INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Yuen Wai Lui,Qingqing Tao,Geoffrey R. Akien,Alexander K.L. Yuen,Alejandro Montoya,Bun Chan,Matthew Y. Lui
Hydrothermal depolymerization techniques such as hydrothermal liquefaction (HTL) are promising methods for converting biomass into fuel and valuable chemicals. While the HTL of lignin has been extensively studied, its fundamental chemistry remains underexplored, particularly regarding the reactivity differences among various major technical lignins under HTL conditions. A deeper understanding of these variations is essential for optimizing HTL processes. In this report, four major types of technical lignins—dioxane lignin, Kraft lignin, ethanosolv lignin, and soda lignin—extracted from the same pine sawdust were thoroughly characterized and subjected to neutral or base-catalyzed HTL at 330 °C for 1 h. The bio-oils derived from these lignins were analyzed for their physical and chemical properties. The data indicate that, while the structural differences between the lignins influenced the HTL outcomes, their impact was significantly smaller compared to the effect of the presence of a catalyst. To better understand the relationship between lignin structure and the resulting monomeric products, model compounds representing key structural motifs in technical lignins (namely β-O-4, styryl ether, and phenyl glycerol) were synthesized and tested under HTL conditions to simulate the lignin depolymerization process. Additionally, computational methods were employed to elucidate its reaction pathways.
研究领域:
能源植物学
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化学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Zhaojin Zhang,Subhan Mahmood,Ahmad Ali,Zhiyi Ye,Shun Yao
For the first time, the valorization of waste shells from the Siraitia grosvenorii industry involves their conversion into carbon dots (CDs) for the detection of deep eutectic solvents (DESs) concentrations through their fluorescence effect. The material composition of the fruit shells was first analyzed, revealing that lignin constitutes 29.8 % of their total mass. Then four types of DESs were prepared for the extraction of lignin from these shells; among them, choline chloride-lactic acid (ChCl-Lac) achieving the highest extraction rate of 92.49 %. The obtained lignin was characterized and subsequently used as a raw material to synthesize carbon dots possessing tunable fluorescent properties with a quantum yield of 5.73 %. Moreover, it was found that Fe 3 + could quench the fluorescence of the CDs, while the addition of certain DESs could restore the quenched fluorescence. The presence of DESs alone could also induce changes in fluorescence when interacting with the CDs. Based on this effect, a new system for the effective quantitation of the concentration of DESs in aqueous solutions using CDs was established, and DESs were used in several main steps and played multiple roles. This study provides not only a solution for the value-added utilization of solid waste from current fruit industry, but also a new approach for the concentration detection of DESs in aqueous solutions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Dengkang Guo,Wenting Ren,Sisi Yao,Jingpeng Li,Yan Yu,Fuxiang Chu
Reckoning with the global environmental challenge of plastic pollution, particularly in terms of recycling and biodegradation of thermosetting plastics, sustainable alternatives are imperative. The rapidly growing and eco-friendly material bamboo has great potential as a sustainable resource; however, it lacks the inherent self-bonding and plasticity characteristics found in plastics. This study presents a feasible approach to enhance the plasticity of bamboo by selectively removing part of its lignin and disrupting the crystalline structure of cellulose. Concurrently, this process selectively transforms hydroxyl groups into highly reactive dialdehyde groups to increase the reactivity of bamboo. The resulting activated bamboo units undergo a hot-pressing process to transform them into a type of thermosetting plastic (ABTP). The ABTP is highly moldable, and its color can be precisely regulated by adjusting the lignin content. Additionally, it exhibits exceptional solvent and water resistance, along with notable mechanical properties, including a tensile strength of 50 MPa, flexural strength of 80 MPa, flexural modulus of 5 GPa, and Shore D hardness approaching 90. Furthermore, the bamboo-derived plastic exhibits exceptional reusability and biodegradability, presenting feasible and environmentally friendly alternatives to conventional plastics while harnessing the sustainable development potential of bamboo.
