INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Bailiang Xue,Rui Tang,Danwei Xue,Ying Guan,Yongchang Sun,Wei Zhao,Jiaojun Tan,Xinping Li
Epoxy vitrimers based on dynamic covalent bond chemistry have been developed in recent years as they can solve the problem of recycling and reuse for traditional thermosetting materials. Lignin as an aromatic raw material has recently used to partially replace commercial diglycidyl ether bisphenol A (DGEBA) in the epoxy vitrimers, however, it is difficult to achieve high lignin replacement rate, excellent mechanical property and reprocessability in a facile method at the same time. In this work, high mechanical strength and lignin replacement rate of lignin-based vitrimers were successfully synthesized by gradually replacing DGEBA with glycidyl ether of lignin. The mechanical properties of the lignin-based epoxy vitrimers can be tuned by different ratios of glycidyl ether of lignin and DGEBA, the Young’s modulus and tensile strength of those vitrimers can reach up to 2.00 GPa and 46.8 MPa, respectively. It's worth noting that the tensile strength and elongation at break were 39.5 MPa and 5.81 % when the lignin replacement rate was 100 %. All the lignin-based epoxy vitrimers exhibit excellent self-healing, reprocessing and shape memory property. The crack widths of the vitrimers were repaired over 80 % in just 5 min at 160 ℃, the tensile strength can reach up to 97 % healing efficiency after being hot reprocessed. The great properties of lignin-based epoxy vitrimers indicate that they can be used as renewable alternatives for bisphenol A epoxy vitrimers.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Liuping Du,Tianhong Wang,Siyu Luo,Zitong Liu,Bowen Wang,Yanli Ma,Shixue Ren,Lina Jia,Shujun Li
The development of photoresponsive shape memory materials based on the photothermal conversion properties of lignin and the low activation energy of the dynamic covalent borate bond is of great importance. In this paper, a kind of lignin-based vitrimer polymer (LBP) containing dynamic boronic ester bonds was prepared by a “sulfhydryl-epoxy” click reaction and etherification reaction. The results show that the rigid segment EP-EL (lignin-based epoxy resin) and BDB (2,2′-(1,4-phenylene)-bis-[4-mercapto-1,3,2-dioxaneborane]) with benzene ring structure can impart tensile strength (20.8 MPa) to the LBP, while the flexible segment PEG imparts good elongation at break (15 %). The dynamic binding and dissociation exchange mechanism of the boronic ester bonds enables LBP to exhibit thermal remodelling properties (up to 36.2 %) and water-assisted self-healing properties at room temperature (up to 49.0 %). In addition, LBP exhibits excellent thermal and light-responsive shape memory properties due to its own photothermal conversion performance (photothermal conversion efficiency up to 18.2 %) and the dynamic boronic ester bond thermal activation bond exchange mechanism. The insulating properties of LBP make it suitable for use in high temperature protection circuit devices and light-responsive circuit devices. This study provides new insights into the design and application of Vitrimer and photoresponsive shape memory polymers, and also offers a new avenue for high-value utilization of lignin.
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高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2025
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IF 1.8
Jiahao Liu,Jun Zhang,Na Li
An environmentally friendly aerogel (CE/LN), composed of cellulose (CE) and lignin (LN) was synthesized via one-pot cross-linking method at room temperature, followed by freeze-drying. The CE/LN aerogel exhibited good mechanical properties and abundant functional groups, making it an effective adsorbent for the adsorption and removal of the antibiotic trimethoprim (TMP) from water. This study systematically investigated the effects of solution pH, aerogel dose, contact time, initial TMP concentration, temperature, ionic strength, and various water sources on TMP adsorption. The CE/LN aerogel demonstrated a higher TMP adsorption capacity of TMP than the CE aerogel across the entire pH range of 2.0–10.0. The adsorption process was well described by the Langmuir isotherm model and pseudo-second-order kinetic model. The CE/LN 6% aerogel achieved the highest adsorption capacity, with a theoretically maximal TMP uptake of 0.402 mmol/g at pH 6.0. However, high concentration of NaCl significantly reduced TMP uptake on the CE/LN 6% aerogel due to the electrostatic shielding effect. After five cycles of adsorption, the CE/LN 6% aerogel maintained a high adsorption capacity, retaining 80% of its initial uptake. Combined with the adsorption performance, the Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy analyses spectroscopy analysis before and after TMP adsorption, it can be concluded that the adsorption mechanism involved hydrogen bonding, electrostatic interactions, and π–π electron donor–acceptor interactions. Thus, the CE/LN aerogel, with its simple preparation method, good adsorption capacity, and reusability, shows great potential for widespread application in the removal of antibiotics from water.
