Naser Gad Ahmed Al-Balakocy
@scholar.google.com
National Research Centre - Proteinic and Man-made Fibers Department
Prof Dr / Textile technology and Research Institute
RESEARCH INTERESTS
Chemistry and technology of man-made fibers
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Osama M. Darwesh, Naser G. Al-Balakocy, Ahmed Ghanem, and Ibrahim A. Matter
Springer Science and Business Media LLC
AbstractPolyester/cotton (PET/C) blended fabric wastes are produced daily in huge amounts, which constitutes an economic loss and an environmental threat if it is not reused appropriately. Modern textile waste recycling technologies put much effort into developing fabric materials with unique properties, such as bioactivity or new optical goods based on modern technologies, especially nano-biotechnology. In this study, zinc oxide nanoparticles (ZnO-NPs) were biosynthesized using the aqueous extract of Dunaliella sp. and immobilized on PET/C waste fabrics after enzymatically activated with cellulases. The produced Dunaliella-ZnO-NPs (10–20 nm with a spherical shape) were characterized by High-resolution transmission electron microscopy (HRTEM), Fourier-transform infrared spectroscopy (FTIR), X-Ray diffraction analysis (XRD), and Scanning electron microscopy-energy dispersive X-ray analyzer (SEM-EDAX), and some functional groups, such as CH, CO, NH, and CN (due to the presence of carboxyl, proteins and hydroxyl groups), were detected, revealing the biosynthesis of ZnO-NPs. The analysis showed that the resulting ZnO-NPS had potent antimicrobial effects, Ultraviolet (UV) protection capabilities, and no cytotoxic effects on the normal human fibroblast cell line (BJ1). On the other hand, enzymatic treatments of PET/C fabric waste with cellulases enhanced the immobilization of biosynthetic nanoparticles on their surface. Modified PET/C fabrics loaded with Dunaliella-ZnO-NPs showed antibacterial and UV protection capabilities making them an eco-friendly and cost-effective candidate for numerous applications. These applications can include the manufacture of active packaging devices, wastewater treatment units, and many other environmental applications. Graphical abstract
Hend Ahmed, Meram S. Abdelrahman, Naser G. Al-Balakocy, Zhen Wen, and Tawfik A. Khattab
Springer Science and Business Media LLC
AbstractPhotochromic and photoluminescent clothes can be described as smart textiles that alter their color and emission spectra upon exposure to a light stimulus. Recycled nonwoven polyester fabrics screen-printed with rare-earth strontium aluminate nanoparticles were developed to introduce photochromic and photoluminescent properties. Both spinning and preparation of nonwoven fibrous mat was performed industrially starting from recycled polyester waste. Aqueous-based phosphor-binder nanocomposites containing different concentrations of inorganic phosphor with excellent thermal and photostability were applied directly onto nonwoven polyester fabrics. The screen-printing process produced a uniform photochromic and photoluminescent film onto the nonwoven polyester surface that showed strong green emission color (440 nm) under UV light even at lower phosphor concentrations (0.5 wt%) in the printing paste. The excitation wavelength of the printed nonwoven polyester samples was monitored at 382 nm. Long-persistent greenish-yellow phosphorescence was detected in the dark at higher phosphor concentrations. The morphological microscopic data of phosphor nanoparticles and printed nonwoven polyester fabrics were collected using various analytical methods. TEM analysis of phosphor nanoparticles designated diameters of 4–11 nm, whereas XRD analysis indicated a crystal size of 9 nm. The printed cloth exhibited a quick and reversible photochromic emission when exposed to ultraviolet light. The ultraviolet protection, antimicrobial and superhydrophobic properties were improved with increasing the pigment concentration in the printing paste. The static contact and slide angles improved in the ranges of 108.6°–132.6°, and 12°–7°, respectively. The effects of increasing the phosphor concentration in the printing paste on the comfort features and colorfastness were examined.
