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textile and Leather Review 2024年 7卷 1216-1233页

作者： Islam, Md. Kamrul Uddin, Zulhash Repon, Md. Reazuddin Department of Wet Process Engineering Bangladesh University of Textiles Dhaka1208 Bangladesh Department of Textile Engineering Daffodil International University Dhaka1216 Bangladesh Department of Production Engineering Faculty of Mechanical Engineering and Design Kaunas University of Technology Studentų 56 KaunasLT-51424 Lithuania

Disperse dyes, primarily used for dyeing synthetic fibres like polyester, are characterized by their poor solubility in water, which necessitates the use of dispersing agents;however, environmental concerns arise due to their low biodegradability and potential toxicity, thus posing significant challenges in waste management and pollution control. This study explores the dyeing performance of knitted polyester with dispersed dyes, employing natural auxiliaries as substitutes for conventional commercial chemicals to promote an environmentally friendly approach. Citric acid (derived from lemon), sodium citrate (prepared from citric acid and sodium bicarbonate), and glucose (extracted from date fruits) replace commercial acetic acid, dispersing agent, and hydrolyze. Dyeing is conducted using the high-temperature and high-pressure methods with consistent parameters. A comparative study of the dyeing performance of the natural auxiliaries with the existing commercial chemicals was assessed concerning colour strength, different fastness properties, and the FT-IR diagram. Proton NMR is utilized for the structural determination of date fruit and lemon components. UV-Vis spectral data show that adding sodium citrate to the dispersed dye solution drops the absorbance value from 1.1457 to 0.58916, confirming sodium citrate's efficacy as a dispersing agent. With lower recipe costs, the environmentally friendly approach using natural auxiliaries exhibits comparable dyeing performance and excellent fastness properties, providing a sustainable alternative to traditional methods. © 2024, idd3. All rights reserved.

关键词： Dyeing

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Joining of INCONEL-625 by microwave hybrid heating and its performance analysis 3

Joining of INCONEL-625 by microwave hybrid heating and its p...

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3rd International Conference on Intelligent Robotics, Mechatronics and Automation Systems, IRMAS 2023

作者： Magdum, Bhauso Gaikwad, Vinayak Department of Mechanical Engineering Textile and Engineering Institute Ichalkaranji India Department of Mechanical Engineering Sharat Institue of Technology Polyetchnic Kolhapur India Textile and Engineering Institute Ichalkaranji India

Welding is a process in joining of two or more metals which is done by using or without using of filler materials. Domestic microwave ovens have been in use since last century. Now a day's microwave technology could be employed to process materials. The investigation is carried out to compare the performance of Joint formed by Microwave hybrid heating with respect to tungsten inert gas (TIG) welding. Radiations emitted from microwave are used to join INCONEL-625 by employing INCONEL-625 powder of grain size 40μm as interface material. Graphite, Silicon carbide (SiC) and Charcoal was used as a susceptor material. And thin graphite sheet is used as separator. Traditional TIG welding machine is used to join INCONEL625 plates with INCONEL-625 wire as filler material. Scanning electron microscope (SEM) characterization joints after welding shows complete melting of INCONEL-625 powder particles and good metallurgical bonding with surface. X-ray diffraction (XRD) reveals the formation of niobium and chromium carbides and intermetallic phases. Joining of same INCONEL-625 plates by using TIG welding has successfully conducted. The novelty of this study is to develop new material joining approach by microwave heating. The comparative study showed material diffusion in microwave hybrid heating is much greater than that of TIG welding. Weld formed by microwave heating is more effective that of TIG welding. © Published under licence by IOP Publishing Ltd.

关键词： Joining

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Cleaner Dyeing of Pineapple Fabric Using Musa acuminata Natural Dye and Acacia nilotica Bio-Mordant with Enhanced Functionality

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Journal of The Institution of Engineers (India): Series E 2024年第1期105卷 77-88页

作者： Kushwaha, Angika Singh, Satendra Chaudhary, Kavita Department of Design Banasthali Vidyapith Rajasthan Jaipur India Department of Textile and Fibre Engineering Indian Institute of Technology New Delhi India Department of Design Banasthali Vidyapith Rajasthan Jaipur304022 India

