Search results

1 – 10 of 95
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 1 August 2012

Hebeish Ali, Mohamed Hashem, Nihal Shaker, Mohamed Ramadan, Bahiya El-Sadek and Marwa Abdel Hady

Cotton-based fabrics, namely loomstate cotton fabric, grey mercerized cotton fabric, loomstate cotton/polyester (50/50 and 35/65) blended fabric were bio-desized by α amylase…

264

Abstract

Cotton-based fabrics, namely loomstate cotton fabric, grey mercerized cotton fabric, loomstate cotton/polyester (50/50 and 35/65) blended fabric were bio-desized by α amylase enzymes and bio-scoured by alkaline pectinase enzymes. The obtained bio-scoured substrates were subject to bleaching with peracetic acid and proceeded for bio-polishing under a variety of conditions. Results show that the extent of bio-polishing depends on the conditions of the treatment. The loss in fabric weight exhibits values which are comparable at 50° and 60°C and substantially higher than those obtained at 40°C. Temperatures of bio-polishing, specifically 40° and 50°, decrease the whiteness index; higher temperature, i.e. 60 °C, does not cause further decrease in the whiteness index whereas the tensile strength decreases. The temperature has a positive effect on surface roughness particularly when bio-polishing is performed at 50°and 60 °C. It was also found that cellulase is more active in mercerized cotton than in either 100 % cotton or cotton/polyester blend. The scanning electron micrograph of fibers after the enzymatic treatment reveals smoothened faces. The ridges that are present in the untreated fiber samples are not found in the case of cellulase-treated fibers. Bio-polishing of cotton fabrics can offer unmatched results by optimizing the process conditions, which can be otherwise achieved with chemical finishes. Reasonably good results were obtained from all the cotton and cotton blend fabrics and show high flexibility and versatility of the treatment in the manufacturing process.

Details

Research Journal of Textile and Apparel, vol. 16 no. 3
Type: Research Article
ISSN: 1560-6074

Keywords

Access Restricted. View access options
Article
Publication date: 1 May 2005

Rkia Refai, Mohamed Hashem and Ali Hebeish

Significant enhancement in the performance of durable press cotton fabric could be achieved through the utilization of non- formaldehyde crosslinking agents along with ionic…

49

Abstract

Significant enhancement in the performance of durable press cotton fabric could be achieved through the utilization of non- formaldehyde crosslinking agents along with ionic crosslinking. Ionic crosslinking was first effected by subjecting cotton fabric succesively to partial carboxymethylation using monochloroacetic acid and sodium hydroxide, then by cationization using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride known commercially as Quat-188. While the partial carboxymethylation reaction introduces the negatively charged group in the cellulose chains of cotton, the cationization reaction introduces the positively charged groups, thereby causing ionic crosslinking. The ionically crosslinked cotton was then crosslinked using either glyoxal, epichlorohydrin, or gluteral-dehyde. Most of the results obtained indicated that a balance between wet and dry wrinkle recovery angles that acquired a value as high as 300° could be obtained without loss in tensile strength and elongation at break. The results also revealed that the degree of ionic crosslinking relies on the nitrogen and carboxyl contents of the finished fabric as well as on the nature of the non-formaldehyde finishing agent used. Indeed the results of this work present a new approach to the durable press finishing of cotton, and mill trials should be conducted.

Details

Research Journal of Textile and Apparel, vol. 9 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Access Restricted. View access options
Article
Publication date: 1 February 2003

Peter J. Hauser, C.Brent Smith and Mohamed M. Hashem

Cellulose crosslinking is a very important textile chemical process, and is the basis for a vast array of durable press and crease-resistant finished textile products…

71

Abstract

Cellulose crosslinking is a very important textile chemical process, and is the basis for a vast array of durable press and crease-resistant finished textile products. Formaldehydecontaining N-methylol crosslinkers give fabrics desirable properties of mechanical stability (e.g., crease resistance, anti-curl, shrinkage resistance, durable-press), but also impart a loss of strength and the potential to release formaldehyde, a known human carcinogen. Other systems, such as polycarboxylic acids, have been tested with varying degrees of success. We have developed methods of forming ionic crosslinks that provide outstanding performance in crease angle recovery while completely retaining the strength of treated goods, without the potential to release any reactive materials of low molecular weight, such as formaldehyde.

