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Mani Ganesh,Abidov Sch Aziz,Udumansha Ubaidulla,Pushparaj Hemalatha,Arthanari Saravanakumar,Rramaswamy Ravikumar,Mei Mei Peng,최은영,장현태 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
Novel silver nanoparticles-decorated chitosan (CS)-polyvinyl alcohol (PVA) composite electrospunnanofibers, loaded with sulfanilamide for enhanced wound healing have been developed. Herein, formicacid was used as a reducing agent to produce in situ colloidal silver nanoparticles (AgNPs) in thecomposite polymeric solution with the active agent sulfanilamide. The prepared electrospun fiberswere characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM),X-ray diffraction, ultraviolet spectroscopy, and thermal gravimetric analysis (TG). Further, in vitrorelease, antimicrobial properties and in vivo wound healing activity were evaluated. The results revealedthat the composite fibers displayed a synergistic antibacterial and wound healing activities.
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).
Synthesis, Characterization and Functionalization of the Coated Iron Oxide Nanostructures
Tursunkulov, Oybek,Allabergenov, Bunyod,Abidov, Amir,Jeong, Soon-Wook,Kim, Sungjin The Korean Powder Metallurgy Institute 2013 한국분말재료학회지 (KPMI) Vol.20 No.3
The iron oxides nanoparticles and iron oxide with other compounds are of importance in fields including biomedicine, clinical and bio-sensing applications, corrosion resistance, and magnetic properties of materials, catalyst, and geochemical processes etc. In this work we describe the preparation and investigation of the properties of coated magnetic nanoparticles consisting of the iron oxide core and organic modification of the residue. These fine iron oxide nanoparticles were prepared in air environment by the co-precipitation method using of $Fe^{2+}$: $Fe^{3+}$ where chemical precipitation was achieved by adding ammonia aqueous solution with vigorous stirring. During the synthesis of nanoparticles with a narrow size distribution, the techniques of separation and powdering of nanoparticles into rather monodisperse fractions are observed. This is done using controlled precipitation of particles from surfactant stabilized solutions in the form organic components. It is desirable to maintain the particle size within pH range, temperature, solution ratio wherein the particle growth is held at a minimum. The iron oxide nanoparticles can be well dispersed in an aqueous solution were prepared by the mentioned co-precipitation method. Besides the iron oxide nanowires were prepared by using similar method. These iron oxide nanoparticles and nanowires have controlled average size and the obtained products were investigated by X-ray diffraction, FESEM and other methods.
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.
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.