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AQUATIC TOXICOLOGY
·
2015
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IF 3.451
Dan Li,Qin Chen,Jinling Cao,Hongxing Chen,Lixia Li,Nina Cedergreen,Haibo Xie,Lingtian Xie
One of the ultimate goals of green chemistry is to produce greener and more environmentally friendly chemicals to replace the existing toxic chemicals. In this study, Japanese medaka were exposed to 1.5 mg/L of bisphenol A or lignin-derived bisphenol for 60 days, and the expressions of various biochemical markers, effects on reproduction, and histopathology were evaluated. The results showed that concentrations of liver vitellogenin of LD-BP exposed males were approximately 125% higher compared to the control males. Total number of eggs from the BPA and LD-BP exposed fish was approximately 47% ( p < 0.001) and 25% ( p < 0.05) less than the control fish, respectively. Total number of brood was lower from the BPA (46%, p < 0.05) and LD-BP (17%, p < 0.05) exposed fish than that of the control fish. Relative to the control fish, catalase and glutathione- S -transferase were significantly affected by the two chemicals in all tested tissues. BPA and LD-BP caused lipid peroxidation in all the tested tissues. Furthermore, acetylcholinesterase and α-glucosidase activity were significantly inhibited. Histopathological analysis showed that both the testis and ovary were mildly damaged by both chemicals. LD-BP affected medaka slightly more severe than BPA except on the reproduction, which was most likely due to different uptake, translocation, binding to targets and metabolism. Our results demonstrated that chronic exposure to both chemicals caused several adverse effects to medaka. Further research on the toxicity of LD-BP to other aquatic organisms is needed before substitution of traditional BPA with LD-BP can be recommended.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xueqian Li,Junying Li,Xiaoying Shen,Mengyao Cao,Yu Wang,Wansong Zhang,Yanglei Xu,Zhe Ling,Sheng Chen,Feng Xu
Light-management films that can control solar transmission through themselves, especially those based on renewable and biodegradable materials, are significant for diverse photon-related applications such as energy-efficient buildings, photovoltaics, and optoelectronic devices. Herein, composite transparent films with adjustable haze and UV-blocking capabilities are developed based on the main components of lignocellulosic biomass (cellulose and lignin), and their promising applications in light management are also demonstrated. Carboxymethyl cellulose (CMC) with a good film-forming property is used as the substrate matrix, and cellulose nanocrystals (CNC) with a nanoscale rod-like shape are used as functional fillers. The obtained CMC–CNC composite films exhibit adjustable optical properties (high transparency of >90% and haze of 3.17–13%) and surprisingly enhanced mechanical strength and thermal stability when compared with pure CMC films. Furthermore, lignosulfonates (LS), as industrial lignin products, are combined to endow the CMC–CNC–LS composite films with excellent UV-shielding performance (98.17% UVB and 89.38% UVA), but they well maintain the high transparency and haze. We demonstrate that the composite films are able to avoid color changes of UV test cards by shielding UV light and that they achieve uniform illumination when light transmits through, indicating their promising potential for practical applications in light management. In addition, the effect of CNC and LS contents on the morphological, chemical, mechanical, and thermal properties of composite films is investigated. Our work provides novel insights into the fabrication of sustainable light-management films based on lignocellulose-derived materials by tuning their light-scattering and light-absorbing properties.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Rui Lou,Taoyuan Niu,Fengyu Zhao,Long He,Yuejin Yuan,Guodong Wei,Gaojin Lyu