Our work is based on the reactions of cellulose with materials that impart an ionic character to the cellulose; e.g., chloroacetic acid for negative charges or 3-chloro-2-hydroxypropyl trimethyl ammonium chloride for positive charges. These reactions produce ionic celluloses that can then absorb a polyionic material of opposite charge to form crosslinks.

Cellulose treated with cationized chitosan after carboxymethylation showed significant increases in crease recovery angles without a loss of strength.

Details

Research Journal of Textile and Apparel, vol. 7 no. 1
Type: Research Article
ISSN: 1560-6074

Keywords

Access Restricted. View access options
Article
Publication date: 1 March 2024

Khaled Mostafa and Azza El-Sanabary

The novelty addressed here is undertaken by using tailor-made and fully characterized starch nanoparticles (SNPs) having a particle size ranging from 80 to 100 nm with a larger…

49

Abstract

Purpose

The novelty addressed here is undertaken by using tailor-made and fully characterized starch nanoparticles (SNPs) having a particle size ranging from 80 to 100 nm with a larger surface area, biodegradability and high reactivity as a starting substrate for cadmium ions and basic dye removal from wastewater effluent. This was done via carboxylation of SNPs with citric acid via esterification reaction using the dry preparation technique, in which a simple, energy-safe and sustainable process concerning a small amount of water, energy and toxic chemicals was used. The obtained adsorbent is designated as cross-linked esterified starch nanoparticles (CESNPs).

Design/methodology/approach

The batch technique was used to determine the CESNPs adsorption capacity, whereas atomic adsorption spectrometry was used to determine the residual cadmium ions concentration in the filtrate before and after adsorption. Different factors affecting adsorption were examined concerning pH, contact time, adsorbent dose and degree of carboxylation. Besides, to validate the esterification reaction and existence of carboxylic groups in the adsorbent, CESNPs were characterized metrologically via analytical tools for carboxyl content estimation and instrumental tools using Fourier-transform infrared spectroscopy (FTIR) spectra and scanning electron microscopy (SEM) morphological analysis.

Findings

The overall adsorption potential of CESNPs was found to be 136 mg/g when a 0.1 g adsorbent dose having 190.8 meq/100 g sample carboxyl content at pH 5 for 60 min contact time was used. Besides, increasing the degree of carboxylation of the CESNPs expressed as carboxyl content would lead to the higher adsorption capacity of cadmium ions. FTIR spectroscopy analysis elucidates the esterification reaction with the appearance of a new intense peak C=O ester at 1,700 cm−1, whereas SEM observations reveal some atomic/molecules disorder after esterification.

Originality/value

The innovation addressed here is undertaken by studying the consequence of altering the extent of carboxylation reaction expressed as carboxyl contents on the prepared CESNPs via a simple dry technique with a small amount of water, energy and toxic chemicals that were used as a sustainable bio nano polymer for cadmium ions and basic dye removal from wastewater effluent in comparison with other counterparts published in the literature.

Details

Pigment & Resin Technology, vol. 54 no. 2
Type: Research Article
ISSN: 0369-9420

Keywords

Access Restricted. View access options
Article
Publication date: 29 September 2023

Mohamed Aboelmaged, Saadat M. Alhashmi, Gharib Hashem, Mohamed Battour, Ifzal Ahmad and Imran Ali

The literature on knowledge management in sustainable supply chain (KMSSC) has witnessed significant growth in the past two decades. However, a scientometric review that…

527

Abstract

Purpose

The literature on knowledge management in sustainable supply chain (KMSSC) has witnessed significant growth in the past two decades. However, a scientometric review that consolidates the primary trends and clusters within this topic has been notably absent. This paper aims to scrutinize recent advancements and identify the intellectual underpinnings of KMSSC research conducted between 2002 and 2022.

Design/methodology/approach

The present review employs a scientometric analysis approach via visualization maps of prolific contributions, co-citation, co-occurrence and thematic networks to examine a total of 114 articles and conference papers on KMSSC.

Findings

Emerging research frontiers and hotspots are revealed and a state-of-the-art framework of KMSSC research structure is developed.

Practical implications

The review provides significant implications that guide KMSSC research and better inform sustainability decisions in the supply chain context.

Originality/value

To the best of the authors' knowledge, this is the first review to thoroughly synthesize the intersected domain of KMSSC using scientometric analysis.

