Preparation of a Conductive Cellulose Nanofiber-reinforced PVA Composite Film with Silver Nanowires Loading

Widyaningrum, Bernadeta Ayu; Amanda, Putri; Pramasari, Dwi Ajias; Ningrum, Riska Surya; Kusumaningrum, Wida Banar; Kurniawan, Yudhi Dwi; Amenaghawon, Andrew N.; Darmokoesoemo, Handoko; Kusuma, Heri Septya

doi:10.1016/j.nanoso.2022.100904

Cited by 11 publications

(6 citation statements)

References 63 publications

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“…This evidence confirms the active role of TOCNF in reducing Ag + ions, probably also by means of the introduced carboxylic groups, which, however, are still present in both the TOC-Ag and TOCNF-Ag products. Moreover, the stretching band of the OH group between 3200 and 3500 disappears after AgNP-loading in TOC and TOCNF, confirming that the interaction and fixing of nanoparticles on the cellulosic structure highly involve the alcoholic groups of the glucopyranose units, as also reported for other nanocellulose-based composites …”

Section: Resultssupporting

confidence: 91%

“…Moreover, the stretching band of the OH group between 3200 and 3500 disappears after AgNP-loading in TOC and TOCNF, confirming that the interaction and fixing of nanoparticles on the cellulosic structure highly involve the alcoholic groups of the glucopyranose units, as also reported for other nanocellulose-based composites. 48 …”

Section: Resultsmentioning

confidence: 99%

“…Cellulose- and NC-AgNP nanocomposites have already been described and applied in several sectors. − In 2018, Ali et al first reported a cellulose–AgNP composite as an effective sorbent for the removal of metals from aqueous solutions . More recently, Tavker and co-workers demonstrated how the combination of AgNPs with CNF can provide high adsorption of Cd 2+ and Cr 3+ ions .…”

Section: Introductionmentioning

confidence: 99%

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Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption

Riva,

Dotti,

Iucci

et al. 2024

ACS Appl. Nano Mater.

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Nanocellulose constitutes a sustainable and biobased solution both as an efficient sorbent material for water treatment and as support for other inorganic nanomaterials with sorbent properties. Herein, we report the synthesis of a nanocomposite by deposition of in situ-generated silver nanoparticles (AgNPs) onto TEMPO-oxidized cellulose nanofibers (TOCNFs). Following an in-depth analytical investigation, we unveil for the first time the key role of AgNPs in enhancing the adsorption efficiency of TOCNF toward Cd 2+ ions, chosen as model heavy metal contaminants. The obtained nanocomposite shows a value of Cd 2+ sorption capacity at equilibrium from 150 mg L −1 ion aqueous solutions of ∼116 mg g −1 against the value of 78 mg g −1 measured for TOCNF alone. A combination of field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS) analyses suggests that Cd 2+ ions are mainly adsorbed in the neighborhood of AgNPs. However, XPS characterization allows us to conclude that the role of AgNPs relies on increasing the exposure of carboxylic groups with respect to the original TOCNF, suggesting that these groups are still responsible for absorption. In fact, X-ray absorption spectroscopy (XAS) analysis of the Cd−K edge excludes a direct interaction between Ag 0 and Cd 2+ , supporting the XPS results and confirming the coordination of the latter with carboxyl groups.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption

Riva,

Dotti,

Iucci

et al. 2024

ACS Appl. Nano Mater.

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“…Because of their unique advantages, PVA hydrogels are an excellent choice for biomaterials, but maintaining stable mechanical properties for achieving long-lasting stability is difficult. Flexible wood-based hydrogels are complementary in the field of biomaterials due to their multiple hydroxyl groups . Herein, a flexible wood-based substrate is loaded with a PVA hydrogel containing a large amount of BP, which exhibits excellent photothermal conversion and photodynamic effects and can rapidly inhibit infected wounds, and then supplemented with clarithromycin for long-lasting sustained release to prevent wound re-infection and bFGF to accelerate wound healing.…”

Section: Discussionmentioning

confidence: 99%

Efficient Photothermal, Flexible Wood-Based Hydrogel for Infected Wound Recovery

Liu

Song

et al. 2023

ACS Sustainable Chem. Eng.

