CELLULOSE
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2026
·
IF 4.6
Li Liping,Lu Yulan,Cao Shuqi,Qin Meng,He Liufang,Liao Junqi,Wang Zhinan
Lignin-containing cellulose nanofibrils (LCNFs) have attracted significant attention for their enhanced hydrophobicity and thermal stability. However, producing LCNFs with tunable properties for diverse applications through a sustainable process that does not require delignification remains a challenge. Herein, LCNFs with adjustable properties were successfully fabricated from wood sawdust using a maleic acid (MA)/citric acid (CA) treatment followed by high-pressure homogenization. MA and CA showed synergistic effect in the treatment process: MA removed part of the lignin and hemicellulose, which exposed more hydroxy groups on the cellulose fibrils, thereby facilitating the esterification reaction of CA to introduce more carboxyl groups on the fibrils. By varying the mass ratio of MA to CA, LCNFs with lignin content ranging from 4.23 ± 0.1% to 19.98 ± 0.39%, mean diameters from 2.4 to 5.4 nm and aspect ratio from 200 to 350 were prepared. Recycling experiments confirmed the reusability of mixed acid, with LCNF properties remaining consistent over three cycles. The LCNF-based aerogel prepared via directional freezing showed ultra-low density, good mechanical properties and superior thermal insulation. This study developed a novel and sustainable approach for fabricating LCNFs from wood sawdust, presenting a promising green nanomaterial with significant potential for diverse practical applications. Graphical abstract
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 2
·1479
·
IF 5.6
Shuxian Weng,Guixin Zhang,Yun Hu,Caiying Bo,Fei Song,Guodong Feng,Lihong Hu,Yonghong Zhou,Puyou Jia
Lignin degradation is an effective means of achieving the high-value application of lignin, but degradation usually requires the use of high temperatures and harsh reaction-conditions. This study describes a green, mild approach for the degradation of lignin, in which chlorine dioxide (ClO2) was used for the oxidative degradation of lignin (IL) in an acidic aqueous suspension at room temperature. The optimal process conditions were: 30 mL of ClO2solution (2.5 mg·L−1), pH 4.5 and 3 h. The FT-IR, NMR (1H NMR, 2D-HSQC and31P NMR), XPS and GPC analyses indicated that lignin could be degraded by ClO2relatively well at room temperature, to form quinones and muconic acids. Additionally, DIL was reduced to substances with a high phenolic-hydroxyl (OH) content (RDIL) under the presence of NaBH4, which further confirmed the composition of DIL and which can be applied to the development of lignin-based phenolic resins, providing a reference for the further modification as well as the utilization of DIL.Keywords:chlorine dioxide;lignin;room temperature;degradation
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Journal of Cleaner Production
·
2023
·
IF 11.1
Lijun Guo,Liangqiong Peng,Jiheng Li,Wenhua Zhang,Bi Shi
U(VI) recovery from high-salinity nuclear wastewater remains a diffcult challenge. Accordingly, amine-functionalized lignin microspheres (AL-PEI/GMS) with high porosity, abundant functional groups, and appropriate surface area, were synthesized via a green and simple process, and used as an adsorbent for U(VI) recovery. Results illustrated that AL-PEI/GMS showed outstanding adsorption capacity for U(VI) of 250 mg/g and high selectivity of SF U(VI) > 15, 000 over a wide pH range from one to nine, preeminent regeneration performance with adsorption efficiency > 95% after 50 cycles, and desorption performance (desorption efficiency > 60% after 50 cycles). The high applicability of AL-PEI/GMS was further proven by its high U(VI) removal efficiency under various high-salinity conditions (U(VI) removal rate > 99%). Furthermore, 2553 bed volumes (BV) of the U(VI) feeding streams can be effectively treated by AL-PEI/GMS via a fixed-bed column system with an extremely high flow rate (20 mL/min), and more than 95.6% of U(VI) can be rapidly desorbed by using 12 BV of eluent solution. Furthermore, the comparatively low operational costs and overall economic feasibility