Environmentally sound approach for imparting antibacterial and UV-protection functionalities to linen cellulose using ascorbic acid

Ibrahim, Nabil A.; Eid, Basma M.; El-Zairy, E.M.R.; Emam, El-Amir M.; Barakat, Soliman

doi:10.1016/j.ijbiomac.2019.05.113

Cited by 20 publications

(15 citation statements)

References 35 publications

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“…The slight shift of the elemental and atomic weight percentage (Table 1) of both carbon and oxygen in the pure sample (BC) in comparison is logically indicating the presence of CA in all modi ed samples. CA having the chemical formula (C 6 H 8 O 7 ), have added to/compensated the percentage of oxygen atoms in the pure BC having the chemical formula (C 6 H 10 O 5 ) n , thus reducing the proportion of carbon and increasing that of oxygen, similar to the trend reported for ascorbic acid modi cation on cellulose by [42].…”

Section: Scanning Electron Microscopy (Sem/edx)supporting

confidence: 54%

Catalyst-Free Crosslinking Modification of Nata-De-Coco-Based Bacterial Cellulose Nanofibers Using Citric Acid

Salihu

Razak

Zawawi

et al. 2021

Preprint

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Bacterial cellulose (BC) has gained research attention in materials science and biomedicine due to its fascinating properties. BCs' fiber collapse phenomenon (inability to reabsorb water after dehydration) is one of the drawbacks that limit its potentials. To overcome this, a catalyst-free thermal crosslinking reaction was employed to modify the BC using citric acid (CA) without compromising the biocompatibility. Properties evaluation of the modified BC (MBC) by FTIR, XRD, SEM/EDX, TGA, and Tensile analysis confirmed the fiber crosslinking and improvement of some properties that could be advantageous for various applications. The modified nanofiber seems to maintain its inherent crystallinity and thermal stability with an increased water absorption/swelling and tensile modulus. The resulting MBC reported here can be relevant for wound dressings and tissue scaffolding.

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Section: Scanning Electron Microscopy (Sem/edx)supporting

confidence: 54%

Catalyst-Free Crosslinking Modification of Nata-De-Coco-Based Bacterial Cellulose Nanofibers Using Citric Acid

Salihu

Razak

Zawawi

et al. 2021

Preprint

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“…The significant increase in N%, K/S , UPF, and ZI values is the synergistic effect of binder, crosslinker, as well as softening agents incorporated into the printing formulation (along with the bioactive material and green pigment colourant) in enhancing the film‐forming properties. This effect via mechanical and physico‐chemical interactions helps in the formation of a three‐dimensional network for subsequent fixation and accommodation of pigment molecules and bioactive agent constituents within the crosslinker‐binder/fabric matrix during the thermofixation step under acidic conditions 6,18,32‐39 . according to the following scheme of reaction (Scheme 1).…”

Section: Resultsmentioning

confidence: 99%

Durable surface functionalisation and pigment coloration of cellulosic fabrics using bioactive additives

Ibrahim

El-Zairy

Eid

et al. 2021

Coloration Technology

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The main goal of this study is to develop a facile eco‐friendly method for antibacterial/ultraviolet (UV)‐blocking functionalisation using various green bioactive functional additives namely neem, jojoba, argan, aloe vera, ginger, and tulsi. In addition, pigment coloration of cellulosic substrates including cotton, viscose, cotton/viscose, and cotton/linen using pigment colourants and appropriate printing auxiliaries in one step was used. The experimental results revealed that the durability, improvement in the imparted antibacterial/UV‐blocking functional properties and enhancement in the depth of the obtained pigment prints followed a decreasing order: tulsi > ginger > aloe vera > argan > jojoba > neem ≫ none, keeping other parameters constant. The obtained data also demonstrated that the developed pigment prints exhibited remarkable functionalities and depth of shade after 15 washing cycles. Moreover, it was observed that improvement in the imparted functional and coloration properties were a function of types of cellulosic substrate and the kind of colourant. Scanning electron microscopy (SEM), and energy‐dispersive X‐ray spectroscopy (EDX) analysis for selected samples confirmed the surface modification, morphology changes and immobilisation of the used active ingredients onto the treated substrates.

