Facilely green synthesis of silver nanoparticles into bacterial cellulose

Li, Zhe; Wang, Lei; Chen, Si; Cao, Feng; Chen, Shiyan; Yin, Na; Yang, Jingxuan; Wang, Huaping; Xu, Yuhong

doi:10.1007/s10570-014-0487-9

Cited by 69 publications

(41 citation statements)

References 41 publications

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“… 46 However, in our case of Ag/BC composites, it could be said that in the moist environment, contributed from both, the BC membrane and the wound exudate, silver ions (Ag + ) are released from the silver nanoparticles that subsequently penetrate into the bacterial cells and interact by damaging the cell membrane. 30 45 , 46 The silver-ion release is favored in our case thanks to the porous channel of the fibrous BC membranes. This is confirmed from the silver release data ( Figure 6 ), wherein fast release of silver is observed in the first 24 h time period.…”

Section: Results and Discussionmentioning

confidence: 71%

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

Pal

Nisi

Stoppa³

et al. 2017

ACS Omega

181

127

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Bacterial cellulose (BC) functionalized with silver nanoparticles (AgNPs) is evaluated as an antimicrobial membrane for wound-healing treatment. A facile green synthesis of silver nanoparticles inside the porous three-dimensional weblike BC network has been obtained by UV light irradiation. AgNPs were photochemically deposited onto the BC gel network as well as they were chemically bonded to the cellulose fiber surfaces. AgNPs with a narrow size distribution along with some aggregates in the BC network were evidenced from the morphological analyses. A highly crystalline nature of the BC membranes was observed in X-ray diffraction measurements, and the presence of metallic silver confirmed the photochemical reduction of Ag+ → Ag0 in Ag/BC composites. Antibacterial activity of the hybrid composites, such as pellicles, performed against the Gram-negative bacteria (Escherichia coli) by disk diffusion and growth dynamics methods showed high bacteria-killing performance. No significant amount of silver release was observed from the Ag/BC pellicles even after a long soaking time. As composite pellicles are preserved in a moist environment that also favors wound recovery, by combining all of these properties the material could be useful in wound-healing treatments.

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Section: Results and Discussionmentioning

confidence: 71%

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

Pal

Nisi

Stoppa³

et al. 2017

ACS Omega

181

127

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“…32,33 In the case of CMCAg1, when AgNO 3 solution was added to the CMC solution, the silver ions initially diffused into the CMC matrix, then they were uniformly and tightly anchored in the CMC-polymer network by many -NH 2 , -COOH, -OH, and -NHCOCH 3 groups on the main chains of CMC via coordination and electrostatic interactions. [34][35][36] When the glucose solution was added to the mixture, the absorbed silver ions were then reduced to silver atoms according to equation 1:…”

Section: Results and Discussion Synthetic Mechanism Of Carboxymethyl mentioning

confidence: 99%

“…35 The oxidation of cellulose primary alcohol to aldehyde or carboxyl groups plays an important role in the reduction of metal ions. 39,40 Without an additional reducing agent, CMC exhibits weak reducing capacity, relying on the partially uncarboxymethylated primary hydroxyl groups.…”

Section: Results and Discussion Synthetic Mechanism Of Carboxymethyl mentioning

confidence: 99%

“…29 These results indicate that Ag + was reduced to Ag 0 and pure well-crystallized metallic silver was formed in all three synthetic protocols. According to the literature, 35 the decreasing characteristic peak intensity of silver in the XRD patterns indicates that the amount of silver in hybrids decreased. Comparison of the diffraction intensity belonging to elemental silver in the XRD patterns of CMC-Ag1, CMC-Ag2, and CMC-Ag3 revealed that the silver content in CMC-Ag1 was the highest and in CMC-Ag3 the lowest.…”

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confidence: 76%

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In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

