Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

Kandemir, Ayse Cagil; Donmez, Fatma; Davut, Kemal; Can, Hatıce Kaplan

doi:10.1002/pc.26717

Cited by 6 publications

(8 citation statements)

References 41 publications

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“…It is also known that PVP is highly hydrophilic, and moisture absorption leads to chain breakage; thereby, bulk specimens could not be produced in our previous study. 25 Similarly, for high-thickness coatings, the moisture effect could be more effective in the upper parts of the film.…”

Section: Elastic Modulusmentioning

confidence: 99%

“…In order to confirm the reliability of PVP elastic modulus, the indentation test was repeated for smaller indentation depths of 200-400 nm for pristine PVP, revealing again the average elastic modulus of 3.9 GPa, details of which are given in our previous study. 50 Therefore, the measured elastic modulus values are trustworthy, and the substrate influence could be excluded. The indentation depth of nanocomposites is approximately 50% lower than the pristine polymer, making the nanocomposite films even less prone to the substrate effect.…”

Section: Elastic Modulusmentioning

confidence: 99%

“…Even though PVP has remarkable properties of biocompatibility and nontoxicity, its mechanical properties are inferior. In the study of Kandemir et al, 25 it is confirmed that neither PVP nor PVP/clay nanocomposites could be shaped via injection molding as the samples fracture upon release from the mold. This is due to the highly brittle nature of PVP.…”

Section: Introductionmentioning

confidence: 99%

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Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

Kandemir,

Donmez,

Can

2023

Polymer Composites

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This study focuses on achieving mechanical enhancements in biocompatible organic coatings. A solvent‐based method is employed to produce biocompatible nanocomposites using polyvinylpyrrolidone (PVP) and bentonite nanoclays (BNT) as constituents to achieve this objective. Subsequently, the nanocomposites are spin‐coated onto a glass substrate, resulting in smooth and defect‐free films with a thickness of 5 μm. Through instrumented‐indentation testing, it is observed that BNT reinforcement leads to significant improvements in mechanical properties. Specifically, the addition of 0.5, 1, and 5 wt% of BNT in PVP results in enhancements of 105%, 77%, and 430% in elastic modulus, respectively, while hardness is improved by 166%, 211%, and 448%, respectively. The considerable improvements in the composite modulus cannot be adequately explained by assuming perfect adhesion between the constituents of the composite (as suggested by the Halpin–Tsai model) or by considering the contributions from the interface/network of silicate layers (as proposed by the Modified Halpin–Tsai model). Instead, the significant enhancements in hardness and modulus values are primarily attributed to a notable increase in the BNT volume fraction, ranging from 4 to 9 times, occurring under the Berkovich tip due to the aggregated silicate layers. The findings highlight the role of aggregated silicate layers in enhancing both hardness and modulus and contribute to the development of advanced biocompatible coatings with improved mechanical properties.Highlights Enhanced mechanical properties in biocompatible coatings. Biocompatible nanocomposites of polyvinylpyrrolidone (PVP) and bentonite nanoclays (BNT). Spin‐coated nanocomposite films on glass: smooth, defect‐free, 5 μm thick. BNT reinforcement boosts elastic modulus and hardness of PVP. Aggregated silicate layers under compression drive substantial mechanical improvements.

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Section: Elastic Modulusmentioning

confidence: 99%

Section: Elastic Modulusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

Kandemir,

Donmez,

Can

2023

Polymer Composites

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“…One of the commonly used methods to overcome this drawback is by modifying the properties of epoxy resin by loading them with rigid fillers. [ 1–8 ]…”