Natural dyeing of the textile substrate has been gaining interest in the last few decades if we consider environmental pollution and sustainability. Applying natural dyes with metallic or bio-mordant is entirely non-toxic, chemical-free, non-hazardous, and eco-friendly, in addition to the diverse functionalities attained by the fabric following the dyeing process. Banana midrib (Musa acuminata) is a natural product of anti-inflammatory, antibacterial, antiallergic, antioxidant, and anticancer properties used in pharmaceutical industries. It has brown-beige color and can be considered a natural dye. The novelty of this work is that banana midrib natural dye is applied on pineapple natural fabric. Because of the lack of affinity of this natural dye toward the textile substrate, this is applied with the help of babul bark as a bio-mordant over the pineapple. An interesting fact is that the color of babul bark is also brown-beige. Various concentrations of babul bark and banana midrib extract were used to dye the fabric. The fabric samples that underwent the dyeing process were tested for color coordinates, color strength, and fastness property determination while characterized for antibacterial, antioxidant, and ultraviolet protection. The color strength increased due to babul bark and banana midrib concentration. The dyed fabric has demonstrated exceptional properties in wash and rubbing fastness. The dyed fabric has shown 97.18% antibacterial activity, 99.87% antioxidant activity, and excellent ultraviolet protection. As a result, the successful dyeing of pineapple fabric using banana midrib natural dye and babul bark as a bio-mordant has been achieved. The dyeing process is both environmentally friendly and sustainable, imparting the fabric with multiple functionalities. Graphical Abstract: (Figure presented.) © The Institution of Engineers (India) 2024.

关键词： Antioxidants

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Study on preparation,characterization and application of mixed-colorants thermochromic microcapsules

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Particuology 2024年第5期88卷 89-97页

作者： Lan Zhou Jingpeng Ye Qinze Cai Guojin Liu Mehran Dadgar Guocheng Zhu Guoqing Zhang College of Textile Science and Engineering (International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou310018China School of Materials Science& Engineering Zhejiang Sci-Tech UniversityHangzhou310018China Department of Textile University of NeyshaburAdib BoulevardKhorasan Razavi ProvinceIran Zhejiang Charming Dyeing and Finishing Co. LtdJiaxing314500China Zhejiang Provincial Innovation Center of Advanced Textile Technology Shaoxing312000China

In order to expand the color-change range and make the discoloration temperature suitable for the daily textiles,a new formulation of mixed-colorants thermochromic core material is designed,in which crystal violet lactone(CVL)is the basic color former,bisphenol A(BPA)is the developer,especially the solvent-based dye and dodecyl dedecanoate are used as the extended dye and the solvent,*** electron microscope(SEM),differential scanning calorimeter(DSC)and thermogravimetric analyzer(TGA)were applied to study the morphology,encapsulation rate,non-isothermal crystallization behavior and thermal stability of the mixed-colorant thermochromic microcapsules(MCTMs)prepared by in-situ *** results show that MCTMs have good sphericity,uniform particle size,good thermal stability and the encapsulation rate can reach 86.73%.Under the non-isothermal conditions,the encapsulation of formaldehyde-melamine resin wall material can slightly reduce the crystallization rate of the solvent,but does not affect the relative crystallinity,thermal properties and discoloration sensitivity of the core *** the variety of ambient temperatures in the range of 20–35℃,the printed cotton fabrics with MCTMs could change color reversibly between different tones with good reliability and durability,and exhibit more gorgeous colors than the common thermochromic materials.

关键词： Thermochromic microcapsule Color-change range Phase-change material Crystallization behavior

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Designing a textile-Based One-Flag Piezoelectric and Triboelectric Nanogenerator for Harvesting Wind Energy

Designing a Textile-Based One-Flag Piezoelectric and Triboel...

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2024 International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic textiles, E-textiles 2024

作者： Ghalebi, B. Irannejad, F. Ghehsareh, Z. Shahbaz, Z. Shanbeh, M. Isfahan Univetsity of Technology Department of Textile Engineering Isfahan Iran University of Isfahan Department of Chemistry Isfahan Iran

ISBN: (纸本)9783000804298

According to the increasing demand for energy, the importance of sustainable and clean energy is undeniable. Wind energy, as a renewable power source for a variety of applications, has been of interest for many decades. In this research, a fully textile, flexible, and lightweight wind energy harvester is presented. A one-flag nanogenerator including PVDF-BaTiO3 (Polyvinylidene fluoride-barium titanate) and nylon nanofibers sandwiched between two conductive fabrics is used. Nylon and PVDF nanofibers respectively act as the electronegative and electropositive components in the triboelectric generating method. PVDF also plays a role as a piezoelectric material. The addition of BaTiO3 nanoparticles into PVDF enhances its piezoelectric properties and P-TENG electrical output. Mixing nylon and PVDF nanofibers through the electrospinning method results in an output voltage of up to 50V in response to a wind speed of 7m/s- 1,. © 2024 Fraunhofer IZM.

