I am Dr. Md. Shakhawat Hossain, currently serving as an Assistant Professor in the Department of Textile Engineering at Khulna University of Engineering and Technology (KUET). I hold a PhD in Frontier Fiber Technology and Science from the University of Fukui, Japan, completed in March 2024. Prior to that, I earned my Bachelor of Science in Textile Engineering from Bangladesh University of Textiles (BUTex), where I am also pursuing an M.Sc. Additionally, I hold an MBA from Jahangirnagar University, Bangladesh. With over 7 years of industrial experience in various managerial roles in a 100% export-oriented knit dyeing industry, and nearly 10 years of teaching experience in undergraduate engineering education, I have supervised 21 undergraduate projects to successful completion. I am a proud member of the Institution of Textile Engineers & Technologists (ITET), The Institution of Engineers, Bangladesh (IEB), and a Life Member of the Japanese Universities Alumni Association in Bangladesh (JUAAB). My research interests include the development of organic-inorganic hybrid materials, inorganic nanofibers, new functional materials (films and fibers), knit fabric processes, knit fabric structures, and knit fabric finishing. To date, I have published over 30 peer-reviewed journal articles and conference papers, with 8 more currently under review.
Organic-Inorganic Hybrid Materials Nanofiber Engineering Polymer Composites Electrospinning and Freeze-drying Techniques Knitting Technology Smart Textiles Functional Fibers.
Pilling is a common surface defect in fleece fabrics made of chief value cotton (CVC) and polyester cotton (PC). The term "Chief Value Cotton" refers to fabrics produced by mixing cotton and synthetic fiber such as polyester where cotton typically makes up more than half of the overall combination of polyester. Customers nowadays want polyester cotton blended fleece fabric with excellent pilling resistance, but it is difficult to improve pilling properties in polyester cotton blended fleece fabric. A variety of studies have been conducted to improve the pilling properties of single jersey CVC knit fabric. The primary goal of this study is to eliminate pilling in fleece fabrics made of three-thread polyester cotton blends. In this analysis, singeing with a heat setting was used to increase pilling resistance. According to this experimental study, the pilling resistance properties improve from grade 1 to grade 4, which is extraordinary. This method can be used to successfully solve the pilling problem in three thread polyester cotton blended fleece fabrics in the textile knitting industry.
Abstract Aluminum nitride (AlN) nanofibers were formed by heating polyvinyl alcohol (PVA)/boehmite precursor nanofibers at various temperatures in nitrogen gas flow. We designed AlN nanofiber as an effective thermal conductive filler to create long linear heat-transfer pathways in the resin. Aligned AlN nanofiber mats were fabricated using electrospinning of PVA/boehmite composite aqueous solution and were impregnated with polyvinyl butyral (PVB) solutions. The obtained sheets containing the aligned AlN nanofiber 47, 52, and 54 vol% had excellent thermal conductivity, 22, 21, and 19 W/(m·K), for aligned nanofibers direction in the sheet. The PVB/AlN nanofibers composite sheet also showed good electrical insulating properties below 1.0 × 10 12 Ω/cm 2 . Graphical Abstract
Heat dissipation ability plays a vital role in the performance of the electronic devices. In this study, the author tried to develop a high-performance heat dissipation sheet after preparing α-alumina nanofibers mat. Three-dimensional polyvinyl alcohol/boehmite precursor nanofibers were fabricated by freeze-drying machine followed by hot-pressing and heat treatment at various temperatures to produce α-alumina nanofibers mat. The aligned nanofibers mat were impregnated with polyurethane, which showed good thermal conductivity in the planar (7.9–14.4 W/mK) and thickness directions (5.1–15.6 W/mK) at 35–64 vol% α-alumina nanofibers content. The heat-dissipating sheet also showed superior electrical insulating property (2.2 × 1012 Ω/□). Hence, the author tried to develop a thermally conductive but electrically insulating heat spreader sheet so that electric devices can effectively eliminate generated heat from it.