Section: Introductionmentioning

confidence: 99%

“…One of the commonly used methods to overcome this drawback is by modifying the properties of epoxy resin by loading them with rigid fillers. [1][2][3][4][5][6][7][8] Previous works [9][10][11][12][13][14][15][16][17] have already shown that the toughening of the epoxy resins with both organic and inorganic nanofillers can substantially influence their characteristics and the selection of the toughener depends on the epoxy properties to be varied.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and fracture properties of carbon nano fibers/short carbon fiber epoxy composites

et al. 2023

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This work investigated the influence of carbon nanofibers (CNFs) and aggregate of CNFs with micro‐sized short carbon fibers (SCFs) on the mechanical, thermal, and fracture properties of epoxy (80%) ‐ Polylactic acid (PLA) (20%) composite. Epoxy‐PLA composite loaded with CNFs (0.2, 0.3, and 0.4 wt.%) and a combination of CNFs and SCFs (0.2 and 0.4 wt.% with equal content of each filler) were manufactured by sonication and manual casting. The synergistic effects of CNFs and SCFs in the epoxy matrix were investigated through mechanical and fracture characterization of nanocomposites. In comparison to CNF‐reinforced nanocomposites, the composites reinforced with integrated multiscale fillers have higher tensile, flexural, impact strength, and fracture toughness. Tensile, flexural and impact strength increased by 17.18–25.72%, 39.24–44.07%, and 39.87–97.05% respectively with the incorporation of both CNFs and SCFs into epoxy‐PLA matrices. An improvement in fracture toughness in the range of 37.93–38.77% was observed in hybrid nanocomposites in comparison to pristine epoxy‐PLA composite. The synergetic mechanism of nano and micro fillers was studied by using the fracture surfaces from tensile tests using scanning electron microscopy. The numerical analysis was also carried out to simulate the effects of filler concentration on the tensile and bending strength of nanocomposites through representative volume element using an ANSYS workbench.

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The role of extracted Patchouli residue microparticle on the mechanical and microbial properties macroalgae biopolymer

Muhammad,

Abdullah,

Ahmad

et al. 2024

Polymer Composites

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Macroalgae is extensively being used to develop eco‐friendly biopolymer or biodegradable films, but have inferior mechanical strength. This study aims to enhance the mechanical properties of seaweed films by incorporating Patchouli microparticles (PMP) derived from dried Patchouli plants (DP‐PMP) and extracted residue (ER‐PMP) from Patchouli extraction process widely use in the perfume and cosmetic industry. The PMPs, were incorporated into films forming solution at varying concentrations (1%, 3%, 5%, and 7% wt/wt) respectively. Despite similar thermal properties, the inclusion of ER‐PMP resulted in an increasing ash residue content with an increase in concentration. The optimal tensile strength was achieved with a 3% PMP loading, while higher concentrations resulted in a decline in strength. Notably, the sample containing 1% PMP demonstrated superior elasticity. Moreover, with increasing concentrations of PMPs, all samples displayed elevated surface roughness and enhanced hydrophobicity. All samples display significant antimicrobial activity against E‐coli and Salmonella sp.; however, the sample incorporating ER‐PMP showed less effect. In summary, the study suggests that DP‐PMP and ER‐PMP can serve as effective fillers to enhance the mechanical properties of seaweed biofilms, with an optimal loading of 3%. Their antimicrobial activity renders them suitable biopolymers for active packaging in food applications and other purposes.Highlights Patchouli microparticle (PMP) enhance the properties of seaweed film. Film's surface morphology and hydrophobicity changed with increase in PMP. Introduction of either PMPs increase antimicrobial properties of the film. PMP from extracted residue (ER) provide lower antimicrobial activity. 3% DP‐PMP gave the optimum properties of the film for overall attributes.

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Design and fabrication of polymer micro/nano composites with two‐level mechanical reinforcing procedure

Cited by 6 publications

References 41 publications

Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

Biocompatible organic coating fabrication via polymer/clay nanocomposites: Evaluation of mechanical improvements

Mechanical and fracture properties of carbon nano fibers/short carbon fiber epoxy composites

The role of extracted Patchouli residue microparticle on the mechanical and microbial properties macroalgae biopolymer

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