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Papers by jayanta maity

Advanced Science, Engineering and Medicine, Nov 1, 2019

Nanoscience and nanotechnology manage the creation, running, and utilization of the materials hav... more Nanoscience and nanotechnology manage the creation, running, and utilization of the materials having the nanoscale measurement. In this audit, for the most part, centers on the green amalgamation of zinc oxide nanoparticles utilizing diverse plants parts (leaf, bloom, natural products, root and stem bark), microscopic organisms, and growth with logical name, family name, regular name and its portrayal, size, and state of the nanoparticles, and different applications. Different significances and utilization of the green incorporated ZnO nanoparticles in the photocatalyst and antibacterial movements were also examined.

Journal of Adhesion Science and Technology, Nov 29, 2018

In this study, fluorine-based methacrylate ester monomers were polymerized on cotton fabric by ad... more In this study, fluorine-based methacrylate ester monomers were polymerized on cotton fabric by admicellar polymerization to make the cotton surface highly rough and also highly hydrophobic with a reliable water contact angle value. The rough micro/ nano-textured surface morphology, after surface fluorination, results in hydrophobicity. The hydrophobic character was confirmed by a simple drop test and contact angle measurements. Surface composition was evaluated by SEM and FT IR analysis to confirm the fluoropolymeric layer adhered on the cotton surface.

Materials Technology, Sep 28, 2018

ABSTRACT We represent a simple, facile in situ hydrothermal technique for the synthesis of ZnO na... more ABSTRACT We represent a simple, facile in situ hydrothermal technique for the synthesis of ZnO nanoparticles and deposition of synthesized nanoparticles on cotton fabric surface in the same reaction media. In our experiment, ZnO nanoparticles and nanoparticles coated cotton fabric used as photocatalyst for photocatalytic degradation of several dyes. ZnO nanoparticles synthesis and surface coating by nanoparticles were carried out using Zinc acetate and FS31 surfactant. The modified cotton fabric was characterized by SEM, EDX and XRD analysis. Hydrophobic and oleophilic modification of cotton were characterized by water and oil drops stay time with contact angle measurement. The photocatalytic degradation properties of nanoparticles and nanoparticles coated cotton fabric were examined in term of photocatalytic elimination of Methylene blue and Methyl orange dye from the contaminated water in presence of sunlight. The results showed that both nanoparticles and ZnO loaded cotton could efficiently decompose MB and MO dyes under sunlight irradiation.

Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, Apr 1, 2008

Conventional composites are generally prepared by adding reinforcing agent to a matrix and the ma... more Conventional composites are generally prepared by adding reinforcing agent to a matrix and the matrix wherein the reinforcing agents are different in chemical composition with the later having superior mechanical properties. This work presents the preparation and properties ...

Polymer Testing, Aug 1, 2008

In this study, the surface of ultra-high-molecular-weight polyethylene (UHMWPE) fiber used as rei... more In this study, the surface of ultra-high-molecular-weight polyethylene (UHMWPE) fiber used as reinforcement in lowdensity polyethylene (LDPE)/UHMWPE fiber composites was modified by direct fluorination using elemental fluorine, (10% F 2 +90% He) mixture, at 25 1C. A polymer composite based on LDPE/UHMWPE fibers was prepared. We studied the influence of surface treatment of the fibers on properties of the composite. The fibers were first used as received, and then were used after fluorine (direct fluorination) treatment of their surface. Stress-strain behavior of the prepared samples was measured. Thermal properties and the trans-crystallization of the matrix over the fibers were observed. The crystallization of the matrix on the fiber surface was followed by scanning electron microscopy and by differential scanning calorimeter (DSC) analysis. The structure of the interface was then observed by X-ray diffraction. Surface energy was determined by contact angle measurement and it indicates that the wetting properties of the fluorinated fiber composites were improved.

Journal of Applied Polymer Science, 2007

Composites Part A-applied Science and Manufacturing, May 1, 2008

An experimental study of the incorporation of non-fluorinated and fluorinated Twaron fibers in po... more An experimental study of the incorporation of non-fluorinated and fluorinated Twaron fibers in polypropylene (PP) is presented. Surface modifications were made to Twaron fiber by direct fluorination technique using elemental fluorine in order to improve the interfacial adhesion between the fiber and matrix. Composites of PP/Twaron fiber (both Fluorinated and non-fluorinated) with 0.6%, 1.25%, 5% and 10% of Twaron fibers

Journal of Composite Materials, Feb 24, 2009

Chemical treatment of synthetic reinforcements can enhance their adhesion to polymer matrices. Th... more Chemical treatment of synthetic reinforcements can enhance their adhesion to polymer matrices. This work reports the effects of different treatments on the fiber—matrix compatibility in terms of surface energy, mechanical, and thermal properties of composites. The PP composites containing 0.625—1.25 wt% of Twaron fibers (non-fluorinated and fluorinated fiber) were prepared by solution casting process. The treatment effects on the fibers and matrix have been characterized by infrared spectroscopy. The tensile properties of the untreated and treated composites were determined as a function of fiber loading. Tensile strength and Young's modulus increased with employment of the compatibilizers due to the better adhesion between the fiber and the matrix. The maximum improvement in the mechanical properties was obtained for the fluorine-treated fiber composites. The interfacial interactions improved the fiber compatibility, mechanical properties of composites. Morphological studies demonstrated that better adhesion between the fiber and the matrix was achieved especially for the fluorine-treated composites containing PP-g-MA as compatibilizers. The dynamic contact angle techniques have been used to determine the surface energy values.