further suggested the great potential of AL-PEI/GMS for U(VI) on the industrial scale. The mechanism of U(VI) adsorption on AL-PEI/GMS was further found to be chemisorption-related. This work presents an applicable approach by using amine-functionalized lignin microspheres to achieve highly ultrafast U(VI) adsorption and desorption under a high-salinity condition via a fixed-bed column system, which not only provides a feasible method to purify U-contaminated nuclear wastewater, but also successfully realizes the recycling of U(VI) from nuclear wastewater, thus resolving the increasingly serious energy crisis and protecting environment in the nuclear industry.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jiajun Li,Junyu Yang,Peiru Wang,Ziyang Cong,Feiyan Shi,Li Wei,Kai Wang,Yao Tong
Metal sulfides with the nature of low electronegativity and high electrochemical activity are potentially considered effective electrode materials for supercapacitors. Meanwhile, hierarchical porous carbon (HPC) materials derived from eco-friendly enzymatic hydrolysis lignin are the ideal matrix for holding nanoparticles (NP) that allows the overall NP/HPC composite to achieve outstanding electrochemical performance. In this study, NiCo 2 S 4 nanoparticles were in-situ synthesized on the inner surface of 3D HPC that derived from enzymatic hydrolysis lignin with a simple one-step solvothermal method, thus forming a high-performance composite electrode material for supercapacitor applications. As a result, the NiCo 2 S 4 /HPC composite yields an outstanding specific capacity of 1264.2 F g −1 at 1 A g −1 and also exhibits remarkable rate performance. Such remarkable property is attributed to the effective combination of NiCo 2 S 4 plus HPC and their strong chemical bonds, which enable excellent electronic conductivity and abundant exposed electroactive sites. The asymmetric supercapacitor assembled by utilizing NiCo 2 S 4 /HPC and active carbon as the positive and negative electrodes, respectively, provide an excellent energy density of 32.05 Wh kg −1 at a power density of 193.9 W kg −1 . This work puts forward a practical optimization strategy for metal sulfides used in electrochemical energy storage devices.
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Materials Advances
·
2022
·Vol. 4
·期 2
·586-595
·
IF 0
Fan Wang,Xiaozhen Ma,Jialong Wu,Yeyan Chao,Peng Xiao,Jin Zhu,Jing Chen
Flexible sensors are of great significance in wearable electronic devices. Herein, this work solves the problems of unfriendly and high cost materials and not easy to recycle conductive parts. Multi-functional conductive polyurethane (PU) foam has been constructed based on lignin, PU, and MWCNTs. Lignin is widely available and environmentally friendly, which endows polyurethane foam with degradable properties. The sensor exhibited excellent resistance change performance in the ultra-wide compression range from 0 to 90%. After 2000 cycles of compression test, the resistance change curve was still stable, and then the resistance returned to the initial value. The detection pressure was as high as 275.95 kPa. This sensor can detect a minimum deformation of 0.23%. The gauge factor value is as high as 2.75 in the strain range of 30% to 60% of compression deformation. It does not change shape under 90% cyclic compression strain, and does not change micro surface morphology after washing in distilled water for 12 hours. The sensor can not only detect large-scale movements of human limbs and joints but also detect weak physiological activities such as mouth opening, swallowing, breathing, and pulse. At the same time, it has good repeatability and reproducibility for throat vibration caused by human pronunciation and for some non-contact movements (such as blowing and vibration). Finally, because MWCNTs@LPUF is degradable in an alkaline environment, MWCNTs can also be recycled and used. MWCNTs@LPUF sensors are environmentally friendly, recyclable, sensitive and have excellent environmental stability, enabling them to have great potential for future application in the fields of flexible wearable electronics and healthcare.