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Photothermal therapy, because of its inherent high specificity and low invasiveness, can easily and quickly inhibit infected wounds and promote repair. Herein, flexible wood (LM) was synthesized and combined with clarithromycin-carrying black phosphorus in a polyvinyl alcohol matrix to create a highly effective photothermal and flexible wood-based hydrogel (LM@PBKb), which exhibited photothermal and photodynamic bactericidal effects as well as long-lasting wound sterility for the treatment of infected skin wounds. The LM@PBKb hydrogel exhibited a photothermal conversion efficiency of 28.8%. When 808 nm laser irradiation and the long-lasting sustained release of the LM@PBKb hydrogel were combined, Escherichia coli was almost completely inhibited. After 808 nm laser irradiation in the near-infrared region, LM@PBKb used in mice with infected wounds rapidly inhibited infection, maintained a sterile environment for a long time, and accelerated wound healing. Scanning electron microscopy images show that the wounds treated with LM@PBKb were relatively flat and resembled uninfected wounds. This highly efficient photothermal flexible wood-based hydrogel is a high-potential environmentally friendly biomaterial.

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“…Besides, the band at 1158 cm −1 is referent to C-O-C cellulose and hemicellulose groups and C-O from the cellulose group (1023 cm −1 ) 46 . Other bands between 900 to 600 cm −1 were detected and can be attributed to glycosidic and C-OH groups 47,48 .…”

Section: Chemical Characterizationmentioning

confidence: 99%

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

Rabelo Aparício,

Machado dos Santos,

Siqueira Magalhães Rebelo

et al. 2024

Sci Rep

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The use of castor oil in producing polyurethane resins has been identified as one of the most promising options for the industry. The piassava fibers waste generated by the industry on a large scale presents excellent properties as a reinforcing agent due to its high lignin content characterized by chemical tests and FTIR. Composite boards consisting of a higher content of mercerized piassava fibers (10 mm, 85 wt.%) reinforced polyurethane castor oil-based resin (prepolymer (PP) and polyol (OM)) exhibited excellent performance. Composites with these properties have strong potential for medium-density applications ranging from biomedical prosthetics to civil partition walls and insulation linings. Alkali treatment removed the superficial impurities of piassava fibers, activating polar groups, and physical characterization reported excellent performance for all composites. Among the composites, the CP3 sample (composite reinforced with piassava fibers (85 wt.% fibers; 1.2:1—PP:OM)) stood out with higher density and lower swelling and water absorption percentage than other composites. FTIR results indicated NCO traces after the resin cured in the PU3 (1.2:1—PP:OM), possibly contributing to the interaction with the fibers. DMA results reported relevant information about more flexibility to CP1 (composite reinforced with piassava fibers (85 wt.% fibers; 0.8:1—PP:OM)) and CP3 than CP2 (composite reinforced with piassava fibers (85 wt.% fibers; 1:1—PP:OM)). The results suggest that the proper combination with natural products must lead to composites with potential applications as engineering materials.

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Preparation of a Conductive Cellulose Nanofiber-reinforced PVA Composite Film with Silver Nanowires Loading

Cited by 11 publications

References 63 publications

Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption

Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption

Efficient Photothermal, Flexible Wood-Based Hydrogel for Infected Wound Recovery

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

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Preparation of a Conductive Cellulose Nanofiber-reinforced PVA Composite Film with Silver Nanowires Loading

Cited by 11 publications

References 63 publications

Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd2+ Cation Adsorption

Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd2+ Cation Adsorption

Efficient Photothermal, Flexible Wood-Based Hydrogel for Infected Wound Recovery

Performance of castor oil polyurethane resin in composite with the piassava fibers residue from the Amazon

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Product

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Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption

Silver Nanoparticles Supported onto TEMPO-Oxidized Cellulose Nanofibers for Promoting Cd²⁺ Cation Adsorption