Ajit Banthia

Ajit Banthia

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180
Publications
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4,710
Citations
Citations since 2017
1 Research Item
1859 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Introduction
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Publications

Publications (180)
Research
Full-text available
Polycondensations (condensation polymerization) are stepwise reactions between bifunctional or polyfunctional compoents, with elimination of simple molecules such as water or alcohol and the formation of macromolecular substances. Polyborate ester , formed by this process, gives ceramic materials during pyrolysis. Polymer pyrolysis offers an attrac...
Article
Full-text available
Graft copolymerization of vinyl acetate (VAc) on pectin was performed using a redox initiator ceric ammonium nitrate (CAN). The grafting conditions were optimized by studying the effect of monomer, vinyl acetate (VAc) and initiator (CAN) concentrations as well as temperature and time. These variables appreciably affected the percentage of grafting...
Article
This investigation reports preparation of poly(2-hydroxy ethyl methacrylate) (PHEMA) microspheres containing metronidazole, antiprotozoal drug via a suspension polymerization. The PHEMA microspheres were characterized by scanning electron microscopy (SEM), UV-Visible spectroscopy, and fourier transform infrared (FT-IR) spectroscopy. Swelling behavi...
Article
Roughness on pristine and aged or polymer composite surfaces is of enormous practical importance for polymer applications. This study is about the comparison of the response of a red mud based composite material to an oscillatory deformation (here in tension-torsion mode) as a function of temperature. This study deals with the use of varying quanti...
Article
Full-text available
This work reports the synthesis and characterization of modified pectin based polymer electrolyte membranes crossilnked with glutaraldehyde (GA). The prepared diethanolamine modified pectin (DAP) membranes were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), methanol permeability and impedance spec...
Article
Full-text available
Pectin is known as a miracle polymer of natural origin because of its excellent biodegradable and biocompatible nature. Pectin is commercially extracted from different citrus products like apple, pomace, and oranges under mildly acidic conditions. Pectin has been mainly divided in to major group's namely high methoxyl pectin and low methoxyl pectin...
Article
Hybrid proton conducting membranes of poly(vinyl alcohol) (PVA) and phosphomolybdic acid (PMA) were prepared by solution casting method. The effect of PMA doping and PVA crosslinking density on the membrane properties and proton conductivity were investigated. The crosslinking reaction between the hydroxyl group of PVA and the aldehyde group of glu...
Article
Full-text available
The work presents the synthesis and characterization of amidated pectin (AP) based polymer electrolyte membranes (PEM) crosslinked with glutaraldehyde (GA). The prepared membranes are characterized by Fourier transform infrared spectroscopy (FTIR), organic elemental analysis, X-ray diffraction studies (XRD), thermogravimetric analysis (TGA) and imp...
Article
Full-text available
Purpose – The purpose of this paper is to find a new curing agent for diglycidyl ether of bisphenol A (DGEBA) resin and to check effectiveness of this new curing agent to obtain toughness and chemical resistance of cured epoxy. Design/methodology/approach – For this purpose, an investigation was carried out to synthesise, characterise and to study...
Article
A series of novel cross-linked Poly (vinyl alcohol-co-vinyl acetate-co-itaconic acid) (PVACO) and silicotungstic acid (STA) based organic-inorganic composite membranes have been prepared and characterized for direct methanol fuel cell (DMFC) applications. The characteristic properties of these crosslinked composite membranes were investigated by Fo...
Article
A study of Polymer Modified Wood Dust Nanocomposite (PMW) was done using a polymer matrix of poly (vinyl alcohol) (PVA) and Modified Wood Dust as reinforcing agent. Composite materials were prepared by effectively dispersing the wood dust within the PVA matrix via a conventional solvent casting technique. The obtained PMW materials were typically c...
Article
Full-text available
A pH sensitive hydrogel was developed by freeze thaw method based on chitosan and Poly (vinyl alcohol)-co-(vinyl acetate)-co-(itaconic acid) (PVACO). The hydrogel membranes were characterized by FTIR (Fourier transform infrared) spectroscopy, X ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The mech...
