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February 2015 - February 2016
Publications
Publications (55)
This study proposed an innovative approach to the development of sustainable and biodegradable food packaging materials by incorporating inexpensive nano-silica (SiO2NPs) in designed hydrogel (CSG) film employing biodegradable polymers: synthetic polymer polyvinyl alcohol (PVA), natural polymer - carboxymethyl cellulose (CMC) and protein-based bio-...
In this study, PDMS incorporated with SWCNTs have been fabricated via solution casting method for industrial applications and characterized by the analyses of SEM, FTIR, TGA, AFM, and MST. The modified membranes were further analyzed for CO2, O2, and N2 gas permeability. The strategic membranes have five different weight ratios (0.013, 0.025, 0.038...
Declining freshwater resources along with their pollution are threatening the life existence on earth. To meet the freshwater demand, one of the most appropriate and possible ways which has been adopted all over the world is to reuse wastewater by removing its impurities. Among many water pollutants, natural organic matter (NOM) is found to be resp...
The designed novel hybrid laminate membranes have been synthesized with silane surface functionalized Kevlar fabric packed between two layers of cobalt bismuth nanoferrites (CBF)‐loaded cellulose acetate. Primarily, nanoreinforcement; Co‐Bi nano‐ferrites were synthesized using sol–gel technique and functionalization is carried out using 3‐aminpropy...
In this study, novel spinel ferrites nanocomposites containing aluminum chromium zinc nanoferrites, Al 0.5 Cr 0.5 Zn 0 Fe 2 O 4 and Zn 0.5 Cr 0.5 Al 0 Fe 2 O 4 have been fabricated and characterized to determine the properties of highly stable conduction materials. The nanocomposites have been synthesized through the sol-gel method. Zinc and alumin...
Bacterial contamination is one of the leading causes of water pollution. Antibacterial polyurethane/cellulose acetate membranes modified by functionalized TiO2 nanoparticles were processed and studied. TiO2 nanoparticles were prepared and ultraviolet (UV) irradiated to activate their photocatalytic activity against Escherichia coli (E. Coil) and Me...
The double perovskite-based materials have attracted considerable attention of scientists owing to their potential applications in optoelectronic and transport properties. Here, we report the optoelectronic and transport properties of Rb2YInX6 (X = Cl, Br, I) double perovskites by DFT computations. By computing tolerance factor (tG), enthalpy of fo...
The commentary discusses the last three decades of research, development and successful commercialisation of Carbon Nanotubes (CNTs) and their related composites. Whilst the number of publications are on the decline and despite of major technical challenges, CNTs continue to emerge as significant materials due to their superlative combination of pr...
A novel conductive nano material, nano spinel ferrites having the composition of calcium chromium magnesium nanoferrites (Ca x Cr 0.5x Mg 0.5 Fe 2 O 4), was fabricated via sol-gel auto combustion process. The main objective was to fabricate highly stable nanocomposite as conductive material. Reaction among highly pure grade magnesium nitrate Mg (N...
The effects of Mg ion doping on the cobalt-based spinel ferrites nanoparticles synthesized via sol–gel auto-combustion method have been investigated. Dopant concentration values varied in Bi0.2MgxCo0.8−xFe2O4 at x = 0.0, 0.15, 0.35, 0.55, 0.7 and 0.8, respectively. The variation of Mg-Co substitution has a significant effect on the structural, morp...
The spinel nano-ferrites with composition Co0.5Mg0.25Cd0.25Fe2-xCexO4 (0.0 ≤ x ≤ 0.2 with a step interval of 0.05) synthesized by sol-gel auto combustion method. Samples sintered at a significant temperature of 800 °C for 8 h. XRD confirmed the formation of spinel matrix and reduction in lattice constant from 8.3941 Å to 8.3598 Å by increasing Ce³⁺...
In this study, novel composite membrane of functionalized multi-walled carbon nanotubes (F-MWCNTs) polyvinyl pyrolidine (PVP) and sodium alginate (Na-Alg) with unique characteristics were synthesized for the application of reverse osmosis (RO) desalination. The MWCNTs in different amounts were systematically and uniformly dispersed in PVP/Na-Alg po...
