Md. Abul Hossain

Mechanical and Electrical Properties of Jute Fabrics Reinforced Polyethylene/Polypropylene Composites: Role of Gamma Radiation

Jute fabrics reinforced polyethylene (PE), polypropylene (PP) and mixture of PP+PE matrices based composites (50 wt% fiber) were prepared by compression molding. It was found that the mixture of 80% PP + 20% PE hybrid matrices based jute fabrics reinforced composites performed the best results. Gamma radiation (250–1000 krad) was applied on PP, PE and jute fabrics then composites were fabricated. The mechanical properties of the irradiated composites (500 krad) were found to increase significantly compared to that of the non irradiated composites. Electrical properties like dielectric constant, loss tangent and conductivity with temperature variation of the composites were studied.

Fabrication and Characterization of Jute Reinforced Polypropylene Composite: Effectiveness of Coupling Agents

Composites based on poly (propylene) (PP) matrix and both, untreated 2-hydroxyethyl methacrylate (HEMA) and starch treated jute fabrics were prepared by compression molding. Fiber content in the composites was optimized (45% by weight) with the extent of mechanical properties. HEMA solutions of different concentrations in methanol (MeOH) along with the photoinitiator Darocur-1173 were prepared. Jute fabrics treated with 15% HEMA at 20th UV (ultraviolet radiation) pass for 15 min showed better performance. For the improvement of the properties, jute fabrics were treated with starch solutions of different concentrations for different soaking times. Improved mechanical properties, such as tensile strength (19%), tensile modulus (29%), bending strength (27%), bending modulus (12%), and impact strength (60%), were found in 5% starch treated jute fabrics/PP composites as compared to the untreated composite. HEMA treated jute fabrics were again treated with starch (5%) solution and found to deliver the best results, such as tensile strength (23%), bending strength (35%), tensile modulus (33%), bending modulus (15%), and impact strength (71%), over the untreated composite. Scanning electron microscopic analysis, water uptake, thermal aging, and dielectric properties of the treated and untreated composites were performed.

Mechanical Properties of the Coir Fiber-reinforced Polypropylene Composites: Effect of the Incorporation of Jute Fiber

Coir yarn-reinforced polypropylene (PP)-based unidirectional composites were prepared by compression molding. Coir yarn content in the composite was optimized and 20% yarn content showed higher mechanical properties. Jute yarns (20%—100%) were incorporated into the coir-based composites. It was found that 20% coir and 80% jute-reinforced PP matrix composites performed the best results. All the materials (coir, jute, and PP) were irradiated with gamma radiation from 400 to 1000 krad. PP-based composites (20% coir and 80% jute) showed the highest mechanical properties at 600 krad of total gamma dose. Starch (2—10% in aqueous solution) was used as stiffening agent for the yarns and it was found better unidirectional position of the yarns inside composite over the untreated composite. It was reported that composites prepared with 5% starch treated yarns (coir and jute) for 5 min soaking time demonstrated the best results. Scanning electron microscopy, thermal degradation, water uptake, and electrical properties were also studied.

Physico-Mechanical, Interfacial, Degradation, and Dielectric Properties of Jute/PP Composites: Effect of Dye and Gamma Radiation

Jute fabrics/polypropylene composites were prepared by compression molding. Jute fabrics were treated with red dye solutions (0.1–1%, w/w) for different soaking times and we found that 0.5% red-dye-treated jute/PP composite for 5 min soaking time showed better results. Gamma radiation (250-1000 krad dose) was applied on both jute and matrices. Composites were fabricated with non-irradiated jute/non-irradiated PP (C-0), non-irradiated jute/irradiated PP (C-1), irradiated jute/non-irradiated PP (C-2), and irradiated jute/irradiated PP (C-3). It was found that a C-3 composite made using 500 krad dose showed the best results. Simulating weathering and dielectric properties of the composites were also performed.

Effect of Ultraviolet Radiation on the Mechanical and Dielectric Properties of Hessian Cloth/PP Composites with Starch

Hessian cloth (jute fabrics) reinforced poly(propylene) (PP) composites (45 wt% fiber) were prepared by compression molding and the mechanical properties were evaluated. Jute fabrics and PP sheets were treated with UV radiation at different intensities and then composites were fabricated. It was found that mechanical properties of the irradiated jute and irradiated PP-based composites were found to increase significantly compared to that of the untreated counterparts. Irradiated jute fabrics were also treated with aqueous starch solution (1–5%, w/w) for 2–10 min. Composites made of 3% starch-treated jute fabrics (5 min soaking time) and irradiated PP showed the best mechanical properties. Tensile strength, bending strength, tensile modulus, bending modulus and impact strength of the composites were found to improve 31, 41, 42, 46 and 84% higher over untreated composites. Water uptake, thermal degradation and dielectric properties of the resulting composites were also performed.