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RAJANGAMVINODH,Aziz Abidov,Muthiah Pillai Palanichamy,차왕석,장현태 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
Herein, we report a solid matrix of amino alkyl siloxane of porous nature with alkyl groups thoroughly distributed in the matrix by constrained growth technique; this sorbent is ideal for CO2 sorption. The sorbent exhibits higher sorption (4 mmol CO2/g), and selectivity to CO2. It is enriched with voids, and exhibits adequate thermal stability. Adsorption occurred below 100 °C, while desorption occurred between 100 and 200 °C. When the sorbent underwent both sorption and desorption of CO2, a sharp enthalpy change was observed; such an enthalpy change is a crucial characteristic of cyclic sorption desorption (CSD).
RAJANGAMVINODH,정의민,Mani Ganesh,Mei Mei Peng,Aziz Abidov,Muthiah Pillai Palanichamy,차왕석,장현태 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
We synthesized highly porous hypercross-linked polymers of (4, 40-bis ((chloromethyl)-1, 10-biphenylbenzylchloride)) [designated as HCP-BCMB] and (1, 3, 5-triphenyl benzene-1, 4-bis (chloromethyl)benzene) [designated as HCP-TPB] as sorbents for the removal of volatile organic compounds such aschloroform, toluene and ethyl methyl ketone under humidified conditions. The micro-porous nature ofthe hypercross-linked polymers (pore diameter 0.8 nm) was confirmed by Brunner–Emmet–Teller (BET)and scanning electron microscopy (SEM) techniques. HCP-TPB showed a maximum adsorption of 32.8wt% for toluene. In addition, both the HCPs exhibited CO2 adsorption close to 6 wt% at 25 8C and 1 atm.
Hypercross-linked lignite for NOx and CO2 sorption
RAJANGAMVINODH,김대경,Mani Ganesh,Mei Mei Peng,Aziz Abidov,N. Krishnamurthy,Muthiah Pillai Palanichamy,차왕석,장현태 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.23 No.-
We are reporting for first time, hypercross-linking of lignite for the sorption of NOx and CO2. Hypercross- linking was carried out with dimethoxy methane. The CO2 sorption capacity of hypercross-linked lignite coal was approximately three fold higher than the virgin coal at 313 K and 1 atm. 29 wt% of NOx adsorption was observed at 298 K and 1 atm. Both the lignite and its hypercross-linked forms were characterized by Fourier transform infra red (FTIR), diffuse reflectance ultra violet–vis (DRS UV–vis) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Brunauer Emmet Teller (BET) adsorption isotherm and x-ray diffraction (XRD) studies.
RAJANGAMVINODH,장현태,Aziz Abidov,Mei Mei Peng,CADIAM MOHAN BABU,Muthiah Pillai Palanichamy,차왕석 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
In this paper we report a semiconducting porous carbon material for supercapacitor application. Semiconducting carbon material was prepared by two step method. First, hypercross-linked polymers(HCPs) of phloroglucinol and a,a0-dichloro-p-xylene was prepared by a simple Friedel Crafts alkylation,and second, the synthesized microporous HCPs was subjected into carbonization at 700 8C in a heliumatmosphere. The carbonized sample was characterized into cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy in 1 M sodium sulphate aqueous solution forsupercapacitor applications. The specific capacitance of carbonized materials is found to be 86 F g 1 at acurrent density of 0.1 A g 1.
