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Cellulose Nanofibers (CNF) Reinforced Carbon Fiber/Epoxy Matrix Composite with Higher Mechanical Properties

SIDDHARTH BHAGANAGAR, PIAS KUMAR BISWAS, MANGILAL AGARWAL, HAMID DALIR

Abstract


The effect of the Cellulose Nanofibers (CNF) compositions, their morphology on carbon fiber, and subsequent mechanical properties have been explored in this work. The CNF composite nanofiber networks were introduced as interleave layers to improve the interlaminar shear strength (ILSS) of an epoxy/carbon fiber laminate composite. Dry carbon fiber was coated by different volume fractions of CNF (0.6wt%, 0.8wt%, 1wt%) through the sonication process. The CNFs volume fraction and delamination properties of enhanced carbon fiber reinforced polymer (CFRP) laminates have been studied. It is shown that when the dry carbon fiber was treated with CNF, the laminate shows greater mechanical strength in certain cases. The application of CNF composite nanofiber networks as an interleaved layer in an epoxy/carbon laminate increased the delamination resistance of the ILSS in both 0.8wt% and 1wt% CNF by 27.2% and 12.4% respectively, while compared to the neat control sample. This result suggests that CNF could enhance the delamination resistance of an epoxy/carbon laminate undergoing stress and deformation. This result is attributed to crack path modification, and load energy absorption by higher modulus CNFs reinforced nanofibers interleave in the laminate resulting in a higher shear modulus to the networks.


DOI
10.12783/asc37/36405

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