Construction of chevaux-de-frise from cellulose nanocrystals to enable mechano-bactericidal activity on recycled waste cotton films

Zhou, Chufan; Girouard, François; O’Brien, Bridget; Ronholm, Jennifer; Wang, Yixiang

doi:10.1039/d2gc00073c

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…Therefore, the question of how to upcycle these low-value materials into value-added applications to address the growing concerns over sustainability and resource optimization has received tremendous attention [2,3]. So far, upcycling low-quality cotton fibers into dye adsorbents [4,5], composite paper [6], energy devices [7], and antibacterial agents [8] have been reported. However, these low-quality cotton fibers are still overlooked due to their perceived lack of economic viability.…”

Section: Introductionmentioning

confidence: 99%

Upcycling Low-Quality Cotton Fibers into Mulch Gel Films in a Fast Closed Carbon Cycle

Rumi,

Liyanage,

Zhang

et al. 2024

Gels

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Low-quality cotton fibers, often overlooked as low-value materials, constitute a marginalized waste stream in the cotton industry. This study endeavored to repurpose these fibers into mulch gel films, specifically exploring their efficacy in covering moisture-controlled soil beds. Through a meticulously designed series of processing methods, cellulose/glycerol film was successfully fabricated by regenerating cellulose hydrogels in N,N-dimethylacetamide/lithium chloride solutions, followed by plasticization in glycerol/water solutions and hot pressing. The film was then employed to cover soil beds for a duration of up to 252 days, followed by soil burial assessments. Despite expectations of degradation, the film maintained structural integrity throughout the soil covering period but underwent complete biodegradation after 80 days of soil burial, thereby completing a closed carbon cycle. Intriguingly, both tensile strength and modulus exhibited no diminishment but instead increased after soil covering, contrary to expectations given the usual role of degradation. Mechanistic insights revealed that the removal of glycerol contributed to the mechanical enhancement, while microbial activity predominately decomposed the amorphous regions in soil covering and targeted the crystalline portions in soil burial, elucidating the main biodegradation mechanisms. In summary, this study presents, for the first time, the potential of upcycling low-quality cotton fibers into high-value mulch gel films for agricultural practices within a closed carbon cycle.

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Section: Introductionmentioning

confidence: 99%

Upcycling Low-Quality Cotton Fibers into Mulch Gel Films in a Fast Closed Carbon Cycle

Rumi,

Liyanage,

Zhang

et al. 2024

Gels

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“…Cellulose comes from a wide range of sources such as plants and bacterias, so bioplastic derived from cellulose is considered to be of commercial potentials (Zhou et al, 2022). Heidarian et al reported a degradable composite made of cellulose extracted from sugarcane and PLA with the Young's modulus of 716.5 MPa, fracture strength of 32.6 MPa, and elongation at break of 4.5%, which degrades in more than two months (Heidarian et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Citric acid cross-linked regenerated bacterial cellulose as biodegradable film for food packaging

Yu,

Yang,

Wang

et al. 2023

Cellulose

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The global depletion of petrochemical resources, coupled with the environmental problems caused by the widespread use of traditional plastics, have brought more attention to exploring biodegradable materials. However, the high preparation cost and complex manufacturing processes leave us few choices of raw materials of biodegradability. Herein, regenerated bacterial cellulose (RBC) was used to prepare a kind of environmentally-friendly material that degrades rapidly. Further addition of citric acid (CA) enhances its mechanical properties and degradability, resulting in a CA-cross-linked regenerated cellulose (CA-RC) lm with a fracture strength of 93.40 MPa and Young's modulus of 4.2 GPa, which behaves better than commercial plastic wrap in food preservation. In addition, the lm could be completely degraded in soil within two weeks, of which the biocompatibility is veri ed by both cell proliferation and hemolysis experiments. The results show that the CA-RC lms have great application prospects in food packaging and biomedical materials.

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Sulfated cellulose nanocrystal isolated from waste cotton fabrics by deep eutectic solvent and its application in polymer nanocomposite films

Zhao,

Zhang,

Pan

et al. 2024

Vinyl Additive Technology

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The growing utilization of textiles raises concerns about the ecological hazards of textile production methods and discarded textiles. The recycling and reusing of waste cotton materials align with the sustainable development of society. In this study, sulfated cellulose was synthesized by sulfating waste cotton using a deep eutectic solvent (DES). After nanofibrillation with ultrasonication, sulfated cellulose nanocrystal (SCNC) with an average width of 10.83 nm and an average length of 129.40 nm was produced. The thermal properties of the synthesized SCNC were significantly enhanced compared to the pristine cellulose, with a notable reduction of 87.1% in the peak heat release rate, as well as an 86.6% reduction in the total heat release. Additionally, when utilized as a reinforcement in poly(vinyl alcohol) (PVA) films, SCNC demonstrated a substantial rise in yield strength (from 62.3 to 94.8 MPa) and Young's modulus (from 2.7 to 4.4 GPa) of the PVA films. Furthermore, the incorporation of SCNC into composites increased the thermal stability while maintaining the high transparency (with light transmission higher than 84%), which has good potential for application in the electronic packaging field.Highlights SCNC were successfully prepared from waste cotton using DES. Extracted SCNC were characterized using TEM, FTIR, XRD, TGA and MCC. SCNC enhanced the yield strength and thermal stability of PVA composites. Transparent and mechanically robust PVA‐based nanocomposites were created.

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Construction of chevaux-de-frise from cellulose nanocrystals to enable mechano-bactericidal activity on recycled waste cotton films

Abstract: A chevaux-de-frise-like nanostructure is designed by depositing cellulose nanocrystals (CNCs) on regenerated cellulose (RC) films, both recycled from waste cotton fabrics, with the assistance of vacuum filtration to mechanically combat...

Cited by 8 publications

References 34 publications

Upcycling Low-Quality Cotton Fibers into Mulch Gel Films in a Fast Closed Carbon Cycle

Upcycling Low-Quality Cotton Fibers into Mulch Gel Films in a Fast Closed Carbon Cycle

Citric acid cross-linked regenerated bacterial cellulose as biodegradable film for food packaging

Sulfated cellulose nanocrystal isolated from waste cotton fabrics by deep eutectic solvent and its application in polymer nanocomposite films

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