Article
Full-text available
Red mud emerges as the major waste material during production of alumina from bauxite by the Bayer’s process. Based on economics as well as environmental related issues, enormous efforts have been directed worldwide towards red mud management issues i.e. of utilization, storage and disposal. The present research work has been undertaken with an obj...
Article
Full-text available
The present work deals with the development of pectin-gelatin (PEGE) hydrogel membranes for wound dressing applications. The prepared hydrogels were characterized by FTIR spectroscopy, XRD spectroscopy, water vapor transmission rate (WVTR) test and tensile strength test. Morphology and thermal stability of the membranes were analyzed by Field emiss...
Article
The objective of this paper was fulfilled by developing a lightweight, high strength and low cost composite. For a low cost housing project, 5 layer jute fiber composites were prepared. Here jute fibers were treated with a coupling agent 2-hydroxyethyl acrylate (HEA). This composite offer the unique potential of combining natural fibers with resins...
Article
Wood dust was modified by maleic anhydride and to know the effect of various filler loading on the properties of PVA-modified wood dust composite prepared by a conventional solvent casting technique. The as-synthesized composite films were typically characterized by FTIR spectroscopy and X-ray diffraction. To study the temperature dependencies of t...
Article
This study dealt with the use of various quantities of modified red mud as a nanofiller in a poly(hydroxy ether) of bisphenol A (Phe) based matrix. Phe-based polymer nanocomposites reinforced with acidically and organically modified layered red mud were prepared by a conventional solvent-casting technique. The best dispersion occurred in the polyme...
Article
Full-text available
The study describes iontophoretic release of Salicylic acid and Potassium Salt of Acetyl Salicylic acid which is commonly known as the analgesic and thromboxane prostaglandins inhibitor, Disprin, from hydrogel patches based on Poly(vinyl alcohol), Poly (vinyl acetate–co–crotonic acid) & Poly (vinyl pyrrolidone). The experiment utilized a modified F...
Article
Full-text available
This paper reports the development of pectin/PVP/glycine based hydrogel membranes for biomedical applications. The membranes were prepared by conventional solution casting method. The prepared hydrogel membranes were characterized by, Fourier transform infrared spectroscopy (FTIR), X ray diffraction (XRD), Thermogravimetric analysis (TGA) and scann...
Article
Full-text available
This work reports the development and characterization of chitosan/ phosphomolybdic acid-based composite membranes. The prepared composite membranes were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), tensile strength test, and thermogravimetric analysis (TGA). FTIR...
Article
Full-text available
The aim of the present study was to develop biosynthetic hybrid polymer-based ocular insert for topical administration of antibiotics for treatment of ocular infections. Ciprofloxacin hydrochloride-loaded three different inserts were prepared by solution casting method by esterification of a biopolymer (gelatin) with a synthetic polymer (polyvinyl...
Article
Full-text available
This work reports the development and characterization of chitosan/Phosphomolybdic acid (PMA) based composite membranes. The prepared composite membranes were characterized by FTIR (Fourier transform infrared) spectroscopy, X ray diffraction (XRD), differential scanning calorimetry (DSC), tensile strength test, and thermogravimetric analysis (TGA)....
Article
The current study deals with the development of a glutaraldehyde cross-linked chitosan-based delivery system with improved mechanical properties utilizing the reactive solvent technique. The prepared systems were characterized by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), thermo-gravimetric analysis (TGA) and differen...
Article
Full-text available
Hydrogel wound dressing can protect injured skin and keep the woundsurface appropriately moist to speed the healing process by absorbingexudates while maintaining the products of tissue repair, including growthfactor and lysosomes, in contact with the wound. The design anddevelopment of novel membrane of hydrogel prepared by crosslinking ofpolyviny...
Article
The E glass woven fabrics have been used as a reinforcing agent with amine terminated poly(ethylene glycol) benzoate (ATPEGB) modified epoxy as a matrix, for the preparation of fiber reinforced plastic (FRP) composites. The composite materials so obtained were subjected to dynamic mechanical analysis at a fixed frequency of 1 Hz. The volume fractio...
