期刊：
International Journal of Biological Macromolecules,2023年238:124127 ISSN：0141-8130
通讯作者：
Weihua Luo
作者机构：
[Luo, Weihua; Guo, Bosen; Yu, Peng; Wang, Wenda; Shao, Lishu; Peng, Yuting; Wu, Zhiping] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Shao, Lishu; Wu, Zhiping] Cent South Univ Forestry & Technol, Bioethanol Res Ctr State Forestry Bur, Changsha 410004, Peoples R China.;[Luo, Weihua; Shao, Lishu] Cent South Univ Forestry & Technol, Hunan Engn Res Ctr Woody Biomass Convers, Changsha 410004, Peoples R China.;[Luo, Weihua] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
通讯机构：
[Weihua Luo] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Hunan Engineering Research Center of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Hunan Province Key laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
摘要：
In this study, the lignin was pre-modified using small-molecule nitrogen-containing compounds, and then the nitrogen-doped lignin-based carbon nanotubes (L-NCNTs) were fabricated by pyrolysis using the modified lignin as raw materials. The obtained L-NCNTs were multi-walled carbon nanotubes with diameters between 10 and 80 nm. The modification of lignin had an important effect on the nitrogen morphology of L-NCNTs, and promoted the high selectivity of pyridine-N in the L-NCNTs. Defects and pyridinic-N structure were conducive to boosting photothermal properties of the L-NCNTs. The photothermal conversion efficiency of the L-NCNTs after 808 nm laser irradiation for 5 min reached 58.8 %. The L-NCNTs can be used as photothermal agents in drug delivery system to achieve mild photothermal therapy, and it is basically non-toxic to normal cells, indicating good biocompatibility. This work provides new ideas for development of lignin-based high value-added products from biomass.
作者机构：
School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023 China;State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555, Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203 China;Shandong Laboratory of Yantai Drug Discovery, Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264117 China;Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237 China;[Lin-Fu Liang; Lin-Fu Liang Lin-Fu Liang Lin-Fu Liang] College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, 410004 China
通讯机构：
[Lin-Fu Liang; Lin-Fu Liang Lin-Fu Liang Lin-Fu Liang] C;[Yue-Wei Guo; Yue-Wei Guo Yue-Wei Guo Yue-Wei Guo] S;School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, 210023 China<&wdkj&>State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555, Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203 China<&wdkj&>Shandong Laboratory of Yantai Drug Discovery, Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264117 China<&wdkj&>Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237 China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, 410004 China
作者机构：
[Guo, Yue-Wei; Chen, Zi-Hui; Yang, Min; Yao, Li-Gong] Chinese Acad Sci, Shanghai Inst Mat Med, State Key Lab Drug Res, 555 Zu Chong Zhi Rd, Zhangjiang Hi Tech Pk, Shanghai 201203, Peoples R China.;[Ge, Zeng-Yue; Liang, Lin-Fu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, 498 South Shaoshan Rd, Changsha 410004, Peoples R China.;[Guo, Yue-Wei] Bohai Rim Adv Res Inst Drug Discovery, Shandong Lab Yantai Drug Discovery, Yantai 264117, Peoples R China.;[Guo, Yue-Wei] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Druggabil Res Marine Nat Prod, 1 Wenhai Rd, Jimo 266237, Qingdao, Peoples R China.
通讯机构：
[Lin-Fu Liang; Lin-Fu Liang Lin-Fu Liang Lin-Fu Liang] C;[Yue-Wei Guo; Yue-Wei Guo Yue-Wei Guo Yue-Wei Guo] S;State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203 China<&wdkj&>Shandong Laboratory of Yantai Drug Discovery, Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264117 China<&wdkj&>Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237 China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, 410004 China
作者机构：
[Cao, Jian-Guo; Yang, Fan; Song, Yu-Ting] Shanghai Normal Univ, Coll Life Sci, Biol Dept, 100 Guilin Rd, Shanghai 200234, Peoples R China.;[Guo, Yue-Wei; Song, Yu-Ting; Yao, Li-Gong] Chinese Acad Sci, Shanghai Inst Mat Med, State Key Lab Drug Res, 555 Zu Chong Zhi Rd,Zhangjiang Hitech Pk, Shanghai 201203, Peoples R China.;[Liang, Lin-Fu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, 498 South Shaoshan Rd, Changsha 410004, Peoples R China.;[Zhi Su, Ming; Guo, Yue-Wei; Yu, Dan-Dan] Bohai Rim Adv Res Inst Drug Discovery, Shandong Lab Yantai Drug Discovery, Yantai 264117, Peoples R China.;[Guo, Yue-Wei] Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Druggabil Res Marine Nat Prod, 1 Wenhai Rd,Aoshanwei, Qingdao 266237, Peoples R China.
