Influence of storage conditions on starch/PVA films containing cellulose nanofibers

Panaitescu, Denis Mihaela; Frone, Adriana Nicoleta; Ghiurea, Marius; Chiulan, Ioana

doi:10.1016/j.indcrop.2015.03.028

Cited by 85 publications

(44 citation statements)

References 43 publications

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“…In this group of techniques the cantilever oscillates as in the intermittent contact regime, with the frequency in range from few kHz (Peak Force QNM mode from Bruker [69], QI from JPK [70] to tens of kHz (Harmonix [71,72], NanoSwing [73,74]). The force curves acquired with the speed of few thousands per second must be filtered, fitted, quantified and recorded by the data processing unit.…”

Section: Time-resolved Tapping Mode Basing Techniquesmentioning

confidence: 99%

Quantitative Normal Force Measurements by Means of Atomic Force Microscopy Towards the Accurate and Easy Spring Constant Determination

Sikora¹

2016

NSNM

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Due to its rapid popularity increase within last three decades, with particular focus on submicrometer quantitative surface's properties imaging, atomic force microscopy (AFM) is still a subject of development and research in terms of both better understanding and efficient utilization of various measurement techniques. Quantitative and comparable measurements at nanoscale are a significant issue, as both: science and industry desire reliable results, allowing to perform repetitive experiments at any time and location. Therefore a numerous analysis and research projects were carried out to provide metrological approach for those techniques in terms of providing the traceability and the uncertainty estimation. In this paper an overview of various methods and approaches towards quantitative determination of the normal spring constant of the AFM probes is presented.

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Section: Time-resolved Tapping Mode Basing Techniquesmentioning

confidence: 99%

Quantitative Normal Force Measurements by Means of Atomic Force Microscopy Towards the Accurate and Easy Spring Constant Determination

Sikora¹

2016

NSNM

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“…As expected, the elastic behavior of polymer nanocomposites can be totally different at a nanoscaled level. Even with respect to neat polymers alone, the elastic modulus of crystalline phases for semicrystalline polymers has been found to be much higher than that of amorphous phases (Panaitescu et al, 2015). It was suggested that in a peakforce quantitative tapping mode (PFQNM), the elastic modulus of polypropylene crystalline phase was increased by 69.23% as opposed to that of amorphous phase (Voss et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Elastic Behavior of Nanophases in Polyvinyl Alcohol (PVA)/Bamboo Charcoal (BC) Nanocomposite Films

Mousa

Dong

2018

Front. Mater.

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Polyvinyl alcohol (PVA) nanocomposite films reinforced with bamboo charcoal (BC) nanoparticles were successfully fabricated via solution casting and their nanomechanical properties in terms of material phases were determined by a peak force quantitative nanomechanical tapping mode (PFQNM). Our experimental results revealed that the elastic modulus of PVA semicrystalline phase in stack-bundle form was 24 ± 4.2 GPa with the semicrystalline phase width being 20-76 nm, as opposed to 11.4 ± 3.1 GPa and 18-65 nm for corresponding PVA amorphous phase accordingly. The incorporation of BC nanoparticles enhanced the elastic moduli of both crystalline and amorphous phases of PVA by ∼51% and ∼100%, respectively. Moreover, the phase width was decreased to be in range of 5-53 nm for crystalline phase and 4-35 nm for amorphous phase.

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“…Nanocellulose crystals have numerous advantages compared with other nano-structured materials, such as ease of formation, low cost of raw materials, diverse characteristics, which are dependent on the source of the natural substrate, and more beneficial mechanical properties compared with carbon nano-tubes and inorganic nano-fibers (Strurcova et al, 2006;Panaitescu et al, 2015;Qin et al, 2016;Li et al, 2016;Liu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Characterization of cassava starch films plasticized with glycerol and strengthened with nanocellulose from green coconut fibers

Machado¹,

Reis²,

Cruz³

et al. 2017

Afr. J. Biotechnol.

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The aim of this study was to obtain and characterize biodegradable films of cassava starch plasticized with glycerol and reinforced with nanocellulose from coconut fibers. The mechanical and physicalchemical properties of the nano-biocomposites films obtained were evaluated. The method used to investigate the viability of incorporating coconut nanocellulose in films was applied through a statistical design of the response surface of 17 formulations containing three independent variables (starch, glycerol and nanocellulose). The films were prepared through casting technique, and the effect of different concentrations of the ingredients in each formulation was investigated by monitoring the dependent variables. The green coconut fiber was composed of 32% cellulose, 38% lignin and 0.25% hemicellulose resulted in nanocellulose with a length (L)/diameter(D) value of 38.9±4.7 after the acid hydrolysis process (64% H 2 SO 4 ; 50°C; 10-15 min). The incorporation of nanocellulose resulted in significant changes (p<0.05) in the barrier and mechanical properties. Additionally, there was a significant increase in the Young's modulus and in the tensile of the nano-biocomposites. Consequently, there was a decrease in the percentage of elongation. Thus, films formulated from cassava starch plasticized with glycerol could have significantly altered mechanical, technical and barrier properties due to the incorporation of coconut nanocellulose.

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Influence of storage conditions on starch/PVA films containing cellulose nanofibers

Cited by 85 publications

References 43 publications

Quantitative Normal Force Measurements by Means of Atomic Force Microscopy Towards the Accurate and Easy Spring Constant Determination

Quantitative Normal Force Measurements by Means of Atomic Force Microscopy Towards the Accurate and Easy Spring Constant Determination

Elastic Behavior of Nanophases in Polyvinyl Alcohol (PVA)/Bamboo Charcoal (BC) Nanocomposite Films

Characterization of cassava starch films plasticized with glycerol and strengthened with nanocellulose from green coconut fibers

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