Details

Benchmarking: An International Journal, vol. 31 no. 10
Type: Research Article
ISSN: 1463-5771

Keywords

Access Restricted. View access options
Article
Publication date: 20 August 2024

Gharib Hashem and Mohamed Aboelmaged

The rapid global changes we are witnessing pose a pressing challenge that necessitates reevaluating conventional supply chain practices. Consequently, the integration of digital…

170

Abstract

Purpose

The rapid global changes we are witnessing pose a pressing challenge that necessitates reevaluating conventional supply chain practices. Consequently, the integration of digital technologies into supply chain operations, often referred to as digital supply chain (DSC), has emerged as a strategic shift that aims to empower organizations to proactively seize new opportunities rather than being caught off guard by unforeseen disruptions arising from economic volatility, global pandemics and regional conflicts. Thus, this study embraces a knowledge-centric approach to explore the direct and indirect impact of knowledge management, innovation and learning capabilities on DSC adoption in an emerging economy context. Furthermore, it aims to shed light on the moderating role of environmental dynamism in this intricate interplay.

Design/methodology/approach

Employing a cross-sectional survey, the research data were collected from 354 managers representing Egyptian manufacturing and service firms utilizing a structured questionnaire. Data analysis was conducted using Partial Least Squares Structural Equation Modeling (PLS-SEM).

Findings

The results unveiled that knowledge management capability (KMC) has the highest path coefficient value among all endogenous variables. It accounts for a significant portion of the variance in innovation and learning capabilities, which play pivotal roles in adopting DSC. Notably, learning capability appears to exert a more powerful influence on DSC adoption than innovation capability through direct and mediating effects. Furthermore, the findings underscore the moderating effect of environmental dynamism on the relationship between learning capability and DSC adoption. However, this moderating role is not observed in the link between innovation capability and DSC adoption.

Practical implications

There is a growing trend among firms to adopt DSC in response to significant environmental shifts. This study offers valuable insights for managers and policymakers, providing them with a deeper understanding of the DSC adoption process. The study’s findings assist in identifying crucial factors that boost DSC adoption and offer guidance on successfully leveraging digital technologies for managing supply chain practices. Moreover, the study offers stimulating directions for future DSC research directions.

Originality/value

The study contributes to the existing literature by expanding our understanding of the adoption of DSC by utilizing knowledge, innovation and learning capabilities within the context of emerging economies.

Details

Benchmarking: An International Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1463-5771

Keywords

Access Restricted. View access options
Article
Publication date: 5 January 2024

Gharib Hashem, Mohamed Aboelmaged and Ifzal Ahmad

This paper has predicted digital supply chain (DSC) adoption through the role of firms' proactiveness, knowledge management capability (KMC), innovation ambidexterity and the…

872

Abstract

Purpose

This paper has predicted digital supply chain (DSC) adoption through the role of firms' proactiveness, knowledge management capability (KMC), innovation ambidexterity and the moderating effect of environmental dynamism.

Design/methodology/approach

Survey data from 354 managers in manufacturing and service firms were analysed using the PLS-SEM model.

Findings

The present study's findings ascertained the significant role of innovation ambidexterity in influencing DSC adoption, given that innovation exploration's direct and mediating impacts were greater than innovation exploitation's. Firms' proactiveness had the highest path coefficient value among the endogenous variables as an indispensable source for firms to successfully embrace KMC and innovation ambidexterity. The role of firm size on DSC adoption was also significant, revealing that SMEs were more likely than larger firms to adopt DSC practices. Despite its significant effect on innovation ambidexterity, KMC surprisingly exhibited no direct influence on DSC adoption. Furthermore, the findings demonstrated the significant moderating role of environmental dynamism on the effect of KMC on innovation exploration.

Research limitations/implications

This research endeavour has presented valuable insights for scholars and managers, furnishing them with a framework to facilitate decision-making processes regarding adopting DSC practices. A key insight gleaned from this study has been the remarkable value of firms' proactive behaviour and innovation ambidexterity in facilitating DSC adoption decisions. Such adoption has empowered organisations to deploy appropriate interventions and allocate resources efficiently, considering the pivotal role of innovation exploration in contrast to the relatively limited impact of innovation exploitation within this context. Managers may also underscore the significance of firm size in shaping DSC adoption decisions. Small- and medium-sized enterprises (SMEs) have been more likely to embrace DSC initiatives than their larger counterparts. The agile scale and streamlined organisational structures of SMEs often translate into faster decision-making processes, allowing for DSC adoption with relative ease. SMEs might also exhibit a greater openness to reap the benefits associated with DSC systems, such as improved operational efficiency and cost reduction.