Article
Purpose The purpose of this paper is to report the preparation and characterisation of nanocomposites, which are made of biodegradable poly(vinyl‐alcohol‐co‐ethylene) and wood dust. These nanocomposites can aptly be termed as green by nature as they are totally non‐toxic and ecofriendly. Design/methodology/approach Sample films containing 5, 10 an...
Article
Full-text available
The work presents the synthesis and characterization of amidated pectin (AP) based polymer electrolyte membranes (PEM) crosslinked with glutaraldehyde (GA). The prepared membranes are characterized by Fourier transform infrared spectroscopy (FTIR), organic elemental analysis, X-ray diffraction studies (XRD), thermogravimetric analysis (TGA) and imp...
Article
Full-text available
Purpose The purpose of this paper is to evaluate the improvement of mechanical and thermal properties of cured epoxy modified with amine functional chloroaniline formaldehyde condensate (AFCFC) and to determine the optimum level of modification. Design/methodology/approach To evaluate toughening, different compositions were made by adding various...
Article
Full-text available
Hydrogels are cross-linked polymeric networks, which have the ability to hold water within the spaces available among the polymeric chains. The hydrogels have been used extensively in various biomedical applications, e.g., drug delivery, cell carriers and/or entrapment, wound management and tissue engineering. Though far from extensive, this articl...
Article
Full-text available
The research presented in this paper discusses the potential of iontophoresis facilitated transdermal delivery of glycine. Iontophoresis has been widely investigated as a noninvasive transdermal drug delivery system. Iontophoresis is the use of a low electric current to carry ionized as well as unionized drug molecules across tissues (like skin) in...
Article
Full-text available
An investigation was carried out to modify the fracture toughness of cured diglycidyl ether of bisphenol-A (DGEBA) resin networks with amine functional chloroaniline acetaldehyde condensate (AFCAC) as toughening agent. The resulting networks displayed significantly improved fracture toughness. The AFCAC was synthesized by the condensation reaction...
Article
Chemically cross-linked composite membranes consisting of poly(vinyl alcohol) (PVA) and silicotungstic acid (STA) have been prepared by solution casting and evaluated as proton-conducting polymer electrolytes. The proton conductivity of the membranes was investigated as a function of blending composition, cross-linking density, and temperature. The...
Article
The synthesis of epoxidized soybean oil acrylate (ESOA) from epoxidized soybean oil (ESO) had been carried out by reacting acrylic acid with the oxirane group in ESO. The acrylated ESO products were characterized using a variety of analytical techniques. The oxygen value, iodine value, and acid value were obtained to know the amount of unsaturation...
Article
Polymer nanocomposites reinforced by relatively small amounts of ultra fine, nano-filler particles (red mud platelets) proved promising materials with improved properties. The composite materials of Poly (vinyl alcohol) with organo-red mud were prepared via conventional solvent casting technique. To know the effect of various filler loading on the...
Article
Full-text available
In the present study an attempt was made to graft polyacrylamide on pectin. The grafted polymer was characterized by FTIR spectroscopy, differential scanning calorimetry and X-ray diffraction. Rheological property of pectin solution was compared with the product solution. The grafted polymer was cross-linked with varying amount of glutaraldehyde. T...
Article
Full-text available
In the current studies attempts were made to prepare hydrogels by chemical modification of pectin with ethanolamine (EA) in different proportions. Chemically modified pectin products were crosslinked with glutaraldehyde reagent for preparing hydrogels. The hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), organic eleme...
Article
Porous hydrophobic polyurethane urea (PUU) membrane was prepared for pervaporation separation of phenol and two chlorophenols namely p-chlorophenol (PCP) and 2,4-dichlorophenol (DCP). Polyurethane urea was synthesized by reacting hydroxy terminated polybutadiene (HTPB) with 2,4-toluene diisocyanate (TDI) using oxydianiline (ODA) as chain extender....
Article
Polymer electrolyte membrane fuel cells (PEMFCs) are very promising as future energy source due to their high-energy conversion efficiency and will help to solve the environmental concerns of energy production. Polymer electrolyte membrane (PEM) is recognised as the key element for an efficient PEMFC. Chemically crosslinked composite membranes cons...