Naser G. Al‐Balakocy, Meram S. Abdelrahman, Hend Ahmed, Abdelrahman A. Badawy, Ahmed F. Ghanem, Ahmed R. Wassel, Zhen Wen, and Tawfik A. Khattab
Wiley
Smart windows with long-persistent phosphorescence, UV protection, high transparency, and high rigidity were developed by easily immobilizing varying ratios of lanthanide-activated aluminate phosphor nanoscale particles within a composite of recycled polyester/cellulose nanocrystals (RPET/CNC). Cellulose nanocrystals were prepared from rice straw waste. Cellulose nanocrystals were used at low concentration as both crosslinker and drier to improve both transparency and hardness. The phosphor nanoscale particles must be distributed into the recycled polyester/cellulose nanocrystals composite bulk without agglomeration in order to produce transparent RPET/CNC substrates. Photoluminescence characteristics were also studied by using spectroscopic profiles of excitation/emission and decay/lifetime. The hardness efficiency was also examined. This transparent recycled polyester waste/cellulose nanocrystals nanocomposite smart window has been shown to change color under UV light to strong green and to greenish-yellow when it is dark, as proved by CIE Lab color parameters. It was found that the afterglow RPET/CNC smart window had phosphorescence intensities of 428, 493 and 523 nm upon excitation at 368 nm. There were evidences of improved UV shielding, photostability, and hydrophobic activity. In the presence of low phosphor ratio, the luminescent RPET/CNC substrates showed quick and reversible fluorescent photochromic activity when exposed to UV radiation.
NG Al-Balakocy, TM Hassan, SY Aly, SH Abd Elsalam, and Mahmoud Hamouda Elshakankery
SAGE Publications
This article, discuss the effect of finishing polyester/cotton blended fabric (PET/C) with alkali and Titanium dioxide nanoparticles (TiO2 NPs) simultaneously. The treatment conditions such as NaOH and TiO2 NPs concentrations, reaction temperature and duration will be investigated. The effect of addition NPs on alkaline treatment conditions will prove through weight loss and carboxylic content. The ability of PET/C fabrics for loading with NPs during alkaline treatment was investigated by using SEM, EDX, and FTIR measurements. The effect of finishing of PET/C blended fabric with the suggested method on antimicrobial activity and ultraviolet protection was investigated. The simultaneous finishing of PET/C blended fabrics with alkali and TiO2 NPs showed excellent ultraviolet protection and high antimicrobial activity against Gram-positive ( Bacillus mycoides), Gram-negative ( Escherichia coli), and nonfilamentous fungus ( Candida albicans). The functional performance imparted to PET/C fabrics by the suggested approach are durable in repeated laundering processes, even after five Launder-Ometer washes.
Ali M. Elshafei, Abdelmageed M. Othman, Maysa A. Elsayed, Naser G. Al-Balakocy, and Mohamed M. Hassan
Elsevier BV
N. Al-Balakocy, T. Hassan, Safaa Khalil and S. El-Salam
Samy E Shalaby, Naser Gad Al-Balakocy, Margrita K Beliakova, and Abdelmageed M Othman
SAGE Publications
The present work aims at investigating the effect of applying different dyeing sequences on the imparted functional properties to partially hydrolysed and bleached PET and PET/CO fabrics loaded with TiO2, ZnO and SnO2 nanoparticles (NPs). The so obtained dyed fabrics have been characterized using SEM, EDX and FT-IR analytical techniques. The obtained results revealed that, an interaction has taken place between COOH groups created on dyed polyester fabrics and each of the applied NPs. Moreover, the effect of loading and sequence of dyeing wet operation on the functional performances of polyester fabrics was evaluated by estimating its antimicrobial efficacy and ultraviolet protection properties. The antimicrobial activity was tested against B. mycoides, E. coli and C. albicans. It has been found that, loading polyester fabrics with TiO2 and ZnO during dyeing process using exhaustion or after dyeing using pad-dry-cure methods paves the way for imparting outstanding antimicrobial activity even after five washing cycles. Moreover, the obtained results have also reviled that, the UPF values are dependent on the sequences of the loading of abovementioed NPs during or after dyeing wet operation.
