A Study on the Effect of Nano Alumina Particles on Fracture Behavior of PMMA

Sezavar, Arezou; Zebarjad, Seyed Mojtaba; Sajjadi, Seyed Abdolkarim

doi:10.3390/technologies3020094

Cited by 21 publications

(15 citation statements)

References 16 publications

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“…The surface roughness was highest at the microcrack‐formation zone. The fracture surface morphology obtained in this study was very similar to those in other reports …”

Section: Resultssupporting

confidence: 90%

“…There is a report that the FS of polymers can be improved through the use of metal NPs as reinforcing fillers . The mechanical properties of such nanocomposites depend on the type, size, shape, and concentration of filler used.…”

Section: Resultsmentioning

confidence: 99%

“…The fracture surface morphology of the composite could be characterized by the presence of three dissimilar regions, which are depicted in Figure (A). The first zone was a flat mirror zone around the point of crack origin, the second transition zone showed a progressive increase in the surface roughness, and the final propagation zone had crack marks . The surface roughness was highest at the microcrack‐formation zone.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Development of oral‐fluid‐impervious and fracture‐resistant silver–poly(methyl methacrylate) nanoformulations for intra‐oral/extra‐oral rehabilitation

Gopalakrishnan

Raj

Mathew

et al. 2019

J of Applied Polymer Sci

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Poly(methyl methacrylate) (PMMA) based dental prosthetic materials have an inferior transverse resistance value and a high water-retention capacity. These drawbacks cause frequent prosthesis fractures both inside and outside the mouth, which require the remaking or repair of the prosthesis. The mechanical and physical durability of the polymer matrix can be improved by the incorporation of a multifunctional filler. In this study, we focused on the reinforcing effect of silver nanoparticles (AgNPs) on the flexural properties of PMMA. Apart from that, the transport behavior of water and saliva through this composite matrix was also studied extensively. Morphological analyses with scanning electron microscopy (SEM) and atomic force microscopy imaging techniques confirmed the uniform distribution of nanoparticles in the matrix with an increased surface roughness proportionate to the amount of AgNPs. The flexural strength and modulus were enhanced by the addition of up to 5 wt % AgNPs (p < 0.05); we also observed a significant increase in the fracture resistance. The SEM micrographs of the fractured ends of AgNP-reinforced groups had smaller cracks compared to the large multidirectional cracks in the unreinforced group. The diffusion of oral fluid through the composite was investigated in detail as a function of the AgNP content, the nature of the solvent (water or saliva), and the temperature (5, 28, 37, or 60 C). The water and saliva uptake, diffusion, sorption, and permeation constants were investigated and were found to decrease with increasing AgNP loading. The transport properties could have been related to the morphology of the nanocomposites and followed the Korsmeyer-Peppas model. At high concentrations, the AgNPs formed a local filler-filler network in the polymer matrix. This network hindered the transport of water and saliva through the polymer. The outcome deduced from this study confirmed that the reinforced nanocomposites improved the durability of the denture base and could be an effective replacement for the conventional denture base.

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“…The surface roughness was highest at the microcrack‐formation zone. The fracture surface morphology obtained in this study was very similar to those in other reports …”

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Development of oral‐fluid‐impervious and fracture‐resistant silver–poly(methyl methacrylate) nanoformulations for intra‐oral/extra‐oral rehabilitation

Gopalakrishnan

Raj

Mathew

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…When less than 5%, there is no apparent effect of wear resistance compared to the base material. When the ratio is higher than 15%, the difficulty of homogenous distribution and the occurrence of gaps in the samples is a failure that leads to the collapse of the filling in the future and its erosion in a short time this is agreement with [18]. The photographs shown in figurer (5) the results of the bacterial examination of the prepared fillings.…”

Section: Preparation Of Teeth Fillingsupporting

confidence: 70%

Development artificial dental filling (PMMA) for antibacterial and wear resistance enhanced by bioceramic system CaTiO3

2018

QJPS

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Abstract:In this paper, bioactive ceramics of calcium oxides prepared from egg shells and nano-titanium dioxide were used in a 1: 1 ratio and were mixed with a polymeric bonding material suitable for medical applications. Dry mixing and homogenous mixing were used. Ultrasonic technology was then used to prepare the nanoparticles that were then formed in standard dimensions for the purpose of conducting the required tests. The screw technique was used on the disk to calculate the rate of wear and tear, weight and volume, as well as the wear and tear coefficient. The concrete hardness scale was used to calculate the scratch resistance of the surface. The results of the various types of wear and tear index were significantly improved by the successive additions of ceramic material (calcium tetanite) as well as by increasing the scratch resistance of the prepared models obtained from the hardness scale. Synthetic tests (electronic scanning microscopy and x-ray diffraction) were used to interpret the results as well as to examine the material prepared against the bacteria.

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“…Bhimaraj et al [18] reduced wear rate and friction coefficient of PET by adding alumina nanoparticles. Sezavar et al [19] improved tensile properties and changed fracture mechanism of poly(methyl methacrylate) (PMMA) by introducing nano-sized alumina. Mallakpour et al [20] increased the thermal stability temperature of poly(vinyl pyrrolidone) by adding modified alumina nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

The investigation of alumina nanoparticles’ effects on the mechanical and thermal properties of HDPE/rPET/MAPE blends

Shahrajabian

Sadeghian

2019

Int Nano Lett

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In this research, the mechanical and thermal properties of nanocomposites containing alumina nanoparticles in the highdensity polyethylene/recycled polyethylene terephthalate/maleic anhydride polyethylene (HDPE/rPET/MAPE) matrix were investigated. For this purpose, tensile, flexural, impact energy, and differential scanning calorimetry (DSC) test were done. Here, 0, 1, 3, and 5 wt% alumina nanoparticles were added to the HDPE/rPET/MAPE using a co-rotating screw extruder. Morphological studies using scanning electron microscopy revealed that alumina nanoparticles within HDPE/rPET/MAPE matrix were well dispersed in low content of nanoparticles (up to 3 wt%). The results of mechanical tests showed that the presence of alumina nanoparticles improved tensile strength, elastic modulus, flexural strength, and impact energy. The maximum improvement was observed for the sample containing 3 wt% of alumina. DSC test revealed alumina nanoparticles in the content of 3 wt% increased the crystallinity degree of HDPE in the blend of HDPE/rPET/MAPE and caused to approach the melting points of HDPE and rPET.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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A Study on the Effect of Nano Alumina Particles on Fracture Behavior of PMMA

Cited by 21 publications

References 16 publications

Development of oral‐fluid‐impervious and fracture‐resistant silver–poly(methyl methacrylate) nanoformulations for intra‐oral/extra‐oral rehabilitation

Development of oral‐fluid‐impervious and fracture‐resistant silver–poly(methyl methacrylate) nanoformulations for intra‐oral/extra‐oral rehabilitation

Development artificial dental filling (PMMA) for antibacterial and wear resistance enhanced by bioceramic system CaTiO3

The investigation of alumina nanoparticles’ effects on the mechanical and thermal properties of HDPE/rPET/MAPE blends

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