Laboratory for Advanced Research in Polymeric Materials LARPM

Bhubaneshwar, India

Laboratory for Advanced Research in Polymeric Materials LARPM

Bhubaneshwar, India

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Pandey P.,k-Technology | Mohanty S.,k-Technology | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,k-Technology | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Journal of Materials Engineering and Performance | Year: 2014

This study reports an investigation on the effect of non-ionic surfactant (Triton X-100) on the dispersion of multiwalled carbon nanotubes (MWNTs) inside the polymer matrix. Adsorption of triton X-100 to the MWNTs was confirmed through FTIR. A reduced bundling of MWNT fibrils were noticed in Triton X-100 modified MWNTs (Tr-MWNTs). The polymer nanocomposites were prepared via melt blending technique. The optimization of loading ratio of the MWNTs and Tr-MWNTs was carried out on the basis of mechanical properties. Dynamic mechanical analysis exhibited the much uniform dispersion of the Tr-MWNT inside polymer matrix as compared to that of MWNTs. A faster rate of crystallization was noticed in case of MWNT reinforced nanocomposites, however, a strong filler-polymer interaction could be seen in case of Tr-MWNT filled nanocomposites. Optical microscopic analysis exhibited similar effect of MWNT and Tr-MWNT on the spherulite size of the polymer. © 2014, ASM International.


De S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Central Institute of Plastics Engineering and Technology CIPET | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Journal of Inorganic and Organometallic Polymers and Materials | Year: 2015

Abstract: A promising green biosensing material, nano-cerium oxide (CeO2) decorated reduced graphene oxide (RGO) nanohybrid reinforced chitosan (CS) nanocomposite has been synthesized as a transducer phase for the effective immobilization of glucose oxidase (GOx) enzyme. CeO2 nanoparticles were grown on the RGO nanosheet by facile hydrothermal treatment. The effective growth of synthesized nano-CeO2 on the RGO was evident from X-ray diffraction, scanning electron microscopy and transmission electron microscopy and Raman analysis. Morphological studies confirmed the effective immobilization of GOx on the chitosan nanocomposites modified FTO electrode. The electrocatalytic response of the GOx/nano-CeO2–RGO/CS/FTO bioelectrode was investigated using electrochemical impedance and cyclic voltammetry studies. The obtained results indicate that as compared with bare CeO2 nanoparticles and RGO, the nano-CeO2/RGO nanohybrid shows significant electrochemical activity and provides an adequate microenvironment for effective enzyme immobilization due to the excellent synergism between the CeO2 nanoparticles and RGO nanosheet. Graphical Abstract: Scheme 1: Schematic diagram of graphene nanohybrid reinforced Chitosan nanocomposite modified biosensing matrix.[Figure not available: see fulltext.] © 2015, Springer Science+Business Media New York.


Choudhury M.,Laboratory for Advanced Research in Polymeric Materials LARPM | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.,Central Institute of Plastics Engineering and Technology CIPET
Journal of Biomaterials and Tissue Engineering | Year: 2015

In the present investigation, porous PLA microstructural biodegradable scaffolds useful for mimicking human anatomy in biomedical and tissue engineering; was fabricated using NaCl as porogen in three different solvents i.e., 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), dichloromethane (DCM) and chloroform (CF), using solvent casting particulate leaching method. The morphology, structure and thermal behaviour of the PLA scaffolds for porosity measurement were evaluated using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR); thermogravi-metric analysis (TGA) and differential scanning calorimetry (DSC). The developed porous scaffolds were further characterized for porosity measurement, solvent uptake property and water absorption capacity at different temperatures. PLA/CF scaffold depicted higher porosity factor (93%) along with enhanced water uptake capacity (220%) as against PLA/HFIP scaffold (75%). However PLA/DCM scaffolds illustrated more thermal stability as compared with PLA/HFIP and PLA/CF scaffolds. © 2015 American Scientific Publishers All rights reserved


Johari A.P.,Laboratory for Advanced Research in Polymeric Materials LARPM | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Kurmvanshi S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
ACS Sustainable Chemistry and Engineering | Year: 2016