Abdelmageed M. Othman, Maysa A. Elsayed, Naser G. Al-Balakocy, Mohamed M. Hassan, and Ali M. Elshafei
Elsevier BV
Abdelmageed M. Othman, Maysa A. Elsayed, Naser G. Al-Balakocy, Mohamed M. Hassan, and Ali M. Elshafei
Springer Science and Business Media LLC
In the publication of this article [1], the title of Figure 6 was missing. The original article has been corrected.
Rafaat Abbas, Naser Al-Balakocy, E. M Khalil, and Samy Shalaby
Egypts Presidential Specialized Council for Education and Scientific Research
In the present work, a novel method was designed to develop an efficient and generally applicable technique for the creation of quaternary ammonium groups in nylon-6 macromolecules via polymerization of 2-methacryloxy ethyltrimethyl ammonium chloride (VQAs) in the presence of nylon-6 nonwoven fabrics using potassium persulphate (K2S2O8) as initiator. In addition factors affecting the extent and rate of polymerization (Rp) were investigated and the apparent activation energy was calculated. The reaction mechanism was suggested. Characterization of the grafted with PVQAs Nylon-6 nonwoven fabrics was investigated by X-ray, SEM, and FT-IR.
Naser Gad Al-Balakocy, Samiha M Abo El-Ola, Eman A Mwafy, and Magda A EL-Bendary
SAGE Publications
This article introduce a novel, convenient and efficient finishing approach for the creation of quaternary ammonium groups (QAGs) into polyamide-6 (PA-6) macromolecules via polymerization of vinyl monomer is named methacryloyloxyethyl trimethyl ammonium chloride (MAETAC). The graft copolymerization reaction proceeds in the presence of nano-metal oxides TiO2, ZnO and its hybrid mixture. The finishing method of PA-6 fabrics was carried out by using pad-dry-cure technique in presence K2S2O8 as initiator. The reaction mechanism was suggested. The surface topography was studied using Scan Electron Microscope (SEM) and Energy dispersive X-Ray (EDX). Evidence the chemical bonding between poly (MAETAC) and amide groups as well as the ionic interaction between nanoparticles (NPs) and carboxylic end groups in the chemical structure of the PA-6 fabrics were confirmed by FT-IR. The antimicrobial activity of the finished fabrics were evaluated against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans. The achieved antimicrobial functions on the PA-6 fabrics are durable in repeated laundering processes. Even after laundering five times the PA-6 fabrics treated with QAs/Ti NPs could still provide 32%, 80.7%, 22.6%, and 60.5%, while PA fabrics treated with QAs/Zn or QAs/(Ti+Zn) showed excellent antimicrobial activity against Staphylococcus aureus, E. coli, P. aeruginosa, and C. albicans before laundering, respectively. Also, it has been found that, PA-6 fabrics finished with the suggested method even after five washing cycles, displayed excellent ultraviolet protection effectiveness. The results of mechanical properties showed that this finishing approach had not destructive effect on the physical properties of the fabrics.
