Nanodiamond–polymer composites

Mochalin, Vadym; Gogotsi, Yury

doi:10.1016/j.diamond.2015.07.003

Cited by 203 publications

(113 citation statements)

References 70 publications

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“…Nanocomposites may achieve superior properties than conventional composites because the reduced dimension of its particles promote a drastic increase in the superficial area to volume ratio, and consequently in the reinforcement/matrix interface, optimizing its properties, in addition to requiring smaller loading (percentage in weight) to achieve similar reinforcement. However, in order to achieve these benefits, the particles must be well distributed on the matrix [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Influence of Encapsulated Nanodiamond Dispersion on P(3HB) Biocomposites Properties

et al. 2017

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Studies regarding biodegradable nanocomposites to be used as orthopedics devices have been intensified. This work aims to investigate the influence of ND dispersion on thermal and mechanical properties of a biocomposite of poly(3-hydroxybutyrate) (P(3HB)) reinforced with nanodiamonds (ND) intended to be used as orthopedics devices, with advantages as biodegradability. In order to improve its dispersion, P(3HB) has encapsulated ND in three different mass ratios: P(3HB):ND(16:1), (12:1) and (8:1). However, for all formulations, NDs are presented as agglomerates, in different intensities. In order to relate the distribution of ND within the polymer matrix and biocomposite properties, TGA, DSC, and DMA analysis were done. The formulation with higher content of ND, P(3HB):ND(8:1), presents larger aggregates; thus, decreasing its properties. With smaller and more distributed agglomerates, the 12:1 ratio composite displayed superior storage modulus and glass transition temperature, probably due to better polymer chain restriction.

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Section: Introductionmentioning

confidence: 99%

Influence of Encapsulated Nanodiamond Dispersion on P(3HB) Biocomposites Properties

et al. 2017

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“…Compared to carbon‐based nanoparticles such as carbon nanotube (CNTs) and graphene oxide, ND has many advantages such as higher number of particles in the matrix at any given concentration and outstanding ability for surface modification with various chemical groups. Additionally, the spherical shape of ND offers entanglement‐free nanoparticles, and its unique outer shell structure makes ND a promising candidate for the reinforcement of polymeric materials …”

Section: Introductionmentioning

confidence: 99%

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Karami

Shojaei

2016

Polymer International

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Surface chemistry of as‐received nanodiamond (ND) was first tailored by dry thermal oxidation to obtain carboxylated ND (ND‐COOH) and by wet chemistry to obtain ethylenediamine‐functionalized ND (ND‐EDA). Then, the surface‐functionalized ND particles were dispersed in polyamide 6 (PA6) using the melt‐mixing method. Transmission optical and scanning electron microscopies indicated a fine dispersion at low nanodiamond concentrations, e.g. 0.25 wt%, particularly with ND‐EDA. Differential scanning calorimetry revealed that ND‐EDA favoured the α‐phase crystal and enhanced the degree of crystallinity of PA6. Experimental data indicated that ND‐EDA had considerably improved tensile properties at low concentration of 0.25 wt% compared to ND‐COOH, which was correlated to the fine dispersion and stronger and thicker interphase in the case of ND‐EDA. It was also found that the toughness of PA6 was improved on incorporation of ND‐EDA due to development of microcracking and crazing. © 2016 Society of Chemical Industry

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“…To ensure good dispersion of the reinforcement particles in any media they need proper surface modification or functionalization. The treatment includes heat treatment in gaseous atmospheres, chemical methods such as acid mixture purification, and polymer grafting . Some of these methods are so difficult and time consuming that they are uneconomical, especially in industrial applications.…”

mentioning

confidence: 99%

Effect of Nanodiamond Addition on Flexural Strength, Impact Strength, and Surface Roughness of PMMA Denture Base

Al‐Harbi

Abdel-Halim

Gad

et al. 2018

Journal of Prosthodontics

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Purpose To assess the effect of addition of different concentrations of nanodiamonds (NDs) on flexural strength, impact strength, and surface roughness of heat‐polymerized acrylic resin. Materials and Methods 120 specimens were fabricated from heat‐polymerized acrylic resin. They were divided into a control group of pure polymethylmethacrylate (PMMA; Major.Base.20) and three tested groups (PMMA‐ND) with 0.5%wt, 1%wt, and 1.5%wt of added ND to PMMA. Flexural strength was determined using the three‐point bending test. Impact strength was recorded by using a Charpy type impact test. Surface roughness test was performed using a Contour GT machine. One‐way ANOVA and Tukey's post‐hoc analysis (p ≤ 0.05) were used for statistical analysis. Results Acrylic resin reinforced with 0.5% ND displayed significantly higher flexural strength than the unreinforced heat‐polymerized specimens, acrylic resin reinforced with 1% ND and the 1.5% ND (p < 0.0001). The impact strength of unreinforced heat‐polymerized specimens was significantly higher than all nano‐composite materials (p < 0.0001) with no significant difference between 1% ND and the 1.5% ND (p > 0.05). The addition of 0.5% ND and 1% ND significantly decreased the surface roughness in comparison to both control and the 1.5% ND groups (p < 0.0001) while no significant differences between 0.5% ND and 1% ND (p > 0.05) were reported. Nano‐composite material (0.5% ND) showed significantly lower surface roughness when compared to other specimens. Conclusions The addition of NDs to acrylic denture base improved the flexural strength and surface roughness at low concentrations (0.5%), while the impact strength was decreased with ND addition.

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Nanodiamond–polymer composites

Cited by 203 publications

References 70 publications

Influence of Encapsulated Nanodiamond Dispersion on P(3HB) Biocomposites Properties

Influence of Encapsulated Nanodiamond Dispersion on P(3HB) Biocomposites Properties

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Effect of Nanodiamond Addition on Flexural Strength, Impact Strength, and Surface Roughness of PMMA Denture Base

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