Abstract
Carbon nanotubes (CNTs), due to their superlative mechanical and physical properties, have shown a high potential to improve properties of polymeric composites. Adding CNTs into polymers at very low weight fractions can improve mechanical properties of the resulting nanocomposites. In the present paper, multi-walled carbon nanotubes (MWCNTs) at different weight ratios (0.05, 0.1, and 0.5 wt.%) were added to polyester. Mechanical stirring and sonication technique were used to achieve good dispersion state of MWCNTs in the polymeric matrix. The results of mechanical tests (tensile and flexural) exhibit improvements of tensile and flexural strengths by 6% and 20%, respectively, at only 0.05 wt.% MWCNT. Improvements in Young's modulus and flexural modulus were also observed. Scanning electron microscopy was employed to determine the dispersion state of nanotubes in the matrix as well as the fracture surface properties.
Highlights
Due to the unique properties and characteristics of inorganic–organic nanohybrid materials in various industries, there is a great desire to prepare and study their applications
Temperature was evaluated in the range of 150–200 °C and the reaction time was evaluated in the range of 2 to 6 days and we concluded that suitable nanocrystals are formed at the temperature of 180 °C in 4 days
The results indicate that the ratio of Ni/Mo weight percentages is increased by raising the pH value
Summary
Due to the unique properties and characteristics of inorganic–organic nanohybrid materials in various industries, there is a great desire to prepare and study their applications. The engineering of nanocrystals of inorganic–organic hybrid materials is focused on the two aspects in terms of their structural flexibility [6] and, secondly, their application as a catalyst, as gas storage, as ion sieve, in photochemistry and in electromagnetism [7,8,9,10,11,12,13,14]. Inorganic–organic hybrid materials composed of Mo and PPDA have been studied mostly in terms of crystal structure [32,33,34], but preparation of their nanoparticles has not been reported. The hydrothermal method has been used for the synthesis of NiSO4 and MoO3 nanostructure crystals using PPDA spacers. The effect of factors influencing the hydrothermal process and pH values on the morphology of nanocrystals as well as their luminescence properties has been discussed
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