2021
DOI: 10.1016/j.triboint.2021.106910
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Long-term salt-water durability of GNPs reinforced basalt-epoxy multiscale composites for marine applications

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Cited by 30 publications
(34 citation statements)
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“…Based on leveraging thermal, mechanical, and structural characterizations in a complimentary manner, the proposed degradation mechanism for the CF/PEKK composite due to the hydrothermally aging process are schematically depicted in Figure 9. Free water molecules at the surface diffuse into thermoplastic polymer and as such accumulate in defect sites such as voids and surface micro‐cracks which are often unavoidably created during the manufacturing process 38 . The free water molecules are then predominantly absorbed by the amorphous phase of the semi‐crystalline PEKK matrix thereby leading to inhomogeneous water absorption within the composite structure.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Based on leveraging thermal, mechanical, and structural characterizations in a complimentary manner, the proposed degradation mechanism for the CF/PEKK composite due to the hydrothermally aging process are schematically depicted in Figure 9. Free water molecules at the surface diffuse into thermoplastic polymer and as such accumulate in defect sites such as voids and surface micro‐cracks which are often unavoidably created during the manufacturing process 38 . The free water molecules are then predominantly absorbed by the amorphous phase of the semi‐crystalline PEKK matrix thereby leading to inhomogeneous water absorption within the composite structure.…”
Section: Resultsmentioning
confidence: 99%
“…Free water molecules at the surface diffuse into thermoplastic polymer and as such accumulate in defect sites such as voids and surface micro-cracks which are often unavoidably created during the manufacturing process. 38 The free water molecules are then predominantly absorbed by the amorphous phase of the semi-crystalline PEKK matrix thereby leading to inhomogeneous water absorption within the composite structure. This inhomogeneous water absorption causes localized matrix plasticization as schematically illustrated in Figure 9.…”
Section: Scanning Electron Microscopymentioning
confidence: 99%
“…The specific performance was as follows: the loss temperature curves of the three blends with salt aging have only one peak, and the Tg value of 20% 2021P/DGEBA was the largest, reaching 140.44 • C, followed by 10% 2021P/DGEBA, the Tg value was 132.97 • C. The Tg value of 0% 2021P/DGEBA was greatly reduced, which was 122.99 • C. Yoon et al [32] discovered that the Tg of carbon/epoxy resin composites in 5% NaCl saline environment for one month was 95 • C, which decreased by 10.3 • C compared with that before aging, similar to the Tg change of DGEBA in saline environment in this paper. The test phenomenon in this paper was that after 28 days of aging in salt medium, the molecular chain of DGEBA was relaxed and most of the molecular chains of functional groups were broken, resulting in the increase of molecular free volume [33]. Additionally, water entering the resin increases the distance between molecular chains and weakens the interaction between molecular chains, enhanced the motion ability of molecular chains and decreased Tg.…”
Section: Dynamic Mechanical Analysis (Dma)mentioning
confidence: 98%
“…The experimental result of Sukur, EF., and Gurol O. 58 reveal that the presence of graphene nanoparticles at a concentration of 0.3% by weight improves the tensile properties of the composite; however, the tensile performances of the composite degrade when exposed to saltwater for a long period. Besides, Dipak K. and Ramesh K. 59 investigate the effect of stacking sequence on the mechanical behavior of carbon and glass fiber hybrid composites under seawater conditions.…”
Section: Introductionmentioning
confidence: 99%