scholarly journals Polystyrene-Based Nanocomposites with Different Fillers: Fabrication and Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2457
Author(s):  
Olga A. Moskalyuk ◽  
Andrey V. Belashov ◽  
Yaroslav M. Beltukov ◽  
Elena M. Ivan’kova ◽  
Elena N. Popova ◽  
...  
Keyword(s):  
Elastic Properties ◽  
Elastic Moduli ◽  
Spherical Particles ◽  
Linear Elastic ◽  
Rigid Particles ◽  
Different Types ◽  
Non Linear ◽  
Multi Walled Carbon Nanotubes ◽  
Carbon Fillers ◽  
Walled Carbon Nanotubes

The paper presents a comprehensive analysis of the elastic properties of polystyrene-based nanocomposites filled with different types of inclusions: small spherical particles (SiO2 and Al2O3), alumosilicates (montmorillonite, halloysite natural tubules and mica), and carbon nanofillers (carbon black and multi-walled carbon nanotubes). Block samples of composites with different filler concentrations were fabricated by melt technology, and their linear and non-linear elastic properties were studied. The introduction of more rigid particles led to a more profound increase in the elastic modulus of a composite, with the highest rise of about 80% obtained with carbon fillers. Non-linear elastic moduli of composites were shown to be more sensitive to addition of filler particles to the polymer matrix than linear ones. A non-linearity modulus βs comprising the combination of linear and non-linear elastic moduli of a material demonstrated considerable changes correlating with those of the Young’s modulus. The changes in non-linear elasticity of fabricated composites were compared with parameters of bulk non-linear strain waves propagating in them. Variations of wave velocity and decay decrement correlated with the observed enhancement of materials’ non-linearity.

Dependence of the Elastic Properties of a Single-Walled Carbon Nanotube on its Chirality

2018 ◽  
Vol 284 ◽  
pp. 20-24
Author(s):  
E.S. Sergeeva
Keyword(s):  
Carbon Nanotube ◽  
Elastic Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Extreme Loads ◽  
Structure Sensitive ◽  
Different Types ◽  
Walled Carbon Nanotubes ◽  
Elastic Characteristics

Currently, composite materials composed of a matrix and reinforcing components are widely used as a structural material for various engineering devices designed to operate under extreme loads of different types. By modifying a composite with structure-sensitive inclusions, such as a single-wall carbon nanotube, the mechanical properties, especially elastic characteristics, of the resulting material can be significantly improved. The results of investigation of a single-walled carbon nanotubes chirality influence on its elastic properties are presented. Various configurations of nanotubes, such as zigzag and armchair are considered. The dependences of the nanotube bulk modulus and shear modulus of its diameter are shown.

scholarly journals Nanofiller Reinforced Polyolefin Elastomer: Effect on Morphology and Mechanical Properties of Composites

2013 ◽  
Vol 13 (2) ◽  
pp. 103-108 ◽  
Author(s):  
Sharmila Pradhan ◽  
Ralf Lach ◽  
Wolfgang Grellmann ◽  
Rameshwar Adhikari
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Reinforcing Effect ◽  
Boehmite Nanoparticles ◽  
Polyolefin Elastomer ◽  
Different Types ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Morphology And Mechanical Properties ◽  
Properties Of Composites

The effect of different types of fillers on morphology and mechanical properties of polymer nanocomposites has been investigated using ethylene-1–octene copolymer (EOC), a polyolefin based elastomer, as matrix and various nanofillers {such as multi-walled carbon nanotubes (MWCNT), layered silicate (LS) and boehmite (OS2)}. The morphological structures were studied by scanning electron microscopy (SEM) while the mechanical properties were characterized by tensile testing and microindentation hardness measurements. It has been shown that the nature of the nanofiller may have significant influence on the mechanical properties of the samples. Among the nanocomposites studied so far, the MWCNT filled samples showed the highest reinforcing effect followed by layered silicate. The least reinforcing effect was obtained for the samples filled with boehmite nanoparticles. Nepal Journal of Science and Technology Vol. 13, No. 2 (2012) 103-108 DOI: http://dx.doi.org/10.3126/njst.v13i2.7721