Cellulose microfibrils (CMFs) were prepared from sisal fiber (SF) and characterized using Fourier transform infrared and X-ray diffraction analysis. Further, modification of CMF has been carried out using alkali and silane. Thereafter, modified as well as unmodified CMF reinforced poly(lactic acid) (PLA) biocomposites were fabricated using melt blending technique followed by injection molding. PLA has also been grafted with maleic anhydride and fabricated with unmodified CMF. Differential scanning calorimetry measurements confirmed that the addition of CMF accelerates the crystallization process of the PLA matrix. The NaOH treated SF, i.e. NCMF, reinforced biocomposites exhibited optimum mechanical strength which increased by 21.4% over that of CMF reinforced PLA biocomposites. A silane treated PLA biocomposite showed a maximum impact strength which was 24% higher than that of virgin PLA. The thermal stability of PLA/CMF biocomposites has been evaluated using thermogravimetric analysis. The scanning electron micrographs also confirmed the uniform dispersion of CMF within the PLA matrix. © 2016 American Chemical Society.


Bonda S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Central Institute of Plastics Engineering and Technology CIPET | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Iranian Polymer Journal (English Edition) | Year: 2015

This study covers the detailed analysis of mechanical, dynamic mechanical, thermal and morphological properties of the nanostructured fly ash (NFA) filled polypropylene (PP)/acrylonitrile butadiene styrene (ABS) blend composites. The melt blended standard samples were molded and considered for characterization studies. The loading of NFA was optimized at 5 wt% based on the mechanical properties of the blend composite. Various models were adopted to assess the mechanical properties of the blend composites. Dynamic mechanical properties were analyzed as a function of temperature. Cole–Cole plots of blend composites revealed the physical compatibilization of NFA and blend phases. Differential scanning calorimetry results showed that NFA particles accelerated the crystallization process and reduced the crystallization time by 12 s. Thermal stability of the PP/ABS blend has found to be improved with the addition of NFA particles and a detailed degradation kinetic study has also been conducted. XRD pattern of the blend composites has also indicated the NFA intervention at the blend interfaces and this further evidenced from SEM and TEM magnified micrographs. The morphological and rheological properties supported the physical interaction of NFA particles within the blend phases and interface. Hence, the study noticed that NFA acted as physical compatibilizer between PP and ABS blend phases. © 2015, Iran Polymer and Petrochemical Institute.


Johari A.P.,Laboratory for Advanced Research in Polymeric Materials LARPM | Kurmvanshi S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
International Journal of Biological Macromolecules | Year: 2016

Cellulose microfibrils (CMF) were extracted from sisal fiber and characterized. Biocomposites of PLA reinforced with CMF were fabricated employing melt blending technique followed by injection moulding. The biocomposites were subjected to various characterization studies to investigate the effect of CMF within the PLA matrix. Differential scanning calorimetry (DSC) measurements confirmed that the addition of CMF accelerates the crystallization process of PLA matrix. Addition of 5 wt.% of CMF with and without compatibilizers and plasticizers such as maleic anhydride, polyethylene glycol and acetyltributyl citrate in PLA improved the crystallization of PLA up to 100 °C. MA grafting gave moderate effects on both the stiffness and ductility, exhibiting optimum properties. © 2015 Elsevier B.V.


De S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Central Institute of Plastics Engineering and Technology CIPET | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Journal of Materials Engineering and Performance | Year: 2014

Abstract: A candid approach to analyze the performance characteristics of phenyl phosphonate-functionalized zirconium oxide and pure zirconium oxide (ZrO2) fillers reinforced chitosan nanocomposites and their suitability as a potential biomaterial for the development of transducer surface in biosensing device has been investigated in this communication. Functionalization of ZrO2 has been carried out using sulfophenylphosphonate which was confirmed using Fourier transform infrared spectrographs. The electrostatic intercalation of chitosan with filler particles was monitored using electrochemical impedance analyzer which exhibits lowest bulk resistance which is highly effective for ionic switching. Incorporation of zirconium sulfophenylphosphonate (ZrSP) the ionic conductivity of the chitosan film attained a value of 1.2 × 10−6 S/cm as compared to the unmodified one which is a prefeasibility work for the fabrication of biosensing platform. Variation in performance characteristics has been evaluated through morphological and thermal characterization. TGA and DSC analysis reveal that the thermal stability and decomposition temperature of the nanocomposites were improved by the addition of reinforcing filler particles. XRD and SEM and TEM results support the above assumption. The continuous alignment of the proton transfer channels of the nanocomposites was thoroughly investigated by AFM analysis which revealed phase morphology for improved enzyme entrapment. Further, surface functionalized nanofillers result considerable increment of mechanical properties in terms of elastic modulus and tensile stress.Graphical Abstract: [Figure not available: see fulltext.]. © 2014, ASM International.


