G. M. Arifuzzaman Khan

Bio: G. M. Arifuzzaman Khan is an academic researcher from Islamic University. The author has contributed to research in topics: Fiber & Ultimate tensile strength. The author has an hindex of 10, co-authored 33 publications receiving 450 citations.

Studies on the mechanical properties of woven jute fabric reinforced poly(l-lactic acid) composites

Abstract: Development of ecofriendly biocomposites to replace non-biodegradable synthetic fiber composites is the main objective of this study. To highlight the biocomposites as a perfect replacement, the plain woven jute fabric (WJF) reinforced poly( l -lactic acid) (PLLA) composites were prepared by the hot press molding method. The influence of woven structure and direction on the mechanical properties i.e. tensile, flexural and impact properties was investigated. The average tensile strength (TS), tensile modulus (TM), flexural strength (FS), flexural modulus (FM), and impact strength (IS) of untreated woven jute composite (in warp direction) were improved about 103%, 211%, 95.2%, 42.4% and 85.9%, respectively and strain at maximum tensile stress for composite samples was enhanced by 11.7%. It was also found that the strengths and modulus of composites in warp direction are higher than those in weft direction. WJF composites in warp and weft directions presented superior mechanical properties than non-woven jute fabric (NWJF) composites. Chemical treatment of jute fabric through benzoylation showed a positive effect on the properties of composites. Morphological studies by SEM demonstrated that better adhesion between the treated fabric and PLLA was achieved.

Surface modification of okra bast fiber and its physico-chemical characteristics

Abstract: The effect of chemical treatment i.e. bleaching, alkalization and graft copolymerization on the morphology changes of okra bast fiber has been investigated by means of infrared spectroscopy (IR), scanning electron microscopy (SEM), water absorption and tensile properties measurements. The graft copolymerization reaction of bleached fiber with acrylonitrile monomer (AN) has been carried out under the catalytic influence of K2S2O8 and FeSO4 redox system. The maximum graft yield (11.43 %) has been found at 70°C temperature, 3×10−2 mol/l acrylonitrile, 5×10−3 mol/l K2S2O8, 5×10−3 mol/l FeSO4 and for 90 min. On the contrary, the fiber has been treated with 10 % NaOH solution, which is much effective to remove the impurities. Based on findings of water absorption, tensile properties and SEM micrograph, the AN-grafted fiber has been showed better properties than bleached and alkali treated fibers. The degree of modification of okra bast fiber by chemical treatment has been evaluated by IR measurement.

Influence of chemical treatment on the properties of banana stem fiber and banana stem fiber/coir hybrid fiber reinforced maleic anhydride grafted polypropylene/low-density polyethylene composites

Abstract: Banana stem fiber (BSF) reinforced low-density polyethylene (PE) composites were prepared with a hot-press molding machine in the presence of maleic anhydride grafted polypropylene (MAPP). To achieve better mechanical properties, the fiber was chemically modified by bleaching, alkalization, and acetylation. The ultimate tensile strength (UTS) of the untreated and treated BSF composites were found to increase with increasing fiber loading up to 20%, whereas the maximum Charpy impact strength (IS) and flexural strength (FS) values were seen at 10% fiber loading; these values decreased thereafter. The Young's modulus (YM) values of the BSF composites increased sharply with fiber loading. All of the treated fibers exhibited better mechanical properties than the untreated ones. The acetylated fiber showed higher UTS (44 MPa), FS (50 MPa), and IS (12.5 j/m 2 ) values than the other treated and untreated fibers. The improvements in the mechanical properties of the treated composites were further supported by scanning elec- tron microscopy images of the fracture surfaces. The thermal stabilities of the composites were studied by means of thermogravime- try, differential thermogravimetry, and differential thermal analysis measurements. Hybrid composites composed of BSF (10 wt %), coir fiber (5 wt %), and a MAPP/low-density PE matrix were prepared. Significant improvements in UTS, YM, FS, and IS were seen in the hybrid composites containing surface-modified BSF. The effects of BSF composition on the composite properties were also studied. V C 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 128: 1020-1029, 2013