ABSTRACT Polyvinyl alcohol (PVA) nanofibers have potential importance in industrial applications. In this study, three‐dimensional (3D) net‐structured PVA nanofibers are successfully fabricated using the spray‐freeze‐drying (SFD) technique for the first time. At first, different concentrations of PVA solutions from 0.001 to 5 wt% are applied to prepare PVA nanofibers using liquid nitrogen at −196°C by the SFD method. These nanofibers are characterized by scanning electron microscopy for morphological analysis, photo ruler software for diameter measurement, thermogravimetric analysis and differential scanning calorimetry for thermal stability and crystallinity, as well as nitrogen adsorption isotherms and pore size distribution curves for specific surface area and porous surface quality. Prepared SFD nanofibers with finer nano diameters, fewer beads, more regular 3D net‐structures and without any massive blocks are obtained from 0.05 to 1 wt%. These are compared with the nanofibers prepared by the freeze‐drying (FD) technique. The SFD method shows better results than the FD method in respect to fiber morphology, finer nanoscale diameter, crystallinity, specific surface area, and surface porous property. The best results are obtained from the nanofibers fabricated by the SFD method at 0.1 wt% concentration. Finally, the findings of this work open the opportunities for potential industrial applications and further development of PVA nanofibers.
Abstract Polyvinyl alcohol (PVA)/beryllium sulfate (BeSO 4 ) precursor nanofibers are fabricated by electrospinning technique, mixing PVA aqueous solution with BeSO 4 salt. The productivity is increased by adding polyethyleneimine (PEI) with PVA/BeSO 4 spinning solution. The beryllium oxide (BeO) nanofibers are obtained by calcinating the PVA/BeSO 4 /PEI precursor nanofiber heated at 1000 °C or above. The crystallographic structure of BeO nanofibers is examined by X-ray diffraction. The thermal behaviors of the pure PVA nanofibers, BeSO 4 salt, and PVA/BeSO 4 /PEI precursor nanofibers are studied by thermogravimetry analysis. The BeO nanofiber diameters are reduced with the increase in calcination temperatures. The specific surface area of the PVA/BeSO 4 /PEI precursor nanofibers is around 36.9 m 2 g −1 , and that of the BeO nanofibers calcined at 1200 °C is about 11.9 m 2 g −1 . The pore properties deteriorate due to sintering and blockage as the calcination temperature increases. This work introduces mesoporous BeO nanofibers for the very first time.
The BeO NFs’ elongated shape, which provides excellent heat pathways for the BeO NFs in the resin.
Abstract Inspired by a three‐dimensional (3D) structure, we demonstrate 3D aluminum nitride (AlN) nanofibers fabricated by a freeze‐drying technique using polyvinyl alcohol (PVA)/boehmite precursor nanofibers. After applying hot pressing, a series of PVA/boehmite precursor nanofibers were prepared with varying PVA‐to‐boehmite ratios (30/70 wt%, 50/50 wt%, and 70/30 wt%). Our findings reveal that the thermal conductivity of the AlN composite nanofibers is significantly affected by the relative proportions of PVA and boehmite, where the ratio of PVA should be more significant than that of boehmite. We produced AlN nanofibers at a lower temperature (1500°C) than the theoretical formation temperature of AlN (1664°C). The minimum specific surface area and pore volumes were 8.39 m 2 /g and 0.0166 cm 3 /g, respectively, at 1500°C. X‐ray photoelectron spectroscopy spectra measured 38.27% aluminum and 23.55% nitrogen in AlN nanofibers. The aligned AlN nanofibers mat was impregnated with polyurethane (PU), which showed good thermal conductivity in the planar (4.1–13.6 W/(m·K)) and thickness (1.5–4.9 W/(m·K)) directions at 18–56 vol% AlN nanofibers content. The heat‐dissipating sheet also showed superior electrical insulating (1.2 × 10 12 Ω/cm 2 ) properties. In this study, the author sought to develop a heat‐spreading material made of thermally conductive, but electrically insulating PU/AlN nanofibers that could efficiently dissipate heat from electric devices.
Sizing is one of the essential steps in fabric manufacturing for increasing weaving production efficiency in the case of cotton and cotton blend fabrics by providing a protective coating to warp yarn that does not add any functional value. This research aimed to analyze the effects of size add-on% and two sizing process parameters, such as sizing machine speed and squeezing roller pressure, on the average warp yarn breakage rate during weaving. The sizing experiments have been conducted based on the size add-on% (8.93 %, 9.94%, 11.23%), sizing machine speed (35 yards/min, 38 yards/min, 40 yards/min), and squeezing roller pressure (2.2 kg, 3.3 kg, 3.5 kg) on the 30Ne 100% cotton warp yarn. It was found from the experimental results that the warp yarn breakage rate was increased with the rise in sizing machine speed and squeezing roller pressure. In contrast, the lowest warp yarn breakage rate was exhibited in size add-on% 9.94 in the loom during weaving. Based on the research, promising industrial application is highlighted for future fabric production. Journal of Engineering Science 13(2), 2022, 111-115
The market demand for three-thread fleece fabric is increasing steadily due to its soft and bulky texture. Garments made from knitted fleece fabric, such as sweaters and jackets, are generally used for outdoor wear, especially in the winter season because of their warmth, moisture, and absorption properties. However, the elastic properties of three-thread fleece fabric is reduced significantly after the raising operation. This study aimed to increase the elastic recovery of three-thread fabric by changing the stitch length during the manufacturing process in industrial-scale production. The results showed that by varying the stitch length, the elastic recovery was improved by around 9%. Hence, the developed method can be used in textile knitting industries to improve the elastic recovery of fleece fabric.