Lignin as a natural biopolymer is becoming increasingly in demand due to its eco-friendly properties, while lignin-based electrolyte with high conductivity and reliable durability for applications in supercapacitors is still challenging. Herein, a facile method to prepare lignin nanoparticles (LNPs)-based solid electrolyte thin film (LF) was proposed through chemical cross-linking reaction. The fabricated LF exhibited a distinctive spongy porous structure with the ionic conductivity of 3.26 mS cm −1 , demonstrating the exceptional flexibility and favorable mechanical properties. Moreover, the assembly of all-LNPs-based symmetric supercapacitor (SSC) devices was achieved using LF electrolyte and LCA electrodes for the first time, confirming the LF3 electrolyte superior to commercial cellulose separator in capacitive behaviour. This SSC device exhibited a specific capacitance of 122.7 F g −1 at 0.5 A g −1 and the maximum energy density of 17.04 W h kg −1 . Furthermore, the incorporation of sodium alginate (SA) significantly enhanced the ionic conductivity of SA/LF3 electrolyte, and the resulting SSC device delivered a higher specific capacitance of 174.5 F g −1 at 0.5 A g −1 and the maximum energy and power densities of 24.24 W h kg −1 and 5023 W kg −1 , respectively. This study proposes a promising approach for sustainable utilization of lignin in energy storage applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Xu Fu,Ling-Ping Xiao,Bo-Wen Meng,Wen-Jie Li,Run-Cang Sun
Utilizing industrial lignin, which has the features of high yield and low added value, as a raw material for dye dispersants can produce significant environmental benefits and promote the sustainable development of resources. Ingeniously, we investigated the mechanochemical method to enhance effect in microwave-assisted sulfonation and the preparation of lignin-based dye dispersant using epichlorohydrin cross-linking. The results showed that lignin ball milling with Na 2 SO 3 could significantly increase the amount of C–O active structures and enhance its sulfonation reactivity. Under a lignin/Na 2 SO 3 ratio of 1:1, the charge density of the sulfonated lignin (milled lignosulfonate, MLS) achieved through microwave-assisted sulfomethylation up to 1.87 meq/g. Notably, the charge density of lignosulfonate (milled epichlorohydrin-cross-linked lignosulfonate, MELS) obtained by cross-linking with epichlorohydrin reached 1.91 meq/g with a degree of substitution of 1.45 mmol/g and molecular weight of 10530 g/mol. As compared with two commercial lignosulfonates and MLS, MELS displayed the greatest dispersion stability, increased the dyeing rate and K/S λmax value of dyed fiber while reducing staining. This work paved a new avenue for lignin valorization and provided new insights into the fabrication of lignin-derived dye dispersant.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhiqiang Qi,Hongzhen Cai,Xiangsheng Han,Zhihao Duan,Jingting Jin,Shunyi Zhang,Keyan Yang,Jiankang Zhang,Wenzhi Li
Constructing lignin-based nano-adsorbents with modulated surface polarity demonstrates promising efficiency, sustainability and biocompatibility in the application of Pb 2+ removal, nevertheless, which is hard to achieve. Here, a delicately designed assembly process of amphiphilic lignin was performed on the surfaces of aramid nanofibers (ANF), and a fibrous nano-hybrid (ANF@L x ) with uniform sheet-like lignin aggregations on ANF was obtained. Ascribing to the dominated π-π stacking between benzene rings on ANF and lignin, the H-bond between them weakened relatively, and more oxygen containing polar groups on lignin were exposed. Combining the advantages of fibrous morphology and active surfaces, the ANF@L x exhibited favorable processibility that can be molded into membranes and aerogels with different scales and shapes, and conducive adsorption capacity (∼587.8 mg/g), kinetic (achieve equilibrium within 1 min) and selectivity toward Pb 2+ in contaminated water resources. Thus, this work paved a green, simple and energy efficient way to modulate the assembly of lignin in micro-nano interfaces, and construct lignin-based nano-adsorbents with both of high Pb 2+ removal efficiency and promising industrial application potential.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Geng Lu,Lisha Zhang,Liang Liu,Yue Zhang,Siyuan Wen,Jing Luo,Xin Zhou,Jun Wang,Zhengliang Ma
