A comparative study on cellulose nanocrystals extracted from bleached cotton and flax and used for casting films with glycerol and sorbitol plasticisers

Csiszár, Emı́lia; Nagy, Sebestyén

doi:10.1016/j.carbpol.2017.06.103

Cited by 67 publications

(67 citation statements)

References 38 publications

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“…The effects of cellulose source (cotton, flax), type of plasticizer (sorbitol, glycerol) and the amount of amino-aldehyde cross-linking agent were examined. The scanning electron micrographs of plasticized films from different sources confirmed our earlier observations that neither the source of cellulose nor the type of plasticizer affect significantly the inner morphology and structure of CNC films (Csiszár & Nagy, 2017). Adding 30 % cross-linking agent to the CNC suspension before film casting, however, leads to a slightly rougher fractured surface, as it is demonstrated for flax-CNC films in Fig.…”

Section: Morphologysupporting

confidence: 87%

“…Rectangular films were cast from the aqueous suspension of CNCs on the surface of a polypropylene plastic sheet, and their water content was allowed to evaporate at room temperature for about 2 days. In order to overcome the brittle nature of the CNC films, two different plasticizers, namely sorbitol and glycerol were added in 20 % concentration (Csiszár & Nagy, 2017). These polyhydroxy compounds were already successfully applied as plasticizers for thermoplastic starch films (Mathew & Dufresne, 2002).…”

Section: Preparation Of Films From the Cnc Suspensionsmentioning

confidence: 99%

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Cellulose nanocrystal/amino-aldehyde biocomposite films

Nagy

Csiszár

Kun

et al. 2018

Carbohydrate Polymers

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From the suspensions of cellulose nanocrystals (CNCs) derived from cotton and flax by acidic hydrolysis, transparent and smooth films were produced with different plasticizers and an amino-aldehyde based cross-linking agent in a wide composition range by a simultaneous casting and wet cross-linking process. The effect of cross-linker concentration on the optical and tensile properties and on the morphology of CNC films was investigated by various measurements. The interaction of films with liquid water and water vapour was also characterized by water sorption and water contact angle as well as performing a sinking test. Cross-linking improved the transparency, reduced the porosity and surface free energy, and prevented the delamination of CNC films in water at a concentration of 10% or higher. The surface of CNC films is basic in character and has an electron donor property. The CNC/amino-aldehyde films had a high tensile strength (45 MPa) and modulus (11 GPa).

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Section: Morphologysupporting

confidence: 87%

Section: Preparation Of Films From the Cnc Suspensionsmentioning

confidence: 99%

Cellulose nanocrystal/amino-aldehyde biocomposite films

Nagy

Csiszár

Kun

et al. 2018

Carbohydrate Polymers

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“…Films with glycerol exhibited a Young's modulus (E) 28.16% lower and an elongation at break (e) 37.20% higher than the films using sorbitol as plasticizer (Table 2). This result may be related to the superior capacity of glycerol to act as a plasticizer, which is explained by its lower molecular weight and ability to improve water incorporation (Csiszár and Nagy 2017;Cerqueira et al 2012a). The E reduction and e increase observed for glycerol containing films when compared to sorbitol, were also observed by Thomazine et al (2006) for gelatin-based films.…”

Section: Effect Of Plasticizers On Properties Of Bcnf-based Filmsmentioning

confidence: 88%

Bacterial cellulose nanofiber-based films incorporating gelatin hydrolysate from tilapia skin: production, characterization and cytotoxicity assessment

et al. 2018

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In this work, films based on bacterial cellulose nanofibers (BCNFs) incorporating gelatin hydrolysate (GH) from tilapia skin were produced. The effect of plasticizer (sorbitol or glycerol) and GH incorporation was evaluated on the physical-chemical and optical properties of films. BCNFs were produced using bacterial cellulose obtained from Hestrin and Schramm (HS) medium (BCNF-HS) or cashew apple juice (BCNF-CM), which was studied as an alternative to HS. Films with sorbitol showed the best properties and were selected for further characterization, using 40% (w/w) of BCNF-HS, 40% (w/w) of GH and 20% (w/w) of sorbitol (BCNF-HS-S-GH films). These films exhibited an antioxidant activity of 7.8 lmols Trolox Eq/g film, a water vapor permeability (WVP) of 1.6 g.mm/kPa.h.m 2 and an Young's modulus of 0.57 GPa. Films produced with BCNFs obtained from cashew apple juice revealed enhanced tensile strength, elongation at break, and thermal stability. Caco-2 cells' viability after incubation with BCNF-based films incorporating GH was evaluated and showed non-cytotoxicity, reinforcing the safety of the developed materials and their potential use in food applications.

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“…They are widely used in the packaging, agricultural, healthcare and medical areas [1][2][3][4][5][6][7][8][9][10][11][12][13]. In the field of packaging, the most commonly used biopolymer is starch.…”

Section: Introductionmentioning

confidence: 99%

Improving physical properties and retrogradation of thermoplastic starch by incorporating agar

Fekete

Bella

Csiszár

et al. 2019

International Journal of Biological Macromolecules

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To develop functional and sustainable packaging materials from starch and to enhance their properties, agar was added to thermoplastic corn starch (TPS) in a wide concentration range and the products were prepared either by casting or melt blending with a high glycerol content. The role of agar in the mechanical and barrier performance of films, as well as the compatibility of TPS and agar was systematically evaluated. In addition, the retrogradiation of starch in various blends after long storage periods was widely characterized. Results proved that the addition of agar to TPS resulted in films with promising barrier and tensile properties. Stiffness and strength increased considerably by increasing agar content, while deformability of blends was better than those of pure TPS. Agar incorporation decreased water permeability and solubility and improved light transmittance. Retrogradation of the dry blends was significantly smaller than that of pure TPS owing to the strong starch/agar interaction.

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A comparative study on cellulose nanocrystals extracted from bleached cotton and flax and used for casting films with glycerol and sorbitol plasticisers

Cited by 67 publications

References 38 publications

Cellulose nanocrystal/amino-aldehyde biocomposite films

Cellulose nanocrystal/amino-aldehyde biocomposite films

Bacterial cellulose nanofiber-based films incorporating gelatin hydrolysate from tilapia skin: production, characterization and cytotoxicity assessment

Improving physical properties and retrogradation of thermoplastic starch by incorporating agar

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