The main components of a polo shirt are the body and collar. For different body measurements, different collar sizes are needed. It is very crucial to select the perfect collar size according to body size; otherwise, collar size will be larger or smaller than the required size. However, producing and maintaining perfect collar size concerning body size is very tough as the collar is tiny. If the finished collar size is larger or smaller than the appropriate size, the manufacturer is supposed attach the incorrectly measured collar to the body, placing the customer at risk of a vital quality argument. Otherwise, the manufacturer would have to remake the collar, wasting both time and money. Sometimes, the knitting industry has to deal with purchase order cancellations due to a lack of lead time for replication. To avoid the complexities described earlier, quantitative equations for collar production based on the number of ply, stitch duration, and needle count were established in this study. The precision of this exploration work is approximately 100 percent for matching exact collar size with body size. As a result, the evolved technique can be used in the textile knitting industry to ensure that accurate specifications are met the first time.
Quality is of prime importance in any aspect of a business. Customers demand and expect value for money. Quality and reputation are interlinked with each other; a low-quality product can lead to the damage to the brand image which will be an immeasurable loss for any company. So in that regard quality is the money. Since the popularity of knitted fabric is increasing consistently it is really important to maintain the quality of the supplied product (ex. Garment). Without maintaining high quality there is no other way to survive in this competitive market. In this study, the quality of the finished fabric of a knit factory was observed for the period of 12 months. The Frequencies of different faults on Different Types of finished knitted fabric i.e. Single jersey, Lycra Single jersey, Rib (1*1, 2*1, 2*2, 4*2 etc.), Lycra rib, Interlock, Terry, Fleece, Pique, Lactose, Mesh, Waffle etc. were analyzed. According to the Pareto chart, it was found that 90.10% of the defects were caused by only 4 types of defects i.e. Hole, Contamination, Dirty Spot, Oil Spot and lycra out among 20 types of defect. The root causes for all types of defects were analyzed and their improvement technique discussed.
Abstract Alumina/ferric oxide (Al₂O₃/Fe₂O₃) composite nanofibers were fabricated via electrospinning followed by heat treatment. Structural characterization revealed mesoporous morphology with high porosity and surface area and uniform dispersion of catalytically active Fe₂O₃ nanoparticles. Catalytic evaluation for ethanol dehydration demonstrated superior performance for nanofibers containing 5 wt% Fe₂O₃, attributed to their unique structural features. Further enhancement was achieved by incorporating palladium oxide (PdO), resulting in improved catalytic activity, particularly in ethylene productivity. Surface acid properties were altered with PdO addition, suggesting a role of Lewis acid sites in augmenting catalytic performance. The developed PdO/Al₂O₃/Fe₂O₃ nanofibers exhibit stable performance over multiple cycles, offering promising prospects for efficient ethanol dehydration catalysts.
In recent years, the demand for knit fabric has increased significantly due to some of its unique properties like comfortability, stretchability, easy care, excellent wrinkle resistance and a high degree of fashion features. Among the different types of knit fabric, rib fabric is very popular for its elasticity. There is a demand for more elasticity of rib fabric in manufacturing apparel like sportswear. A common practice is to use elastane yarn along with native yarn to increase the knit fabric’s elasticity. Elastane fibres are synthetic fibres which are not comfortable. Elastane yarns are costly and cause a few difficulties during knitting. In this study, a combination of mechanical and chemical finishing processes has been introduced to increase the elasticity of 100% cotton rib fabric. The best possible finishing route was incorporated to maximize the rib fabric elasticity. It was observed that rib fabric elasticity can be increased up to 1.5 times from its native value. The material cost between the new proposed process and the existing elastic fabric manufacturing process was compared. It was found that the new process is much cheaper. This is an approach to finding an easy, industrially applicable and cost-effective method to maximize rib fabric elasticity without using any elastane yarn.