Samy Shalaby, Naser Al-Balakocy, Yasser Ibrahium, Samiha Abo El -Ola, and margrita bilyakova
Egypts Presidential Specialized Council for Education and Scientific Research
The present work aims to assess the effectiveness of Nylon-6 nonwoven fabrics containing antimicrobial substance (AS) and grafted with poly methacrylic acid (PMAA), polydimethylaminoethylmerthacrylate (PDMAEMA) and the blended fabric containing the above mentioned two types of nonwoven fabrics for air and gas filtration. The efficiency of the textile filters on the removal of anions and cations pollutants from the atmosphere of the selected indoor sites were studied under the normal conditions in the indoor environment. Air samples were collected before and after fitting the three tested types of textile nonwoven filters. The absorption method was used for collecting the gaseous pollutants, SO2, NO2 and NH3, before and after filtration. The removal efficiency % of each filter was calculated. Nonwoven fabric containing 1:1wt/wt from two types of nonwoven fabrics showed high removal efficiency when applied for the collection of suspended anion and cation particulates. Key words:
Abdelmageed M. Othman, Maysa A. Elsayed, Naser G. Al-Balakocy, Mohamed M. Hassan, and Ali M. Elshafei
Springer Science and Business Media LLC
Abstract Background The present study aims to apply an efficient eco-friendly and inexpensive process for green synthesis of silver nanoparticles (AgNPs) through the mediation of fungal proteins from Aspergillus fumigatus DSM819, characterization, and its application as antimicrobial finishing agent in textile fabrics against some infectious microorganisms. Results Optimum conditions for AgNP biosynthesis could be achieved by means of using 60% (v/v) of cell-free filtrate (CFF) and 1.5 mM of AgNO3 at pH 10.0 after 90 min. The obtained AgNPs were of spherical shape with 90% of distribution below than 84.4 nm. The biosynthesized AgNPs exerted an antimicrobial activity against the studied pathogenic microorganisms (E. coli, B. mycoides, and C. albicans). In addition, IC50 values against in vitro tumor cell lines were found to be 31.1, 45.4, 40.9, and 33.5 μg/ml for HCT116, A549, MCF7, and PC3, respectively. Even with a very low concentration (0.25%), the treated PET/C fabrics by AgNPs exerted an antimicrobial activity against E. coli, B. mycoides, and C. albicans to give inhibition zone diameter of 15, 15, and 16 mm, respectively. Conclusions The green biosynthesis approach applied in this study is a non-toxic alternative to the traditional chemical and physical methods, and would be appropriate for biological large-scale production and prospective treatments. Graphical abstract
Samy Elsebaie Shalaby, Naser Gad Ahmed Al-Balakocy, Samiha Mohammed Abo El-Olaa, and Margarita Konstantinovna Beliakova
Desalination Publications
The present work aims to assess: (a) The effectiveness of nylon nonwoven fabrics containing antimicrobial substance and grafted with PMAA, PDMAEMA and the blended fabric containing the above mentioned two types of nonwoven fabrics for metal ions (Cu2+, Pb2+) and chromate (Cr2O7) 2– recovery from wastewater; (b) The amount of the ion-exchanger used; and (c) The desired quality of product water (breakthrough point) on the operating capacity of textile under investigation. The main objective of this study is to investigate the possibilities of the final effluent in order to comply with the National Environmental Regularity standard for wastewater discharge into the public sewage network. The Cu2+and Pb2+ removal efficiency by the above mention textile types was studied by batch adsorption and column runs methods. It was found, in case of applying batch adsorption method that, the maximum removal of Cu2+ (92%) takes place when nylon grafted with PMAA nonwoven fabric was used. The application of blended nonwoven grafted with PMAA and PDMAEMA fabric paves the way for high sorption (79%) of Cu2+ from wastewater. The Cu2+ removal with grafted with PDMAEMA nonwoven fabric slightly increased relative to control fabric. The maximum ion removal % of Pb2+ (80–82%) was attained upon using all three types of grafted textiles, irrespective of the types of grafted polymer. Column method was used for determination of Cu2+ and Pb2+ removal efficiency by using the three types of grafted nylon-6 nonwoven fabrics. The copper and lead free effluents, breakthrough points and breakthrough capacities for the ion-exchangers under investigation were obtained Chromate removal efficiency by using Nylon non woven antimicrobial fabrics grafted with PDMAEMA was studied. For this anion exchanger fabric chromate free effluent, chromate breakthrough point and breakthrough capacity were also obtained.
Samy Shalaby, Naser Al-Balakocy, Samiha Abo El -Ola, and margrita bilyakova
Egypts Presidential Specialized Council for Education and Scientific Research
In this work an affective and simple technology for pilot scale production of grafted Nylon-6 fibers with Polydimethylaminoethylmathacrylate (PDMAEMA) for ion exchange application is suggested. This technology consists of the creation of antimicrobial substance (AS) in Nylon-6 fibers followed by grafting with dimethylaminoethylmathacrylate (DMAEMA) using Cu2+-K2S2O8 redox system. Factors affecting the yield of grafted PDMAEMA were investigated and the optimal conditions for grafting process were evaluated. The availability of modified Nylon-6 fibers grafted with PDMAEMA as polymer sorbent for removal of cations as Cu+2, Pb+2 and anions Cr2O7-2, SO4-2 was investigated. The influence of various adsorption parameters on the degree of extraction (R %) and adsorption capacity (SC mg/g) was calculated.
