By Kamal K. Kar, Jitendra K. Pandey, Sravendra Rana
Volume B types one quantity of a guide approximately Polymer Nanocomposites. quantity B offers with Carbon nanotube established polymer composites. The guidance, structure, characterisation, homes and alertness of polymer nanocomposites are mentioned inside of a few 25 chapters. each one bankruptcy has been authored by way of specialists within the respective field.
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Extra info for Handbook of Polymer Nanocomposites. Processing, Performance and Application: Volume B: Carbon Nanotube Based Polymer Composites
As previously mentioned, the principal methods for achieving dispersion of CNTs can be categorized as mechanical, physical, and chemical. 3 of this article dealt with chemical approaches to improving CNT dispersion. This section will focus on the mechanical methods currently under investigation, including ultrasonication and high-shear and high-impact mixing. It should be noted that mechanical methods do not permanently stabilize the dispersion . Sonication is a commonly used technique for distributing CNTs in an epoxy matrix and involves the application of ultrasound energy to agitate particles in a solution.
O3 (5 wt% in O2) was continuously passed through the reaction chamber at room temperature during the oxidation process. 5 to 6 h. For H2O-assisted ozonolysis, H2O and O3 were introduced into the reaction chamber simultaneously. The humidity in the chamber and the flow rate of the mixture were kept at approximately 60 % and 150 L/h, respectively . Peng et al. described a method for CNT oxidation at room temperature using O3 with added H2O vapor. The resulting CNTs were characterized using Fouriertransform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) spectroscopy, and transmission electron microscopy (TEM).
This could limit the mobility of the matrix backbone and therefore improve the mechanical properties of epoxy composites . Fracture toughness has been demonstrated to be improved by surface functionalization of CNTs, which was attributed to the improved interfacial bonding strength between the nanotubes and the epoxy matrix. This would lead to a suppression of debonding at the interface and crack propagation . Many studies have shown that CNTs are able to elastically deform under relatively large stresses, both in tension and compression, leading to highly energy-absorbing processes.