In this study, biodegradable polymeric films (BPFs) based on chitosan and acrylic acid cross-linked with 3-aminopropyl triethoxysilane (APTES) were developed for water retention and soil-conditioning applications in areas sufferings from water scarcity. A series of BPFs were prepared by varying the amount of silica nanoparticles (SiNPs) (0.67% to 2...
The objective of this work is to fabricate hydrogel films which are biodegradable and also fit for packaging applications. The hydrogel films were prepared by the reaction of polyvinyl alcohol and gelatin with and without 3-aminopropyltriethoxysilane (APTEOS) cross-linker. The hydrogel films were then characterized by FTIR spectroscopy, degree of s...
The present research reports the influences of variant phenolic resin concentrations on the thermo-mechanical and ablation characteristics of ethylene propylene diene monomer (EPDM) elastomer. Backface temperature acclivity (BTA), charring rates, and insulation indexes were executed for the fabricated composite specimens. It was noticed that BTA wa...
Nanofluid is well known as smart fluid which has high ability to recover oil. Therefore, it gains more significant effect in oil and gas industry. With the low concentration of nanofiller in nanofluid is used to enhance the numerous characteristics for oil recovery applications. Then, the main feature is the size of reinforcing agent and properties...
A series of polyurethane membranes were synthesized through poly-addition polymerization for reverse osmosis application. Poly (ethylene glycol) with different molecular weights was used as a soft segment and structural and performance properties of membranes were investigated. FTIR spectra of membranes verified the presence of incorporated monomer...
Multiwall carbon nanotube (CNT)-filled high density polyethylene (HDPE) nanocomposites were prepared by extrusion and considered for their suitability in the offshore sheathing applications. Transmission electron microscopy was conducted to analyse dispersion after bulk extrusion. Monolithic and nanocomposite samples were subjected to accelerated w...
An absolutely novel membrane of Poly (vinylchloride-co-vinylacetate) (PVCA) copolymer and polydimethylsiloxane (PDMS) with five different ratios were fabricated and used for further characterizations. Dense membranes of 50 μm were synthesized with ratios of PDMS and PVCA 99:1, 98:2, 97:3, 96:4 and 95:5 respectively. The separation performance is ch...
In order to enhance characteristic performance of cellulose acetate (CA) membranes, a novel nanofiller synergy is adopted herein for desalination purpose. Activated zinc oxide and aero-silica synergy in seven different ratio based combinations were introduced into CA matrix adopting solution mixing technique. The functionalized nanofillers loading...
A novel tweakable nanocomposite was prepared by spark plasma sintering followed by systematic oxidation of carbon nanotube (CNT) molecules to produce alumina/carbon nanotube nanocomposites with surface porosities. The mechanical properties (flexural strength and fracture toughness), surface area, and electrical conductivities were characterized and...
The novel silane crosslinked (TEOS) hydrogels based on eco-friendly biodegradable chitosan/guargum were prepared by blending with PEG to develop pH sensitive hydrogels (CGP) and achieved its hydrophilicity and target specificity for controlled release of drug. The crosslinker amount was varied to analyze its effect on the hydrogel properties and we...
Graphene was incorporated into elastomeric Matrices using dispersion kneader and two roller mixing mill to fabricate ablative nanocomposites used in hyperthermal environment encountered by space vehicle or rocket motor. The addition of graphene in the host matrix has remarkably reduced the backface temperature elevation during the ablation testing...
The present study aimed to identify the potential of modified nanoreinforcement (multiwalled carbon nanotubes; m-MWCNTs) to attenuate the thermal transport/decomposition/transition and mechanical aspects of three different polymeric matrices. In order to develop strong interfacial interaction between the host matrix and the incorporated nanotubes,...
Novelty of presented research is focused on ablation and thermomechanical characteristics of various loadings of carbon nanofibers (CNFs) of polyisoprene elastomer (PR). Conventional method (banbury disperser with open mixing mill) is applied to complete fabrication process of CNF-reinforced elastomeric nanocomposites. Scanning electron micrographs...