Originality/value

The present study has advanced DSC adoption research by examining innovation ambidexterity, knowledge management capability and firms' proactiveness. It has also provided valuable insights for scholars and managers, presenting a framework for decision-making processes regarding DSC adoption in an emerging economy context.

Access Restricted. View access options
Article
Publication date: 17 January 2023

Gharib Hashem and Mohamed Aboelmaged

Rapid changes in the global environment and the effects of existing economic issues triggered by COVID-19 and the war in Ukraine have posed several challenges for manufacturing…

544

Abstract

Purpose

Rapid changes in the global environment and the effects of existing economic issues triggered by COVID-19 and the war in Ukraine have posed several challenges for manufacturing firms. A hybrid strategy integrating lean and agile (leagile) systems is viable for firms to enhance their capabilities in such dynamic contexts. This paper examines the critical drivers of leagile manufacturing system adoption in an emerging economy from the technological, organizational and environmental (TOE) perspective.

Design/methodology/approach

A cross-sectional survey is carried out to obtain data from 438 managers working in 219 manufacturing firms. Multiple regression analysis is applied to test the effect of technological, organizational and environmental drivers on the adoption of leagile systems.

Findings

The results show that organization capacity, environmental uncertainty and relative advantage demonstrate the most significant positive relationships with the leagile systems adoption wherein complexity and resistance to change appear to exhibit significant negative associations. Unexpectedly, firm size unveils no significant effect on the adoption of leagile systems.

Practical implications

To deal effectively with critical challenges triggered by ever-changing environment, firms have sought to adopt innovative systems for achieving products' availability in the markets at the right quality and price. A hybrid strategy integrating lean and agile (leagile) systems is viable to enhance a firm's capabilities in such dynamic contexts. The findings of our study help top management and policymakers identify and assess the critical drivers that may facilitate or hinder the successful adoption of leagile systems.

Originality/value

A major trend of studies in the field of manufacturing systems has focused on the critical success factors of adopting either lean or agile systems. Furthermore, research work concerning leagile as a hybrid system focuses primarily on the conceptual development rather than empirical grounds of leagile systems. Given the lack of empirical research in this field, this study offers an early attempt to predict leagile system adoption in an emerging economy. It also contributes to the manufacturing systems research by extending the extant knowledge about the role of firm-level drivers in leagile system adoption from the TOE perspective.

Details

Benchmarking: An International Journal, vol. 30 no. 10
Type: Research Article
ISSN: 1463-5771

Keywords

Access Restricted. View access options
Article
Publication date: 12 February 2025

Islam Elbayoumi Salem, Eslam Ahmed Fathy, Amr Mohamed Fouad, Ahmed Mohamed Elbaz and Mohamed Kamal Abdien

The study scrutinizes the direct and indirect association between absorptive capacity as the independent variable and green innovation adoption and sustainable performance as the…

34

Abstract

Purpose

The study scrutinizes the direct and indirect association between absorptive capacity as the independent variable and green innovation adoption and sustainable performance as the dependent variables. Similarly, the study assessed the mediating role of green innovation adoption between absorptive capacity and sustainable performance. The research also evaluates green organizational culture and environmental regulation as moderators.

Design/methodology/approach

The current study applied partial least squares structural equation modeling (PLS-SEM) and administered a questionnaire to general managers and department directors in 4- and 5-star hotels. Quantitative research was employed as the chosen method.

Findings

The PLS-SEM analysis revealed that absorptive capacity has a positive impact on the adoption of green innovation. Furthermore, each sub-dimension of sustainable performance acts as a partial mediator in this relationship. Also, our study showed that environmental regulations and green organizational culture moderate the link between absorptive capacity and the adoption of green innovation.

Research limitations/implications

The research primarily emphasizes that Oman’s hotel business may limit its applicability to other nations with distinct cultures, economies, legal frameworks for the environment and cultural norms.

Originality/value

To build an integrative and a comprehensive framework, the present work combines resource-based view (RBV) theory, dynamic capabilities (DC) theory and triple bottom line (TBL) theory. This method aims to improve understanding by combining several points of view on resource management, skills, and environmental sustainability.

Details

Journal of Hospitality and Tourism Insights, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2514-9792

Keywords

Access Restricted. View access options
Book part
Publication date: 14 November 2006

Mohamed Abdelbasset Chemingui and Moataz Mostafa El-Said

Abstract

Details

Explaining Growth in the Middle East
Type: Book
ISBN: 978-0-44452-240-5

1 – 10 of 95
Per page
102050