Article
An investigation was carried out to modify the toughness of triethylene tetramine cured DGEBA (diglycidyl ether of bisphenol-A) resin using solid amine terminated poly (ethylene glycol) benzoate (ATPEGB) as modifier with and without red mud waste particles. The solid ATPEGB modifier synthesized from the acid catalyzed esterification reaction of pol...
Article
A study of polymer-acid-modified Red mud composite (PRC) was done using a polymer matrix of poly (vinyl alcohol) (PVA) and layered Red mud as reinforcing agent. Composite materials were prepared by effectively dispersing the PVA matrix into the inorganic layered modified Red mud via a conventional solvent-casting technique. The PRC materials, as sy...
Article
Full-text available
The purpose of the present study was to develop and design pectin and polyvinyl pyrrolidone (PVP) blended hydrogel membranes (PEVP), with different pectin: PVP ratios (1:0.2, 1:0.4, 1:0.6, 1:0.8 and 1:1 w/w), which were prepared by using a conventional solution casting technique. An attempt has been made to characterize the hydrogel membranes by va...
Article
Full-text available
Development of hydrogels prepared by crosslinking of corn starch and polyvinyl alcohol with glutaraldehyde was attempted. The membranes were characterized by FTIR spectroscopy and XRD. The mechanical properties of the hydrogels were characterized by tensile tests. Diffusion studies of salicylic acid and gatifloxacin through the membranes were also...
Article
Full-text available
Purpose The purpose of this paper is to evaluate the mechanical properties of glass fibre reinforced epoxy composites modified with amine‐terminated poly (ethylene glycol) benzoate (ATPEGB) along with their thermal stability. Design/methodology/approach ATPEGB prepared from poly (ethylene glycol) (PEG) of different molecular weights (200, 400, 600...
Article
Purpose The purpose of this paper is to synthesise, characterise and study polymerisation kinetics of novel 4‐nonylphenylmethacrylate (NPMA) polymer. Design/methodology/approach New methacrylic monomer, 4‐NPMA with a pendant nonylphenyl group was synthesised and characterised using various characterisation techniques. The free radical polymerisati...
Article
Full-text available
The diffusion of salicylic acid, a model drug, loaded in prepared corn starch paste was studied through cellulose acetate membrane and extracted mouse skin by the application of iontophoresis. Current was applied from a custom designed current delivery circuit. The in-vitro experiments were conducted using modified Franz diffusion cell with stainle...
Article
BisGMA (Bisphenol-A-glycidyldimethacrylate) resin had been modified by incorporating TiO2 nanoparticles (0.5–2% by weight). An ultrasonic mixing process was used to disperse the particles into the resin system prior to casting and curing test specimens. TEM investigation showed that the particles were nano size (5–60 nm) and dispersed throughout th...
Article
Purpose To synthesise and characterise homo and copolymer of 4‐nonylphenyl methacrylate (NPMA) and styrene and to determine monomer reactivity ratios by the application of conventional linearisation methods such as Finemann‐Ross (F‐R) and Kelen‐Tudos (K‐T) methods. Design/methodology/approach New methacrylic monomer, NPMA with a pendant nonylpheny...
Article
Full-text available
In the present study, an attempt has been made to modify pectin by grafting polyacrylamide using ammonium ceric sulphate as initiator. The effect of various variables like initiator concentration, monomer concentration, temperature and time has been studied. The grafted copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR),...
Article
Full-text available
separation factors of 1.9-16.2 and fluxes of 4.26-38.48 kg/m2 h and PVACA membrane showed separation factors of 3.8-33 and fluxes of 2.17-480.8 kg/m2 h for acetic acid-water separation. In case of ethanol-water separation, the PVAMA membrane showed separation factors of 0.7-17.9 and fluxes of 2.5-36.2 kg/m2 h and PVACA membrane showed separation fa...
Article
Full-text available
The diglycidyl ether of bisphenol-A (DGEBA) resin was modified with amine functional aniline acetaldehyde condensate (AFAAC) and cured with an ambient temperature curing agent triethylene tetramine. The resulting networks displayed significantly improved fracture toughness. The AFAAC was synthesized by the condensation reaction of aniline and aceta...
