Academic literature on the topic 'NANOPARTICULATE FILLER'

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Journal articles on the topic "NANOPARTICULATE FILLER"

1

Randhawa, Kawaljit Singh, and Ashwin D. Patel. "A review on tribo-mechanical properties of micro- and nanoparticulate-filled nylon composites." Journal of Polymer Engineering 41, no. 5 (2021): 339–55. http://dx.doi.org/10.1515/polyeng-2020-0302.

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Abstract Nylon composites are of evolving interest due to their good strength, toughness, and low coefficient of friction. Various fillers like micro- and nanoparticulates of metals and metal compounds were used to enhance the mechanical and tribological properties of nylons for many years by researchers. In this paper, an overall understanding of composites, filler materials, especially particulate filler materials, application areas of polymer composites, wear of polymers, and the effect of various fillers on tribo-mechanical properties of nylons have been discussed. The detailed review is limited to micro- and nanoparticulate fillers and their influence on the mechanical and tribological properties of various nylon matrices.
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Sobczyk-Guzenda, Anna, Paulina Boniecka, Anna Laska-Lesniewicz, Marcin Makowka, and Hieronim Szymanowski. "Micro- and Nanoparticulate Hydroxyapatite Powders as Fillers in Polyacrylate Bone Cement—A Comparative Study." Materials 13, no. 12 (2020): 2736. http://dx.doi.org/10.3390/ma13122736.

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Acrylate polymer-based bone cements constitute the most popular bonding agents used in regenerative surgery. Due to their inferior biocompatibility, however, these materials are often enriched with ceramic additives including hydroxyapatite (HAp). The aim of this paper was to perform a comparative study of the acrylate cements filled with different content (3–21%) of nano- and microscale hydroxyapatite. The work concerns a comparison of times and temperatures of the cross-linking reaction, as well as morphology, glass transition temperature, and principal mechanical properties of the resulting composites. Before being used as a filler, both HAp forms were subjected to an in-depth characterization of their morphology, specific surface area, pore size distribution, and wettability as well as chemical composition and structure. For that purpose, such analytical techniques as scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, tensiometry, Brunauer–Emmett–Teller surface area analysis, differential scanning calorimetry, Shore D hardness test, and Charpy impact test were used. The results indicated a drop of cross-linking temperature and an extension of setting time with the addition of µHAp. The µHAp-filled acrylate composites were characterized by a globular surface morphology, higher glass transition temperature, and lower hardness and impact strength compared to nHAp-filled materials. This relationship was evident at higher nHAp concentrations.
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Siva Kaylasa Sundari, S., S. Shamim Rishwana, R. Ramani, and C. T. Vijayakumar. "Improvement in electrical and mechanical properties of di/trifunctional epoxies-based hybrid composites having metal organic frameworks (MOFs) as nanoparticulate filler." MRS Communications 12, no. 2 (2022): 250–56. http://dx.doi.org/10.1557/s43579-022-00170-z.

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Einollahi, Yashar, Amir Hooman Hemmasi, Habibollah Khademi Eslam, Esmaeil Ghasemi, and Mohammad Talaeipour. "The effect of different mineral fillers on starch/rice husk composite properties." BioResources 16, no. 1 (2021): 1772–86. http://dx.doi.org/10.15376/biores.16.1.1772-1786.

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The objective of this research was to study the feasibility of producing biodegradable thermoplastic starch rice-husk composites. The effect of different types of mineral fillers on the various properties of thermoplastic starch composites filled with rice-husk flour, an agricultural waste residue, was studied. The mineral fillers aluminum trihydrate (ATH), magnesium dihydroxide (MDH), nanoparticulate MDH, and nanoclay were studied. It was found that the addition of the mineral fillers and especially nanofillers improved the dimensional stability and the mechanical properties of the composites, while decreasing their biodegradability. The thermogravimetric analysis (TGA) showed that substituting mineral fillers for some part of the lignocellulosic component increased the extents of weight-loss in the first and second steps, but decreased the weight-loss in the last step. This substitution also led to a slight decrease in the thermal decomposition temperatures at the curve peaks.
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5

Campos, Luiza MP, Letícia C. Boaro, Tamiris MR Santos, et al. "Evaluation of flexural modulus, flexural strength and degree of conversion in BISGMA/TEGDMA resin filled with montmorillonite nanoparticles." Journal of Composite Materials 51, no. 7 (2016): 927–37. http://dx.doi.org/10.1177/0021998316656925.