Thermal characterization of chemically treated coconut husk fibre

Abstract: Effect of chemical treatments using sodium chlorite, sodium hydroxide and acrylamide monomer on thermal behavior of coconut husk (coir) fibre has been studied by means of scanning electron microscopy (SEM) and thermogravimetric analyses (TG, DTG, DTA). A significant variation in fibre surface occurred by chemical treatments is clearly observed in SEM images. The TG and DTA curves show two-stages of decomposition for all the fibres; first below 100°C indicating the moisture loss and the second between 320°C and 360°C due to major degradation of fibre. Chemical treatment increases the thermal stability of fibre through physical and chemical changes. It is found that the temperature below 180°C marginally affects fibre properties, whereas temperature at 180°C significantly decreases tensile strength and degree of polymerization.

Effect of Chemical Treatments on the Physical Properties of Non-woven Jute/PLA Biocomposites

Abstract: Biocomposites based on poly(L-lactic acid) (PLA) and non-woven jute fabrics (NWJF) were fabricated by sandwiching non-woven jute mat between PLA sheets. First, composites were fabricated with various weight proportions of jute fabric (5, 10, 20, and 30 wt.%) with the PLA matrix, and the effect of fabric loading on their mechanical properties was investigated. Higher mechanical properties were found at 10 wt.% fabric-loaded composite. The results show that the tensile, flexural, and impact strengths were increased by 61.7, 52.3, and 47.2%, respectively, as compared with neat PLA. In the second part, the jute fabrics were chemically treated with NaOH, NaClO2, acrylonitrile, acetic anhydride, KMnO4, diphenylmethane diisocyanate, and benzoyl chloride. The effect of chemical treatment on the mechanical and water absorption properties of NWJF/PLA biocomposites was studied. The mechanical properties of these biocomposites were found to be higher than those of untreated biocomposites. Among all the treatments, the combined alkali-benzoylated-treated fabric composite showed higher mechanical properties. The water absorption properties of these composites were found to be remarkably lower than those of untreated fibers. The interfacial adhesion between the fiber and the matrix was shown to increase with surface modification as revealed by SEM analysis.

Smart Textiles for Electricity Generation.

Abstract: Textiles have been concomitant of human civilization for thousands of years. With the advances in chemistry and materials, integrating textiles with energy harvesters will provide a sustainable, environmentally friendly, pervasive, and wearable energy solution for distributed on-body electronics in the era of Internet of Things. This article comprehensively and thoughtfully reviews research activities regarding the utilization of smart textiles for harvesting energy from renewable energy sources on the human body and its surroundings. Specifically, we start with a brief introduction to contextualize the significance of smart textiles in light of the emerging energy crisis, environmental pollution, and public health. Next, we systematically review smart textiles according to their abilities to harvest biomechanical energy, body heat energy, biochemical energy, solar energy as well as hybrid forms of energy. Finally, we provide a critical analysis of smart textiles and insights into remaining challenges and future directions. With worldwide efforts, innovations in chemistry and materials elaborated in this review will push forward the frontiers of smart textiles, which will soon revolutionize our lives in the era of Internet of Things.

Natural Fibers as Sustainable and Renewable Resource for Development of Eco-friendly Composites: A Comprehensive Review

Abstract: The increase in awareness of the damage caused by synthetic materials on the environment has led to the development of eco-friendly materials. The researchers have shown a lot of interest in developing such materials which can replace the synthetic materials. As a result, there is an increase in demand for commercial use of the natural fiber-based composites in recent years for various industrial sectors. Natural fibers are sustainable materials which are easily available in nature and have advantages like low-cost, lightweight, renewability, biodegradability and high specific properties. The sustainability of the natural fiber-based composite materials has led to upsurge its applications in various manufacturing sectors. In this paper, we have reviewed the different sources of natural fibers, their properties, modification of natural fibers, the effect of treatments on natural fibers, etc. We also summarize the major applications of natural fibers and their effective use as reinforcement for polymer composite materials.