Due to the skin's limited self-repair capacity after injury, developing effective wound dressings is crucial to accelerate wound closure and enhance tissue regeneration. In the work, a thermo-sensitive and tissue-adhesive hydrogel with an interpenetrating polymer network (QGNPI) was fabricated by using N-isopropylacrylamide (NIPAM), galactomannan, and chitin-lignin micelles. The abundant hydroxyl groups within galactomannan conferred enhanced adhesion properties to the hydrogel. To improve the stability of artesunate, it was encapsulated within the chitin-lignin micelles. Moreover, the QGNPI hydrogel exhibited excellent thermal responsiveness and strong tissue adhesion, enabling effective wound closure. It also demonstrated outstanding hemocompatibility and cytocompatibility, supporting its suitability for wound healing applications. In murine models, the QGNPI hydrogel functioned as an efficient sealant, achieving sutureless wound closure during initial healing. Moreover, it significantly accelerated tissue regeneration by reducing inflammatory cell infiltration, promoting organized collagen deposition, and stimulating robust angiogenesis. Collectively, these findings underscore the potential of QGNPI as a promising thermosensitive and adhesive hydrogel dressing for advanced wound management.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Enqing Zhu,Jinyuan Cheng,Leixin Huang,Hangyu Shen,Jiao Meng,Shaoning Wang,Zhengjun Shi,Muhammad Wajid Ullah,Jinxia Ma,Lili Zhang,Zhiguo Wang
The large-scale application of deep eutectic solvents (DESs) in biorefineries has been limited by low biomass loading. This study introduces a novel ZnCl 2 /lactic acid (LA) DES for the efficient isolation of lignin from poplar at ultrahigh solid loading. The results show that 67.41% delignification was achieved under extreme solid loading of 50 wt%. The recovered lignin exhibited unique amphiphilicity, enabling the fabrication of lignin nanospheres (∼123 nm in diameter) with uniform, monodisperse morphology, superior colloidal stability, and excellent Pickering emulsification stability. Reduced density gradient (RDG) analysis demonstrated that the ZnCl 2 /LA DES outperformed the conventional ChCl/LA system due to Zn 2+ coordination with the carboxyl group of LA and stronger noncovalent interactions with lignin, facilitating targeted β-O-4 bond cleavage. Over 95% of cellulose was recovered and processed into lignin-containing cellulose nanofibers, achieving an outstanding tensile strength of 139.17 MPa. The ZnCl 2 /LA DES system demonstrated exceptional recyclability, maintaining 84.41% delignification efficiency even after five consecutive reuse cycles at 33 wt% solid loading.
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Collagen and Leather
·
2023
·Vol. 5
·期 1
·1-13
·
IF 0
Chen Zehong,Lai Haihong,Zhuo Hao,Zhong Yu Lin,Zhong Linxin,Peng Xinwen
Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources, but producing biomass-based carbon electrode with high performances remains a challenge. Herein, we propose a facile self-assembly strategy to fabricate a biomass-derived N, S co-doping carbon electrode from lignosulfonate without any activation or template process. Taking advantage of the coordination between Fe ions and lignosulfonate, the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets, leading to a high specific surface area with rational pore structure, which are beneficial to the electron/ion transport and storage. The high contents of doping N (8.47 wt%) and S (2.56 wt%) significantly boost the electrochemical performances. As a supercapacitor electrode, the carbon material displays high specific capacitance of 390 F g −1 , excellent cycling stability and high energy density of 14.7 W h kg −1 at a power density of 450 W kg −1 . This study provides a potential strategy for synthesizing cost-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources, such as chitosan, collagen, and gelatin. Graphical
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ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yuanyuan Li,Dongjie Yang,Shuo Lu,Xueqing Qiu,Yong Qian,PengWei Li
TiO2 is widely used in cosmetic products but its poor dispersibility and photocatalytic degradation hazard still affect its performance. In this work, quaternized alkali lignin (QAL) is applied to encapsulate TiO2 by self-assembly and endows TiO2 with excellent sunscreen performance and safety. Results show that the nano TiO2 particles were well trapped in lignin colloidal spheres (LCS) via hydrogen bonding. The LCS encapsulated TiO2 (LCS@TiO2) had a water contact angle as high as 89° in comparison to only 22° in the TiO2 disk control sample. Thus, compatibility with the hydrophobic cream was improved. The photocatalytic activity of TiO2 could be effectively eliminated after modification. The dark color of QAL was significantly whitened by trapped TiO2. When the ratio (w/w) of LCS to TiO2 was 0.5, the LCS@TiO2 presented the best synergistic effect; the sun protection factor (SPF) value of the cream containing 25 wt % LCS@TiO2 reached 84.82.
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