Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites

Xie, Fengwei; Martino, Verónica P.; Sangwan, Parveen; Way, Cameron; Cash, Gregory; Pollet, Éric; Dean, Katherine; Halley, P. J.; Avérous, Luc

doi:10.1016/j.polymer.2013.05.017

Cited by 48 publications

(35 citation statements)

References 41 publications

(44 reference statements)

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“…The addition of MMT in MS/20G films deteriorated the tensile strength and stiffness but the elongation at break was maintained/enhanced. This result is in agreement with previous studies where it was suggested that MMT layers are drifted with G molecules during the elongation process. This phenomenon was also observed in the case of MS/G/PVOH/MMT samples.…”

Section: Resultssupporting

confidence: 94%

“…The increase in d‐spacing of MS/20G/MMT in comparison to MS3MMT confirms that glycerol favors the opening of MMT interlayer space and supports the incorporation of MS chains into the MMT's platelets . In our case, sharp and intense 001 reflection in XRD patterns of MS/G/MMT films corresponds to well organized silicate layers, in other words to intercalated nanocomposite structure.…”

Section: Resultssupporting

confidence: 76%

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Preparation, Characterization, and Biodegradability Assessment of Maize Starch‐(PVOH)/Clay Nanocomposite Films

et al. 2018

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This study is focused on the preparation, characterization, and biodegradability assessment of clay nanocomposite films based on plasticized maize starch, prepared via solution casting method. Intercalated nano‐structure is achieved in all obtained films. Mechanical properties of the films prove to be dependent on the content of plasticizer (Glycerol) and poly‐vinyl‐alcohol (PVOH). Nanocomposite film with 10 wt% Glycerol and 20 wt% PVOH content possesses high stiffness and strength, but it is very brittle while nanocomposite film with 20 wt% Glycerol and 10 wt% PVOH content possesses reduced stiffness and strength but enhanced elongation at break, and film forming capability. Thermal stability of plasticized maize starch increases by 50 °C after addition of both PVOH and montmorillonite while water vapor transmission rate (WVTR) is reduced by 74% in comparison to the plasticized maize starch film. The biodegradation process increases in films with high starch content, while it is slow down when PVOH is added.

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Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 76%

Preparation, Characterization, and Biodegradability Assessment of Maize Starch‐(PVOH)/Clay Nanocomposite Films

et al. 2018

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“…Supporting these findings, it has been previously reported that using glycerol as a plasticizer makes films more hydrophilic and increase the biodegradation rate of films by microbial activity [21,22]. Xie et al [14] have reported that plasticized chitosan-based nanobiocomposites degraded more easily than unplasticized chitosan due to the presence of glycerol.…”

Section: Thermal Analysissupporting

confidence: 53%

“…Dean et al [13] have reported that addition of nanoclay to chitosan films 81 had no significant effect on degradation both in soil and composting conditions, which was prepared using melt processing method with or without glycerol as a plasticizer. Another study by Xie et al [14] which has reported that the addition of glycerol and unmodified nanoclay caused to increase of biodegradation degree, mainly related to the addition of unmodified nanoclay. As a consequence, the chitosan biodegradation mechanism in a composting environment is not well defined yet.…”

Section: Introductionmentioning

confidence: 96%

Biodegradation behavior of two different chitosan films under controlled composting environment

Ersan

Altun

Çelik

2019

Environmental Research and Technology

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ABS T RACTChitosan has applications in different industries, due to the superior properties, causing an increase in the production of chitosan containing waste. Although composting is the most suitable method for biodegradable wastes like chitosan, less is known about the degradation of chitosan within the composting environment. In this study, biodegradation behavior of bare chitosan films and neutralized chitosan films were investigated under controlled composting environment according to international standards. CO2 emission data showed higher degradation rate of bare chitosan films compared with neutralized chitosan films, which was also supported by SEM images and digital photographs in addition to the TGA and FTIR results. It can be concluded that the biodegradation rate of chitosan films under the composting environment is highly related to the amount of glycerol present in the films and the extraction rate of glycerol from film structure.

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“…Although this method is appropriate for preliminary study, it is not feasible on an industrial scale as large amounts of energy are required to evaporate the solvent, and the processes involved in power handling large volumes of film-forming solutions are complex (Guti errez & Alvarez, 2017). Polymer and food manufacturers thus prefer to produce thermoplastic starch (TPS) materials using techniques such as extrusion (Xie et al, 2013), which does not require the use of a solvent as starch gelatinization is achieved by the mechanical (shear force) and thermal energy produced during processing (Alam, Pathania, & Sharma, 2016;Zhang, Wang, Zhao, & Wang, 2013). In addition, extrusion is a continuous system that can be managed by only a few operators, thus optimizing the manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Bionanocomposite films developed from corn starch and natural and modified nano-clays with or without added blueberry extract

2018

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Edible and bionanocomposite films were developed by extrusion followed by thermo molding. Corn starch (Zea mays), glycerol, and several nano-clays were used as the carbohydrate polymer, plasticizer and nano-fillers, respectively. Pure blueberry (Vaccinium corymbosum) extract (BE, 100% anthocyanin), as well as natural and modified montmorillonites (Mnt) with or without BE nano-packaged within their layers were incorporated into the thermoplastic starch (TPS) matrix. Previous studies by our research group have shown that BE, and BE nano-packaged within natural and modified Mnt, are pH-sensitive. With this in mind, we set out to develop edible and intelligent (pH-sensitive) bionanocomposite films with improved properties. Unfortunately however, none of the films formulated were pH-sensitive. All the films showed X-ray diffractograms typical of semicrystalline, albeit largely amorphous, materials coinciding with the morphological observations made under scanning electron microscopy. The results confirmed that total starch gelatinization occurred under the selected extrusion conditions. Films prepared from corn starch containing BE showed a plasticizing effect, giving materials with lower thermal resistance and surface moisture values, which were also more opaque, denser, and rougher. All the nanofillers tested were completely exfoliated within the TPS matrix, except for the natural Mnt that was partly exfoliated and partly intercalated in the matrix. In general, materials containing nano-fillers with a greater degree of interlayer spacing (more exfoliated) showed higher thermal resistance and Young's modulus, but lower strain at break values.

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Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 48 publications

References 41 publications

Preparation, Characterization, and Biodegradability Assessment of Maize Starch‐(PVOH)/Clay Nanocomposite Films

Preparation, Characterization, and Biodegradability Assessment of Maize Starch‐(PVOH)/Clay Nanocomposite Films

Biodegradation behavior of two different chitosan films under controlled composting environment

Bionanocomposite films developed from corn starch and natural and modified nano-clays with or without added blueberry extract

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