INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Zhenghong Wu,Shaomin Kang,Yena Liu,Peipei Wang,Tian Liu,Rani Bushra,Mohammad Rizwan Khan,Jiaqi Guo,Wenyuan Zhu,Huining Xiao,Junlong Song
This study focuses on enhancing the strength and water stability of paper straws through a novel approach involving a binary emulsion of lignin-based polyurethane and chitosan. Kraft lignin serves as the raw material for synthesizing a blocked waterborne polyurethane , subsequently combined with carboxylated chitosan to form a stable binary emulsion. The resulting emulsion, exhibiting remarkable stability over at least 6 months, is applied to the base paper. Following emulsion application, the paper undergoes torrefaction at 155 °C. This process deblocks isocyanate groups, enabling their reaction with hydroxyl groups on chitosan and fibers, ultimately forming ester bonds. This reaction significantly improves the mechanical strength and hydrophobicity of paper straws. The composite paper straws demonstrate exceptional mechanical properties, including a tensile strength of 47.21 MPa, Young's modulus of 4.33 GPa, and flexural strength of 32.38 MPa. Notably, its water stability is greatly enhanced, with a wet tensile strength of 40.66 MPa, surpassing commercial paper straws by 8 folds. Furthermore, the composite straw achieves complete biodegradability within 120 days, outperforming conventional paper straws in terms of environmental impact. This innovative solution presents a promising and sustainable alternative to plastic straws, addressing the urgent need for eco-friendly products.
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高影响因子
Polymers
·
2025
·Vol. 17
·期 7
·888
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IF 4.9
Muzammil Hussain Memon,Md. Asraful Alam,Qiyuan Xie,Abdul Rahman Abbasi,Lele Wang,Jingliang Xu,Wenlong Xiong
Multi-component electrolyte additives may significantly contribute to improving the performance of rechargeable aqueous zinc-ion batteries. Herein, we propose a mixed electrolyte system employing polyethylene glycol 200 (PEG200) and quaternized kraft lignin (QKL) as co-additives in Zn//MnO2batteries. Reduced corrosion and the suppression of the hydrogen evolution reaction on the zinc electrode were achieved when 0.5 wt.% of PEG200 and 0.2 wt.% of QKL were added to the reference aqueous electrolyte. This optimized electrolyte, 0.5% PEG200 + 0.2% QKL, was conducive to improving Zn reversibility in Zn//Zn symmetric batteries and resulted in higher cycling stability, with a coulombic efficiency of 98.01% under 1 mA cm−2and 1 mAh cm−2for Zn//Cu cells. Furthermore, Zn//MnO2full batteries with 0.5% PEG200 + 0.2% QKL presented good overall electrochemical performance and exhibited a decent discharge capacity of around 85 mAh g−1after 2000 cycles at 1.5 A g−1. As confirmed by X-ray diffraction and scanning electron microscopy, a dominant (002) oriental dendrite-free Zn deposition was achieved on the zinc anode of the battery using 0.5% PEG200 + 0.2% QKL, and the byproducts were also reduced significantly. This study has contributed to the development of electrolyte co-additives for zinc-ion batteries.