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This study had as its main objective to evaluate the flexural properties (strength and modulus) and degree of conversion of a dimethacrylate resin containing different amounts of nanoparticulated clay Montomorillonite (MMT) as filler. A series of composites containing similar amounts (in volume) of barium glass particles was also tested as control data. Eight formulations with polymeric matrix-based BisGMA/TEGDMA (Bisphenol A Bis(2-hydroxy-3 methacryloxypropyl)Ether/Triethyleneglycol Dimethacrylate), four added with MMT and four added with barium glass in the volume concentration of 20, 30, 40 and 50 vol% were studied. The degree of conversion was determined using near-IR spectroscopy. Elastic modulus and flexural strength were determined by the three-point bending test. The dispersion of MMT nanoparticles was determined by means of X-ray diffraction and transmission electron microscopy analysis. The fillers montomorillonite and barium glass interacted with polymer matrix-based BisGMA/TEGDMA in a distinct manner. Although the addition of montomorillonite nanoparticles resulted in similar degree of conversion and higher elastic modulus values at all concentrations tested, only at the 20 vol% the flexural strength was statistically higher, compared to the control groups filled with barium glass. This could be related to the need of concentration optimization of montomorillonite for each type of polymer matrix in order to adjust or improve mechanical properties. The addition of low concentrations (<l 20% vol) of montomorillonite nanoparticles in dental composites resins – such as additive or hybrid filler – should be studied, aiming to the reduction of polymerization shrinkage, better mechanical properties and improvement of a new technology for future applications.
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6

Mitra, Tamoghna, Rupesh S. Bhavsar, Dave J. Adams, Peter M. Budd, and Andrew I. Cooper. "PIM-1 mixed matrix membranes for gas separations using cost-effective hypercrosslinked nanoparticle fillers." Chemical Communications 52, no. 32 (2016): 5581–84. http://dx.doi.org/10.1039/c6cc00261g.

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Addition of a cheap, nanoparticulate, hypercrosslinked polymer “sponge” to the high-free-volume glassy polymer PIM-1 gives mixed matrix membranes with enhanced permeability and improved aging behaviour.
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7

Melo-Silva, T. C. F., C. L. Melo-Silva, C. F. Carvalho, A. B. Teixeira, J. F. C. Lins, and J. P. Gouvêa. "Evaluation of Mechanical Properties of Composite Materials Used in Dentistry Varying the Inorganic Composition." Materials Science Forum 820 (June 2015): 320–24. http://dx.doi.org/10.4028/www.scientific.net/msf.820.320.

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The aim of this study was to determine the hardness and the elasticity modulus of the two composite resins base of BISGMA with different inorganic particles: a nanoparticulated with a ceramic withload, (Filtek Z350XT-3M) with and without thermal activation and a microhybrid with no ceramic load (Opallis-FGM). The samples were prepared and subjected to the tests of Vickers hardness (Shimadzu HMV) and acoustic excitation pulse (Sonelastic ®). The samples were divided into three groups: G1-Filtek Z350 XT; G2-Filtek Z350XT MO (subject to further polymerization microwave) and G3-Opallis. The results showed that the hardness of G2 was significantly higher than the groups G1 and G3. The elastic modulus was higher than the G2 to G1 and G3. One can conclude that the resins filled with inorganic ceramic filler showed higher hardness and elastic modulus. The thermal activation increased the hardness and the elasticity modulus of the resin with ceramic load.
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8

TabkhPaz, Majid, Dong-Yeob Park, Patrick C. Lee, Ron Hugo, and Simon S. Park. "Development of nanocomposite coatings with improved mechanical, thermal, and corrosion protection properties." Journal of Composite Materials 52, no. 8 (2017): 1045–60. http://dx.doi.org/10.1177/0021998317720001.

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In this study, new composite coatings are fabricated and investigated for their applications as the metal coating. The studied coatings consist of two-layered composites with various nanoparticulates as fillers in a polymeric matrix (styrene acrylic). The first layer bonded to the steel plate uses a combination of zinc particles, multi-walled carbon nanotubes, and graphene nanoplatelets. For the second layer, hexagonal boron nitride with high electrical insulation properties is added to the matrix. The morphology of the nanoparticulates is conducted using a scanning electron microscope. The coefficient of thermal expansion, cathodic disbondment resistance, gas penetration, and scratch resistance of the coatings are evaluated. The corroded area on the cathodic disbondment test specimens reduced down up to 90% for the composite with zinc (20 wt%), multi-walled carbon nanotubes (2 wt%), and graphene nanoplatelets (2 wt%), compared to a specimen coated with a pure polymer. It is seen that the presence of nanoparticulates decreased gas permeation and thermal expansion of the matrix by 75% and 65%, respectively. The addition of nanoparticulates also enhanced scratch resistance of the coating composites.
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9

Gomoll, Andreas H., Wolfgang Fitz, Richard D. Scott, Thomas S. Thornhill, and Anuj Bellare. "Nanoparticulate fillers improve the mechanical strength of bone cement." Acta Orthopaedica 79, no. 3 (2008): 421–27. http://dx.doi.org/10.1080/17453670710015349.

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10

Ghadami, F., M. R. Dadfar, and M. Kazazi. "Hot-cured epoxy-nanoparticulate-filled nanocomposites: Fracture toughness behavior." Engineering Fracture Mechanics 162 (August 2016): 193–200. http://dx.doi.org/10.1016/j.engfracmech.2016.05.016.

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