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Journal of Fungi
·
2023
·Vol. 9
·期 2
·237
·
IF 4.7
Feifei Wu,Heqin Wang,Qiufeng Chen,Xiao Pang,Hao Jing,Lijun Yin,Xiuqing Zhang
It has been demonstrated that lignin was efficiently degraded byLentinula edodes(L. edodes). However, the process of lignin degradation and utilization byL. edodeshas not been discussed in detail. Therefore, the effects of lignin onL. edodesmycelium growth, chemical compositions, and phenolic profiles were investigated herein. It has been revealed that 0.10% lignin acted as the most effective concentration to accelerate mycelia growth, which yielded the highest biomass of 5.32 ± 0.07 g/L. Furthermore, a 0.10% concentration of lignin promoted the accumulation of phenolic compounds, especially protocatechuic acid, with peak value of 48.5 ± 1.2 μg/g. In contrast, the higher concentration of lignin (0.20%) exerted an inhibitory effect on the growth ofL. edodes. Overall, the application of lignin at the optimal concentration of 0.10% could not only enhance the mycelial growth but also accumulate the phenolic acids and raise the nutritional and medical values ofL. edodes.Keywords:lignin;shiitake mushroom;biomass;phenolic compound
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Dingliang Dai,Jianhao Qiu,Guanglu Xia,Lu Zhang,Hong Ma,Luan Yang,Jianfeng Yao
Flower-like BiOI was decorated by CdS nanodots and followed by the introduction of iodine vacancies (V I ) for photocatalytic sodium lignosulfonate (SLS) valorization under visible light. The iodine vacancies could adjust the band configuration, strengthen the light absorption and act as electron traps, while the intimate contact between BiOI and CdS nanodots provides a high-speed channel for charge transfer. As a consequence, the photocatalytic performance of SLS conversion into value-added vanillin was greatly improved over CdS/BiOI-V I compared with those of CdS, BiOI and CdS/BiOI. The highest yield of vanillin is 10.95 mg/g SLS over CdS/BiOI-V I , about 5, 8.7, 1.3 times those of CdS, BiOI, CdS/BiOI, respectively, and exceeding most related photocatalysts reported elsewhere. More significantly, as to the lignin from Masson pine and alkali lignin, the corresponding vanillin yield can reach 7.04 and 6.54 mg/g lignin , respectively, under the same condition, which suggests the great potential and universality for photocatalytic lignin valorization over such CdS/BiOI-V I heterostructure.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qianqian Tang,Qing Chen,Mingsong Zhou,Dongjie Yang
The molecular simulation software was firstly applied to analyze the adsorption of sulfomethylated lignin (SAL) on dye surfaces. Then, SALs with different sulfonic group contents were prepared and characterized by FTIR, NMR, EA and GPC measurements using alkali lignin (AL) as raw materials and sodium sulfite as sulfonating agents. Next, SAL 1.53 was determined to the optimum dispersant by TSI, particle size and thermal storage stability measurements, which had the smallest particle size of 173 nm and highest stability, comparable to the commercial Reax 85A lignin dispersant and basically satisfying the requirement of nano disperse dyes used in the digital printing technology. QCM, AFM and zeta potential results indicated that as the sulfonic group content of SAL increased, the adsorption mass, rigidity of the adsorbed layer, adsorption force and absolute zeta potential value all showed a gradually increasing tendency due to an enhanced hydrophilicity, and thus a decreased intermolecular agglomeration and an increased molecular chain stretching degree. A maximum was observed for SAL 1.53 . This research not only provided a novel approach to the preparation of high-performance lignin dispersants for nano disperse dyes, but also would broaden the high value-added industrial applications of biomass lignin into the digital printing and dyeing field.
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GREEN CHEMISTRY
·
2022
·Vol. 24
·期 24
·9659-9667
·
IF 11.034
Weiqiong Zhang,Binbo Wang,Xiwei Xu,Hongzhi Feng,Kezhen Hu,Yi Su,Sican Zhou,Jin Zhu,Gengsheng Weng,Songqi Ma
As the most abundant natural aromatic polymer on the Earth, lignin is expected to replace fossil resources for the preparation of high-performance thermosetting polymers. Numerous studies have been devoted to utilizing lignin through depolymerization and chemical modification; nevertheless, the green and facile valorization of lignin to high value products is still a challenge. Herein, we developed a straightforward approach to directly use lignin to prepare thermosetting polymers combining high performance and excellent degradability. In a green acetone–water–acetic acid component solvent system, lignin-based thermosets were facilely prepared via cross-linking reactions between lignin and glycidoxypropyltrimethoxysilane (KH560). The thermosets exhibited outstanding thermal and mechanical properties with a glass transition temperature of ∼214 °C, a tensile strength of ∼45 MPa and a Young's modulus of ∼2274 MPa, and these properties can be easily manipulated by adjusting the ratio of lignin to KH560. The presence of Si–O–C bonds and ester bonds in the network structure imparts excellent degradability to the thermosets in alkaline aqueous solution. This work provides a green and facile strategy to directly integrate lignin into cross-linked networks, which discloses a new idea for the valorization of lignin to value-added materials.
