Preparation and characterization of nanofibrillated Cellulose/Poly (Vinyl Alcohol) composite films

Kord, Behzad; Malekian, Behrouz; Yousefi, Hossein; Najafi, Abdollah

doi:10.4067/s0718-221x2016005000065

Cited by 18 publications

(19 citation statements)

References 25 publications

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“…Since the proposed bioink formulation is composed from polysaccharides (e.g., ALG, CMC, and NFC, although there is some controversy in this regard as shown in [48], where NFC seemed to increase the contact angles of the base film composite samples), known for their hydrophilic nature, we expected that a bioink possesses high surface wettability. It is known that wettability, along with surface topography, determines cell/material interactions, whereas wettability itself is affected by material chemistry and topography.…”

Section: Wettability (Hydrophilicity/hydrophobicity) Of the Bioink Fomentioning

confidence: 99%

Polysaccharide-Based Bioink Formulation for 3D Bioprinting of an In Vitro Model of the Human Dermis

et al. 2020

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Limitations in wound management have prompted scientists to introduce bioprinting techniques for creating constructs that can address clinical problems. The bioprinting approach is renowned for its ability to spatially control the three-dimensional (3D) placement of cells, molecules, and biomaterials. These features provide new possibilities to enhance homology to native skin and improve functional outcomes. However, for the clinical value, the development of hydrogel bioink with refined printability and bioactive properties is needed. In this study, we combined the outstanding viscoelastic behavior of nanofibrillated cellulose (NFC) with the fast cross-linking ability of alginate (ALG), carboxymethyl cellulose (CMC), and encapsulated human-derived skin fibroblasts (hSF) to create a bioink for the 3D bioprinting of a dermis layer. The shear thinning behavior of hSF-laden bioink enables construction of 3D scaffolds with high cell density and homogeneous cell distribution. The obtained results demonstrated that hSF-laden bioink supports cellular activity of hSF (up to 29 days) while offering proper printability in a biologically relevant 3D environment, making it a promising tool for skin tissue engineering and drug testing applications.

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Section: Wettability (Hydrophilicity/hydrophobicity) Of the Bioink Fomentioning

confidence: 99%

Polysaccharide-Based Bioink Formulation for 3D Bioprinting of an In Vitro Model of the Human Dermis

et al. 2020

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“…During the last decades, both ecological and economic interests have resulted in a more intensive utilization of natural and recycled materials for development composites (Kim et al 2007, Najafi 2013, Ou et al 2014, Nafchi et al 2015, Kord et al 2016. Issues such as recyclability and environmental safety have become important for introduce composites materials in several markets (AlMaadeed et al 2014a, Kord et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Issues such as recyclability and environmental safety have become important for introduce composites materials in several markets (AlMaadeed et al 2014a, Kord et al 2016). An important group of these materials is represented by lignocellulosic fibers reinforced thermoplastic polymers.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, dynamic mechanical and morphological properties of composites based on recycled polystyrene filled with wood flour wastes

Poletto

2017

Maderas, Cienc. tecnol.

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In this work, the potential for usage recycled polystyrene and wood flour wastes as materials for development wood plastic composites was evaluated. The effects of wood flour loading and coupling agent addition on the mechanical, dynamic mechanical and morphological properties of polystyrene wood flour composites were examined. The results showed that the mechanical properties decreased with the wood flour loading. However, an improvement in composite compatibility was observed when the coupling agent was used resulting in the increase of mechanical and dynamic mechanical properties. A morphological study demonstrates the positive effect in the interfacial adhesion between filler and matrix caused by the coupling agent addition. Based on the findings of this work, both waste materials can be used for development composites with higher performance.

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“…In addition, there are number of studies revealing properties of MFC/NFC suspensions and their films (Saito et al 2007, Bismarck et al 2005, Dri et al 2013, Viana et al 2016. Besides, new trend related to MFC/NFC is of their composites with inorganic/organic polymers (Kord et al 2016, Poyraz et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production

Tozluoğlu

Poyraz

Candan

2018

Maderas, Cienc. tecnol.

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There is still a need to improve the production sequences of micro fibrillated and nano fibrillated celluloses to obtain more economic and better quality products. The aim of this study was to improve the production efficiency and quality of micro fibrillated and nano fibrillated celluloses by examining the enzyme (xylanase endo-1,4-) employed in pretreatment sequences. Fairly homogeneous nano fibrillated cellulose with a width of 35 ± 12 nm was produced in this study. Sequences employed to produce micro fibrillated and nano fibrillated celluloses decreased the cellulose crystallinity of bleached kraft pulp and lower total crystalline index and lateral order index values were observed for micro fibrillated and nano fibrillated celluloses in FTIR examinations. Lower crystallinities were also defined by 13 C-NMR (46,2 ppm) which was substantiated with C6 peaks in the amorphous domain. Sequences to produce micro fibrillated and nano fibrillated celluloses resulted in shorter fiber dimensions with less ordered cellulose structure leading lower thermal degradation that reveal main polymer chain source from cellulose units. Dynamic mechanical thermal analysis results showed that the initial and maximum storage modulus of the nano fibrillated and micro fibrillated celluloses films were improved by 114% and 101%, respectively. The storage modulus of micro fibrillated and nano fibrillated celluloses films were 4,96 GPa and 2,66 GPa at temperature of 235°C, respectively.

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Preparation and characterization of nanofibrillated Cellulose/Poly (Vinyl Alcohol) composite films

Cited by 18 publications

References 25 publications

Polysaccharide-Based Bioink Formulation for 3D Bioprinting of an In Vitro Model of the Human Dermis

Polysaccharide-Based Bioink Formulation for 3D Bioprinting of an In Vitro Model of the Human Dermis

Mechanical, dynamic mechanical and morphological properties of composites based on recycled polystyrene filled with wood flour wastes

Examining the efficiency of mechanic/enzymatic pretreatments in micro/nanofibrillated cellulose production

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