研究领域:
材料科学
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环境科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Yi Meng,Tanglong Liu,Shanshan Yu,Yi Cheng,Jie Lu,Xianzheng Yuan,Haisong Wang
A recyclable and high-efficiency nanoscale adsorbent is prepared from sustainable resources in this study. Inspired by the amino acid and phenolic hydroxyl group in reed root acting as active sites for adsorption, a chemically modified method is employed, where lignin is improved with glycine to prepare a biomimic adsorbent with a synergistic effect of amino acid and phenolic hydroxyl. By blending with nano-Fe3O4, the modified lignin is applied to synthesize lignin derivate magnetic nanogels that adsorb inorganic ions and organic dyes. The maximum capacities of the adsorption are highly improved, whereas unmodified lignin-based adsorbents reveal a low adsorption capacity under the same conditions. The used nanogels are recycled by magnetic separation and regenerated in hydrochloric acid, and the tests are repeated three times. All the regeneration ratios are over 90%, thus ensuring reusability. Finally, the as-prepared nanogels are applied to treat pulp bleaching effluents, revealing one potential application in industry. The designing concept of the recyclable nanogel in this study provides a biomimic strategy of using sustainable resources to treat contamination.
研究领域:
环境科学
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材料科学
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生物化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
·
IF 5.162
Chanchal Kumar Kundu,Zhiwei Li,Xiaohong Li,Zhijun Zhang,Yuan Hu
A plant derived bio-macromolecule namely lignin (L) and a green phosphorus compound like phytic acid (PA) were functionalized with graphene oxide (GO) and subsequently, used to enhance the flame retardant properties of polyamide 66 (PA66) fabrics in a one pot deposition method. Meanwhile, we also considered pure phytic acid and one more bio-derived charring agent like chitosan (CS) to formulate a series of GO-based flame retardant finishing by altering the applied compounds in the formulation. The applied finishing with a minimum loading % (i.e., less than 10%) rarely altered the physical properties (i.e., color, handle and tensile strength , etc.) of treated textiles while provided enhanced thermal stability and added flame retardancy. Thus, a significant increase in limiting oxygen index (LOI) by 27% was received for the GO-lignin and GO-phytic acid modified fabric sample (i.e., PA66-A), indicating the supremacy of graphene-based compound. Furthermore, a substantial reduction in the peak heat release rate (pHRR) by 25% was also noticed for the fabric sample treated with GO-lignin, chitosan and phytic acid (i.e., PA66-D). Additionally, the as prepared finishing exhibited a considerable level of wash durability as a maximum reduction of pHRR by 17% was retained even after 5 washing cycles.
研究领域:
材料科学
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纺织工程
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生物化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2017
·Vol. 7
·期 71
·45034-45044
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IF 3.108
Yajun Deng,Weibin Bai,Jipeng Chen,Xinmei Zhang,Shenji Wang,Jinhuo Lin,Yanlian Xu
Protective corrosion coatings are preferably composed of available, environmentally friendly, and low-volatility organic compounds. Herein, new excellent corrosion graphene/raw lacquer composite coatings were formed, in which waterborne graphene was modified by taking lignin tripolymer (LT) as an aqueous stabilizer and subsequently adding to raw lacquer (RL). Graphene/lacquer composite coatings were achieved by an eco-friendly fabrication process. The structure and thermostability of the lignin derivative were studied by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry (TG), respectively, while the composition of the LT was characterized by Raman spectrometry. And the experimental result revealed that LT was an effective graphene dispersant (LTG) up to 60 d without any precipitation. Besides, the SEM of the graphene/lacquer coatings revealed that the excellent protection properties were highly attributable to the formation of a very rough surface, because of the highly dispersed nature of the graphene nanoparticles. Also, the corrosion behavior of the composite coatings on a metal substrate were studied by polarization curve analysis and electrochemical impedance spectroscopy (EIS). According to the electrochemical corrosion tests, the lacquer composite coating with 5 wt% LTG dispersion (RL/LTG-5, containing 0.3 wt% graphene) possessed excellent corrosion resistance, making it suitable for protecting bare metal substrates.