Polymer Composites, 2007

... Correspondence to: C. Jacob; e-mail: cjacob@matsc.iitkgp.ernet.in Contract grant sponsor: Def... more ... Correspondence to: C. Jacob; e-mail: cjacob@matsc.iitkgp.ernet.in Contract grant sponsor: Defence Research and Development Organization (DRDO). ... 7. GS Sheu and SS Shyu, J. Adhes. Sci. Technol., 8, 1027 (1994). 8. JR Brown and Z. Mathys, J. Mater. Sci., 32, 2599 (1997). ...

BioNanoScience, 2017

In this study, we introduce a facile, green, one-pot and eco-friendly method for the synthesis of... more In this study, we introduce a facile, green, one-pot and eco-friendly method for the synthesis of silver and gold nanoparticles using microwave-assisted strategy. The aqueous leaf extract of a medicinal plant Myxopyrum serratulum A. W. Hill was used as both stabilizing and reducing agents for this preparation. The synthesized nanoparticles were characterized by using UV-vis spectroscopy, FTIR spectroscopy and XRD, TEM and EDAX analyses. The silver and gold nanoparticles respectively show SPR band at 441 and 539 nm in UV-vis spectrum. The involvement of phytochemicals in the reduction and stabilization of nanoparticles was confirmed by FTIR spectroscopy. The crystalline fcc structure of nanoparticles was assured from XRD analysis. The size and morphology of nanoparticles were obtained from the TEM images. The presences of silver and gold elements were confirmed from their respective EDAX spectrum. The antimicrobial effects of leaf extract and synthesized silver and gold nanoparticles were tested against both bacterial and fungal strains by employing agar well diffusion method. The nanoparticles show high antimicrobial properties. The antioxidant properties were studied by simple DPPH assay. The nanoparticles exhibited better DPPH scavenging activities compared to leaf extract. In addition, it has been shown that the synthesized silver and gold nanoparticles functioned as an effective catalyst for the reduction dyes viz. 4- nitrophenol, methylene blue and Congo red by sodium borohydride.

Applied Surface Science, 2017

A durable fluorine-free polyethersulfone (PES) superhydrophobic composite coating with excellent ... more A durable fluorine-free polyethersulfone (PES) superhydrophobic composite coating with excellent wear-resistant and anti-corrosion properties has been successfully fabricated by combining sol-gel and spray technology. The robust micro/nano-structures of the prepared surface were established by introducing binary montmorillonite-silica (MMT-SiO 2) assembled composite particles, which were formed by in-situ growth of SiO 2 on MMT surfaces via sol-gel. Combined with the low surface energy of amino silicon oil (APDMS), the fluorine-free superhydrophoic PES coating was obtained with high water contact angle 156.1±1.1° and low sliding angle 4.8±0.7°. The anti-wear of the final PES/APDMS/MMT-SiO 2 superhydrophobic coating can reach up to 60100 cycles, which is outdistancing the pure PES coating (6800 cycles) and the PES/MMT/SiO 2 coating prepared by simple physical mixture

Defence Science Journal, May 19, 2014

IntroductIon Aromatic polyamides were first introduced in a commercial application in the early 1... more IntroductIon Aromatic polyamides were first introduced in a commercial application in the early 1960s, with the metaaramid fiber, Nomex, by DuPont. This fiber is a highly heat resistant material still used in thermal and electrical insulation and also produced by Teijin under the trade name, Teijinconex, and in Europe by Kermel under the trade name Kermel since the early 1970s. Based on earlier research by Monsanto and Bayer, a fiber with much higher tenacity and elastic modulus was developed also in the 1960s-1970s by DuPont and AKZO Nobel, both profiting from their knowledge of rayon, polyester and nylon processing. Much work was done by Stephanie Kwolek in 1961 while working at DuPont and that company was the first to introduce a para-aramid called Kevlar in 1973. A similar fiber called Twaron with roughly the same chemical structure was introduced by AKZO in 1978. Twaron is currently owned by the Teijin company. Aramids share a high degree of orientation with other fibers such as ultra high molecular weight polyethylene (UHMWPE) fiber. Para-aramid fibers such as Kevlar and Twaron, provide outstanding properties such as high Young's modulus, low creep etc. They are used in many high technology applications 1,2 , such as aerospace and military applications, for bullet-proof body armor fabric, ropes, cables, composite material 2-4 , sporting goods and as an asbestos substitute. According to the Federal Trade Commission, the definition of aramid fiber is: 'A manufactured fiber in which the fiber-forming substance is a long-chain synthetic polyamide in which at least 85% of the amide linkages, (-CONH-) are attached directly to two aromatic rings'. Poly-p-phenylene terephthalamide is a product of p-phenylene diamine and terephtaloyl dichloride. World capacity of para-aramid