Non-linear elastic properties of plasma-sprayed zirconia coatings and associated relationships with processing conditions

2007 ◽  
Vol 55 (14) ◽  
pp. 4667-4678 ◽  
Author(s):  
Y. Liu ◽  
T. Nakamura ◽  
V. Srinivasan ◽  
A. Vaidya ◽  
A. Gouldstone ◽  
...  
Keyword(s):  
Elastic Properties ◽  
Processing Conditions ◽  
Linear Elastic ◽  
Non Linear ◽  
Plasma Sprayed

scholarly journals Multi-walled carbon nanotube doped PVA membrane for desalination

2018 ◽  
Vol 19 (4) ◽  
pp. 1229-1237 ◽  
Author(s):  
B. Yilman ◽  
F. U. Nigiz ◽  
A. Aytaç ◽  
N. D. Hilmioglu
Keyword(s):  
Carbon Nanotubes ◽  
Sem Analysis ◽  
Multi Walled Carbon Nanotube ◽  
Mwcnt Concentration ◽  
Degree Of Swelling ◽  
Excess Amount ◽  
Different Types ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Abstract In this study, multi-walled carbon nanotubes (MWCNT) loaded polyvinyl alcohol (PVA) membranes were synthesized and applied for desalination by means of pervaporation technique. Membranes were characterized using scanning electron microscope (SEM). Sorption studies were carried out to determine the degree of swelling of the MWCNT/PVA membranes into different types of salt solution. Pervaporation experiments were carried using the pristine and MWCNT loaded membranes. The effect of MWCNT concentration and salt concentration on the swelling, flux and salt rejection were investigated at the constant temperature of 40 °C. As a result, greater than 92% of rejections were obtained using all membrane. The highest flux was obtained using 0.3 wt% MWCNT loaded membrane with the highest rejection of 98.8%. SEM analysis confirmed that the excess amount of particles caused agglomeration and negatively affected the desalination performance.

Induction of chromosome malsegregation by nanomaterials

2010 ◽  
Vol 38 (6) ◽  
pp. 1691-1697 ◽  
Author(s):  
Laetitia Gonzalez ◽  
Ilse Decordier ◽  
Micheline Kirsch-Volders
Keyword(s):  
Cellular Systems ◽  
Amorphous Sio2 ◽  
Cellular Assays ◽  
Different Types ◽  
Multi Walled Carbon Nanotubes ◽  
New Methodologies ◽  
Definition Of ◽  
Walled Carbon Nanotubes ◽  
Testing Protocols

NMs (nanomaterials), defined as materials with at least one dimension smaller than 100 nm, are able to induce genotoxic effects. One of the hypotheses of the mode-of-action in which they exert their genotoxic potential is to mechanically interfere with subcellular structures, in particular the microtubules. In the present paper, we review studies exploring interactions between NMs and tubulin; therefore a PubMed literature search was performed. From this search 12 studies, applying both acellular and cellular assays, were retrieved and are summarized according to endpoint and particle type. These studies show that there are interactions between different types of NMs and tubulins in both acellular and cellular systems. For several types of NMs, the multi-walled carbon nanotubes, amorphous SiO2, TiO2 and CoCr, an induction of aneuploidy was observed in vitro. There is, therefore, a critical need to assess the capacity of NMs to interfere with the cytoskeleton, and in particular the tubulins. This might require definition of relevant dosimetry, adaptations of some testing protocols, possibly development of new methodologies and studies on a larger size-range of NMs.

scholarly journals Multiphoton luminescence imaging of chemically functionalized multi-walled carbon nanotubes in cells and solid tumors

2015 ◽  
Vol 51 (45) ◽  
pp. 9366-9369 ◽  
Author(s):  
N. Rubio ◽  
L. M. Hirvonen ◽  
E. Z. Chong ◽  
J. T. W. Wang ◽  
M. Bourgognon ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solid Tumors ◽  
Photoluminescence Properties ◽  
Luminescence Imaging ◽  
Non Linear ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Potential Use ◽  
In Cells

A simplified scheme showing the non-linear photoluminescence properties of f-MWNTs and their potential use as imaging tools in cells and tumors.

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