Films from xylan/chitosan complexes: preparation and characterization

Schnell, Carla N.; Galván, María Verónica; Peresin, María Soledad; Inalbon, María Cristina; Vartiainen, Jari; Zanuttini, Miguel Angel Mario; Mocchiutti, Paulina

doi:10.1007/s10570-017-1411-x

Cited by 41 publications

(26 citation statements)

References 30 publications

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“…These materials have good surface adhesion and they have generally good gas barrier properties. [ 39 ] Particularly, the low oxygen permeability of xylan [ 40,41 ] and PEI [ 16,37 ] has been demonstrated. As a result, the useful life of the product can be improved without creating anaerobic conditions unlike lipid‐based films.…”

Section: Resultsmentioning

confidence: 99%

“…A clear difference between the storage modulus (E') of 50/50 and 85/15 films (with and without phase separation) can be noticed. While the former only reached values lower than 700 MPa, [40] 70/30 xylan/chitosan 5.9 ± 0.2 the 85/15 showed values of up to 5000 MPa. It is worth mentioning that this higher stiffness of the 85/15 films could be clearly perceived by touch.…”

Section: Figure 6amentioning

confidence: 87%

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Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Solier

Mocchiutti

Inalbon

et al. 2022

Macro Materials & Eng

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This work investigates film formation using polyelectrolyte complexes (PECs) of xylan and polyethylenimine (PEI). Different xylan/PEI mass ratios (from 50/50 to 90/10) and pH values (5.0 and 7.0) are analyzed and both parameters have an effect on complex size and film properties. Furthermore, the mass ratio corresponding to the neutralization charge depends on pH. When xylan/PEI mass ratios are near the neutralization charge ratio, a coacervation process is observed. In this case, separation between the coacervate and the supernatant dilute phase is possible. In the supernatant, both concentrations, xylan and PEI, depend on pH. The complex suspensions are used to obtain films by PECs casting/evaporation process. For films obtained from the whole suspension, by increasing the xylan content the stress at break is improved (up to 23 MPa for 85/15, at pH 7.0) and the strain at break is decreased (to 2.5%). When only coacervate is used to prepare films, the tensile strength is higher, reaching a value of 37 MPa for 85/15 mass ratio. Dynamic mechanical thermal analysis shows that the glass transition temperature (Tg) of the films is affected by composition. The thermoplastic behavior of a 50/50 xylan/PEI film is confirmed using a hot‐compression molding.

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Section: Resultsmentioning

confidence: 99%

Section: Figure 6amentioning

confidence: 87%

Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Solier

Mocchiutti

Inalbon

et al. 2022

Macro Materials & Eng

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“…The degree of deacetylation (78.1%) was previously determined . A solution in acetic acid (0.25%w/v) at a concentration of 2.5 g/L was prepared and the pH was adjusted to 5.0 …”

Section: Methodsmentioning

confidence: 99%

“…The crystalline structure of 100% M/NFC and 100% NFC films, as well as Xyl/Ch film containing different amounts of M/NFC or NFC, was analyzed by X-ray diffraction (XRD) using a Panalytical Empyrean instrument, operated at 40 kV and 45 mA, using Cu Kα radiation (λ = 0.154 nm). Diffractograms were recorded using a scanning speed of 1 °/min from 5 to 30° (2θ scale) . The XRD patterns obtained were normalized.…”

Section: Methodsmentioning

confidence: 99%

Use of Micro/Nano- and Nanofibrillated Cellulose To Improve the Mechanical Properties and Wet Performance of Xylan/Chitosan Films: A Comparison

Schnell,

Inalbon,

Minari

et al. 2023

ACS Appl. Polym. Mater.