Huang¹,

Yu²,

Zhang³

et al. 2017

IJN

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In order to fabricate antimicrobial carboxymethyl chitosan–nanosilver (CMC-Ag) hybrids with controlled silver release, this study demonstrated comparable formation via three synthetic protocols: 1) carboxymethyl chitosan (CMC) and glucose (adding glucose after AgNO 3 ), 2) CMC and glucose (adding glucose before AgNO 3 ), and 3) CMC only. Under principles of green chemistry, the synthesis was conducted in an aqueous medium exposed to microwave irradiation for 10 minutes with nontoxic chemicals. The structure and formation mechanisms of the three CMC-Ag hybrids were explored using X-ray diffraction, ultraviolet-visible spectroscopy, transmission electron microscopy, and Fourier-transform infrared analyses. Additionally, antimicrobial activity and in vitro silver release of the three synthesized hybrids were investigated in detail. The results revealed that a large number of stable, uniform, and small silver nanoparticles (AgNPs) were synthesized in situ on CMC chains via protocol 1. AgNPs were well dispersed with narrow size distribution in the range of 6–20 nm, with mean diameter only 12.22±2.57 nm. The addition of glucose resulted in greater AgNP synthesis. The order of addition of glucose and AgNO 3 significantly affected particle size and size distribution of AgNPs. Compared to CMC alone and commercially available AgNPs, the antimicrobial activities of three hybrids were significantly improved. Of the three hybrids, CMC-Ag1 synthesized via protocol 1 exhibited better antimicrobial activity than CMC-Ag2 and CMC-Ag3, and showed more effective inhibition of Staphylococcus aureus than Escherichia coli . Due to strong coordination and electrostatic interactions between CMC and silver and good steric protection provided by CMC, CMC-Ag1 displayed stable and continuous silver release and better performance in retaining silver for prolonged periods than CMC-Ag2 and CMC-Ag3.

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“…Acticoat™ and Bactigras™ (Smith & Nephew), Aquacel™ (ConvaTec), PolyMem Silver™ (Aspen), and Tegaderm™ (3M) are representative biocomposites modified with ionic silver and approved by the United States (US) Food and Drug Administration (FDA) for wound-dressing applications. In addition to these commercial products, promising results were reported with respect to the incorporation of AgNPs within novel and naturally derived biomaterials for enhanced wound-healing management, such as (but not limited to) modified cotton fabrics [ 179 , 180 ], bacterial cellulose [ 181 , 182 ], chitosan [ 176 , 183 ], and sodium alginate [ 184 , 185 ].…”

Section: Silver Nanoparticles For Wound Healingmentioning

confidence: 99%

Biomedical Applications of Silver Nanoparticles: An Up-to-Date Overview

et al. 2018

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During the past few years, silver nanoparticles (AgNPs) became one of the most investigated and explored nanotechnology-derived nanostructures, given the fact that nanosilver-based materials proved to have interesting, challenging, and promising characteristics suitable for various biomedical applications. Among modern biomedical potential of AgNPs, tremendous interest is oriented toward the therapeutically enhanced personalized healthcare practice. AgNPs proved to have genuine features and impressive potential for the development of novel antimicrobial agents, drug-delivery formulations, detection and diagnosis platforms, biomaterial and medical device coatings, tissue restoration and regeneration materials, complex healthcare condition strategies, and performance-enhanced therapeutic alternatives. Given the impressive biomedical-related potential applications of AgNPs, impressive efforts were undertaken on understanding the intricate mechanisms of their biological interactions and possible toxic effects. Within this review, we focused on the latest data regarding the biomedical use of AgNP-based nanostructures, including aspects related to their potential toxicity, unique physiochemical properties, and biofunctional behaviors, discussing herein the intrinsic anti-inflammatory, antibacterial, antiviral, and antifungal activities of silver-based nanostructures.

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Facilely green synthesis of silver nanoparticles into bacterial cellulose

Cited by 69 publications

References 41 publications

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release

Biomedical Applications of Silver Nanoparticles: An Up-to-Date Overview

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Facilely green synthesis of silver nanoparticles into bacterial cellulose

Cited by 69 publications

References 41 publications

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

Silver-Functionalized Bacterial Cellulose as Antibacterial Membrane for Wound-Healing Applications

In situ green synthesis of antimicrobial carboxymethyl chitosan&ndash;nanosilver hybrids with controlled silver release

Biomedical Applications of Silver Nanoparticles: An Up-to-Date Overview

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In situ green synthesis of antimicrobial carboxymethyl chitosan–nanosilver hybrids with controlled silver release