Separation and Purification Technology, 2009

The mixture of inorganic salt LiCl and soluble polymer polyethylene glycol (PEG) 1500 as non-solv... more The mixture of inorganic salt LiCl and soluble polymer polyethylene glycol (PEG) 1500 as non-solvent additive was introduced to fabricate hydrophobic hollow fiber membrane of polyvinylidene fluoride (PVDF) by phase inversion process, using N,N-dimethylacetamide (DMAc) as solvent and tap water as the coagulation medium. Compared with other three membranes from PVDF/DMAc, PVDF/DMAc/LiCl and PVDF/DMAc/PEG 1500 dope solution, it can be observed obviously by scanning electron microscope (SEM) that the membrane spun from PVDF/DMAc/LiCl/PEG 1500 dope had longer finger-like cavities, ultra-thin skins, narrow pore size distribution and porous network sponge-like structure owing to the synergistic effect of LiCl and PEG 1500. Besides, the membrane also exhibited high porosity and good hydrophobicity. During the desalination process of 3.5 wt% sodium chloride solution through direct contact membrane distillation (DCMD), the permeate flux achieved 40.5 kg/m 2 h and the rejection of NaCl maintained 99.99% with the feed solution at 81.8 • C and the cold distillate water at 20.0 • C, this performance is comparable or even higher than most of the previous reports. Furthermore, a 200 h continuously desalination experiment showed that the membrane had stable permeate flux and solute rejection, indicating that the as-spun PVDF hollow fiber membrane may be of great potential to be utilized in the DCMD process.

Desalination and Water Treatment, 2014

ZnO nanoparticles were manufactured using microwave-assisted combustion. The structural and morph... more ZnO nanoparticles were manufactured using microwave-assisted combustion. The structural and morphological properties of the nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. Photocatalytic degradation of ortho-nitrophenol (O-NP) in aqueous solution using the synthesized nanoparticles was performed under UV-C irradiation and is reported for the first time. The effect of the initial O-NP concentration, amount of photocatalyst, pH, and salt was investigated during photodegradation. Analysis of the degraded samples using HPLC with UV detection revealed that photocatalysis in the presence of ZnO nanoparticles removed 98% of the O-NP in 5 h. In addition, the photocatalytic degradation kinetics of O-NP were studied, and the results suggest that the data are best fitted to pseudo-first-order kinetic and Langmuir-Hinshelwood models.

Materials Today: Proceedings

Polymer and Textile Research Laboratory, Department of Chemistry, Sidho-Kanho-Birsha University,&... more Polymer and Textile Research Laboratory, Department of Chemistry, Sidho-Kanho-Birsha University, Purulia-723 104, West Bengal, India Department of Zoology, Lady Brabourne College, Suhrawardy Avenue, Beniapukur, Kolkata-700 017, India *E-mail: jayantajune@gmail.com Manuscript received online 01 December 2020, accepted 20 December 2020 Non-wettability is a renowned avenue for designing a vast array of smart and advanced materials. In this context, water-repellent surfaces have been prepared. Thin polymer coatings were successfully fabricated on silk surfaces through the admicellar polymerization technique by using fluoro-surfactant and 1H,1H,2H,2H-perfluorodecyl acrylate (PFDA monomer) system and potassium persulfate (K2S2O8) as an initiator. The water-repellent properties induced to the treated surface were examined by analyzing the halt...

Journal of fashion technology & textile engineering, Aug 10, 2021

Journal of the Indian Chemical Society, 2021

In the present study, cost effective and environment friendly silver nanoparticles were synthesiz... more In the present study, cost effective and environment friendly silver nanoparticles were synthesized using Moringa Oleifera leaves extract as the reducing and capping agent. The nanoparticles (AgNPs) were characterized using UV-visble, FT-IR, XRD, and Scanning electron microscopy (SEM) analysis. The surface plasmon resonance peaks in absorption spectra for silver colloidal solution showed an absorption peak at 443 nm in a UV-visible spectrum. From the XRD data, we suggest the occurrence of cubic shaped particles due to the presence of silver. Further, the application of prepared nanoparticles to photocatalytic degradation of Methylene blue dye was measured spectrophotometrically. The results exposed that our synthesized green silver nanoparticles using Moringa Oleifera leaf extract were found to be remarkable in degrading the Methylene blue dye. Keywords: Green synthesis; Ag nanoparticles; Photocatalytic degradation