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ACS Omega
·
2024
·
IF 3.7
Kaiqin Song,Liping Yu,Shoulu Yang,Yan Cao,Lifen Li,Zhigang Wu,Hongtao Shi,Qiaorun Ma
Deep eutectic solvents (DESs) composed of choline chloride as hydrogen bond acceptors (HBAs) and six organic acids as hydrogen bond donors (HBDs) were used to extract lignin from bamboo (Phyllostachys edulis (Carrière) J. Houz.). The structures of the DES-extracted lignin samples were analyzed by Fourier-transform infrared spectroscopy (FT-IR), UV–visible spectroscopy (UV–vis), thermogravimetric analysis (TG), and gel permeation chromatography (GPC) to investigate the relationship between the chemical structure of lignin and its antioxidant activity. The results showed that DES treatment removed a large portion of the lignin (73.37–86.38%) from bamboo, and the chemical structure of lignin was changed due to the use of different types of HBDs. The extracted lignin exhibited good UV–vis light shielding properties, thermal stability, and antioxidant activity. Moreover, the total phenolic hydroxyl content of lignins was positively correlated with their antioxidant activity, while the molecular weight of lignins was negatively correlated with their antioxidant activity. Notably, lignin extracted with choline chloride-p-toluenesulfonic acid had the highest phenolic hydroxyl content and lower molecular weight, showing the strongest antioxidant activity (IC50 DPPH = 417.69 μg/mL, IC50 ABTS = 58.62 μg/mL). This study confirms the high thermal stability, excellent antioxidant activity, and UV shielding properties of lignin extracted with choline chloride-organic acid DESs, suggesting its potential application in the fields of antioxidants and material modifiers.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zichun Lu,Lingke Liu,Runtian Miao,Ning Zhang,Minjuan Gao,Xingyu Fan,Yueqin Li
The ultrafast preparation of electrically conductive hydrogels to endow high sensing performance and temperature tolerance remains a critical challenge. Herein, lignosulfonate sodium-templated polypyrrole (LS-PPy) nanofillers were rapidly introduced into polyacrylic acid (PAA) hydrogel through ultrafast free radical polymerization in a glycerol/water binary solvent system. The resultant LS-PPy/PAA electrically conductive organohydrogel possesses satisfactory mechanical performance (strength of 56 kPa at a tensile strain of 800 %), strong adhesion, and a desirable low freezing point (−35 °C). Furthermore, this organohydrogel exhibits high strain sensitivity (gauge factor = 2.65), fast response time (∼160 ms), low signal hysteresis, and excellent cyclic stability (over 1200 cycles). And the wearable LS-PPy/PAA organohydrogel sensor could accurately and real-time monitor various intense or subtle human movements, such as joint bending, facial expression and hand writing. Besides, the developed LS-PPy/PAA temperature sensor can respond to environmental temperature variations over a wide range of −20–100 °C. High resolution of 0.5 °C with remarkable sensitivity (−0.80 %/°C and linearity of R 2 = 0.99) and repeatability were achieved within 36.5–40 °C, which makes it suitable for human body temperature monitoring. All these results demonstrate the substantial prospective value of the LS-PPy/PAA hydrogel in wearable sensors and other associated fields.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xinyu Cheng,Tianqi Li,Chi Zhang,Qing Zhang,Shaoning Wang,Enqing Zhu,Lili Zhang,Zhiguo Wang
The mechanical flexibility and high conductivity of hydrogel electrolytes are crucial for their application in supercapacitors. In this study, we developed hydrogel electrolyte based on lignocellulose nanofibers (LCNFs) through nanofibrillation and self-catalytic gelation in a glycerinum/choline chloride/aluminum chloride hexahydrate (Gly/ChCl/AlCl 3 ·6H 2 O) metal-based neutral deep eutectic solvent (DES) system. The lignin-Al 3+ self-catalytic mechanism offered an eco-friendly and sustainable method for synthesizing hydrogel electrolytes, while enhancing their ionic conductivity. The high aspect ratio of LCNFs significantly improved the mechanical strength of the hydrogel electrolyte by facilitating the intertwining of LCNFs with acrylamide molecules. The resulting hydrogel electrolyte demonstrated exceptional mechanical strength (485 kPa), high ionic conductivity (26.1 ms/cm), strong adhesion (225 kPa), and excellent environmental stability (up to −80 °C). A supercapacitor assembled with this hydrogel showed a remarkable specific capacitance (200 F/g) and exhibited high sensitivity in electrical signal applications. This work demonstrates the transformation of wood fiber into functional lignocellulose-based materials, highlighting the high-value utilization of lignocellulose resources for energy storage and other applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qi Xin,Huiwen Li,Wan Sun,Xuezhi Li,Xianqin Lu,Jian Zhao