研究领域:
材料科学
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电化学
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环境保护
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Jing Yu,Weizhi Lin,Hao Cheng,Qin Zhang,Feng Chen
Graphene films have been considered excellent candidates for thermal management and electromagnetic interference (EMI) shielding materials due to their outstanding flexibility, exceptional thermal conductivity, and electrical conductivity. In this study, lignin, a biomass carbon precursor, was added as a welding agent to graphene oxide (GO), and the graphene composite films with enhanced performance were obtained through multi-step high-temperature annealing. Lignin assisted the assembly of GO through hydrogen bonds and covalent bonds, resulting in more compact and ordered precursor films. During the annealing process, lignin played a welding role by synergistically crystallizing with GO, which not only repaired the defects in the graphene sheets but also connected adjacent graphene sheets to form larger sheets. As a result, the graphene composite film achieved a 30.3% improvement in thermal conductivity (1462 W m −1 K −1 ), a 50.0% increase in electrical conductivity (1.49 × 10 6 S m −1 ), and an excellent EMI shielding effectiveness of up to 70.3 dB. Moreover, the composite film exhibited excellent flexibility, with almost no decrease in electrical conductivity after 100,000 folding cycles. This dual-functional graphene film offers a new solution to the heat dissipation challenges and electromagnetic pollution issues posed by the integrated development of electronics, with potential applications in advanced devices, portable equipment, and aerospace fields.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
ACS Applied Nano Materials
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2024
·
IF 5.3
Jun Xiu Chen,Agul Bao,Dalai Siqin
In this study, we prepared N/S-codoped porous carbon materials via a one-step doping method using lignin as the carbon source, thiourea as the N and S source, and KOH as the activator. The synthesized material exhibited a rich N content and a certain S content. The important reason the CO2 adsorption characteristic of the carbon materials were investigated by modulating the thiourea proportion and doping temperature. Results indicate that at a thiourea ratio of 1:4 and a doping temperature of 700 °C, the material exhibited an outstanding CO2 adsorption capacity of 3.49 mmol/g. Various characterizations revealed that such a high adsorption capacity is attributed to the combination of a microporous structure and excellent surface chemical properties. The doping of S atoms resulted in the formation of effective active sites, increased the defect density of the material, and promoted the generation of N functional groups, thereby enhancing the efficiency of CO2 adsorption. In addition, the material exhibits high CO2/N2 selectivity and cycling stability. The overall results indicate that lignin-derived N/S-codoped porous carbon can serve as a potential adsorbent for CO2 capture.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CELLULOSE
·
2024
·
IF 4.9
Gan Peng,Zhang Kai,Li Jinze,Xu Qixi,Yang Guihua,Zhang Yunlai,Dong Xinchuang,Wang Baobin,Zhang Lei,Chen Jiachuan
This study focuses on using agricultural straw—specifically sugarcane bagasse—as the raw material and employs single-factor optimization and response surface modeling strategies to develop a low-temperature NACO pulping process. A mathematical prediction model was constructed to explore the leaching patterns of chemical components in sugarcane bagasse, reveal the reaction mechanism of selective lignin removal through the new oxygen-alkali synergistic approach, and elucidate the green pulping mechanism of the low-temperature NACO method. The research findings indicate that at a temperature as low as 114.3 °C and a Na 2 CO 3 / NaOH mass ratio of 1.86, the paper pulp exhibits optimal performance, with a freeness yield of 52.83%, a viscosity of 675.77 ml/g, a whiteness of 40.95% ISO, and a kappa number of 19.85. At this condition, only 43.96% of the silicon element enters the black liquor. Response surface variance analysis shows that the studied variables have statistically significant effects on different response levels, with all correlation coefficients (R 2 ) greater than 0.93, indicating that the model has good predictive capability for the low-temperature NACO pulping process. Finally, the paper produced from the pulp under the optimal conditions exhibits excellent physical properties, with a tear index of 4.9 kPa·m 2 ·g⁻ 1 , burst index of 3.8 mN·m 2 ·g⁻ 1 , tensile index of 70.9 N·m·g⁻ 1 , and ring crush index of 11.6 N·m·g⁻ 1 , which are 1.9, 1.8, 1.6, and 2.3 times, respectively, compared to the performance of paper made by traditional oxygen-alkali chemical pulping methods.
