Mechanical and Thermodynamic Properties of Unidirectional Flax Fiber Reinforced CNT Modified Epoxy Composites

Wang, Hongguang; Yang, Lanjie; Guo, Huajie; Zhao, Yagebai; Zhao, Jianqing

doi:10.1007/s12221-019-8836-9

Cited by 26 publications

(11 citation statements)

References 37 publications

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“…COMPASS force field was the first quantum mechanics force field. − The simulation results of inorganic or organic systems in the COMPASS force field are consistent with the experimental results; ,,− therefore, the COMPASS force field was selected.…”

Section: Methodsmentioning

confidence: 89%

Directional Control of the Mechanical Properties of a Resin-Cross-Linking System: A Molecular Dynamics Study

Chen

et al. 2021

Ind. Eng. Chem. Res.

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Although thermosetting resins have good physical and chemical stabilities, their deformation ability is limited and fatigue fracture can easily occur. To overcome the defects of thermosetting resins, we propose introducing an aromatic heterocyclic helical macromolecule chain into a thermosetting resin-cross-linked network. The effect of the helical structure on the thermomechanical properties of the thermosetting resincured system is quantitatively and qualitatively analyzed using a molecular dynamics method. Results show that the helical structure can affect the mechanical properties of the thermosetting resin-cross-linked system along the pitch direction. The introduction of a helical macromolecule chain reduces the density of the cross-linking points and weakens the heat resistance of the cured system to some extent; however, the influence is insignificant. Nevertheless, we are expected to gain some deep insights into the directional control of the mechanical properties of the resin-curing system and microstructure of the cross-linking network by introducing a helical structure.

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Section: Methodsmentioning

confidence: 89%

Directional Control of the Mechanical Properties of a Resin-Cross-Linking System: A Molecular Dynamics Study

Chen

et al. 2021

Ind. Eng. Chem. Res.

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“…It can be seen that the mechanical properties of the alloy system cannot be improved by substituting Ni element for Zr element in the system except for the alloy with X = 10. In order to verify the effectiveness of the micro-structure and properties of the multi principal component HEA, the method proposed in [4,5] was used as the contrast object. The experimental results are shown in fig.…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…The micro-structure evolution is mainly related to the plane dislocation slip at relatively low deformation (up to 20%) or deformation twins and shear bands at high strain. In [5], the mechanical and thermodynamic properties of bisphenol F epoxy diglycidyl ether and flax fiber FRP composites modified by multi walled carbon nanotubes (MWCNT) were studied. The mechanical properties test showed that the tensile strength (48.7%) and tensile modulus (25.2%) of 1.0 wt.% MWCNT were significantly improved.…”

Section: Introductionmentioning

confidence: 99%

Structure and toughening mechanical properties of multi principal component high entropy alloy

Dai

2021

THERM SCI

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At present, the strength and toughening degree of the multi-principal element high entropy alloy are not high, and the plastic deformation capacity is poor. In order to solve this problem, the structure and mechanical properties of the multi-element high entropy alloy were studied. The micro-structure and strengthening mechanism of the alloy were studied. By establishing a reliable random solid solution model and using the first principle to calculate the phase structure, thermodynamics, and elastic properties of the alloy, theoretical guidance is provided for the design and development of new high entropy alloy. The high entropy alloy system with high specific strength and high tensile plasticity was prepared, and its strengthening and toughening mechanism was studied. The experimental results show that with the increase of Zr content, the fracture strength of multi-component high entropy alloy first increases and then decreases. When it reaches a fixed value, the comprehensive mechanical properties of the alloy are the best. Compared with the two literature methods, the tensile strength of this method is 250 MPa, and the work hardening after yielding makes the alloy have higher strength and better plastic deformation ability.

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“…Surface modification of natural fibers has recently attracted significant research interest for the improvement of compatibility and interfacial bond strength of composites [8]. Chemical modifications of lignocellulosic fiber, such as alkalization [9][10][11], benzoylation [12,13] and acetylation [14], and silane treatment [15,16] improve fiber strength by overcoming high water absorbance and low thermal stability [17]. Alkali treatment is widely used as it is the least expensive, most efficient, and most practical technique to improve the resistance of lignocellulose fiber to moisture compared to other chemical variants [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Acetylated Kenaf Fiber Composites

2021

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Bio-composites containing kenaf and starch as the filler and matrix, respectively, and Polyvinyl alcohol (PVA) and Polyethylene glycol (PEG) as plasticizers were fabricated. The acetylation of hydrophilic kenaf increased the hydrophobic matrix and surfactant bonding in the complex, and the starch matrix increased the biodegradability. The physical, thermal, and biodegradability properties of composites comprising acetylated kenaf and starch (S), acetylated kenaf, starch, and PVA (S+PVA), and acetylated kenaf, starch, and PEG (S+PEG) were evaluated. The results showed that the acetylation of kenaf caused its surface to swell, improving the interfacial adhesion between kenaf and starch in the composites, whereas PVA and PEG did not enhance the physical properties of the composites. The addition of plasticizers caused a slight improvement in the thermal fluidity and stability of the acetylated kenaf composites. In addition, the composites buried in soil showed higher biodegradability than those buried in compost. The presence of moisture in the soil also increased the biodegradability by 80 %. The results of this study demonstrate the high potential of the acetylated kenaf composites as an alternative to synthetic polymer products. Moreover, considering their biodegradable nature, these composites can be applied in treatments and techniques that are focused on the safe disposal of plastic waste for the mitigation of environmental pollution.

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Mechanical and Thermodynamic Properties of Unidirectional Flax Fiber Reinforced CNT Modified Epoxy Composites

Cited by 26 publications

References 37 publications

Directional Control of the Mechanical Properties of a Resin-Cross-Linking System: A Molecular Dynamics Study

Directional Control of the Mechanical Properties of a Resin-Cross-Linking System: A Molecular Dynamics Study

Structure and toughening mechanical properties of multi principal component high entropy alloy

Biodegradable Acetylated Kenaf Fiber Composites

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