The incorporation of functionalized nanoscale fillers into traditional glass fiber/unsaturated polyester (GF/UPE) composites provides a more robust mechanical attributes. The current study demonstrates the potential of 3-mercaptopropyl trimethoxysilane (MPTS)-functionalized carbon black (f-CB) for enhancing the thermo-mechanical properties of GF co...
Novel Polyurethane/Polyvinyl chloride-co-vinyl acetate (PU/PVCA) blend RO membranes were synthesized in four different ratios 90/10, 80/20, 70/30, 60/40. On the basis of appreciable salt rejection, PU/PVCA-4 (60/40) was selected for chemical crosslinking with 1 to 4 wt% of Epichlorohydrin (ECH). The confirmation of physical and chemical crosslinkin...
Novel biodegradable films were prepared by blending guar gum, chitosan and poly (vinyl alcohol) having mint (ME) and grapefruit peel (GE) extracts and crosslinked with nontoxic tetraethoxysilane (TEOS). The co-concentration effect of TEOS with natural extracts on the films was studied. FTIR analysis confirmed the presence of incorporated components...
Inspired by the hydrophilic, biocompatible, adsorbent properties of chitosan. A simple, adaptable, green synthesis method was developed to prepare a thin film composite membranes using chitosan as a pore decorating material for the removal of anionic dye- Reactive orange 16 (RO-16). The hydrophilic chitosan was used to fill up the porous hydrophobi...
In this study, silane activated nanoclay was reinforced in styrene butadiene rubber (SBR) to enhance the thermal resistance/stability and mechanical properties of SBR. silane activated nanoclay with variant concentrations was impregnated in the rubber matrix to fabricate polymer nanocomposites under control processing conditions. Experimental therm...
A simple technique to synthesize and functionalize kaolinite nanoparticles having analogous shape and size in single step using layered silicate microclay as starting material is presented. The morphology, composition, and functionalization study of the activated nanokaolinite were determined by scanning electron microscopy/energy-dispersive spectr...
In order to enhance salt rejection level and high pressure mechanical integrity,functionalized nanokaolin decorated multiwall carbon nanotubes (FNKM, 0–5 wt % loading)were incorporated into a cellulose acetate (CA) matrix using high temperature solutionmixing methodology. Scanning electron microscopy (SEM), X-ray diffraction technique (XRD),thermo-...
Carbon fibers (CFs) are incorporated into ethylene propylene diene monomer (EPDM) rubber to fabricate charring elastomeric ablative composites for ultrahigh temperature applications. Ablation characteristics of the ablative composites were evaluated using ASTM E285-08. Variant content incorporation of short CFs in the basic composite formulation re...
The incorporation of silane treated multiwalled carbon nanotubes (S-MWCNTs) is used as an effective path for tailoring thermomechanical properties of ethylene propylene diene monomer (EPDM). In this study, S-MWCNTs were introduced into EPDM using internal dispersion kneader and two roller mixing mill. By altering the mass ratio of S-MWCNTs from 0 t...
Elastomeric ablative composites for ultrahigh temperature applications were processed and characterized to elucidate the potential of short carbon fibers (SCF) to tailor the thermo-mechanical and ablation characteristics of acrylonitrile butadiene rubber (NBR) composites. SCF was dispersed within NBR using dispersion kneader and two roller mixing m...
Novel membranes were fabricated using weave Kevlar fabric sandwiched between two isotactic polypropylene layers and employing varying quenching temperatures. Thermally induced phase separation (TIPS) dip coating method was adopted to generate the micro-porosity in the composite membranes. SEM and AFM were used to directly observe and confirm the mo...
Variant concentrations of phenol formaldehyde resin were introduced into Acrylonitrile butadiene rubber
(NBR) to investigate the high temperature ablation, thermal and mechanical properties of polymer-polymer
composites. Ablation rates, percent char yields and insulation indexes were reduced, while the thermal
conduction through the fabricated abla...
