更多资源

The electrophoretic deposition (EPD) method was used to deposit polyethylenimine (PEI) functionalized multiwall carbon nanotube (CNT) films onto the surface of individual S-2 glass fibers. By varying the processing parameters of EPD following Hamakers equation, the thickness of the CNT film was controlled over a wide range from 200 nm to 2 mu m. The films exhibited low electrical resistance, providing evidence of coating uniformity and consolidation. The effect of the CNT coating on fiber matrix interfacial properties was investigated through microdroplet experiments. Changes in interfacial properties due to application of CNT coatings onto the fiber surface with and without a CNT-modified matrix were studied. A glass fiber with a 2 mu m thick CNT coating and the unmodified epoxy matrix showed the highest increase (58%) in interfacial shear strength (IFSS) compared to the baseline. The increase in the IFSS was proportional to CNT film thickness. Failure analysis of the microdroplet specimens indicated higher IFSS was related to fracture morphologies with higher levels of surface roughness. EPD enables the thickness of the CNT coating to be adjusted, facilitating control of fiber/matrix interfacial resistivity. The electrical sensitivity provides the opportunity to fabricate a new class of sizing with tailored interfacial properties and the ability to detect damage initiation.

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