Computational and experimental study of mechanical properties of Nylon 6 nanocomposites reinforced with nanomilled cellulose

Krishna, Sanjay; Patel, Chintan

doi:10.1016/j.mechmat.2020.103318

Cited by 28 publications

(17 citation statements)

References 25 publications

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“…The CNFs imparted intrinsic mechanical properties to the nanocomposites. Both the tensile strength and Young’s modulus are appreciably higher, indicating good wetting and effective stress transfer at the PA6–CNF interface [ 29 ]. The uniform dispersion and distribution of CNFs provide a high surface area that increases the number of secondary interactions with the PA6 matrix [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Strong Polyamide-6 Nanocomposites with Cellulose Nanofibers Mediated by Green Solvent Mixtures

et al. 2021

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Cellulose nanofiber (CNF) as a bio-based reinforcement has attracted tremendous interests in engineering polymer composites. This study developed a sustainable approach to reinforce polyamide-6 or nylon-6 (PA6) with CNFs through solvent casting in formic acid/water mixtures. The methodology provides an energy-efficient pathway towards well-dispersed high-CNF content PA6 biocomposites. Nanocomposite formulations up to 50 wt.% of CNFs were prepared, and excellent improvements in the tensile properties were observed, with an increase in the elastic modulus from 1.5 to 4.2 GPa, and in the tensile strength from 46.3 to 124 MPa. The experimental tensile values were compared with the analytical values obtained by micromechanical models. Fractured surfaces were observed using scanning electron microscopy to examine the interface morphology. FTIR revealed strong hydrogen bonding at the interface, and the thermal parameters were determined using TGA and DSC, where the nanocomposites’ crystallinity tended to reduce with the increase in the CNF content. In addition, nanocomposites showed good thermomechanical stability for all formulations. Overall, this work provides a facile fabrication pathway for high-CNF content nanocomposites of PA6 for high-performance and advanced material applications.

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Section: Resultsmentioning

confidence: 99%

Strong Polyamide-6 Nanocomposites with Cellulose Nanofibers Mediated by Green Solvent Mixtures

et al. 2021

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“…Molecular modeling has been utilized to investigate the properties of amorphous cellulose as opposed to CNC [ 19 , 20 , 21 ]. Some studies have applied molecular modeling to investigate the interaction of CNC with a liquid solvent (most solvent studies are focused on water) [ 22 , 23 , 24 ] and with polymeric materials [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulation of Polyacrylamide Adsorption on Cellulose Nanocrystals

et al. 2020

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Classical molecular dynamics simulations of polyacrylamide (PAM) adsorption on cellulose nanocrystals (CNC) in a vacuum and a water environment are carried out to interpret the mechanism of the polymer interactions with CNC. The structural behavior of PAM is studied in terms of the radius of gyration, atom–atom radial distribution functions, and number of hydrogen bonds. The structural and dynamical characteristics of the polymer adsorption are investigated. It is established that in water the polymer macromolecules are mainly adsorbed in the form of a coil onto the CNC facets. It is found out that water and PAM sorption on CNC is a competitive process, and water weakens the interaction between the polymer and CNC.

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“…This could be due to excessive nanofiller–nanofiller interaction leading to poor reinforcement and embrittlement of the overall sample [ 31 ]. Another reason could be that increased filler content makes the polymer difficult to penetrate the space between the nanofillers resulting in poor wetting and hindering stress transfer through the interface [ 32 ]. Overall, for such high fiber weight fraction nanocomposites, the CNF exists as a 3D percolated network due to the hydroxyl groups on CNF resulting in hydrogen bonding between them [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing

Sridhara

Vilaseca

2021

Polymers

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On an industrial scale, it is a challenge to achieve cellulose based nanocomposites due to dispersion issues and high process temperatures sensitivity. The current study describes methods to develop mechanically strong and thermally stable polyamide 6 (PA 6) and cellulose nanofibers (CNF) composites capable of tolerating high processing temperatures. With PA 6 being a very technical polymer matrix to be reinforced with CNF, good dispersion can be achieved with a high speed kinetic mixer and also shield the CNF from excess thermal degradation by implementing extremely short processing time. This paper presents an industrially feasible method to produce PA 6/CNF nanocomposites with high CNF composition processed by a high speed kinetic mixer (GELIMAT®) followed by compression molding to obtain a homogenous and thermally stable nanocomposites aimed at high performance applications. PA 6 was reinforced with three different wt.% formulations (5, 15 and 25 wt.%) of cellulose nanofibers. The resulting nanocomposites exhibited significant increase in Young’s modulus and ultimate strength with CNF content, owing to the effective melt processing and the surface charge density of the CNF, which necessitated the dispersion. The thermal stability and polymer crystallinity with respect to CNF composition for the PA 6/CNF nanocomposites were examined by TGA and DSC analysis. Rheology studies indicated that viscosity of the composites increased with increase in CNF composition. Overall, this work demonstrates industrially viable manufacturing processes to fabricate high performance PA 6/CNF nanocomposites.

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Computational and experimental study of mechanical properties of Nylon 6 nanocomposites reinforced with nanomilled cellulose

Cited by 28 publications

References 25 publications

Strong Polyamide-6 Nanocomposites with Cellulose Nanofibers Mediated by Green Solvent Mixtures

Strong Polyamide-6 Nanocomposites with Cellulose Nanofibers Mediated by Green Solvent Mixtures

Molecular Dynamics Simulation of Polyacrylamide Adsorption on Cellulose Nanocrystals

High Performance PA 6/Cellulose Nanocomposites in the Interest of Industrial Scale Melt Processing

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