Article
The wound is a biosynthetic environment in which numerous cellular processes are interlinked in the process of repair. Modern dressings are designed to facilitate wound healing rather than just to cover it. Hydrogel dressing can protect injured skin and keep it appropriately moist to speed the healing process by absorbing exudates while maintaining...
Article
Purpose This paper seeks to prepare and characterise vinyl ester (bisphenol‐A‐glycidyldimethacrylate (BisGMA)) prepolymer via a new synthetic route by the esterification of methacrylic acid and epoxy resin Design/methodology/approach BisGMA prepolymer was synthesised from methacrylic acid and diglycidyl ether of bisphenol‐A (BPA) type epoxy resin....
Article
As part of an ongoing research on biodegradable composites, which can be aptly termed as green composites, the present article reports on the incorporation of wood industry waste material, wood dust, as organic filler in film matrix based on Poly(Vinyl Alcohol) as continuous phase. In this study as filler, dust of Piyasal wood was used. In order to...
Article
The work presents the electrical and dielectric characterization of proton-conducting, chemically-crosslinked nanocomposites of polyvinyl alcohol (PVA) and phosphotungstic acid (PTA). The composite membranes were prepared by in situ crosslinking of the polymer matrix in solution form, containing PTA. The electrical and dielectric properties of the...
Article
Full-text available
To cure diglycidyl ether of bisphenol A (DGEBA) resin, with new curing agents like amine functional aniline formaldehyde condensates (AFAFC) and amine functional chloroaniline formaldehyde condensates (AFCFC) as a function of concentration of the curing agents, an investigation was carried out. The AFAFC and AFCFC were synthesized from the reaction...
Article
Full-text available
The design and development of pectin-based hydrogels were attempted through the chemical modification of pectin with diethanolamine (DA). Diethanolamine modified pectin (DAMP) was synthesized by the chemical modification of pectin with varying concentrations of DA (1:1,1:2,1:3 and 1:4) at 5 oC in methanol. The modified product was used for the prep...
Article
Calorimetric experiments at cooling rates comparable to those during injection molding, as an example, are needed to study phase transitions under conditions relevant for processing. Ultra fast scanning calorimetry is a technique which provides a means to analyze the materials of interest under rapid cooling conditions and it is a promising techniq...
Article
Full-text available
Composites of ultra high molecular weight polyethylene (UHMWPE) reinforced with 5, 10 and 15 percent of alumina were prepared by a technique of uniform mixing and moulding. Acetabular cups were produced by compression moulding methods. A new walk simulator was also developed in-house for testing the tribological performances of these cups. The resu...
Article
Full-text available
The purpose of this research was to design and develop hydrogels by esterification of polyvinyl alcohol (PVA) with gelatin. The membranes were characterized by Fourier Transform Infrared (FTIR) spectroscopy, x-ray diffraction (XRD), and differential scanning calorimetry. The viscosity of the esterified product (as solution) was compared with the mi...
Article
Full-text available
Purpose In order to study its cure response and to understand its kinetic behaviour, this paper seeks to examine how a multifunctional epoxy resin, N,4‐bis(4‐(bis(2‐oxiranylmethyl)amino)‐2‐chlorobenzyl)‐3‐chloro‐N‐(2‐oxiranylmethyl)benzenamine (BCCOMB), synthesised from amine functional chloroaniline formaldehyde condensate (AFCFC) and epichlorohyd...
Article
Full-text available
A series of polymer–acid-modified red mud composite (PRM) materials that consist of poly(vinyl alcohol) (PVA) and layered Red mud (RM) are prepared by effectively dispersing organic PVA matrix into the inorganic layers of modified RM via a conventional solvent casting technique. The as-synthesized PRM materials are typically characterized by Fourie...
Article
The antibacterial activities of side chain dendritic polyesterurethane (SCDPEU) as well as its silver doped structures were studied against Escherichia Coli bacteria. The results showed that the silver doped structures attain high anti-bacterial activity. Formation of silver doped side chain dendritic polymers was investigated from the UV-vis plasm...