Lignin, as an amorphous three-dimensional aromatic polymer, was able to self-assemble into lignin nanoparticles (LNPs) to realize valorization of lignin. Here, lignin-xylan extractives were extracted from grape seed (GS) and poplar by acidic THF at room temperature, and effectively produced lignin-xylan nanospheres via spin evaporation. The morphology and chemical properties of nanospheres were determined by its natural origins, consequently influencing its application. For the lignin-xylan extractive from grape seed, the lignin was composed of guaiacyl (G) and p -hydroxylphenyl (H) units and the hollowed nanospheres (GS-LNPs) with 362.72 nm diameter was produced. The extractive from poplar was composed of G-syringyl (S) typed lignin (80.30 %) and xylan (12.33 %), that can assemble into LNPs with smaller size (229.87 nm), better PDI (0.1), and light color. The hybrid particles showed the qualities of lignin and xylan, that properties led to the LNPs@PVA composite films with UV-blocking capability, strong mechanical strength and hydrophobicity, and transparency ability of visible light. P-LNPs showed better performance as the film additives, due to its lower particles size and high content of unconjugated -OH from xylan. Xylan was significant in the composite films, and lowering the xylan content resulted in the decrease of the composite film's mechanical properties and hydrophobicity.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Kunyun Ren,Yongdong Shi,Chaoyao Wen,Xinchang Kang,Yu Tian,Youjun Guan,Chengyun Ning,Xuebin Yang,Lei Zhou,Rumin Fu,Guoxin Tan
Conductive hydrogels possessing conductivity, flexibility, and biocompatibility have garnered considerable attention in recent years for their applications in flexible wearable devices. However, most reported conductive hydrogels are mainly elastic hydrogel substrates with chemically cross-linked networks, poor shape adaptability, and irreversible electromechanical properties after molding, thereby limiting their prospective utility in flexible electronics. In this study, we fabricate multifunctional lignin-gelatin-polypyrrole (LGP) hydrogels with plasticity, recyclability, strong adhesion, and biocompatibility via a straightforward methodology employing gelatin, polypyrrole, and sodium lignosulfonate. The resultant LGP hydrogel is interlinked by dynamic noncovalent bonds, yielding remarkable plasticity and recyclability, and could be manipulated by hand to fashion diverse shapes. Additionally, the LGP hydrogel displays substantial adhesion (23.88 kPa to pig skin) and maintains strong adhesion to wide substrates. The LGP hydrogel strain sensor demonstrates high sensitivity (GF = 6.08) and rapid response (107 ms), providing a stable resistive signal output for both large (25–200%) and small (1–5%) strains across diverse operating conditions. Moreover, the LGP hydrogel can be seamlessly integrated as a flexible, wearable strain sensor to facilitate real-time monitoring of human physiological activities.
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Advanced Energy Materials
·
2024
·Vol. 14
·期 32
·2303442
·
IF 24.4
Xuliang Lin,Dalang Chen,Xueqing Qiu,Bowen Liu,Jianglin Liu,Xiaofei Wang,Shirong Sun,Yanlin Qin
Common precursors for carbon materials typically include petroleum-based polymers or MOF materials. However, these materials often encounter challenges such as metal aggregation, high cost, and metals leaching. In this work, a novel of approach lignin-metal supramolecular framework complex (MSF@Lignin) is introduced. These complexes are formed through oxidative ammonolysis of lignin (OAL) to synthesize a nitrogen-doped carbon-encapsulated CoRu nanocatalyst (CoRu@OALC) via in situ carbonization. CoRu@OALC exhibited exceptional performance in both HER (90 mV) and OER (200 mV) at the current density of 10 mA cm −2 , with an overall water splitting voltage of 1.5 V and outstanding stability under high density. During the pyrolysis process, metal became encapsulated by lignin-derived carbon, occurring within the temperature range of 600–700 °C. In the catalytic process, active sites are primarily located within the defects in lignin-derived carbon, showcasing a unique “self-healing” phenomenon within the carbon layer. Oxygen-containing intermediates ( * OH, * O, and * OOH) facilitated the reconstruction of defects on the carbon layer, while the hydrogen-containing intermediates ( * H) contributed to the reappearance of a defect-rich structure.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xuanhao Huang,Xinyi Guo,Yao Meng,Shaobo Lou,Xinxing Wu,Yan Zhang,Renzhong Wei,Shuaibo Han,Fangli Sun,Hui Wang
Bamboo, which has excellent physical properties and environmental credentials, is widely used in the construction industry and furniture manufacturing. Bamboo is, however, susceptible to attack by molds and bacteria; protection by natural phenolic antimicrobial agents would be a green and environmentally friendly solution to this problem. The application of such protection has, so far, been hampered by poor stability and ease of volatilization of the antimicrobial agent. Here, an innovative strategy that uses the catalytic action of the laccase to chemically attach a natural antimicrobial agent, eugenol (EU), to bamboo, is described. This modification endows bamboo with both long-lasting and extensive mold resistance and antibacterial activity. Laccase-catalyzed covalent bonding of EU to bamboo reduces the volatilization rate of the EU from 1.72 % to 0.29 %. The outstanding mold resistance and antimicrobial activity of bamboo treated using this modified process is retained during a 50-day mold resistance test, with mold growth inhibited by as much as 87.5 %. The treated bamboo is also able to inhibit the growth of both Gram-positive and Gram-negative bacteria. The antimicrobial mechanism results shown that the bamboo lignin is the primary reaction site during laccase-catalyzed EU modification of bamboo, and the long-term mold resistance derived from modified lignin. Furthermore, we analyzed bacterial morphology through SEM, and the results demonstrated that modified enzymatic hydrolysis lignin (EHL) significantly disrupts bacterial morphology, including membrane invagination and collapse. This study provides a new direction for the green development of mold- and bacteria-resistant bamboo, which has potential for use in a wide range of application.
