A5054439080- Polymer Nanocomposite Synthesis and Irradiation
- Polymer Nanocomposites and Properties
- biodegradable polymer synthesis and properties
- Hydrogels: synthesis, properties, applications
- Adsorption and biosorption for pollutant removal
- Electrospun Nanofibers in Biomedical Applications
- Recycling and Waste Management Techniques
- Nanocomposite Films for Food Packaging
- Polymer crystallization and properties
- Extraction and Separation Processes
- Plant-Derived Bioactive Compounds
- Nanomaterials for catalytic reactions
- Water Quality Monitoring and Analysis
- Lignin and Wood Chemistry
- Analytical chemistry methods development
- Advanced Sensor and Energy Harvesting Materials
- Natural Fiber Reinforced Composites
- Dyeing and Modifying Textile Fibers
- Chemical Synthesis and Characterization
- Bone Tissue Engineering Materials
- Polymer composites and self-healing
- Tribology and Wear Analysis
- Radiation Effects and Dosimetry
- Advanced Polymer Synthesis and Characterization
- Heavy metals in environment
Bangladesh Atomic Energy Commission
2012-2024
Institute for Nuclear Science and Technology
2019
University of Rajshahi
1992
In Bangladesh, use of beauty cream is very much popular and a common daily task for the people. The current study focusing on assessment some toxic heavy metals such as lead, cadmium, chromium, mercury contamination in creams commonly used by Bangladeshi results indicate that concentrations chromium exceed maximum allowable concentrations, whereas found below acceptable limit set WHO/EU. However, according to Health Canada, cadmium all selected samples (except sample coded A) was within...
Several kinds of acrylic-acid-grafted-starch (starch/AAc) hydrogels were prepared at room temperature (27°C) by applying 5, 10, 15, 20, and 25 kGy gamma radiation to 15% AAc aqueous solutions containing 7.5, starch. With increment the dose, gel fraction became higher attained maximum (96.5%) 15 kGy, above which got lowered. On other hand, monotonically increased with starch content. Swelling ratios lower for starch/AAc gamma-ray doses so larger contents. Significant promotions swelling...
Chitosan acts as an elicitor in many plant species. It not only activates the immune system of plants, but also increases crop yields. A study was planned to investigate effect foliar application chitosan on morphological, growth and reproductive characters its consequence fruit yield summer tomato. The experiment comprised five levels concentrations viz., 0 (control), 25, 50, 75 100 mg L-1. sprayed two times, 25 35 days after transplanting. Foliar at early stages increased height, number...
Abstract Environmental pollution due to heavy metal contamination is a major environmental concern. A fully biodegradable and reusable adsorbent hydrogel for removal of ions has been developed. The was prepared from acrylic acid chitosan using an irradiation method. characterized Fourier transform infrared analysis. Uptake copper(II) lead(II) at different contact times, pH, ion concentrations investigated by batch method atomic absorption spectroscopy. Kinetic adsorption data were studied...
A breakthrough in superabsorbent hydrogel (SAH) preparation was studied the current issue by blending potato starch and acrylic acid for wastewater treatment. Gamma irradiation source (60Co irradiation) used to irradiate SAH from 1 10 kGy dose at room temperature (~27°C). The swelling ratio, water absorption, equilibrium content, gel fraction properties of were investigated. as-prepared treated with KOH (THG) showed excellent absorption capacity but less mechanical stability compared...
The objective of the work is to synthesize pectin-N, N-Dimethylacrylamide (DMAA) hydrogel by gamma radiation without using any initiators and cross-linking agents. Effect doses on gel fraction equilibrium swelling as a function pH were studied, 5 kGy dose was found be optimum for synthesis. grafting /crosslinking investigated Fourier transform infrared spectroscopy. Thermal properties surface morphology studied differential scanning calorimetry electron microscopy. To study drug release...
Abstract Hydrogel is prepared from a poly(vinyl pyrrolidone) (PVP) and alcohol) (PVA) blend solution by gamma radiation with 60Co λ source at room temperature. Properties of the hydrogel, such as gel fraction, strength swelling ratio, equilibrium water content, absorption in temperature, were investigated. Blending hydrogel PVP PVA obviously increased decreased ratio hydrogel. It was observed that fraction while content dose, but up to certain dose then decreased. The percentage temperature...
The effect of transition metals as a promoter physico-mechanical properties radiation-vulcanized natural rubber latex (RVNRL) films was investigated. RVNRL were prepared by the addition (Fe, Mn, etc.) different concentrations (0–30 ppm) in (NR) and irradiated with various radiation doses (0–20 kGy). metal ions optimized found to be 20 ppm 12 kGy, respectively. Tensile strength, tear cross-linking density increased increasing concentration well doses. mechanical enhanced approximately 20% at...
The amidoxime adsorbent was prepared by radiation grafting of acrylonitrile on non-woven polyethylene followed chemical treatment with hydroxyl amine hydrochloride. used for adsorption methyl orange (MO) from aqueous solution. effect different conditions such as contact time, pH and initial metal ion concentration the capacity investigated. Pseudo-first-order pseudo-second-order equations were to study kinetic data. A Langmuir isotherm model investigate equilibrium experimental monolayer...
Synthesis of copolymer hydrogels from aqueous solution acrylamide/2-hydroxyethyl methacrylate (HEMA) has been performed with radiation processing technology using Co-60 gamma source. The influence dose and concentration HEMA on gel content, swelling properties thermal stability hydrogel investigated. Gel content prepared obtained maximum at the 30 kGy. Swelling ratio equilibrium water decrease increased in feed solution. absorption increases standing time medium. It is fast up to 24 h then...
Natural rubber latex and various concentration of natural antioxidant were blended in different ratios irradiated at absorbed doses by gamma rays from Co-60 source room temperature. The aqueous extraction Diospyros peregrina was used as antioxidant. It found that the addition into improve aging property film. Decreasing tensile strength film with 10 phr 15 kGy radiation dose after 24 hours 100°C 9.34% compared to 13.89% for without strength, tear resistance modulus 500% elongation be optimum...
The properties of gelatin–polyvinyl alcohol (G–PVA) blend films were improved by methyl methacrylate (MMA) and γ irradiation for a practical viewpoint. prepared the casting method, modified glycerol MMA monomer, their mechanical also studied. gelatin-based successfully using (3.1 kGy) gelatin: PVA = 97:3 (w/w) as optimized. Tensile studied thermal characterized thermogravimetric analysis dynamic pointed out that treated both gelatin films, G–PVA showed less degradation than untreated films....
Natural Rubber Latex (NRL) and Polyvinyl pyrolidone (PVP) blends with different PVP concentrations were prepared rheological properties of NRL/PVP have been investigated at speed range. Significant changes behaviors are found increased in blends. Yield stress increases The increasing trend content blend. Shear yield increase Change nature rheogram NRL indicates the interaction between PVP. Increasing range, decreasing viscosity orderliness molecular segments