Article
Reactive acrylate rubbers with the terminal and pendent carboxyl groups have been investigated as a modifier for a room temperature curing epoxy resin. The liquid rubbers with varying molecular weights and carboxyl-functionality were synthesized by bulk polymerization of 2-ethyl hexyl acrylate using acrylic acid as a comonomer. The liquid rubbers w...
Chapter
The electrical conductivity studies of chemically crosslinked nano composite membranes consisting of poly (vinyl alcohol) (PVA) and phosphomolybdic acid (PMA) with different blending composition and crosslinking density has been conducted over a wide frequency regime. The conductivity of the systems has been studied within the temperature range 25...
Article
Full-text available
Red mud was organophilized by aniline formaldehyde and to know the effect of various filler loading on the properties of PVA-Organophilized red mud composite prepared by a conventional solvent casting technique and comparison of the same with that of the virgin polymer, various characterizations was done. The as-synthesized composite films were typ...
Article
Vinyl ester BisGMA [Bisphenol-A-glycidyldimethacrylate] resin has been modified by incorporating Titanium dioxide(TiO2)nanoparticles (0.5%-2% by weight). An ultrasonic mixing process was employed to disperse the particles into the resin system prior to casting and curing test specimens. From TEM investigation, it is found that the particles are nan...
Article
Polycondensations (condensation polymerization) are stepwise reactions between bifunctional or polyfunctional compoents, with elimination of simple molecules such as water or alcohol and the formation of macromolecular substances. Polyborate ester, formed by this process, gives ceramic materials during pyrolysis. Polymer pyrolysis offers an attract...
Article
Nitrides remain a relatively unexplored class of materials primarily due to the difficulties associated with their synthesis and characterization. Several synthetic routes, including high temperature reactions, microwave assisted synthesis, and the use of plasmas, to prepare binary and ternary nitrides have been explored. Transition metal nitrides...
Article
Full-text available
Composites of Ultra High Molecular Weight Polyethylene (UHMWPE) and High Density Polyethylene (HDPE) reinforced with 10,15 and 20 percent of carbon fiber were prepared by a technique of uniform mixing and moulding. Acetabular cups were produced by compression moulding methods. A new walk simulator was also developed in-house for testing the tribolo...
Article
Poly(viny alcohol)–poly(vinyl pyrrolidone) biodegradable polymer blend was modified with aluminosilicate. Sample films containing 5, 10, 15, and 20 wt % filler were prepared by conventional solvent casting technique using glass plates as casting surfaces. The newly developed biodegradable composites are bright red, with magnetic properties due to t...
Article
Novel pH-sensitive hydrogels for drug delivery applications were developed in our laboratory. The hydrogels were made by esterification of sodium carboxymethyl cellulose with acryloyl chloride or methacryloyl chloride. Fourier transform infrared (FTIR) spectra of the hydrogels suggested formation of ester bonds between the hydroxyl groups of sodium...
Article
Flexible epoxy matrices, having a good vibration damping capability, were nanoreinforced using an organoclay. The nanocomposites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis. The effect of matrix flexibility on the reinforcing effect was investigated. It was found that the reinforcing effect incr...
Article
Purpose To prepare and characterise vinyl ester (Bisphenol‐A‐glycidyldimethacrylate (BisGMA)) prepolymer via a new synthetic route involving the esterification of methacrylic acid and epoxy resin. Design/methodology/approach BisGMA prepolymer was synthesised from methacrylic acid and diglycidyl ether of bisphenol‐A‐type epoxy resin. The compound s...
Article
Polymer membranes are potentially selective for separation of organic compounds from a mixture by pervaporation. A novel crosslinked hydroxyterminated polybutadiene based (HTPB) polyurethane urea (PUU)–poly (methyl methacrylate) (PMMA) interpenetrating network (IPN) membrane has been developed for the selective removal of chlorinated volatile organ...
Article
Interpenetrating network (IPN) membrane of HTPB-based polyurethane urea (PUU) and poly (methyl methacrylate) (PMMA) was developed and used in the pervaporation separation of water-dimethyl formamide (DMF) mixtures of different compositions. From these data the permeation flux, separation selectivity, degree of swelling were calculated at 25, 40 and...