Novel membranes were fabricated using weave Kevlar fabric sandwiched between two isotactic polypropylene (IPP) layers and employing varying concentrations of IPP while keeping constant concentrations of adipic acid as the nucleating agent as well as other conditions. Thermally induced phase separation (TIPS) dip coating method was adopted to genera...
In order to enhance the thermal insulation/stability and mechanical properties of the styrene butadiene rubber,
four progressive concentrations of activated nanokaolinite were impregnated using conventional dispersion
kneader and two roller mixing mill followed by hot isostatic compression molding to fabricate polymer
nanocomposites. Nanoclay activ...
In this novel research, aluminum silicate fibers were incorporated into ethylene propylene diene monomer
(EPDM) rubber to fabricate ablative composites, achieve better ablation performance, and thermal endurance for ultrahigh temperature applications. Variant concentrations of ceramic fibers (CFs) were impregnated in the elastomeric matrix. Ablatio...
Multiwalled carbon nanotubes (MWCNTs) were modified to covalently attach the carboxylic moiety with their surfaces. Variant concentrations of functionalized multiwalled carbon nanotubes (F-MWCNTs) were introduced into polydimethylsiloxane (PDMS) adopting solution mixing technique. Fourier transform infrared spectroscopy (FTIR) confirms the carboxy...
Pristine multiwalled carbon nanotubes (MWCNTs) along with the silane coupling agent were incorporated into ethylene propylene diene monomer (EPDM) rubber using dispersion kneader and two roller mixing mill to fabricate ablative nanocomposites used in hyperthermal environment encountered by space vehicle or rocket motor. The 1 wt% addition of MWCNTS...
Novel membranes were fabricated with woven Kevlar fabric sandwiched between two isotactic polypropylene layers and with various concentrations of adipic acid as the nucleating agent (NA). A thermally induced phase‐separation dip‐coating method was adopted to generate and control the microporosity in the developed membranes. Scanning electron micros...
Pristine multiwalled carbon nanotubes (MWCNTs) were impregnated in acrylonitrile butadiene rubber (NBR) using internal dispersion kneader and two roller mixing mill to investigate the effects of various nanotubes concentrations on the thermal transport/stability of rubber nanocomposites. Thermal conductivity (λ
N) and thermal impedance (R) measurem...
In order to analyze the effect of multiwalled carbon nanotubes on the thermal transport/stability characteristics of styrene butadiene rubber, five diverse loadings of multiwalled carbon nanotubes were impregnated in the rubber matrix using dispersion kneader and two roller mixing mill. Thermal conductivity and thermal impedance of the nanocomposit...
Variant concentrations of ceramic fibers (CerFs) were incorporated into acrylonitrile butadiene rubber (NBR) to fabricate elastomeric ablative composites for ultrahigh temperature applications. The CerFs introduction into the polymer matrix has enhanced the ablation resistance up to 59% and successfully reduced the backface temperature of the polym...
The dielectric, electric and thermal properties of carboxylic
functionalized multiwalled carbon nanotubes (F-MWCNT) incorporated into
the polydimethylsiloxane (PDMS) were evaluated to determine their
potential in the field of electronic materials. Carboxylic
functionalization of the pristine multi walled carbon tubes (Ps-MWCNT)
was confirmed throug...
To enhance the ablation performance and mechanical strength of silicone rubber (SR), pristine multiwalled carbon nanotubes (MWNTs) were dispersed in the polymer matrix using dispersion kneader and two roller mixing mill. Electrical resistivity (100–300°C) was reduced with increasing filler concentration in the host matrix due to the presence and ev...
Modified nanokaolinite was uniformly dispersed in acrylonitrile butadiene rubber using dispersion kneader and two roller mixing mill. In order to evaluate ablation characteristics of the fabricated composites, high-temperature ablation testing was carried out. The peak incorporation of nanoclay in the rubber matrix has enhanced the ablation resista...
Modified nanokaolinite was uniformly dispersed in acrylonitrile butadiene rubber using dispersion kneader and two roller mixing mill. In order to evaluate ablation characteristics of the fabricated composites, high-temperature ablation testing was carried out. The peak incorporation of nanoclay in the rubber matrix has enhanced the ablation resista...