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Growing health and environmental regulations are enforcing the preparation of sustainable and eco-friendly materials. In this context, this study investigates the effects of incorporating in a strategic manner micro/nanofibrillated cellulose (M/NFC) and only the nanofibrillated cellulose fraction (NFC) into xylan (Xyl)/ chitosan (Ch)-based materials. The objective is to establish the bases to formulate films with optimized mechanical and wet performance. The M/NFC was successfully obtained from commercial spruce dissolving pulp by oxalic acid pretreatment followed by mechanical processing. The M/NFC and the NFC fraction were deeply characterized by complementary techniques. It was found that the nanofibrillation yield was 60% and the content of the carboxylic acid groups increased with the treatments (up to 267 μeq/g). To obtain homogeneous films, fibrillated cellulose was dispersed in the cationic polyelectrolyte solution (Ch) prior to the anionic polyelectrolyte (Xyl) addition. The films prepared with the cellulosic material up to 5−7 wt % of M/NFC or NFC were shown to be nonporous, uniform, and highly transparent (particularly when NFC was used). Furthermore, the crystallinity, thermal stability, and mechanical properties of the films increased, mainly when 5 wt % M/NFC was used (stress at break 88.6 MPa, strain at break 5.6%). The cellulose-containing films were less water-sensitive, kept their integrity after immersion in water, and showed an enhanced hydrophobicity surface compared to the reference Xyl/Ch film. All these results suggest that the addition of micro-and nanofibrillated cellulose under proper conditions is an alternative to improve the properties of natural-based films, highlighting their potential application for food packaging.

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“…PECs are advantageous with respect to single polyelectrolytes in creating new nanostructured units (Ankerfors and Wagberg 2014;Schnell et al 2017) with high surface/volume ratio and structural sizes of biological components. PECs are used in a wide variety of industrial applications such as coatings and wastewater treatment (Ankerfors 2008).…”

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confidence: 99%

Polyelectrolyte complexes for assisting the application of lignocellulosic micro/nanofibers in papermaking

et al. 2018

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A novel procedure based on the addition of polyelectrolyte complexes (PECs) onto the pulp containing lignocellulosic micro/nanofibers (LCMNF) is presented. This procedure allows increasing paper strength avoiding an excessive loss in drainability. LCMNF were obtained from partially delignified kraft pine sawdust using a high-pressure homogenizer. Cationic complexes (CatPECs) were prepared by adding the anionic polyelectrolyte solution (polyacrylic acid) on the cationic polyelectrolyte solution (poly(allylamine hydrochloride)). According to turbidity and surface morphology changes, an interaction between CatPECs and LCMNF could be established. Different CatPEC dosages (from 0.3 to 1.0% on pulp) were added on a recycled unbleached softwood kraft pulp containing 3% of LCMNF. For a PEC dosage of 0.75% on pulp, an optimum balances between negatively and positively charged materials [near to zero value of the logarithm of the colloidal titration ratio (logCTR)] was found. Britt Dynamic Drainage Jar test showed a high retention of fines and LCMNF for all PEC dosages. A maximum in retention value was obtained for the addition of 0.75% of PECs on pulp, dosage that was suggested as optimum by the logCTR. In addition, the best drainability value (18°SR) was obtained for this PEC addition level. Papermaking properties were clearly improved for all dosage of PECs. Particularly for a dosage of 0.75% of PECs on pulp, tensile strength was noticeably increased (?48%) and both compressive resistance Concora Medium Test (CMT) and Short-span Compressive Test (SCT) were markedly increased (?64% and ?39%, respectively). These results suggest that PECs are a possible alternative to assist the application of LCMNF in papermaking.

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Films from xylan/chitosan complexes: preparation and characterization

Cited by 41 publications

References 30 publications

Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Thermoplastic Films Based on Polyelectrolyte Complexes of Arabino Glucurono‐Xylan and Polyethylenimine

Use of Micro/Nano- and Nanofibrillated Cellulose To Improve the Mechanical Properties and Wet Performance of Xylan/Chitosan Films: A Comparison

Polyelectrolyte complexes for assisting the application of lignocellulosic micro/nanofibers in papermaking

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