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Ling Zheng,Farzad Seidi,Hongmiao Wu,Yang Huang,WeiBing Wu,Huining Xiao
Fungicides are among the most essential agrochemicals for controlling crop diseases. However, the increased consumption of fungicides has resulted in environmental pollution and adversely affected human health. The slow-release technology can improve the efficacy and reduce the required amount of fungicide. Here, we developed a low-swelling redox-responsive alginate/lignin network bearing covalently conjugated fungicide thymol-Cl. Natural reductants in the environment caused the selective cleavage of disulfide bonds and release of thymol-Cl and thiazolidin-2-one (a by-product), which both could inhibit the phytopathogenic fungus ( F. oxysporum ). At the same time, metal chelating groups in the gel endow strong interactions with heavy metal ions for improving soil remediation and preventing the adsorption of toxic metals by the plant roots. The fungicide-loaded carrier could alleviate the poisonous effect of fungi on maize seeds. Indeed, the secretion of natural reducing agents by fungi and maize led to the cleavage of disulfide bonds and the release of fungicides.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fanjun Yu,Zhichen Ba,Zhizun Gao,Yonggui Wang,Yanjun Xie,Haigang Wang,Zhe Qiu,Zefang Xiao
The development of effective and eco-friendly wood-based functional composites is crucial for maximizing the value of forest resources. In this paper, we propose a novel method for preparing an aqueous-phase flame retardant (MPUC) using carboxymethylation alkali lignin, phytic acid, and melamine-urea-glyoxal resin. This approach aims to manufacture modified wood (MW/MPUC) with exceptional flame-retardant and smoke-suppressing properties. The results from the cone calorimeter test indicate that the modified wood achieved a remarkable reduction of up to 56.8 % in total heat release and an impressive 92.3 % decrease in total smoke production. Furthermore, the limiting oxygen index increased significantly from 23.6 % (natural wood) to 41.5 % (MW/MPUC-2). Notably, all modified wood successfully passed the V-1 test for UL-94 flammability rating. Further, our investigation into the gas-phase products formed during pyrolysis and the condensed-phase system created after combustion has led us to propose potential flame-retardant mechanisms for these flame retardants. Moreover, modified wood had improved mechanical properties and dimensional stability than natural wood. In addition, we extended the application of MPUC-2 flame-retardant to other flammable materials and demonstrated its excellent flame-retardant properties. Thus, the proposed strategy provided a new approach for preparing wood-based flame-retardant composites with lignin-based N-P flame retardants.
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Polymer Chemistry
·
2024
·
IF 4.1
Quan Yan,Bailiang Xue,Tonghe Zhang,Wenliang Wang,Xinping Li,Xiaojun Shen,Lulu Ning,Xianzhi Meng,Wei Zhao
The star–star coupling is often regarded as an undesirable side reaction in in the synthesis of star polymers. To mitigate this issue, strategies such as operating at low temperatures, maintaining low monomer concentrations, and limiting monomer conversion are typically employed, albeit at the cost of reduced synthetic efficiency in producing the desired polymer materials. In this study, we propose a novel approach to harness this side reaction for the creation of a lignin-containing, sustainable, and solvent-resistant dynamic dual network using a one-pot synthesis strategy. Initially, a lignin-based macroinitiator with low polydispersity index (PDI) was synthesized to facilitate the precise formation of well-defined star polymers functionalized with epoxy groups. Subsequent to this, the first network, composed of star-shaped lignin-grafted copolymers, was successfully established through the utilization of the free radical bimolecular termination reaction. Following this, the second dynamic crosslinked network was formed via vitrimer chemistry between epoxy and carboxylic acid. The resulting dynamic dual network, accessible through a straightforward one-pot method, exhibited excellent reprocessability and solvent resistance, rendering it suitable for applications as high-performance adhesives. This study introduces a novel strategy for the synthesis of dynamic dual networks based on star-shaped lignin-grafted copolymers, offering promising prospects for the advancement of sustainable biomaterial synthesis.
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