Biocomposites with increased dielectric constant based on chitosan and nitrile-modified cellulose nanocrystals

Bonardd, Sebastián; Robles, Eduardo; Barandiaran, Irati; Saldías, César; Leiva, Ángel; Kortaberría, Galder

doi:10.1016/j.carbpol.2018.06.088

Cited by 74 publications

(60 citation statements)

References 66 publications

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“…As presented in Table S2, the mechanical behavior of CNC4 was higher than that previously reported [5,30,31,[33][34][35]51,55,60,83] suggesting that CNC/CS films can be used in the food packaging industry.…”

Section: Comparison Of Obtained Mechanical Performance Between the Prmentioning

confidence: 65%

“…MPa [33]. The TS values of films were comparable to those of plastic-based films, such as films based on LDPE (8-10 MPa), HDPE (19-31 MPa), EVOH (6-19 MPa), PCL (4 MPa), PS (31-49 MPa), PLA (45 MPa), PVC (42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55), and PP (27-98 MPa) [50]. Li et al [69] found that the TS of the composite films increased from 85 to 120 MPa, with an increase of CNC content from 0 to 15 wt.%.…”

Section: Mechanical Propertiesmentioning

confidence: 67%

“…The composites showed slightly higher degradation curves than the neat CS. After CNC inclusion, the thermal stability of CNC-reinforced CS composite films showed marginal improvement due to interactions between CNC and CS matrix [51]. Figure 6b depicts the derivative TGA (DTG) curves of the samples.…”

Section: Equilibrium Moisture Content (Emc)mentioning

confidence: 99%

“…The TS of the CS control film (75.2 ± 1.6 MPa) obtained in this study was similar to that of films in previous reports, such as ca. 72.0 [51], 79 [76], 21.07 [5], 46.50 [34], 85.0 [55], 32.9 [64], and 47.68. MPa [33].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Cellulose Nanocrystal Reinforced Chitosan Based UV Barrier Composite Films for Sustainable Packaging

et al. 2020

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In this study, green composite films based on cellulose nanocrystal/chitosan (CNC/CS) were fabricated by solution casting. FTIR, XRD, SEM, and TEM characterizations were conducted to determine the structure and morphology of the prepared films. The addition of only 4 wt.% CNC in the CS film improved the tensile strength and Young’s modulus by up to 39% and 78%, respectively. Depending on CNC content, the moisture absorption decreased by 34.1–24.2% and the water solubility decreased by 35.7–26.5% for the composite films compared with neat CS film. The water vapor permeation decreased from 3.83 × 10−11 to 2.41 × 10−11 gm−1 s−1Pa−1 in the CS-based films loaded with (0–8 wt.%) CNC. The water and UV barrier properties of the composite films showed better performance than those of neat CS film. Results suggested that CNC/CS nanocomposite films can be used as a sustainable packaging material in the food industry.

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Section: Comparison Of Obtained Mechanical Performance Between the Prmentioning

confidence: 65%

Section: Mechanical Propertiesmentioning

confidence: 67%

Section: Equilibrium Moisture Content (Emc)mentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

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Cellulose Nanocrystal Reinforced Chitosan Based UV Barrier Composite Films for Sustainable Packaging

et al. 2020

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“…Motivated by the outstanding works of Zhu et al in the dipolar glass polymers research field, our group has recently reported the preparation of biobased thin film nanocomposites with improved dielectric properties using-modified nanocellulose and chitosan (Figure 6), both materials are known to derive from industrial waste. The cyanoethylation of cellulose nanocrystals (CN-CNC) was achieved through a “green” method for the first time [14]. Then, the modified CNC were incorporated into a chitosan (Chi) matrix, resulting in a homogeneous and flexible material with a high dielectric constant due to the high dipole moment of the nitrile functional group.…”

Section: Small Groups With High Dipole Momentsmentioning

confidence: 99%

Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview

et al. 2019

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Materials that have high dielectric constants, high energy densities and minimum dielectric losses are highly desirable for use in capacitor devices. In this sense, polymers and polymer blends have several advantages over inorganic and composite materials, such as their flexibilities, high breakdown strengths, and low dielectric losses. Moreover, the dielectric performance of a polymer depends strongly on its electronic, atomic, dipolar, ionic, and interfacial polarizations. For these reasons, chemical modification and the introduction of specific functional groups (e.g., F, CN and R−S(=O)2−R´) would improve the dielectric properties, e.g., by varying the dipolar polarization. These functional groups have been demonstrated to have large dipole moments. In this way, a high orientational polarization in the polymer can be achieved. However, the decrease in the polarization due to dielectric dissipation and the frequency dependency of the polarization are challenging tasks to date. Polymers with high glass transition temperatures (Tg) that contain permanent dipoles can help to reduce dielectric losses due to conduction phenomena related to ionic mechanisms. Additionally, sub-Tg transitions (e.g., γ and β relaxations) attributed to the free rotational motions of the dipolar entities would increase the polarization of the material, resulting in polymers with high dielectric constants and, hopefully, dielectric losses that are as low as possible. Thus, polymer materials with high glass transition temperatures and considerable contributions from the dipolar polarization mechanisms of sub-Tg transitions are known as “dipolar glass polymers”. Considering this, the main aspects of this combined strategy and the future prospects of these types of material were discussed.

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Husk and Straw of Cereals Grains for Sustainable Food Packaging

Baiju,

Mukkadan,

Radhakrishnan

2024

Agro‐Waste Derived Biopolymers and Biocomposites

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Biocomposites with increased dielectric constant based on chitosan and nitrile-modified cellulose nanocrystals

Cited by 74 publications

References 66 publications

Cellulose Nanocrystal Reinforced Chitosan Based UV Barrier Composite Films for Sustainable Packaging

Cellulose Nanocrystal Reinforced Chitosan Based UV Barrier Composite Films for Sustainable Packaging

Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview

Husk and Straw of Cereals Grains for Sustainable Food Packaging

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