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  1. Improving the interfacial and mechanical properties of short glass fiber/epoxy composites by coating the glass fibers with cellulose nanocrystals

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    Author(s): A. Asadi; M. Miller; Robert Moon; K. Kalaitzidou
    Date: 2016
    Source: Express Polymer Letters, Vol. 10(7): 11 pages.: 587-597.
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    DOI: https://doi.org/10.3144/expresspolymlett.2016.54
    PDF: View PDF  (2.0 MB)

    Description

    In this study, the interfacial and mechanical properties of cellulose nanocrystals (CNC) coated glass fiber/epoxy composites were investigated as a function of the CNC content on the surface of glass fibers (GF). Chopped GF rovings were coated with CNC by immersing the GF in CNC (0–5 wt%) aqueous suspensions. Single fiber fragmentation (SFF) tests showed that the interfacial shear strength (IFSS) increased by ~69% in composites produced with CNC coated GF as compared to uncoated GF, suggesting an enhancement of stress transfer across the GF/matrix interface. The role of CNC coatings on the tensile, flexural, and thermo-mechanical properties of the CNC-coated GF/epoxy composites was investigated. Incorporation of 0.17 wt% CNC in the composite resulted in increases of ~10% in both elastic modulus and tensile strength, and 40 and 43 % in flexural modulus and strength respectively. In conclusion CNC coatings on GF alter the GF/matrix interface resulting in improvement of the mechanical performance of the corresponding composites.

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    Citation

    Asadi, A.; Miller, M.; Moon, R.J.; Kalaitzidou, K. 2016. Improving the interfacial and mechanical properties of short glass fiber/epoxy composites by coating the glass fibers with cellulose nanocrystals. Express Polymer Letters. 10(7): 587-597.

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    Keywords

    polymer composites, nanomaterials, coatings, mechanical properties

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