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“…The latter interact with negatively charged residue on the surface of bacteria; such interaction causes extensive changes in the cell surface and cell permeability leading to leakage of intercellular substances. In this way, the growth of bacterial species is hindered and, finally, leads to the death of these cells (Mostafa and El-Sanabary, 2020; Zhao et al , 2011; Ibrahim et al , 2019; Morsy et al , 2019; Mostafa et al , 2020).…”

Section: Antibacterial Activitymentioning

confidence: 99%

“…bacteria, fungi and viruses to growth and reproduction. Moreover, antimicrobial agents can be approximately classified into organic and inorganic materials in addition to immobilized enzymes at which some of these antimicrobial agents have negative impacts on both the textile consumer and the environment especially water pollution (Ibrahim et al , 2019). Moreover, viscose fabric has a tendency to some shortcomings especially with wrinkle recovery angles along with poor smooth drying properties after laundering.…”

Section: Introductionmentioning

confidence: 99%

“…The rupture and reformation of hydrogen bonds cause wrinkle problems on viscose fabrics (Rajaj, 2002). Recently, much interest has been given to antimicrobial and crosslinking agent based on safe and echo friendly compounds and their potential applications in textile finishing to develop multifunctional textiles with minimal environmental impacts (Ibrahim et al , 2019; Holme, 2007; Lam et al , 2012).…”

Section: Introductionmentioning

confidence: 99%

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Alternative microwave curing approach for imparting ease and care characteristics and antimicrobial activity to viscose fabric

Mostafa

El-Sanabary

2020

PRT

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Purpose This study aims to use multi-functional viscose fabric that was facilely developed with with respect to ease and care characteristics, reinforcement effect and antibacterial activity by using novel echo friendly antibacterial finish based on citric acid/sodium hypophosphite and the authors’ previously tailor-made poly meth acrylic acid (MAA)-chitosan graft copolymer via alternative microwave curing approach instead of traditional high-temperature cure one. Design/methodology/approach Viscose fabric was paddled twice in the cross-linking formulations containing different concentrations of citric acid, poly (MAA)-chitosan graft copolymer and sodium hypophosphite to 90 % wet pick up and dried at 100°C for 3 min in an electric oven. Then, the treated fabrics were placed on the disk spinner of the microwave oven and cured at different power (100–800 Watt) for various durations (60–180 s). The fabric was then water-rinsed and dried at ambient condition before use. Findings Results revealed that the above echo friendly method for finished viscose fabrics was found to achieve relatively high dry wrinkle recovery angle and maintain the loss in tensile strength within the acceptable range, as well as antibacterial activity against Escherichia coli and Staphylococcus aureus as a gram-negative and gram-positive bacteria, respectively; in addition to durability up to ten washing cycles. Furthermore, scanning electron microscope images, nitrogen content and add on % of the finished fabric confirmed the penetration of grafted chitosan inside the fabric structure. The tentative mechanism for these reactions is advocated. Originality/value The novelty addressed here is undertaken with the advantages of using citric acid as a nonformaldehyde, safe and cheap poly carboxylic acid as a crosslinking agent and sodium hypophosphite as a potential catalyst, in addition to the authors’ noncitable multifunctional echo friendly tailor-made poly (MAA)-chitosan graft copolymer for imparting reinforcement and antibacterial characteristics to viscose fabric that uses the pad-dry/cure microwave fixation for progressively persuaded heat within the fabric during curing. Research limitations/implications This was done to see the impact of microwave as green and efficient tool with respect to reduction in organic solvents, chemicals and exposer time as well as fixation temperature on the finishing reaction in comparison with traditional pad-dry-cure method. Practical implications Poly (MAA)-chitosan graft copolymer as amphoteric biopolymer was expected to impart multifunctional properties to viscose fabrics especially with comparable dry wrinkle recovery angle and minimize the loss in tensile strength in addition to antibacterial properties in comparison with untreated one.

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Environmentally sound approach for imparting antibacterial and UV-protection functionalities to linen cellulose using ascorbic acid

Cited by 20 publications

References 35 publications

Catalyst-Free Crosslinking Modification of Nata-De-Coco-Based Bacterial Cellulose Nanofibers Using Citric Acid

Catalyst-Free Crosslinking Modification of Nata-De-Coco-Based Bacterial Cellulose Nanofibers Using Citric Acid

Durable surface functionalisation and pigment coloration of cellulosic fabrics using bioactive additives

Alternative microwave curing approach for imparting ease and care characteristics and antimicrobial activity to viscose fabric

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