de S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Central Institute of Plastics Engineering and Technology CIPET | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Central Institute of Plastics Engineering and Technology CIPET | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Bioprocess and Biosystems Engineering | Year: 2015

Abstract: The present study summarizes the designing of a green transducer phase based on nano-cerium oxide (CeO2) decorated reduced graphene oxide (RGO) reinforced chitosan nanocomposites as an effective enzyme immobilizer and bio-sensing matrix for glucose analyte. Also, it scrutinizes the biocompatibility and cell viability of the synthesized nanohybrid with human fibroblastic macrophage cell line. CeO2 nanoparticles (NPs) were successfully grown on graphene nanosheet in the presence of cationic surfactant followed by facile hydrothermal treatment. The eventual growth of synthesized CeO2 nanocrystals on the graphene layer was confirmed from X-ray diffraction (XRD), transmission electron microscopy (TEM) and Raman analysis. The biocompatibility of the synthesized nanohybrid was also evident from the MTT assay. Glucose oxidase (GOx) was employed on the green polymer nanocomposites modified FTO electrode to fabricate an enzymatic bioelectrode. The electroanalytical response of the GOx/nano-CeO2/RGO/CS/FTO bioelectrode towards electrooxidation of glucose analyte was investigated by electrochemical impedance (EIS) and cyclic voltammetry (CV) study. The resulting biosensor exhibited a good electrochemical response to glucose within the linear detection range of 0.05–6.5 mM with a low detection limit of 2 μM and a sensitivity of 7.198 μA mM−1 cm−2. The bioelectrode also showed good shelf life (~10 weeks) and negligible interfering ability under controlled environment. The obtained results indicate that nano-CeO2/RGO nanohybrid based chitosan nanocomposites achieve a biocompatible biosensing platform for effective enzyme immobilization due to the excellent synergistic effects between the CeO2 nanoparticles and graphene sheet. Graphical abstract: [Figure not available: see fulltext.] © 2015 Springer-Verlag Berlin Heidelberg


Sarath P.,Central Institute of Plastics Engineering and Technology CIPET | Bonda S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Mohanty S.,Laboratory for Advanced Research in Polymeric Materials LARPM | Nayak S.K.,Central Institute of Plastics Engineering and Technology CIPET | Nayak S.K.,Laboratory for Advanced Research in Polymeric Materials LARPM
Journal of Material Cycles and Waste Management | Year: 2016

The plastic components from waste mobile phones were sorted and characterized using visual, spectroscopic and thermal methods. The sustainable strength of the recovered plastics was investigated by comparing their mechanical and thermal properties with commercially used reference materials. The results revealed that the recovered polymers have significant potential to be reused. However, some properties, such as impact strength and tensile modulus, are significantly low compared to virgin materials and need further improvement. The samples were also tested for brominated flame retardants (BFRs) using gas chromatography–mass spectrometry technique, and the results indicated the absence of BFR in recovered plastics; hence, these can be processed without any risk of BFR toxicity. © 2016 Springer Japan


PubMed | Laboratory for Advanced Research in Polymeric Materials LARPM
Type: | Journal: International journal of biological macromolecules | Year: 2016

Cellulose microfibrils (CMF) were extracted from sisal fiber and characterized. Biocomposites of PLA reinforced with CMF were fabricated employing melt blending technique followed by injection moulding. The biocomposites were subjected to various characterization studies to investigate the effect of CMF within the PLA matrix. Differential scanning calorimetry (DSC) measurements confirmed that the addition of CMF accelerates the crystallization process of PLA matrix. Addition of 5 wt.% of CMF with and without compatibilizers and plasticizers such as maleic anhydride, polyethylene glycol and acetyltributyl citrate in PLA improved the crystallization of PLA up to 100 C. MA grafting gave moderate effects on both the stiffness and ductility, exhibiting optimum properties.

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