Preparation of Polymer-Nanodiamond Composites with Improved Properties

Karbushev, Valeriy V.; Константинов, И. И.; Parsamyan, I. L.; Куличихин, В. Г.; Popov, V.A.; George, Thomas F.

doi:10.4028/3-908454-01-8.275

Cited by 5 publications

(7 citation statements)

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“…Due to their surface functional groups, the individual ND particles structurally selforganize into aggregates of 20−30 nm size, which in turn form larger agglomerates ranging from hundreds of nanometers to micrometer sizes that are kept together through weak hydrogen bonds which are very difficult to break down during nanocomposites formation. A compromise of the mechanical properties of ND-polymer composites has been attributed to the poor dispersion due to agglomeration/reagglomeration of the nanodiamonds within the polymer matrix 16,36) . As shown by TEM a good dispersion of ND particles has been achieved in the PMMA-ND 0.1% composites, although the simultaneous existence of small areas of aggregated particles was evidenced.…”

Section: Discussionmentioning

confidence: 99%

“…Nanodiamonds (ND), also known as ultrafinedispersed diamonds (UDDs) or detonation nanodiamonds, are becoming one of the most widely studied nanomaterials due to their unique properties such as hardness, thermal conductivity, dopability or optical transparency over a wide spectral range [12][13][14] . ND powder can be produced by a detonation synthesis in large volumes and is a carbon nanomaterial for a broad range of potential applications, including composites [13][14][15][16] . As produced powder consists of disordered graphite (67% wt) and diamond (33% wt) and presents a mean diameter of 1-5 nm, a specific surface of 300−590 m 2 /g and a specific gravity of 1.86 g/cm 3,[16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

“…ND powder can be produced by a detonation synthesis in large volumes and is a carbon nanomaterial for a broad range of potential applications, including composites [13][14][15][16] . As produced powder consists of disordered graphite (67% wt) and diamond (33% wt) and presents a mean diameter of 1-5 nm, a specific surface of 300−590 m 2 /g and a specific gravity of 1.86 g/cm 3,[16][17][18] . Although the physical and chemical properties of ND are highly affected by a series of parameters that differ among the manufacturers such as the explosive mixture, the coolant media and most importantly, the consequent purification of the detonation soot, all ND particles present numerous oxygen-containing hydrophilic chemical groups that make them attractive for various biomedical applications 19,20) .…”

Section: Introductionmentioning

confidence: 99%

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Reinforcement of a PMMA resin for fixed interim prostheses with nanodiamonds

et al. 2011

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The aim of this study was to investigate the possible reinforcement of Nanodiamonds (ND) in a PMMA resin for fixed interim restorations. The fracture toughness (KIc), impact strength and the dynamic thermomechanical properties (Tg, E´, E´´, tan) of a series of PMMA-ND nanocomposites with different amounts of ND were evaluated. The fracture toughness increased as the ND percentage increased up to 0.38% wt but a greater amount of ND induced a decrease in KIc. Impact strength and Young's modulus were also increased by increasing nanoparticles content, indicating the reinforcing effect of ND. Dynamic mechanical properties were also affected. By increasing the ND content an increase of storage modulus was recorded, while glass transition was shifted at higher temperatures. Under the limitations of this study, it can be suggested that reinforcing PMMA with ND nanoparticles -especially at low concentrations-may increase the overall performance of fixed interim prostheses.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reinforcement of a PMMA resin for fixed interim prostheses with nanodiamonds

et al. 2011

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“…Nanoparticles were also used as fillers in dental polymeric materials to upgrade some of the mechanical properties of the nanocomposites . Similar to nanocomposites, nanodiamond powders’ (NDs) unique properties of hardness and thermal conductivity allow them a wide range of applications . ND particles are considered an effective reinforcing material to PMMA because of their strength, fine dispersion within the acrylic matrix, surface properties, and biocompatibility .…”

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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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“…The quality of the filler dispersion in the matrix is important, because it determines the surface area of the nanoparticles available for interaction with the matrix. When adequately dispersed, NDs increase strength, toughness and thermal stability of the nanocomposites (Karbushev et al, 2008). Purified NDs are composed of particles with 5 nm average diameter.…”

Section: Carbon-based Nanocompositesmentioning

confidence: 99%

Synthetic biopolymer/layered silicate nanocomposites for tissue engineering scaffolds

Okamoto

2013

Ceramic Nanocomposites

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Preparation of Polymer-Nanodiamond Composites with Improved Properties

Cited by 5 publications

References 0 publications

Reinforcement of a PMMA resin for fixed interim prostheses with nanodiamonds

Reinforcement of a PMMA resin for fixed interim prostheses with nanodiamonds

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

Synthetic biopolymer/layered silicate nanocomposites for tissue engineering scaffolds

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