Samy Shalaby, Samiha Abo El -Ola, Naser Al-Balakocy, Margrita Bilyakova, and Rafaat Abas
Egypts Presidential Specialized Council for Education and Scientific Research
Removing the hazardous metals from wastewater especially industrial drainage is very important for preventing health problems in human beings, plants and animals. The ion exchanger has constructed as primary line of safeguards for that goal. In this study grafted polyamide-6 (PA-6) fibers with polymethacrylic acid (PMAA) was used as materials for the ion exchangers. Grafting was achieved under required time and temperature and the factors affecting the graft process were studied. The efficiency of the grafted fibers for adsorption of Cu2+, Pb2+ and Cr6+ was evaluated. The effect of adsorption parameters such as pH, duration of adsorption, initial ion concentration and the adsorption temperature on the degree of extraction (R %) and adsorption capacity (SC, mg/g) was studied. Optimization the conditions for the preparation on laboratory scale, adjustment and adaptation of these conditions to suit the production of these grafted fibers on pilot scale was accomplished.
Hussein Abou-Yousef, Tawfik A. Khattab, Yehia A. Youssef, Naser Al-Balakocy, and Samir Kamel
Elsevier BV
Samy Shalaby, naser gad, Samiha Abo El-Ola, margrita bilyakova, and Ali Elshafei
Egypts Presidential Specialized Council for Education and Scientific Research
The present article investigates the effect of finishing wet operations on functional properties imparted to bleached and partially hydrolyzed PET fabrics by loading with TiO2, ZnO and SnO2 nanoparticles. Different trials have been carried out to clarify the effect of the sequences of finishing wet process on the properties of loaded with nanoparticles PET fabrics. Characterization of the so finished fabrics was carried out through SEM, EDX and FT-IR. EDX and FT-IR have confirmed that, interaction has actually taken place between carboxylic groups created on PET fabrics and each of the applied nanoparticles. Moreover, the obtained data revealed that, the finishing wet operation has no effect on the abovementioned interaction. The effect of finishing wet operation on the functional performances of PET fabrics was evaluated by analyzing its antimicrobial activity and ultraviolet protection properties. The antimicrobial activity was tested against B. mycoides, E. coli and C. albicans. It has been found that, loading PET fabrics with TiO2 and ZnO during or after carrying final finishing process using pad-dry-cure method paves the way for imparting outstanding antimicrobial activity even after five washing cycles. Also the obtained results revealed that, the sequence of loading the applied NPs before or during or after carrying finishing wet operation highly affect the UPF values.
Hussein Abou-Yousefa and naser gad
Egypts Presidential Specialized Council for Education and Scientific Research
One of big challenges in Egyptian pulp and paper sector is the exploring of new prospective for development and improvement the properties of paper made from Kraft bagasse pulp. The study utilized polyethylene terephathalate (PET) as reinforcement to the pulp made from Kraft bagasse to improve the paper properties. Increasing of the computability between PET fibers and Kraft pulp could be achieved by different partial hydrolysis processes for PET with sodium hydroxide, sulphuric acid, or ethanol amine. Optimum pretreatment conditions for different types of partial hydrolysis were identified to be used in formation of blended paper sheets with Kraft bagasse pulp. The study has investigated the effect of kind of pretreatment and concentration of PET on the mechanical, moisture uptake, and thermal aging for blended paper sheets made from PET fibers and Kraft pulp. The blended paper sheets using alkali pretreated PET manifested superior mechanical, thermal, and moisture resistance properties in comparison with paper sheets manufactured from blending with acidic, or amine pretreated PET.