关键词： Rayon

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Eco-Dyeing and Functional Finishing of Cotton Fabric Using a Natural Colour Derived From Lotus Seed: Enhanced Fastness Properties with Chitosan

Textile and Leather Review

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textile and Leather Review 2024年 7卷 1039-1060页

作者： Rani, Jyoti Guru, Ramratan Singh, Jaswant Santhanam, Sakthivel School of Fashion Lovely Professional University Punjab Phagwara India School of Design Mody University of Science and Technology Rajasthan Lakshmangarh India Department of Textile Technology Park College of Engineering and Technology Tamilnadu Coimbatore India

Medicinal plant-based dyeing introduces vibrant colours alongside antibacterial and anti-odor properties, fostering sustainability. Innovations include mass sampling for consistent pigment production. Furthermore, lotus seedpods, rich in bioactive compounds, exhibit potential in diverse fields. Chitosan, a biopolymer derived from chitin, boasts versatility in drug delivery systems, wound healing, and antimicrobial applications. This experimental inquiry delves into the dyeability and antimicrobial efficacy of cotton fabric subjected to treatment with chitosan and dyed using Lotus seeds. The investigation encompasses varied parameters such as dye concentration, duration, and temperature for fabric dyeing. The study elucidates the aqueous extraction methodology for dye from Lotus seeds, the chitosan-based mordanting techniques. Standardized assessments are utilized to gauge colour fastness characteristics, encompassing washing, rubbing, and perspiration fastness, along with assessing the antimicrobial attributes of the treated cotton fabric. The study indicates that the application of chitosan-treated cotton fabric enhances dye intensity and overall dyeing quality, consequently improving the colour fastness property of washing, rubbing, and perspiration. Additionally, the treated cotton fabric exhibits significant antimicrobial activity against common bacteria, highlighting the potential of Lotus seed-derived colourants and chitosan mordant in the development of sustainable and antimicrobial textiles. The future scope lies in optimizing the integration of Lotus seed-derived colourants and chitosan mordant for enhanced sustainability and antimicrobial efficacy in textile applications, leveraging advancements in dyeing technology and antimicrobial formulation techniques. © 2024, idd3. All rights reserved.

关键词： Chitosan

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Synthetic Dyes for textile Colouration: Process, Factors and Environmental Impact

Textile and Leather Review

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textile and Leather Review 2022年 5卷 327-373页

作者： Islam, Touhidul Islam, Tarekul Islam, Tarikul Repon, Reazuddin Department of Textile Engineering Mawlana Bhashani Science and Technology University Tangail Bangladesh ZR Research Institute for Advanced Materials Sherpur Bangladesh Department of Textile Engineering Jashore University of Science and Technology Jashore Bangladesh Department of Textile Engineering Khwaja Yunus Ali University Sirajgang Bangladesh Department of Production Engineering Faculty of Mechanical Engineering and Design Kaunas University of Technology Kaunas Lithuania

Dyes are substances that enhance the appearance of finished goods by providing uniform colour. Dyeing is the application process of dyes that are fixed in textile fibers. The dyeing process uses various steps, including pretreatment, desizing, scouring, bleaching, carbonizing, degumming, and mercerization. Water is considered the primary medium for applying dyes and other chemicals for this treatment in the dyeing process. The dyeing process contains many toxic chemicals, metals and non-soluble substances, such as wastewater, which is thrown into the environment. It is noted that, during dyeing, around 50-300 liters of water is required for 1 kg of fiber. On the other hand, 1-2 million liters of water are needed every day for 50,000 meters of daily production. This massive amount of toxic wastewater is highly harmful to the environment, human health, aquatic system, soil, air, water, plants, and animals. This review paper states various dyeing processes with different dyes, including acid dye, direct dye, sulfur dye, reactive dye, vat dye, metal complex dye, azo dye, disperse dye, and basic dye. In contrast, it also describes the influencing factors of dyeing processes and methods. Moreover, this review demonstrates the impacts of textile dyes on the environment (water, soil, air emissions, human health) and illustrates possible remedial actions regarding wastewater. © 2022 The Author(s).

关键词： Effluent treatment

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Computer vision-based six layered ConvNeural network to recognize sign language for both numeral and alphabet signs

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Biomimetic Intelligence & Robotics 2024年第1期4卷 45-58页

作者： Muhammad Aminur Rahaman Kabiratun Ummi Oyshe Prothoma Khan Chowdhury Tanoy Debnath Anichur Rahman Md.Saikat Islam Khan Department of Computer Science and Engineering Green University of BangladeshDhakaBangladesh Department of Computer Science and Engineering National Institute of Textile Engineering and Research(NITER)Constituent Institute of Dhaka UniversityDhakaBangladesh Department of Computer Science and Engineering Mawlana Bhashani Science and Technology UniversityTangailBangladesh

