4.7 Article

Novel epoxy-based glass fiber reinforced composites containing compatibilized para-aramid fibers and silanized nanoclay for improved impact strength

期刊

POLYMER COMPOSITES
卷 43, 期 3, 页码 1357-1370

出版社

WILEY
DOI: 10.1002/pc.26453

关键词

compatibilization; composites; fibers; impact resistance; mechanical properties

资金

  1. Science and Engineering Research Board-DST, Government of India, New Delhi, India [EMR/2017/002990]

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This research developed a novel epoxy-based glass fiber reinforced composite with enhanced impact strength and tensile-flexural properties. Through surface modification and compatibilization, nanoclay and PA fibers effectively reinforced the composite materials.
This research developed epoxy-based glass fiber reinforced composite (GFRPs) containing multi-scale fiber reinforcement comprising of silanized nanoclay (nano-reinforcement) and compatibilized para-aramid (PA) fibers (micro-reinforcement) for enhanced impact strength and tensile-flexural properties. VARIM technique was used for fabrication of GFRPs. Surface modification (silanization) of nanoclay was confirmed by FTIR and that of PA fibers was confirmed by SEM-EDS and FTIR. Dispersion/morphology of nanoclay in the processed nanocomposites was determined by XRD and TEM analysis. Three different methods were used for the compatibilization of PA fibers. All methods exhibited a substantial increase in impact strength without a decrease in flexural/tensile strength. Nanocomposite containing 1.0 phr MAH treated PA fibers and 2 phr silanized nanoclay showed the highest improvement in impact strength (34% higher than the reference composite) along with minor improvements in tensile strength (6%), and flexural modulus (13%). SEM micrographs of the fractured surface of impact test samples were used to identify the mechanisms/reasons for the improved mechanical performance of the newly developed GFRPs.

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