Cellulose–Silver Composites Materials: Preparation and Applications

Salama, Ahmed; Abou-Zeid, Ragab E.; Owda, Medhat E.; Cruz‐Maya, Iriczalli; Guarino, Vincenzo

doi:10.3390/biom11111684

Cited by 52 publications

(30 citation statements)

References 166 publications

(187 reference statements)

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“…Films prepared from cellulose nanofibrils are commonly brittle, which may limit its application. Various additives have been proposed to increase the ductility of nanocellulose films [92]. Among these, the impact of polyethylene glycol on both flexibility and film strength was investigated, as was its effect on the morphology and physical properties of nanocellulose films.…”

Section: Membranes and Bacterial Growth Inhibitionmentioning

confidence: 99%

Cellulose Amphiphilic Materials: Chemistry, Process and Applications

et al. 2022

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In the last decade, amphiphilic cellulose (AC) is emerging as attractive biomaterial for different therapeutic use, due to its unique chemical and physical properties. Using it as alternative to synthetic polymers, AC opens up new avenues to prepare new bio-sustainable materials with low impact in the cellular environment. Herein, most recent methods to synthesize and processing AC materials from different sources—i.e., cellulose nanofibers, bacterial cellulose, cellulose derivatives—will be discussed. By an accurate optimization of morphology and surface chemistry, it is possible to develop innovative amphiphilic platforms, promising for a wide range of biomedical applications, from drug delivery to molecular/particle adsorption.

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Section: Membranes and Bacterial Growth Inhibitionmentioning

confidence: 99%

Cellulose Amphiphilic Materials: Chemistry, Process and Applications

et al. 2022

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“…Several techniques have been used to formulate textiles with AgNPs: the in situ thermal reduction, sonication, padding, dip-coating, spray, exhaustion, layer-by-layer, and electrospinning. However, numerous studies reported the potential uncontrolled leaching behavior of AgNPs, becoming a relevant environmental and health problem [ 9 , 10 , 11 ]. There is a need for new strategies to increase the stability of AgNPs on the fabrics.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Silver Nanoparticles on Polyester Fabric Using Organo-Matrices for Controlled Antimicrobial Performance

et al. 2022

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Antimicrobial textiles are helpful tools to fight against multidrug-resistant pathogens and nosocomial infections. The deposition of silver nanoparticles (AgNPs) onto textiles has been studied to achieve antimicrobial properties. Yet, due to health and environmental safety concerns associated with such formulations, processing optimizations have been introduced: biocompatible materials, environmentally friendly agents, and delivery platforms that ensure a controlled release. In particular, the functionalization of polyester (PES) fabric with antimicrobial agents is a formulation in high demand in medical textiles. However, the lack of functional groups on PES fabric hinders the development of cost-effective, durable systems that allow a controlled release of antimicrobial agents. In this work, PES fabric was functionalized with AgNPs using one or two biocompatible layers of chitosan or hexamethyldisiloxane (HMDSO). The addition of organo-matrices stabilized the AgNPs onto the fabrics, protected AgNPs from further oxidation, and controlled their release. In addition, the layered samples were efficient against Staphylococcus aureus and Escherichia coli. The sample with two layers of chitosan showed the highest efficacy against S. aureus (log reduction of 2.15 ± 1.08 after 3 h of contact). Against E. coli, the sample with two layers of chitosan showed the best properties. Chitosan allowed to control the antimicrobial activity of AgNPs, avoid the complete loss of AgNPs after washings and act in synergy with AgNPs. After 3 h of incubation, this sample presented a log reduction of 4.81, and 7.27 of log reduction after 5 h of incubation. The antimicrobial results after washing showed a log reduction of 3.47 and 4.88 after 3 h and 5 h of contact, respectively. Furthermore, the sample with a final layer of HMDSO also presented a controlled antimicrobial effect. The antimicrobial effect was slower than the sample with just an initial layer of HMDSO, with a log reduction of 4.40 after 3 h of incubation (instead of 7.22) and 7.27 after 5 h. The biocompatibility of the composites was confirmed through the evaluation of their cytotoxicity towards HaCaT cells (cells viability > 96% in all samples). Therefore, the produced nanocomposites could have interesting applications in medical textiles once they present controlled antimicrobial properties, high biocompatibility and avoid the complete release of AgNPs to the environment.

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“…Although Cu is a more sustainable alternative, Ag is more resistant to oxidation. There are several examples in the literature of conductive composites and inks containing NC and Ag, and we have summarized the most relevant ones in Table 1 [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. In [ 10 ], stable silver nanoparticles (Ag NPs) were synthesized using dialdehyde cellulose nanocrystal (DACNC) as both a reducing and stabilizing agent to be used as an antibacterial additive in paper-based food packaging.…”

Section: Introductionmentioning

confidence: 99%

Use of Nanocellulose to Produce Water-Based Conductive Inks with Ag NPs for Printed Electronics

Martínez-Crespiera

Pepió

González-Gil

et al. 2022

IJMS

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The need for more sustainable printed electronics has emerged in the past years. Due to this, the use of nanocellulose (NC) extracted from cellulose has recently been demonstrated to provide interesting materials such as functional inks and transparent flexible films due to its properties. Its high specific surface area together with the high content of reactive hydroxyl groups provide a highly tailorable surface chemistry with applications in ink formulations as a stabilizing, capping, binding and templating agent. Moreover, NC mechanical, physical and thermal properties (high strength, low porosity and high thermal stability, respectively) provide an excellent alternative for the currently used plastic films. In this work, we present a process for the production of water-based conductive inks that uses NC both as a template for silver nanoparticles (Ag NPs) formation and as an ink additive for ink formulation. The new inks present an electrical conductivity up to 2 × 106 S/m, which is in the range of current commercially available conductive inks. Finally, the new Ag NP/NC-based conductive inks have been tested to fabricate NFC antennas by screen-printing onto NC-coated paper, demonstrating to be operative.

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Cellulose–Silver Composites Materials: Preparation and Applications

Cited by 52 publications

References 166 publications

Cellulose Amphiphilic Materials: Chemistry, Process and Applications

Cellulose Amphiphilic Materials: Chemistry, Process and Applications

Stabilization of Silver Nanoparticles on Polyester Fabric Using Organo-Matrices for Controlled Antimicrobial Performance

Use of Nanocellulose to Produce Water-Based Conductive Inks with Ag NPs for Printed Electronics

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