People who have trouble communicating verbally are often dependent on sign language,which can be difficult for most people to understand,making interaction with them a difficult *** Sign Language Recognition(SLR)system takes an input expression from a hearing or speaking-impaired person and outputs it in the form of text or voice to a normal *** existing study related to the Sign Language Recognition system has some drawbacks,such as a lack of large datasets and datasets with a range of backgrounds,skin tones,and *** research efficiently focuses on Sign Language Recognition to overcome previous *** importantly,we use our proposed Convolutional Neural Network(CNN)model,“ConvNeural”,in order to train our ***,we develop our own datasets,“BdSL_OPSA22_STATIC1”and“BdSL_OPSA22_STATIC2”,both of which have ambiguous backgrounds.“BdSL_OPSA22_STATIC1”and“BdSL_OPSA22_STATIC2”both include images of Bangla characters and numerals,a total of 24,615 and 8437 images,***“ConvNeural”model outperforms the pre-trained models with accuracy of 98.38%for“BdSL_OPSA22_STATIC1”and 92.78%for“BdSL_OPSA22_STATIC2”.For“BdSL_OPSA22_STATIC1”dataset,we get precision,recall,F1-score,sensitivity and specificity of 96%,95%,95%,99.31%,and 95.78%***,in case of“BdSL_OPSA22_STATIC2”dataset,we achieve precision,recall,F1-score,sensitivity and specificity of 90%,88%,88%,100%,and 100%respectively.

关键词： Conv NeuralSign language CNN Static Feature extraction Convolution2D Fully connected layer Dropout

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Effect of zero bus load flow on network reconfiguration of distribution network

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International Journal of Ambient Energy 2023年第1期44卷 626-653页

作者： Das, Bikash Mukherjee, Vivekananda Barik, Soumyabrata Das, Debapriya Department of Electrical Engineering Govt. College of Engineering and Textile Technology West Bengal Berhampore India Jharkhand Dhanbad India Department of Electrical and Electronics Engineering Birla Institute of Technology and Science Pilani Goa India Department of Electrical Engineering Indian Institute of Technology West Bengal Kharagpur India

In this paper, a novel Student Psychology Based Optimization (SPBO) method with Zero Bus Load Flow (ZBLF) is proposed for the optimum placement of distributed generation sources (DGs) in the 33 bus distribution network (DN) with and without the network reconfiguration. To reduce the stress on the utility, a predefined/constant energy is considered to be imported from the utility at different load levels (annual hourly load patterns). The proposed method is used in the presence of multi-objective functions for the optimum placement of DGs with and without network reconfiguration that shows a considerable reduction in active power loss and voltage deviation as well as an increment in the annual energy savings. Besides, the comparative statistical analysis shows that the proposed method scored the first rank for all the cases and all the load percentages. This confirms the superiority of the proposed method over the different existing methods available in the literature. © 2022 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Electric load flow

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Unveiling the synthesis,characteristics,electrical conductivity,photocatalytic activity,and electrochemical activity of eco-friendly zinc oxide nanoparticles

Advanced Sensor and Energy Materials

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Advanced Sensor and Energy Materials 2024年第3期3卷 23-28页

作者： Redwanul Islam Suprio Shantanu Saha Reana Raen Nayeemul Islam Torikul Islam Department of Biomedical Engineering Khulna University of Engineering&TechnologyKhulna9203Bangladesh Department of Textile Engineering Khulna University of Engineering&TechnologyKhulna9203Bangladesh Department of Biomedical Engineering Chittagong University of Engineering&TechnologyRaozan4349Bangladesh Department of Electrical and Electronic Engineering Bangladesh University of Engineering and TechnologyDhakaBangladesh Department of Biomedical Engineering New Jersey Institute of TechnologyNewarkNJUSA

The Nigella Sativa seeds were utilized for the environment-friendly zinc oxide nanoparticles(ZnO NPs),as evident by the observation of a white *** analytical techniques,such as XRD,FTIR,UV–vis,SEM,and EDX,were utilized to describe the specimen's structural,optical,and electrical *** analysis was used to confirm that the ZnO NPs were *** absorbance peak at 401 nm was observed in the UV–vis,indicating that the ZnO NPs have a 2.91 eV *** groups are present in ZnO NPs,as seen by the FTIR *** nanoparticles'spherical form and average size of 37.9 nm were confirmed by the SEM *** analysis confirmed the composition of the nanoparticles,with zinc accounting for 73.17%and oxygen for 26.83%.ZnO NPs demonstrated excellent electrical conductivity because of their higher surface-to-volume ***,the synthesis of ZnO NPs exhibited effective degradation of methylene blue *** results point to potential applications in several domains,including electronics,biomedical devices,industry,and agriculture,and they call for immediate follow-up research.

关键词： Nigella sativa Zinc oxide nanoparticles SEM XRD Electrical conductivity Photocatalytic

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