Bio-inspired, UV-blocking, water-stable and antioxidant lignin/cellulose films combining high strength, toughness and flexibility

Cui, Boyu; Liu, Liangxian; Li, Shuang; Wang, Wen; Tan, Liying; Liu, Chaodong; Wang, Weihong

doi:10.1039/d2qm00842d

Cited by 11 publications

(3 citation statements)

References 46 publications

(77 reference statements)

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“…The water resistance of the film is shown in Figure 4. The contact angle of the films increased with the increase of lignin content, and the maximum contact angle was 82.1° when the lignin content was 0.5 g. This may be due to the presence of lignin in the films, which is an amphiphilic polymer with polar hydrophilic side‐chain phenol hydroxyl and non‐polar hydrophobic alkyl and phenylpropane backbone 32 . The hydrophobic chain of lignin effectively prevents water molecules from destroying the hydroxyl groups in the cellulose molecular chain.…”

Section: Resultsmentioning

confidence: 97%

“…The contact angle of the films increased with the increase of lignin content, and the maximum contact angle was 82.1 when the lignin content was 0.5 g. This may be due to the presence of lignin in the films, which is an amphiphilic polymer with polar hydrophilic side-chain phenol hydroxyl and non-polar hydrophobic alkyl and phenylpropane backbone. 32 The hydrophobic chain of lignin effectively prevents water molecules from destroying the hydroxyl groups in the cellulose molecular chain. In addition, the phenolic hydroxyl groups form new hydrogen bonds with the hydroxyl groups in cellulose, it prevents water molecules from forming hydrogen bonds with cellulose and improves the water resistance of the film.…”

Section: Water Stability Testmentioning

confidence: 99%

“…It was found that the addition of lignin improved the water resistance of the films; however, the use of epichlorohydrin had an additional impact on the environment. Cui et al 32 inspired by natural biomaterials, proposed a strategy for preparing lignin/cellulose films with special strength and flexibility by establishing a sacrifice network. The films were prepared by adding zinc chloride and constructing coordination bond and hydrogen bond.…”

Section: Introductionmentioning

confidence: 99%

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Beyond waste: Transforming wheat straw into oxygen and UV‐resistant cellulose films

Tang,

Han,

et al. 2024

J of Applied Polymer Sci

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Regenerated cellulose membrane is a biomaterial obtained by activating, dissolving, solidifying, and regenerating cellulose powder using solvents of different polarities. It has the characteristics of high oxygen resistance and high strength. However, its low water vapor barrier and single function limit its application. In order to improve the water resistance of regenerated cellulose membranes and endow them with UV resistance, lignin was extracted from waste wheat straw using formic acid method. The extracted formic acid lignin (FAL) was added to the cellulose solution to prepare a series of regenerated lignocellulosic membranes (RC‐FAL) with different lignin contents. The results indicate that lignin can not only improve the water vapor barrier, tensile strength, and water resistance of the film, but also enhance the oxygen barrier and UV absorption of the film. Compared with pure cellulose film, the contact angle of lignocellulose film can be increased by 66.2%, the UV absorption rate can reach 100%, and the oxygen transmission coefficient has no significant effect. In this paper, a new kind of biological packaging material with high oxygen resistance, strong ultraviolet absorption, and water resistance was prepared by recycling waste wheat straw, it has a broad application prospect in the industrial production of packaging materials.

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Section: Resultsmentioning

confidence: 97%

Section: Water Stability Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Beyond waste: Transforming wheat straw into oxygen and UV‐resistant cellulose films

Tang,

Han,

et al. 2024

J of Applied Polymer Sci

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Bio‐Based Foams to Function as Future Plastic Substitutes by Biomimicry: Inducing Hydrophobicity with Lignin

Miranda‐Valdez,

Mäkinen,

et al. 2024

Adv Eng Mater

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To replace common plastics, bio‐based alternatives are needed. Cellulose foams, as plant‐based materials, are the most attractive solution, being often biodegradable and inexpensive and having the potential for distributed production. Cellulose and its derivatives, as raw materials, present a fundamental challenge, as they are hydrophilic. Herein, this problem is solved by drawing inspiration from the hydrophobic barrier that lignin creates in wood and applying lignin to methylcellulose (MC) foams. The lignin (0.0–1.0 wt% being the range studied here) is applied directly to the suspension consisting of water and MC (1.8 wt%), which is then foamed and solidified to a dry 3D porous structure. By comparing different types of lignin and the resulting surface morphologies, it is shown that organosolv lignin (OL) most strongly self‐assembles to the air–foam interfaces, achieving area fractions up to 27%. Using different concentrations of OL, how hydrophobicity—described by the initial water contact angle and its time evolution—increases with increasing lignin concentration is then shown. Thus, significantly increased water resistance (up to 91 times higher compared to the pure MC foam), a crucial property for developing novel bio‐based materials that can compete with traditional plastics, is able to be achieved.

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4D printed and multi-stimulus responsive shape memory polymer nanocomposites developed on hydrogen bonding–metal-phenolic sacrificial network: Application for hazardous chemical operations soft robots

Gu,

Ji,

et al. 2023

Applied Materials Today

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Bio-inspired, UV-blocking, water-stable and antioxidant lignin/cellulose films combining high strength, toughness and flexibility

Abstract: The use of low-cost, efficient methods to prepare thin-film materials to partially replace conventional materials in new applications is appealing. In this work, inspired by natural biological materials, we propose...

Cited by 11 publications

References 46 publications

Beyond waste: Transforming wheat straw into oxygen and UV‐resistant cellulose films

Beyond waste: Transforming wheat straw into oxygen and UV‐resistant cellulose films

Bio‐Based Foams to Function as Future Plastic Substitutes by Biomimicry: Inducing Hydrophobicity with Lignin

4D printed and multi-stimulus responsive shape memory polymer nanocomposites developed on hydrogen bonding–metal-phenolic sacrificial network: Application for hazardous chemical operations soft robots

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