Abstract

Economic and environmental factors drive research into energy efficient processes and CO₂ capture materials. Currently, amine-based (e.g., monoethanolamine) technologies dominate CO₂ capture, but they are energy intensive and environmentally unfriendly due to volatile solvent emissions. Ionic liquids have been proposed as a viable alternative to conventional volatile solvents. This remarkable interest has resulted in a rapid growth of literature. The goal of this paper is to provide a general idea of the successes and challenges in finding an ionic liquid for CO₂ capture from flue gas streams. This article covers the computational data of CO₂ solubility in various ionic liquids. There is a focus on anions, cations, and functional groups in ionic liquid CO₂ solubility. Solvent designers can use these trends to sort through the vast number of theoretically possible ILs and their CO₂ absorption capacity by using suitable Ionic liquids.

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Abstract

Time study is considered the part of backbone of industrial management programs because the information that the time study generates is performed to eliminate waste. Before any improvement in quality and quantity of output, any study of operations time, any development of working method, any scheduling of work or balancing of work growth, the time study method is required. The aim of time study is to establish a time for a qualified worker to perform specified work under stated conditions and at a defined rate of working. Predetermined motion time systems is used as a technique of time and motion study in order to calculate standard minute value (SMV), measure and improve the existing amount of production, efficiency and the effect of time study on hoodie towards the productivity. Observing couple of apparel industries, it is noticed that the amount of production, efficiency of trained operators is higher than untrained operators. The amount of achieved production (pieces) per day, efficiency (%) per day, average production (pieces) per operator due to the higher amounts of production and efficiency of trained operators. Line balancing is also another cause which effects upon the production rate and efficiency percentage of operators. If factories management or administration take necessary steps to accumulate enough training facilities and do an appropriate line balance, then time study may affect positively over productivity and factories will able to achieve their target profit which increase the national remittance as well.

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Abstract

This research assessed how well various dry processes work when applied to various denim garment samples. The washing technology instills values, produces/modifies the exceptional final appearance, and ensures the customer's complete satisfaction. Dry processes like hand sanding, hand scraping, spraying with P.P. (Potassium Permanganate), destroying, tagging, whiskering, etc., are frequently employed in practice. In this study, we processed various denim garment specimens using P.P. spray, hand sanding, and laser engraving/fading (based on their weave construction).Then, under dry processing circumstances, we examined several physicomechanical parameters of the samples and compared the findings among them. Furthermore, we found that the treated samples' characteristics differed noticeably from those of untreated samples and other dry treated samples. Additionally, we have observed that the qualities such as colorfastness to washing, stains, dry rub andwet rub,are enhanced following various dry processes. The qualities of colorfastness to light, tearing strength, tensile strength, GSM, pilling, abrasion, etc., on the other hand, were found to be drastically diminished. Compared to those treated with the other two types of dry processing, like laser fading and P.P. spray, samples treated with hand sanding have a much more severe effect. However, laser fading samples required additional costs over hand sanding and P.P. spray.

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Abstract

Environmental sustainability is a great potential for any textile fiber. Textile industry is indicated as the biggest polluter of environment and enhance ecological imbalance and global climate change. Possibility of discovering non-conventional renewable biomass as natural fiber is being explored. Sansevieria Trifasciata is a leafy plant. It grows in different parts of the world including Indian subcontinent. Locally, it is called Baghachoker. Recently, a proximate study was undertaken in Primeasia University and preliminary information indicate its possibility for using as textile fiber for different diversified and value-added development.

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Abstract

In textile industry, the spirality influences knit fabric's functional and aesthetic performance, and clothes made from them show as a displacement of the side seam and arising a significant quality issue of fabric. This industry-based research aims to investigate the effect of various finishing processes while it is treated in the industry and find out the possible solution to control the spirality problem in the industry. The materials used for this study are 100% cotton ring yarn in counts 30 Ne, 32 Ne, 34 Ne, 36 Ne, and 40 Ne. Then dyeing, tumble drying, stenter and compacting process have carried out to investigate the effects. It is revealed that finer count yarn shows higher spirality compared to courser count while other parameters remain constant. Thus, we recommend taking the necessary steps when processing knit fabric with a finer spinning thread. In addition, we have observed that the compacting process provides a significant contribution to controlling the spirality. In this research, the experimental results indicate that the increase in stitch length causes a decrease in spirality while the yarn count is fixed. On the contrary, when stitch length is fixed, the increment of yarn count results in increments of spirality. Some exceptions were also experienced. The finding will help to the producer or buyer to get an idea about suitable stitch length toward the control of knit fabrics spirality in the industry. Thus, this research will help to step up a real problem of textile industry that is control of knit fabrics spirality at a tolerance level.

