Water-stable, strong, biodegradable lignocellulose straws replacement for plastic straws

Dong, Tengteng; Chen, Wei; Cai, Chenchen; Bai, Feitian; Zhou, Zheng; Wang, Jinlong; Liu, Xusheng

doi:10.1016/j.cej.2022.138970

Cited by 33 publications

(17 citation statements)

References 69 publications

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“…After one month of burial in the soil, three composite films became fractured, likely due to the existence of microorganisms, which could directly digest and degrade the cellulose and lignin macromolecules in composite films [ 31 ]. This result was consistent with the work reported by Dong et al in that paper straw made from pine was fully biodegradable after 30 days [ 32 ]. In comparison, PE film maintained original shape without any reduction in mass after being buried for the same amount of time, suggesting this non-biodegradable plastic posed a long-lasting burden on the environment ( Figure 6 a,b).…”

Section: Resultssupporting

confidence: 93%

Biodegradable, Flexible and Ultraviolet Blocking Nanocellulose Composite Film Incorporated with Lignin Nanoparticles

Bian

Shu

et al. 2022

IJMS

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The exploration of functional films using sustainable cellulose-based materials to replace plastics has been of much interest. In this work, two kinds of lignin nanoparticles (LNPs) were mixed with cellulose nanofibrils (CNFs) for the fabrication of composite films with biodegradable, flexible and ultraviolet blocking performances. LNPs isolated from p-toluenesulfonic acid hydrolysis was easily recondensed and deposited on the surface of composite film, resulting in a more uneven surface; however, the composite film consisting of CNFs and LNPs isolated from maleic acid hydrolysis exhibited a homogeneous surface. Compared to pure CNF film, the composite CNF/LNP films exhibited higher physical properties (tensile strength of 164 MPa and Young’s modulus of 8.0 GPa), a higher maximal weight loss temperature of 310 °C, and a perfect UVB blocking performance of 95.2%. Meanwhile, the composite film had a lower environmental impact as it could be rapidly biodegraded in soil and manmade seawater. Overall, our results open new avenues for the utilization of lignin nanoparticles in biopolymer composites to produce functional and biodegradable film as a promising alternative to petrochemical plastics.

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Section: Resultssupporting

confidence: 93%

Biodegradable, Flexible and Ultraviolet Blocking Nanocellulose Composite Film Incorporated with Lignin Nanoparticles

Bian

Shu

et al. 2022

IJMS

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“…This phenomenon shows that the crosslinked structure has limited free hydroxyl groups to interact with water molecules on the surface (Figure 2a). Furthermore, great improvements in the hydrophobic performance surpassing the previous report 1 were attained upon heat treatment due to the dense network structure formed during the esterification reaction. To gain more insights into the improved hydrophobic performance of E-SCL and E-PCL, we investigated the changes in the morphology of the films via SEM, with the results depicted in Figure 4d.…”

Section: ■ Results and Discussionmentioning

confidence: 79%

“…However, no air bubbles were generated when E-SCL straws were used in cola drinks, displaying they are functional and quintessential candidates for replacing plastic straws. Even though LCS and Ch-20A straws were hydrostable, the straws absorbed over 60 and 53.6% of water in 120 min and 5 h, respectively. These findings show that our E-SCL and E-PCL straws and thermoset films are more hydrophobic and hydrostable for longer periods, as evident in Figure a–c.…”

Section: Resultsmentioning

confidence: 95%

“…Furthermore, the straws require a layer of alginate coating to compensate for their hydrophilicity. In contrast to the recently reported lignocellulose straws (LCS) and Chitin-based straws, the processing and fabrication time for the straws is cumbersome. Based on these aspects, E-SCL straws may provide a simpler, cost-effective, and scalable approach in microplastic-free straw manufacturing since starch is relatively cheap compared to cellulose.…”

Section: Resultsmentioning

confidence: 99%

“…Plastics possess a unique balance of attractive propertieslow cost, durability, high versatility, and strengthmaking them ubiquitous materials for daily use. − If the prevailing trends of plastic production and consumption continue, the Anthropocene era will be inevitable. In parallel, a growing global concern has arisen as immense volumes of plastic waste have caused considerable environmental damage .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrastrong, Hydrostable, and Degradable Straws Derived from Microplastic-Free Thermoset Films for Sustainable Development

2023

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Single-use plastics such as straws have caused intricate environmental challenges since they are not readily assimilated into nature at the end of life. Paper straws, on the contrary, become soggy and collapse in drinks resulting in an obnoxious user experience. Here, all-natural, biocompatible, degradable straws and thermoset films are engineered by integrating economical natural resourceslignin and citric acidinto edible starch and poly(vinyl alcohol), making them the casting slurry. The slurries were cast on a glass substrate, partially dried, and rolled on a Teflon rod to fabricate the straws. The straws are perfectly adhered at the edges by the strong hydrogen bonds from the crosslinkercitric acidduring drying, thus eliminating the need for adhesives and binders. Further, curing the straws and films in a vacuum oven at 180 °C results in enhanced hydrostability and endows the films with excellent tensile strength, toughness, and ultraviolet radiation shielding. The functionality of the straws and films surpassed paper and plastic straws, making them quintessential candidates for all-natural sustainable development.

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Equilibrium Moisture Mediated Esterification Reaction to Achieve Over 100% Lignocellulosic Nanofibrils Yield

Zheng,

Zhu,

Sun

et al. 2024

Small

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Lignocellulosic nanofibrils (LCNFs) isolation is recognized as an efficient strategy for maximizing biomass utilization. Nevertheless, achieving a 100% yield presents a formidable challenge. Here, an esterification strategy mediated by the equilibrium moisture in biomass is proposed for LCNFs preparation without the use of catalysts, resulting in a yield exceeding 100%. Different from anhydrous chemical thermomechanical pulp (CTMP0%), the presence of moisture (moisture content of 7 wt%, denoted as CTMP7%) introduces a notably distinct process for the pretreatment of CTMP, comprising the initial disintegration and the post‐esterification steps. The maleic acid, generated through maleic anhydride (MA) hydrolysis, degrades the recalcitrant lignin‐carbohydrate complex (LCC) structures, resulting in esterified CTMP7% (E‐CTMP7%). The highly grafted esters compensate for the mass loss resulting from the partial removal of hydrolyzed lignin and hemicellulose, ensuring a high yield. Following microfluidization, favorable LCNF7% with a high yield (114.4 ± 3.0%) and a high charge content (1.74 ± 0.09 mmol g−1) can be easily produced, surpassing most previous records for LCNFs. Additionally, LCNF7% presented highly processability for filaments, films, and 3D honeycomb structures preparation. These findings provide valuable insights and guidance for achieving a high yield in the isolation of LCNFs from biomass through the mediation of equilibrium moisture.

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Water-stable, strong, biodegradable lignocellulose straws replacement for plastic straws

Cited by 33 publications

References 69 publications

Biodegradable, Flexible and Ultraviolet Blocking Nanocellulose Composite Film Incorporated with Lignin Nanoparticles

Biodegradable, Flexible and Ultraviolet Blocking Nanocellulose Composite Film Incorporated with Lignin Nanoparticles

Ultrastrong, Hydrostable, and Degradable Straws Derived from Microplastic-Free Thermoset Films for Sustainable Development

Equilibrium Moisture Mediated Esterification Reaction to Achieve Over 100% Lignocellulosic Nanofibrils Yield

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