研究领域:
制浆与造纸工程
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化学工程
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环境科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Yajun Deng,Jipeng Chen,Xinmei Zhang,Fangfang Wei,Jinxin Zhang,Jinhuo Lin,Yanlian Xu
Corrosion resistant coatings based on eco-friendly and low-volatile organic compounds have received attention in recent years. In this work, the water-dispersible corrosion inhibitors were prepared from lignin, aniline, and 4-fluoroaniline. We achieved different polymer inhibitors with excellent optimum synergistic effects, and the resulting was shown that the excellent dispersion of inhibitors in deionized water were stable for 3 h, compared to polyaniline (PANI) after 10 min of storage. Then, those inhibitors subsequently composited into the natural lacquer to generate anti-corrosion coatings. As revealed by electrochemical measurements, including Tafel polarization curves and electrochemical impedance spectroscopy (EIS), the composite coatings were exhibited outstanding chemical properties in different corrosive medium. The resulting showed that the corrosion performance of composite lacquer coatings were remarkably improved compared with pure lacquer coating, especially L/PF-73-10 coating.
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Yi Wei,Jitong Tang,Jiale Xie,Chaoyue Shen
Molten alkali carbonates (MC) pyrolysis technology is proposed to dispose digestate waste and convert it into high value-added phenolics in this work. The results showed that temperature strongly affected phenolic production by promoting the depolymerization of lignin, while particle size had less influence on phenolic productions owing to the catalysis and dynamic diffusion of alkali metal ions. Meanwhile, the effect of mass ratio between sample and molten carbonates was investigated by a series of differentiated proportions from 5 to 25%. The optimum reaction conditions were 10% of mass ratio in a particle size from 0.6 to 0.85 mm at 450 °C, with the maximum phenolics yield of 67.08% in organic. In sum, 5.6 g of phenolics and 0.96 g of guaiacols were generated from 100 g of digestate. Compared with conventional pyrolysis method, the methoxyl group in liquid product could be efficiently removed at atmosphere in molten carbonates. Additionally, thermogravimetric analysis further demonstrated that alkali metal ions (Li + , Na + and K + ) promoted the primary degradation of lignin and secondary monomolecular dissociation reactions of methoxyphenol.
研究领域:
生物化学工程
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环境科学
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产品关联
DOI
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-7
·
IF 3.998
Zou Weihua,Wang Zhangheng,Sun Delin,Ji Xiaoqin,Zhang Pingfang,Zhu Zhihong
Our transparent cellulose nanofibrils composites (TCNC) directly from rotary-cutting poplar veneer (RPV) whose lignin can be easily stripped by our treatment. This TCNC is prepared by stripping lignin of original RPV and infiltrating epoxy resin (ER) into delignified RPV. This TCNC with two-layer delignified RPVs whose grains perpendicular (0/90°) to each other, which were solidified on solar cell while infiltrating ER. This TCNC with high transmittance (~90%), high haze (~90%), and equal refractive index fluctuation. Comparing with epoxy resin (ER), this TCNC can enhance open circuit voltage (VOC) from 1.16 to ~1.36 and short circuit density (JSC) from 30 to ~34 for the solar cell, and can enhance test fore from 0.155 kN to ~0.185 kN and displacement from 43.6 mm to ~52.5 mm.
研究领域:
材料科学
·
可再生能源
·
林业工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）