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Abstract

Kilbridge and Wester method is a heuristic method, which is used for balancing an assembly line. Efficient and effective solution could be found by using this method. However, it is being observed that garments factories of Bangladesh are mostly on parallel assembly line. In bottleneck processes, smooth flow of materials is ensured by parallel assembly line. However, this assembly technique is found less efficient and costly. Here we have focused on a Bangladeshi factory’s assembly line, which was making T-shirts for world-renowned brands. Here in this paper, existing assembly line’s performance is compared with Kilbridge and Wester method. A much better result is found using Kilbridge and Wester method than parallel assembly line. Its efficiency is found 82%; 34% higher than parallel line. And also 50% less labor cost is needed comparing with the other one. A clear view of assembly line problems in Bangladeshi garments factory is observed from this study. And, to deal with the problem this paper also discussed ways. In future, other heuristic methods should be applied and compared with conventional methods.

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Abstract

The degumming of Silk eliminates the cementing sericin layer from the surface, improving its color, texture, luster, absorbency, and drape while keeping the fibrous component, fibroin, intact. To transform raw Silk into clothing, the process of degumming Silk is obligatory; however, this process is usually followed by harmful chemicals. This work aims to perform eco-friendly degumming by optimizing the removal of the sericin content from Silk fully or partially, as residual Sericin on Silk can be used as an antimicrobial agent. This paper also studied the effect of the eco-friendly degumming process using papain-extracted protease enzyme and citric acid from lime on spun Silk fabric in different ratios. Subsequently, a comparative study is also made with the conventional alkaline/soap degumming process. In order to evaluate the degumming percentages, weight loss values supported by water vapor permeability and water absorbency tests were performed. Though conventional Alkali/soap treatment showed better results on degumming (23% wt. loss) over enzymatic degumming (10.82% wt. loss), there remains a question on the effect on the environment as well as on antimicrobial properties. To increase the antimicrobial properties of the fabric, naturally extracted Aloe Vera was used in various processes, including dip-pad-dry coating and spin coating. Agar well diffusion technique was used to evaluate the antimicrobial activity of the specimens with gram-positive bacteria E.coli and gram-negative bacteria S.aureus. Aloe Vera gel applied by dip-pad-dry method without binder showed maximum resistance to both types of bacteria. The antimicrobial properties of treated fabrics were also compared against raw and degummed silk fabric. The result showed better water absorbency and stronger antimicrobial resistance in Aloe Vera treated degummed silk fabric.

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Abstract

The textile and clothing industries are said to be one of the most polluting industries in Bangladesh. Reckless disposal of textile materials and used clothes in the environment harmed nature, social and human life. Particularly, Fast fashion retailing is a concerning area because it contributes significantly to the annual amount of clothing that needs to be thrown away. Used clothing that ends up in landfills contributes to environmental pollution in numerous ways. To create a sustainable livelihood, consumers must accept eco-friendly disposal behavior. Sustainable disposal of clothing refers to the disposal of clothing focusing mainly on socioeconomic and environmental issues. Thus to protect the environment, it is important to use apparel to its full swing by using one of the eco-friendly disposal ways which include donation, recycle, reuse, and reselling. This study aims to find out whether people in Bangladesh use sustainable disposal ways or not in disposing of their used clothes and to examine factors that motivate and influence such behavior. Three dimensions of the motivational factors in this study are determined as economic, environmental and social factors and the research methodology is conducted in a survey participation of 207 respondents from different areas of Bangladesh. The data is analyzed by using descriptive statistics. The results indicate that most of the people in Bangladesh are willing to use sustainable ways and the economic factor has the most significance to motivate and influence sustainable disposal behavior of used clothes whereas social factor and environmental factor have less influence on such behavior. Further, findings indicate that among the sustainable disposal ways (reuse, recycle, reduce) of used clothes, most of the people in Bangladesh prefer to donate their used clothes to other people.

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Abstract

Jute is golden fiber and major cash crop of Bangladesh. A great quantity of jute fibers is being produced and processed due to its availability. During jute fiber processing, mainly spinning, generation of different wastes creates a considerable amount of economic loss. This present study investigates the comparative analysis of generation of three major wastes namely, caddis, floating dust and sliver or thread waste during each operation of fiber processing with application of 18% (on the weight of jute reeds) mineral jute batching oil (JBO) based emulsion and vegetable sourced hydrocarbon free biodegradable soybean oil (SBO) based emulsion with same recipe for producing 16/1 lb/sp yarn. The results revealed that overall amount of wastages from spreading to precision winding was 3.36% higher in case of SBO based emulsion treatment than JBO. The amount of caddis and floating dust were 2.50% and 2.32% higher respectively whereas sliver waste was 1.46% lower in case of SBO emulsified fiber than JBO one.