通讯机构：
[Lin-Fu Liang; Lin-Fu Liang Lin-Fu Liang Lin-Fu Liang] C;[Yue-Wei Guo; Yue-Wei Guo Yue-Wei Guo Yue-Wei Guo] S;[Fan Yang; Fan Yang Fan Yang Fan Yang] B;State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203 China<&wdkj&>Shandong Laboratory of Yantai Drug Discovery, Bohai rim Advanced Research Institute for Drug Discovery, Yantai, 264117 China<&wdkj&>Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao 266237 China<&wdkj&>Biology Department, College of Life Science, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234 China<&wdkj&>State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203 China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha, 410004 China
摘要：
Alkali treatment of bamboo scraps was adopted to improve the interface compatibility between the organic-phase bamboo scraps of the composite material and the inorganic-phase magnesium oxychloride. Scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and other techniques were used to characterize bamboo scraps before and after alkali treatment. The bamboo scraps treated with alkali exhibited improved bonding properties to cementitious materials. The mechanical properties and water resistance of the composite material were evaluated. The results indicated that the mechanical strength first increased and then decreased with an increase in alkali concentration. After treatment with 3wt% NaOH solution, the composite exhibited the highest compressive strength and bending strength. The softening coefficient also reached 0.57. Alkali treatment resulted in improved bonding of bamboo scraps with magnesium oxychloride cementitious material, as confirmed by mechanical property and water resistance tests, and SEM image analysis.
摘要：
Geopolymer is a new alternative cement binder to produce concrete. In the present study, a novel geopolymer composites containing bamboo shaving (0-2 wt.%) were fabricated and exposed to the temperatures of 200 degrees C, 400 degrees C, 600 degrees C and 800 degrees C. Physical properties, micro-structure, and mechanical strengths of the geopolymer composites were evaluated before and after heating in order to understand their thermal properties, which are essential for the use as building materials. As the temperature rises, the drying shrinkage and apparent porosity of the composites increase, while the compressive and bending strengths decrease. At the temperature range of 200 degrees C-800 degrees C, the residual compressive strength rates of the geopolymer composite containning 2 wt.% bamboo shaving were respective 73.8%, 61.47%, 56.16%, and 29.56%, meanwhile, the residual flexural strength rates were respective 46.69%, 8.68%, 2.52%, and 2.33%. Correspondingly, the residual compressive strength rates of pure geopolymer were respective 72.81%, 61.99%, 54.55%, and 14.64%; the residual flexural strength rates were 48.87%, 5.69%, 3.22%, and 2.47%, respectively. Scanning electron microscope (SEM), optical microscope, and X-ray diffractometry (XRD) were applied to find the microscopic changes. The strength loss in the geopolymer composites was mainly because of the thermal degradation of bamboo shaving and shrinkage of geopolymer matrix. Bamboo shaving has great potential as reinforcer in developing low-cost geopolymer composites and may be used for applications up to 400 degrees C.
摘要：
Solid wood bending component has good mechanical properties and unique artistic characteristics. To investigate bending properties of solid wood and its mechanism, this paper has conducted the studies of softening and bending teakwood which is chosen as raw material, vacuum impregnation was carried out with environmentally friendly triethanolamine (TEA), sodium chloride (NaCl) and sodium dodecyl benzene sulfonate (SDBS) as compound softening solution, and the wood was softened with superheated steam as the medium. The results show that the infiltration of softening solution can increase the content of O and N elements in the wood and form C-NH2 and C-N bonds with C element. When the concentration of softening solution is 15% (m/m), the wood presents the best bending property, and the bending coefficient can reach 1/9.24, which is 20.48% higher than that of the untreated wood, and the qualification rate of bending components is increased to 85%. After drying and shaping, compression strength parallel to grain and bending strength increased by 22.91% and 20.82%, as well the indentation modulus and hardness of the cell wall increased by 16.70% and 21.45%, respectively. Meanwhile, the wet swelling rate and chord length change rate decreased by 51.39% and 3.37%.
