In this paper, we report a flame deposition method to prepare carbon nanoparticles (CNPs) from coconut oil. The CNPs were further modified with a piranha solution to obtain surfacecarboxylated carbon nanoparticles (c-CNPs). When used as an anode for sodium-ion batteries, the CNPs and c-CNPs respectively delivered discharge capacities of 277 and 278 mAhg-1 in the second cycle at a current density of 100 mAg-1. At the 20 th cycle, the capacities of CNP and c-CNPs were 217 and 206 mAhg-1 respectively. The results suggest that modification of the CNPs with the piranha solution improved neither the charge storage capacity nor the stability against cycling in a sodium-ion battery. When the CNP and c-CNP were used an anode in a lithium-ion battery, 2 nd-cycle discharge capacities of 741 and 742 mAhg-1 respectively at a current density of 100 mAg-1 were obtained. After 20 cycles the capacities of CNP and c-CNP became 464 and 577 mAhg-1 respectively, showing the cycling stability of the CNPs was improved after modification. The excellent cycling performance, high capacity and good rate capability make the present material as highly promising anodes for both sodium-ion and lithium-ion batteries.

This paper investigates the structural modifications of castor oil, a renewable resource, to develop functional organic inorganic hybrid coatings. A novel methodology has been developed to introduce hydrolyzable −Si−OCH 3 groups in the castor oil backbone that has been used subsequently for the development of polyurethane/urea−silica hybrid coatings. The alkoxysilane functional castor oil (ASCO) was characterized by techniques such as 1 H, 13 C, and 29 Si nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared (FTIR) spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The ASCO was further reacted with different ratios of isophorone diisocyanate (IPDI) to get an isocyanate-terminated hybrid polyurethane prepolymer that was cured under atmospheric moisture to get the desired coating films. The glass transition temperatures (Tg) of the hybrid networks were found to be in the range of 29−70 °C, and the water contact angles were in the range of 75°−82°. The Tg and hydrophobic character of the hybrid coating films found to increase with an increasing NCO/OH ratio. The thermo-mechanical, viscoelastic, swelling, morphological, and contact angle properties of these films were evaluated. The alkoxy silane-modified castor oil-based coatings have shown better mechanical and viscoelastic properties in comparison to the control (unmodified castor oil) coatings. This work provides an effective and promising way to prepare hydrolyzable silane functional castor oil for high performance hybrid coatings.

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This review article presents an overview of the application of 1,2,3-triazoles in the design of various high performance organic coatings with properties like anti-corrosive, anti-microbial, self-healing, hybrid nanocomposite, bio degradable etc.

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