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A qualitative testing methodology has been developed to assess the enzymatic biopolishing effect on textile substrates. The system divided the assessment into five grades: α-Alpha, ẞ-Beta, ɤ-Gamma, Ө-Theta, and δ-Delta to be meant as Not Satisfactory, Satisfactory, Good, Very Good, and Bad, respectively, depending on the amount of surface fibre removed after treatment. A stereo microscope has been used to analyse the surface of folded fabric and single yarn. Two different fabrics (scoured and bleached single jersey and black rib fabric) have been biopolished with three different commercial enzymes - Acid cellulase enzyme, Biopolish enzyme -880, and Azypolish-AC enzyme in a similar condition and finally graded according to this developed grading system. The grading system is an easier and potential way of assessing effect of biopolishing on textile materials.

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Abstract

Sustainability and upcycling are growing concerns. One way to ensure this is proper waste management and reduction. Some food wastages, to be specific lemon peel, orange peel and ginger peel are used here to develop an antimicrobial finish on knitted cotton fabric via the exhaust process. Each of these possesses inherent antimicrobial properties and was tested in the medium of two distinct microbe- Staphylococcus aureus and Escherichia coli. Though all of the extracts from the peel showed some extent of anti-microbial properties, the inhibition zone result varied depending on microbes and extracts. In addition to that, the durability of the finish and GSM of the fabrics (before and after the finish) were also tested.

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Abstract

Bangladesh's textile-clothing industry imports a large number of raw materials (intermediate components) from the outer world hence assembled them and exported to high-fashion demanded countries. This paper aims to analyze the gross exports of textile–clothing outputs in the global value chains in terms of various value–added components. This paper attempts to provide an overview of the raw materials' import (foreign value addition) scenario compared to domestic value-added in sub-sectors of the textile-clothing industry. This paper has utilized multi-regional input-output table of 2001, 2011, and 2019 from the Asian Development Bank and Bangladesh export and import values of textile finished goods and intermediate products for the years 2001, 2011, and 2019 from UNCTAD. The paper finds that the domestic value-added and foreign value-added in the textile–clothing industry’s exports were 87% and 11% respectively in 2011, whereas the double–counted amount was 2%. Domestic value-added has increased to 89% in 2019.

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Abstract

This study was done by using three basic coagulating agents for solid-liquid separation processes to reuse the industrials waste water and reduce an effective amount of chemical consumption as well as cost for treatment of textiles/ceramics industries wastewater. The experiment was conducted using jar tester to determine the optimum doses of Poly Aluminum Chloride, Alum and Lime for treatment of industrials wastewater. The three basic concentration was used in this investigation which were 1% Liquid Poly Aluminum chloride (PAC), 2 % Potassium Aluminum Sulfate (Alum), 4% Calcium Hydroxide (Lime). Here 0.05% Polyacrylamide was added with each chemical dose as coagulant. These three coagulating substances were used successfully to make the wastewater reusable. The turbidity, color hazen and Total Suspended Solid (TSS) was reduced up to 90%, 91% and 99.5% respectively. Among those chemicals only 1% Liquid Poly Aluminum Chloride dosing was more effective both in physic-chemical and economic suspects for removing significant amount of turbidity, color hazen and TSS. On the other hand, this chemical consumption was lower than that of others. This investigation suggests that using 1% Liquid Poly Aluminum chloride (PAC) coagulation agent is cost effective chemical treatment process which may be a useful in primary water treatment process for the industrials waste water.

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Abstract

Sizing is an essential process of weaving that can minimize the rate of yarn breakage while weaving in the loom. Usually, diversified adhesives including natural starches, natural polymers, and synthetic chemicals, are used to coat the yarn surface during sizing. Most of the sizing materials used in the textile industry of Bangladesh are imported. However, Bangladesh can efficiently produce starch domestically by utilizing the surplus amount of potatoes that become waste almost yearly. Insufficient cold storage facilities, surplus production, etc. are responsible for a notable amount of potato wastage in Bangladesh. The usage of these potatoes as sizing agent can be an effective solution to this issue, which can also save Bangladesh's sizing material import cost. This study assessed the technical feasibility of locally produced potato starch compared to the commercially used imported one-shot based sizing agents. Factors like yarn strength, extension%, abrasion resistance, size take-up%, reduction of yarn hairiness, and yarn count were subjected for both of the sizing agents to carry out the assessment. Both of the sizing materials showed similar results with slight deviation while considering the strength, extension%, size take-up%, and yarn count measurement. However, potato starch showed significantly improved performance in the parameters of abrasion resistance and reduction of yarn hairiness due to its excellent adhesive property. The study concluded that Bangladesh's locally produced potato starch can easily be a cost-effective, bio-degradable, and sustainable substitute for commercial one-shot sizing agents in terms of technical feasibility.

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