作者机构：
[Wu, Yiqiang; Deng, Songlin; Qing, Yan; Jia, Shanshan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.;[Jia, Shanshan] Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Peoples R China.
通讯机构：
[Yiqiang Wu; Yan Qing] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, PR China<&wdkj&>College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, PR China
摘要：
Inspired by the biomaterial nacre, we report a versatile and facile strategy to rugged, flame retardant super-hydrophobic materials by embedding a nacre-like montmorillonite (MMT) based gas barrier layer into hierar-chical epoxy-resins. The well-aligned MMT layer imparted excellent oxygen and water barrier properties that rendered the coating surface water repellent yet protected the substrate materials from fire by suppressing heat and oxygen transfer. The hierarchical epoxy not only provided the robust superhydrophobic structure but offered strong adhesion to MMT layer. After application of this coating to a flammable sponge, it demonstrated super-hydrophobicity with a contact angle of similar to 153 degrees. Furthermore, the material was rugged, resisting 1200 compression cycles and induced marked flame retardancy. The coated sponge delayed ignition (689% delay in ignition time) and promoted significant flame extinguishing property, compared with the uncoated material (demonstrated by LOI, CONE combustion, and fire scenario tests). Owing to its robustness and multi-functionality, the coated sponge was able to efficiently separate oil from multi-environments including strong corrosive, icy, boiling or vibrating mixtures. Additionally, the versatile application to wood, cotton, textile and other lignocellulosic substrates has been verified. This research opens up a new direction for durable waterproof and fireproof materials.
摘要：
Thermal treatment is gaining increasing attention for bamboo modification in practical production due to its advantages of simplicity, effectiveness and environmental friendliness, particularly in the production of bamboo scrimber. The objective of this study is to investigate the effects of two typical thermal modification methods on the physical, mechanical and fire performance of bamboo scrimber, as well as the related physicochemical properties of bamboo bundles for production purpose. The results indicated that the two types of bamboo scrimber processed distinct advantages in terms of physical and mechanical performances. Specifically, the one processed with bamboo bundles treated by superheated steam at a temperature of 200 degrees C (referred to as the "HL group"), exhibited exceptional dimensional stability and fire resistance, while exhibiting slightly lower mechanical properties. Notably, the HL group exhibited a significantly more pronounced hue compared to the LS group, which was treated with saturated vapor at a temperature of 140 degrees C. Both demonstrated exceptional water resistance, with the HL group surpassing that of the LS group in either 24-hour room temperature or a combination of boiling-drying cycling treatments. The MORs of the LS group were determined to be 152.3 MPa and 108.5 MPa under dry and wet conditions, respectively, exhibiting significantly higher values than those observed in the HL group. Conversely, the variation of MOEs was found to be opposite. Both MORs and MOEs of the two groups exhibited a significant decrease in wet condition compared to those in dry condition, with reductions linearly correlated to water absorption of the samples. The failure mode of the LS group demonstrated elastoplastic failure characterized by a "Z-shaped", while the HL group exhibited with a relatively flat cross-section. Furthermore, the HL group demonstrated superior fire performance in comparison to the LS group, and as evidenced by a significantly denser char residue surface with fewer and wider cracks than that of the LS group. The variations of chemical components and microstructures in bamboo can be attributed to variances in the extent of degradation of hemicellulose, lignin, and even cellulose during the thermal modification processes. The water resistance, dimensional stability and fire performance of bamboo scrimber can be significantly improved through thermal treatment, while resulting in a decrease in MOR, particularly for the HL group. The HL and LS groups of bamboo scrimber both exhibited excellent performances, making them suitable for application as structural engineering materials. The work we conducted offers experimental and theoretical support for improve the pre-treatment procedures of bamboo in the manufacturing of bamboo scrimber for structural utilizations.
