Optical characterization of nanosilica-filled bisphenol-F epoxy and carbon fiber composites

Chindam Chandraprakash, Aniruddh Vashisth, Thiruvelu Bhuvana, Charles E. Bakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this investigation, we examined the effect of curing agents and carbon fiber on the color of epoxy-based composites with varying percentages of nanosilica (NS) as filler. Composites with different concentrations of NS were prepared using a derivative of bisphenol F (bisF) epoxy, cured with diethyl-toluene-diamine (DETDA) or 4,4’- Diaminodiphenylsulfone (DDS), along with carbon fiber composites with bisF and DETDA. The variations of color across samples were correlated to the reflectance in the UV-Vis regimes. We found that curing of samples by DETDA, rather than DDS, leads to higher reflectance in the UV-Vis regimes and almost no effect in the NIR regime. Increments in reflectance within the visible regime are proportional to the NS concentration, whereas such proportionality is not observed in the NIR regime. Reflectance up to 45% is observed initially on addition of 15 wt% NS in both epoxies in NIR spectrum, but further NS addition does not increase reflectance. While the addition of carbon fibers increases mechanical properties, we found their addition makes the composites vulnerable to photodegradation. While the addition of carbon fibers increases mechanical properties, we found their addition makes the composites vulnerable to photodegradation.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 35th Technical Conference, ASC 2020
EditorsKishore Pochiraju, Nikhil Gupta
PublisherDEStech Publications
Pages268-279
Number of pages12
ISBN (Electronic)9781605956657
StatePublished - 2020
Event35th Annual American Society for Composites Technical Conference, ASC 2020 - Virtual, Online
Duration: Sep 14 2020Sep 17 2020

Publication series

NameProceedings of the American Society for Composites - 35th Technical Conference, ASC 2020

Conference

Conference35th Annual American Society for Composites Technical Conference, ASC 2020
CityVirtual, Online
Period9/14/209/17/20

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Fingerprint Dive into the research topics of 'Optical characterization of nanosilica-filled bisphenol-F epoxy and carbon fiber composites'. Together they form a unique fingerprint.

Cite this