Rajangam Vinodh,Yesudass Sasikumar,김희제,라지아추단,이문석 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
Supercapacitors have received a great attention owing to their exceptional characteristics like outstandingcycle life, high power and eco-friendly nature. In recent years, chitin/chitosan derived porous carbonelectrode materials for energy storage applications have gained a substantial consideration due to theirbroad accessibility, high porosity, less weight, natural biodegradability, renewability, and eco-friendly. More importantly, chitin/chitosan biopolymers have a linear long chain-like moiety attached to functionalizethe surface groups with -b-D glucosidic linkage which can be exploited as templates for constructingelectrode materials with tunable and well-definite geometrics. The main focus was on porous carbonderived from heteroatoms doped chitin/chitosan biopolymers along with their composites in supercapacitorapplications. In addition, the overall behaviors in supercapacitor application have been discussed interms of specific capacitance, specific surface area, voltage window, energy density, and power density. Furthermore, the present review addresses the up-to-date development accomplished in chitin/chitosanmaterials for supercapacitor electrodes. Eventually, the recent challenges and forthcoming perspectivesof the chitin/chitosan biopolymer derived porous carbon electrode materials with respect to the supercapacitor’sperformance were thoroughly tinted along with future energy storage devices, such as fuelcell, solar cells and lithium ion battery.
Synthesis and Characterization of 1-octyl 2-cyano Acrylate for Wound Healing Applications
Rajangam Vinodh,Cadiam Mohan Babu,Aziz Abidov,Rramaswamy Ravikumar,Muthiahpillai Palanichamy,Eun Young Choi,Hyun Tae Jang 보안공학연구지원센터 2016 International Journal of Bio-Science and Bio-Techn Vol.8 No.1
Cyanoacrylate glues are quick setting materials which rapidly cure to hard, clear glassy resins. Its synthesis too has not been reported in the open literature so far. Synthetic methods, which engage esterification of cyanoacetic acid with a preferred alcohol, polymerization by knoevenagel condensation and successive depolymerization, are applied to the synthesis of lower membered alkyl cyanoacryaltes in which the alkyl groups carry less than 8 carbons. We have synthesized 1-octyl cyanoacetate by a traditional method involving p-toluene sulphonic acid as the catalyst. In the second step, we have attempted the preparation of poly (n-octyl cyanoacrylate) by the reaction of formaldehyde with n-octyl-2-cyanoacetate in the presence of both piperidine and potassium carbonate in the absence of any solvents. Its FTIR spectrum confirmed its functional groups: Its –OH stretching yielded a broad band around 3400 cm-1. The polymer was depolymerized using poly phosphoric acid catalyst under vacuum to obtain the monomer. A simple method of obtaining monomer was also attempted by the reaction of 1-octyl- 2-cyano acetate and diiodomethane in the presence of potassium carbonate. This process directly yields the monomer. The second method looks better than the others, and it can be applied to any type of alcohols.
Preparation and characterization of RGO‑incorporated hypercross‑linked polymers for CO2 capture
Rajangam Vinodh,Cadiam Mohan Babu,Aziz Abidov,Muthiahpillai Palanichamy,Wang Seog Cha,Hyun Tae Jang 한국탄소학회 2019 Carbon Letters Vol.29 No.1
The growing demand for nano-structured composite materials and sustainable processes for next generation CO2 capture technologies has necessitated the need to develop novel and cost-effective synthetic routes for solid CO2 adsorbents based on hypercross-linked polymers (HCPs) and reduced graphene oxide (RGO) microporous sorbent materials with improved physico-chemical properties. The most important selection is modification of the synthesized microporous sorbent materials by the incorporation of RGO, giving rise to composite materials that combine the properties of both. These hybrid materials will be of great potential for carbon capture and storage (CCS) applications, especially for post-combustion CO2 capture, owing to the increase in CO2 capturing efficiency and selectivity to CO2 compared to other flue gases. Herein, we report a facile and effective approach for fabrication of HCPs-supported reduced graphene oxide composites. The microporous HCPs was synthesized using 4,4′-bis(chloromethyl)-1,1′-biphenyl monomer by Friedel–Crafts alkylation. The RGO was prepared by modified Hammers method. The as-synthesized composites were characterized by TEM, SEM, FTIR, TGA and N2 adsorption–desorption isotherm. The HCP/RGO composite showed maximum CO2 adsorption of 5.1 wt% than the HCPs alone at 40 °C and 1 atm.