摘要：
The autofluorescence phenomenon is an inherent characteristic of lignified cells. However, in the case of Lophira alata (L. alata), the autofluorescence is nearly imperceptible during occasional fluorescence observations. The aim of this study is to investigate the mechanism behind the quenching of lignin's autofluorescence in L. alata by conducting associated experiments. Notably, the autofluorescence image of L. alata observed using optical microscopy appears to be quite indistinct. Abundant extractives are found in the longitudinal parenchyma, fibers, and vessels of L. alata. Remarkably, when subjected to a benzene-alcohol extraction treatment, the autofluorescence of L. alata becomes progressively enhanced under a fluorescence microscope. Additionally, UV-Vis absorption spectra demonstrate that the extractives derived from L. alata exhibit strong light absorption within the wavelength range of 200-500 nm. This suggests that the abundant extractives in L. alata are probably responsible for the autofluorescence quenching observed in the cell walls. Moreover, the presence and quantity of these extractives have a significant impact on the fluorescence intensity of lignin in wood, resulting in a significant decrease therein. In future studies, it would be interesting to explore the role of complex compounds such as polyphenols or terpenoids, which are present in the abundant extractives, in interfering with the fluorescence quenching of lignin in L. alata.
作者机构：
Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China;School of Chemical Engineering, Zhengzhou University, Zhengzhou, China;Department of Chemistry, Sardar Patel University, Mandi, India;[Ahmadzadeh S.] Pharmaceutics Research Centre, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran;College of Chemical Engineering, North China University of Science and Technology, Tangshan, China
通讯机构：
[Chongqing Wang; Yijun Cao] S;[Zhangxing He] C;School of Chemical Engineering, Zhengzhou University, Zhengzhou, China<&wdkj&>School of Chemical Engineering, Zhengzhou University, Zhengzhou, China<&wdkj&>College of Chemical Engineering, North China University of Science and Technology, Tangshan, China
摘要：
Significant pursuits have been committed to manufacturing high-performance lignin carbon-based supercapacitor electrode materials due to their high carbon content, abundant raw resources, and environmentally-friendly. However, the pessimistic accessible porous structure and appetency to the electrolyte of electrode materials are two vital factors for restricting its performance. Here, a bidirectional pore-creating strategy is proposed to construct heteroatom-doped lignin-based porous carbon (HLPC) materials with a high electrochemical active area at supramolecular-level. In this process, activated-mediates with different pore-forming functions are assembled into lignin-based supramolecules by electrostatic forcing, and then hierarchical pore-creation and heteroatom doping are accomplished simultaneously in the pyrolysis process. The obtained carbon materials possess a tunable specific surface area of 543.4–1502.3 m2 g−1 and high heteroatom content of 9.4–16.2 at.%. Benefit from its admirable physicochemical properties, the HPLCs deliver a high ions appetency, ultrahigh capacitance of 380.5 F g−1 at 0.2 A g−1, and extremely long cyclic stability (100% after 10,000 cycles), which is superior 2.5-fold than that of YP-80F at the same mass loading. More promising, symmetrical electrode devices based on HLPCs possess a preeminent energy density of 30.0 Wh kg−1 in aqueous electrolyte. Overall, this protocol provides a new avenue for promoting the advancement of electrode materials in industrial-scale supercapacitors and manufacturing high-value-added products from plentiful bio-waste.
摘要：
The construction of oxygen reduction reaction (ORR) electrocatalysts with well-textured structure and desirable activity remains great challenge for the complicated procedures and poor interface. Herein, inspired by sea anemones, the highly ordered Co-based carbon nanotubes electrocatalysts were elaborately assembled on wood fibers via stoichiometry. The porous cell-wall and abundant oxygen groups in lignocellulosic scaffold impose such preferable structure, in which the Co-based carbon nanotubes with Co single atoms and Co nanoparticles were tuned to possess higher catalytic activity and capture more oxygen species. As expected, the as-prepared electrocatalyst displays outstanding ORR performance with a half-wave potential of 0.9 V. The assembled Zn-air battery using this cathode catalyst shows a high-power density of 196 mW cm-2, superior to the commercial Pt/C catalysts. This work could inspire developing other biomimetic architectures for high-performance energy storage and conversion systems.
作者机构：
[Yu Liao; Yangyang Chen; Lei Li; Sha Luo; Yan Qing; Cuihua Tian; Han Xu; Jingxian Zhang; Yiqiang Wu] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004 China
摘要：
Urea Electrooxidation In article number 2303300, Yan Qing, Yiqiang Wu, and co‐workers develop an ultrafine homologous Ni2P–Co2P heterostructure via a topological transformation strategy. The Co incorporation reduces the generation potential of the surface reconstructive active species and optimizes the absorption/desorption energy of the intermediates, achieving a superior urea electrooxidation activity, promising for use in simultaneous urea‐enriched wastewater treatment and energy‐saving hydrogen production or electricity generation.
