Enhanced extreme temperature bending and delamination resistance of GFRP composites through z-directional aligned nano-reinforcement: Emphasizing the effects of CNT functionalization

Fulmali, Abhinav Omprakash; Patnaik, Satyaroop; Rathore, Dinesh Kumar; Bhattacharjee, Debashish; Gwalani, Bharat; Ray, Bankim Chandra; Prusty, Rajesh Kumar

doi:10.1016/j.compscitech.2023.110272

Cited by 8 publications

(1 citation statement)

References 75 publications

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“…However, despite their versatility, SMPs encounter limitations due to their relatively slow recovery rate, delayed response times, lower recovery stress, and reduced cycle life [16]. Also, epoxy-based SMP exhibit limitations in load-bearing capacity, toughness, thermal stability and they are inherently brittle and susceptible to rapid crack propagation [17][18][19]. These constraints necessitate further research and development to enhance the performance and broaden the applicability of SMP-based materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of dual dispersion of carbon fiber and silica nanoparticles on recovery performance of shape memory epoxy

Yadav,

Das,

Badardinni

et al. 2024

Smart Mater. Struct.

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Shape memory polymers (SMP) are utilized in diverse fields, including deployable structures and components, owing to their advantageous properties like low density, cost-effectiveness, and ease of processing. The current study investigates the effect of dual dispersion of carbon fibers (CF) and silica nanoparticles (SN) on the recovery performance of shape memory epoxy composites. CF (0.25 wt.%) reinforced epoxy composite, SN (0.25 wt.%) reinforced epoxy composite, and dual (CF and SN 0.25 wt.% each) dispersed epoxy composite were developed using magnetic stirring and ultrasonic mixing to study the mechanical properties and shape memory behaviour. Flexural strength, tensile strength and fracture toughness of pristine epoxy was found to be 134.38 MPa, 52.15 MPa and 1.91 MPa∙m1/2, respectively. The addition of CF resulted in a flexural strength of 135.70 MPa and a tensile strength of 53.01 MPa, while the incorporation of SN led to a flexural and tensile strength of 138.40 MPa and 53.69 MPa, respectively. The fracture toughness of composites after adding CF and SN was found to be 2.22 MPa∙m1/2 and 2.39 MPa∙m1/2, respectively. With dual dispersion, the flexural strength of 139.82 MPa, tensile strength of 54.64 MPa, and fracture toughness of 2.75 MPa∙m1/2 were achieved. Dual dispersion has shown improved mechanical properties compared to single dispersion. The introduction of CF slightly decreased the shape fixity ratio (Rf) and shape recovery ratio (Rr) of the pristine epoxy from 98.67% and 96.62% to 96.67% and 95.15%, respectively. Similarly, the addition of SN further reduced these ratios to 98.00% and 91.83%, respectively. With a dual dispersion approach Rf and Rr were observed to be about 97.33% and 93.83%, respectively. The addition of fillers led to a reduction in Rf and Rr due to inhibition of polymeric chains, resulting in partial shape recovery. However, recovery time improved from 28 s to 23 s and 26 s with addition of CF and SN, respectively, in epoxy. With dual dispersion, a speedy recovery was achieved with a recovery time of 21 s. The findings of this study demonstrate the potential of dual dispersed fillers to improve the mechanical and shape memory properties of epoxy, which could find applications in the smart materials and structural engineering.

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Section: Introductionmentioning

confidence: 99%

Effect of dual dispersion of carbon fiber and silica nanoparticles on recovery performance of shape memory epoxy

Yadav,

Das,

Badardinni

et al. 2024

Smart Mater. Struct.

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Transverse tensile properties of laminar unidirectional carbon fiber‐reinforced polymers enhanced with multiscale fiber‐interleaving: Experiments and modeling

Lin,

Wang,

Guo

et al. 2024

Polymer Composites

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In this study, a micromechanics model, based on a hierarchical/gradient interface design, for predicting randomly hybrid carbon nanotube (CNT)/aramid pulp (AP) micro/nano‐fibers interleaved in a laminar unidirectional carbon fiber‐reinforced polymer (UD‐CFRP) is proposed. The model emphasizes the gradient interfaces that are formed in situ because of the graded penetration mechanisms of the CNT and AP. Additionally, via an experimental study, it is analytically verified that CNT/AP‐interleaving enhances the transverse tensile strength and modulus of the UD‐CFRP. The modeling and experimental results show a strong correlation. The increase in transverse tensile strength and modulus of the UD‐CFRP with CNT/AP hybrid interleaving and the associated hierarchical toughening mechanism are confirmed theoretically and experimentally. Furthermore, new insights into the multiscale toughening mechanisms of transverse tensile properties are obtained via systematic analysis. The hierarchical gradient interfacial structure formed by the penetration of CNT/AP‐interleaving and multiscale fiber‐bridging results in a transformation of the failure mechanism. Finally, the effects of the failure mechanism on model predictions and the applicability of micromechanical models are further discussed.Highlights A micromechanics modeling of UD‐CFRP with CNT/AP‐interleaving is proposed. The enhancements of CNT and AP are confirmed theoretically and experimentally. The contribution of CNT and AP to the properties of CFRP is theoretically verified. The effect of the hierarchical fiber‐bridging toughening mechanism is revealed.

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Development of nanophased synthetic fiber reinforced polymer composites: Prospects and Challenges

Kumar,

Ganesh Gupta K,

Prusty

2024

Synthetic and Mineral Fibers, Their Composites and Applications

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Enhanced extreme temperature bending and delamination resistance of GFRP composites through z-directional aligned nano-reinforcement: Emphasizing the effects of CNT functionalization

Cited by 8 publications

References 75 publications

Effect of dual dispersion of carbon fiber and silica nanoparticles on recovery performance of shape memory epoxy

Effect of dual dispersion of carbon fiber and silica nanoparticles on recovery performance of shape memory epoxy

Transverse tensile properties of laminar unidirectional carbon fiber‐reinforced polymers enhanced with multiscale fiber‐interleaving: Experiments and modeling

Development of nanophased synthetic fiber reinforced polymer composites: Prospects and Challenges

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