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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.
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.
A Novel Route to Synthesize Hypercross-linked Conjugated Polystyrene for CO₂ Sorption
Rajangam Vinodh(라자감 비노드),Aziz Abidov(아비도프 아지즈),Mei Mei Peng(펭메이메이),Cadiam Mohan Babu(칸디암 모한 바부),Muthiahpillai Palanichamy(무따이 팔라리차미),Wang Seog Cha(차왕석),Hyun-Tae Jang(장현태) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
Polystyrene is cross-linked to generate micropores for sorption applications. Herein, we report for the first time, hypercross-linking of polystyrene in the presence of Friedel-Crafts catalyst, FeCl3 without a cross-linker. For comparison, polystyrene was also hypercross-linked with a cross-linker, dimethoxy methane with the same catalyst. The cross-linking and de-hydrogenation of cross-links to quinonoid formation were confirmed by FT-IR and 13C-NMR techniques. The hyper cross-linked polymers (HCPs) were also characterized by TGA, DRS-UV, SEM, BET and CO₂ sorption techniques. All the HCPs showed a maximum of 5 weight % CO₂ sorption at 25 °C and 1 atm. The same polymers could also be applied for the sorption of other air pollutants.
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.