Ag-functionalized nanocrystalline cellulose for paper preservation and strengthening

Bergamonti, Laura; Potenza, Marianna; Poshtiri, Azar Haghighi; Lorenzi, Andrea; Sanangelantoni, Anna Maria; Lazzarini, L.; Lottici, Pier Paolo; Graiff, Claudia

doi:10.1016/j.carbpol.2019.115773

Cited by 32 publications

(35 citation statements)

References 65 publications

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“…AgNP suspension (nominal concentration: 1000 ppm) was prepared by AgNO 3 reduction in water with NH 4 , stabilized with poly-vinyl-alcohol (PVA), [28]. Dynamic Light Scattering particle size characterization of the AgNP suspension (1000 ppm) indicated an average hydrodynamic radius of about 60-80 nm.…”

Section: Methodsmentioning

confidence: 99%

Three-Dimensional (3D) Printed Silver Nanoparticles/Alginate/Nanocrystalline Cellulose Hydrogels: Study of the Antimicrobial and Cytotoxicity Efficacy

et al. 2020

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Here, a formulation of silver nanoparticles (AgNPs) and two natural polymers such as alginate (ALG) and nanocrystalline cellulose (CNC) was developed for the 3D printing of scaffolds with large surface area, improved mechanical resistance and sustained capabilities to promote antimicrobial and cytotoxic effects. Mechanical resistance, water content, morphological characterization and silver distribution of the scaffolds were provided. As for applications, a comparable antimicrobial potency against S. aureus and P. aeruginosa was demonstrated by in vitro tests as function of the AgNP concentration in the scaffold (Minimal Inhibitory Concentration value: 10 mg/mL). By reusing the 3D system the antimicrobial efficacy was demonstrated over at least three applications. The cytotoxicity effects caused by administration of AgNPs to hepatocellular carcinoma (HepG2) cell culture through ALG and ALG/CNC scaffold were discussed as a function of time and dose. Finally, the liquid chromatography-mass spectrometry (LC-MS) technique was used for targeted analysis of pro-apoptotic initiation and executioner caspases, anti-apoptotic and proliferative proteins and the hepatocyte growth factor, and provided insights about molecular mechanisms involved in cell death induction.

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Section: Methodsmentioning

confidence: 99%

Three-Dimensional (3D) Printed Silver Nanoparticles/Alginate/Nanocrystalline Cellulose Hydrogels: Study of the Antimicrobial and Cytotoxicity Efficacy

et al. 2020

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“…newly exposed cellulose hydroxyl groups. 31,32 The band at around 2900 cm -1 for all samples is attributed to the aliphatic C-H stretching vibration in methyl (CH 3 ) and methylene (CH 2 ) functional groups. The band at 1460 cm -1 represents the aromatic ring C=C of the phenyl propane group of the lignin.…”

Section: Atr-ftir Spectroscopic Characterizationmentioning

confidence: 99%

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

2021

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In this study, microcrystalline cellulose (MCC) was isolated from walnut and apricot shells (WS and AS) as agricultural wastes in order to use it as reinforcement in polymer composites. The microcrystalline cellulose was extracted by alkaline treatment and bleached by peroxide as an environmentally friendly treatment, called walnut cellulose (WC) and apricot cellulose (AC). The chemical composition of the samples was set according to the Technical Association of Pulp and Paper Industry (TAPP). After treatments, the alpha-cellulose content increased by about 23 % for the two used cellulose sources. The structural and morphological properties of the samples were investigated by Fourier transform infrared spectroscopy in the attenuated total reflectance mode (ATR-FTIR), optical microscopy (OM), X-ray diffraction and scanning electron microscopy (SEM). The crystallinity index values evaluated for WC and AC via X-ray diffraction were respectively 86.4 and 80.3 %. The alkaline soluble fractions of walnut (ASW) and apricot (ASA) shells were recovered and characterized by OM and ATR-FTIR spectroscopy. Furthermore, their chemical composition was analyzed. The characterization and the properties of the WC and AC were similar to those of commercial MCC and MCC prepared in literature from wood and some agricultural wastes.

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“…It has been widely explored in numerous areas in food packaging ( Figure 1 ) [ 39 , 40 , 41 ]. CNC has high elastic modulus, optical transparency, low thermal expansion coefficient, good gas barrier properties, and low toxicity, thus being biocompatible and biodegradable [ 42 ]. In packaging, CNC has been used as a gas barrier and filler of nanocomposites [ 39 , 40 , 43 ].…”

Section: Biopolymers As Food Packaging Raw Materialsmentioning

confidence: 99%

Graphene Derivatives in Biopolymer-Based Composites for Food Packaging Applications

et al. 2020

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This review aims to showcase the current use of graphene derivatives, graphene-based nanomaterials in particular, in biopolymer-based composites for food packaging applications. A brief introduction regarding the valuable attributes of available and emergent bioplastic materials is made so that their contributions to the packaging field can be understood. Furthermore, their drawbacks are also disclosed to highlight the benefits that graphene derivatives can bring to bio-based formulations, from physicochemical to mechanical, barrier, and functional properties as antioxidant activity or electrical conductivity. The reported improvements in biopolymer-based composites carried out by graphene derivatives in the last three years are discussed, pointing to their potential for innovative food packaging applications such as electrically conductive food packaging.

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Ag-functionalized nanocrystalline cellulose for paper preservation and strengthening

Cited by 32 publications

References 65 publications

Three-Dimensional (3D) Printed Silver Nanoparticles/Alginate/Nanocrystalline Cellulose Hydrogels: Study of the Antimicrobial and Cytotoxicity Efficacy

Three-Dimensional (3D) Printed Silver Nanoparticles/Alginate/Nanocrystalline Cellulose Hydrogels: Study of the Antimicrobial and Cytotoxicity Efficacy

Characterization of microcrystalline cellulose extracted from walnut and apricots shells by alkaline treatment

Graphene Derivatives in Biopolymer-Based Composites for Food Packaging Applications

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