High strength biobased films prepared from xylan/chitosan polyelectrolyte complexes in the presence of ethanol

Schnell, Carla N.; Galván, María Verónica; Solier, Yamil Nahún; Inalbon, María Cristina; Zanuttini, Miguel Angel Mario; Mocchiutti, Paulina

doi:10.1016/j.carbpol.2021.118602

Cited by 15 publications

(16 citation statements)

References 33 publications

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“…It was noteworthy that the mechanical performance of the XPs was superior to most previously reported xylan-based films (Figure e and Table S2). − Additionally, the mechanical properties of the XPs were better than that of most commercial synthetic polymer plastics such as acrylonitrile butadiene styrene (ABS), polyethylene (PE), polypropylene (PP), polyurethane thermoplastics (TPU), and Teflon (PTFE) . As a renewable packing material, XP also showed more excellent performance than those of sustainable materials, such as biopolyurethane (Bio-PU), lignin/BPP (biodegradable polyester-based plastics), − and soy protein isolate (SPI) mixed with four polyol-based plasticizers sheets (Figure f and Table S3).…”

Section: Resultsmentioning

confidence: 99%

Xylan Plastic

Jia

Rao

et al. 2023

ACS Nano

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The increasing accumulation of plastic waste has brought serious environmental issues. Biodegradable plastics are promising candidates to solve the problem but still remain a scientific challenge. Here, xylan plastic (XP) was fabricated by a strategy of double cross-linking through etherification combined with hot pressing. The mechanical properties, particularly the toughness of XP, were significantly enhanced by the incorporation of chemical and physical cross-linking domains. The tensile strength, toughness, and modulus of XP can reach up to 55 MPa, 2.2 MJ/m 3 , and 1.7 GPa, respectively, which are superior to most traditional plastics. Dynamic mechanical analysis (DMA) characterizations confirmed that XP is thermoplastic and can be hot formed. Additionally, the reversible hydrogen bond interaction between xylan chains could be simply regulated by water molecules, rendering XP readily transformed and repeatedly reprogrammed into versatile 2D/3D shapes. Moreover, XP showed a low thermal expansion coefficient and excellent optical properties. Cytotoxicity and degradability tests demonstrated that XP had excellent nontoxicity and can be biodegraded in 60 days. This work thus suggests an avenue for the scalable production of high-performance xylan-based plastics, in which the raw material comes from industrial wastes and exhibits great potential in response to plastic pollution.

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Section: Resultsmentioning

confidence: 99%

Xylan Plastic

Jia

Rao

et al. 2023

ACS Nano

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“…The material was purified by precipitating in ethanol two successive times, dried, and characterized. Extracted xylan presents a purity of 99.1% and a molecular weight of 56.3 kDa …”

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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“…In previous studies [9,10,25] it was demonstrated that pH 5.0 was optimal in the case of xylan/chitosan film formation due to the high degree of interaction of these two polyelectrolytes. Considering those results and that there is no difference in the mass ratio at the neutrality at pHs 5.0 and 7.0 (discussed in the Section 3), these two pH values were selected for polyelectrolyte complex preparation and film formation.…”

Section: Pecs Preparation and Film Formationmentioning

confidence: 98%

“…The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/mame.202200108 DOI: 10.1002/mame.202200108 plasticizers [6,7] or using it in combination with chitosan, which is another natural polyelectrolyte. [8][9][10] Despite its advantages, xylan has low solubility which is a limitation due to the high amount of water that needs to be evaporated to obtain films. In the case of chitosan, which also shows limited solubility, acid medium is needed to dissolve it.…”

Section: Introductionmentioning

confidence: 99%

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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High strength biobased films prepared from xylan/chitosan polyelectrolyte complexes in the presence of ethanol

Cited by 15 publications

References 33 publications

Xylan Plastic

Xylan Plastic

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

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

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