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CELLULOSE
·
2022
·Vol. 30
·期 1
·141-152
·
IF 6.123
Chang Longjun,Sun Yong,Gan Linhuo
To clarify the formation of pseudo-lignin during pretreatment is vital to high-value utilization of lignocellulose. In this study, hydrothermally treated bamboo and α -cellulose were employed to investigate the generation of pseudo-lignin during deep eutectic solvent (DES) treatment. It is found that pseudo-lignin not only contains some characteristic substructures of natural lignin, but also has the structural characteristics of phenol-type oxygenated and furan-type compounds. It is proposed that chloride anion probably stimulates the deconstruction of crystalline cellulose to form pseudo-lignin. Besides, it’s suggested that the change in lignin content can be reflected from the viewpoint of acid-soluble lignin to minimize the interference from pseudo-lignin, and there may exist a competition between 5-chloromethylfurfural production and pseudo-lignin formation. This study provides a feasible route to produce pseudo-lignin from α -cellulose via DES and contributes to a better understanding of pseudo-lignin formation.
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RENEWABLE ENERGY
·
2022
·
IF 8.634
Wei Lv,Xiaohong Hu,Yuting Zhu,Ying Xu,Shijun Liu,Peili Chen,Chenguang Wang,Longlong Ma
Herein, the catalysts of ruthenium and molybdenum oxide nanoparticles supported on activated carbon (AC) were synthesized by precursor stepwise impregnation and employed for the hydrodeoxygenation (HDO) of lignin oil. The XRD, TEM, XPS and NH 3 -TPD-MS result of RuMoO x /AC catalysts confirm that the method of loading molybdenum precursor before ruthenium precursor is advantageous for the MoO x and Ru nanoparticles high dispersion and the reduction of MoO x species enhance the amount of acidity of catalyst. Meanwhile, the reduction temperature of RuMoO x /AC-1-T catalysts could effectively regulate the MoO x species that determine the activity and product distribution of HDO. The conversion of aromatic monomers/dimers were up to 96% with high selectivity of hydrocarbon over RuMoO x /AC-1-350 catalyst at 160 °C and 30 bar H 2 . Which is attributed to the MoO 3 and Ru species possess the excellent activity of benzene ring deep hydrogenation, ether bond breaking and acid dehydration. The RuMoO x /AC-1-350 catalyst effectively converted lignin oil (from the depolymerization of cornstalk hydrolysis residue) into hydrocarbons (56.9 wt%) and cyclohexanol/ethers (18.7 wt%) under 280 °C and 3 bar H 2 . The durability of the RuMoO x /AC-1-350 catalyst for HDO of lignin oil was also investigated and showed that the RuMoO x /AC-1-350 catalyst had good stability, regenerability and repeatability.
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BIOMACROMOLECULES
·
2022
·
IF 6.978
Ajoy Kanti Mondal,Dezhong Xu,Shuai Wu,Qiuxia Zou,Fang Huang,Yonghao Ni
Preparation of natural polymer-based highly conductive hydrogels with tunable mechanical properties for applications in flexible electronics is still challenging. Herein, we report a facile method to prepare lignin-based Fe3+-rich, high-conductivity hydrogels via the following two-step process: (1) lignin hydrogels are prepared by cross-linking sulfonated lignin with poly(ethylene glycol) diglycidyl ether (PEGDGE) and (2) Fe3+ ions are impregnated into the lignin hydrogel by simply soaking in FeCl3. Benefiting from Fe3+ ion complexation with catechol groups and other functional groups in lignin, the resultant hydrogels exhibit unique properties, such as high conductivity (as high as 6.69 S·m–1) and excellent mechanical and hydrophobic properties. As a strain sensor, the as-prepared lignin hydrogel shows high sensitivity when detecting various human motions. With the flow of moist air, the Fe3+-rich lignin hydrogel generates an output voltage of 162.8 mV. The assembled supercapacitor of the hydrogel electrolyte demonstrates a high specific capacitance of 301.8 F·g–1, with a maximum energy density of 26.73 Wh·kg–1, a power density of 2.38 kW·kg–1, and a capacitance retention of 94.1% after 10 000 consecutive charge–discharge cycles. These results support the conclusion that lignin-based Fe3+-rich, high-conductivity hydrogels have promising applications in different fields, including sensors and supercapacitors, rendering a new platform for the value-added utilization of lignin.
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