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Large-scale fabrication of transparent bamboo structural materials with turnable mechanical strength

Composites Part B: Engineering 2025年 303卷

作者： Yang, Bin Dong, Hongping Cai, Zhiyong Chen, Wenshuai Liu, Zheying Xu, Kang Li, Xiazhen Li, Xianjun College of Material Science and Engineering Central South University of Forestry and Technology Changsha410004 China USDA Forest Products Laboratory MadisonWI3726-2398 United States Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China

The great challenge associated with existing transparent bamboo is the inability to fabricate large-sized homogeneous materials. This limitation stems from the unique characteristics of bamboo, including its thin and hollow walls, lack of transverse structure and continuous density gradient. Here, a transparent bamboo was proposed, incorporating the natural structure of bamboo fibers scaffolds and advanced weaving techniques to construct a sturdy bamboo fiber scaffold, which was then impregnated with epoxy resin. This approach aimed to enhance transverse strength while addressing size limitations. The obtained transparent bamboo had excellent transparency effect. Furthermore, by optimizing the weaving structure, the anisotropy of transparent bamboo can be adjusted to isotropy, and the absolute error of longitudinal and transverse tensile strength was reduced from 29.9 to 0.7 to obtain homogeneous materials. Finally, the lattice interlocking structure was designed to fabricate a transparent bamboo measuring 2300 mm in length, 530 mm in width, and 1 mm in thickness, which was 66.9 times that of the previously reported transparent bamboo. By integrating its bamboo weaving-based industrial fabrication technology, controllable mechanical strength, and infinitely scalable production capabilities, this transparent bamboo emerged as a highly promising candidate for application in energy-efficient building constructions. © 2025 Elsevier Ltd

关键词： Tensile strength

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Corrigendum to “Locating nitrate ions in the extraction and separation of trivalent Am and Eu by NTAamide: Quantum chemistry and molecular dynamics probe” [Sep. Purif. Technol. 337 (2024) 126442]

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Separation and Purification technology 2024年 340卷

作者： Juan Wang Yu-Chang Hou Long Li Yuan-Ru Guo Song-Dong Ding Qing-Jiang Pan Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China College of Chemistry Sichuan University Chengdu 610064 China Key Laboratory of Bio-based Material Science & Technology (Ministry of Education) College of Material Science and Engineering Northeast Forestry University Harbin 150040 China

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Strong Photo-Thermal Coupling Effect Boosts Co2 Reduction into Ch4 in a Concentrated Solar Reactor

SSRN

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SSRN 2023年

作者： Li, Naixu Xu, Lei Ren, Yuqi Liu, Maochang Zhu, Fengfan Cheng, Miao Zhou, Jiancheng Chen, Wenshuai Wang, Ke Wang, Nan School of Chemistry and Chemical Engineering Southeast University No.2 Dongnandaxue Road Jiangsu Nanjing211189 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University No.28 Xianning West Road Shaanxi Xi'An710049 China Key Laboratory of Bio-Based Material Science and Technology Ministry of Education Northeast Forestry University No. 26 Hexing Road Harbin150040 China

This study is dedicated to solving the problems of low energy utilization and low yield in the conventional photocatalytic CO2 reduction process. In this work, a novel concentrated solar (light) reactor was established to improve solar energy utilization efficiency and CO2 conversion rate by concentrating light and heat (that is, by converting light into heat). The TF@TNT/0.4CoOx-0.1CuO monolithic photocatalyst based on titanium foam was designed and prepared. The results showed that the light intensity increased by ~10.6 times (from 400 mW/cm2 to 4266 mW/cm2) while the yield of CH4, the product of CO2 reduction driven by photo-thermal coupling effect, increased by ~220 times (from 0.53 µmol/cm2 to 116.4 µmol/cm2) in the concentrated solar (light) reactor. The results of CH4 yield, electrochemical measurement, and apparent activation energy calculation were investigated in the concentrator reactor under the conditions of concentrated and non-concentrated irradiation of simulated sunlight in different wavelength ranges. It can be found that the concentrated light and the induced photo-thermal coupling effect can significantly reduce the reaction barrier (from 41.62 to 31.51 kJ/mol) and improve the conversion efficiency of solar energy to chemical energy by ~15 times. This provides a potentially feasible method for efficient and green utilization of CO2 driven by solar energy. © 2023, The Authors. All rights reserved.

关键词： Solar energy

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Uniform Grafting of Amino-Functionalized Multi-Walled Carbon Nanotubes on the Surface of Oxidized Bamboo Fiber to Enhance the Interfacial Strength with Epoxy Resin

SSRN

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SSRN 2022年

作者： Ding, Runzi He, Xiuwen Hu, Yi Yan, Jie Lu, Jiqing Shi, Sheldon Q. Han, Guangping Cheng, Wanli Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Harbin150040 China Mechanical Engineering Department University of North Texas UNT Discovery Park 3940 North Elm St. Suite F101P Texas76207-7102 United States

The objective of this paper is to improve the interfacial bonding between the oxidized bamboo fiber and epoxy resin by grafting amino-functionalized multi-walled carbon nanotubes. Bamboo fiber was oxidized by a 2,2,6,6-Tetramethylpiperidine-1-oxyl oxidation system. The amino-functionalized multi-walled carbon nanotubes were then grafted on its surface by impregnation method. It was found by single fiber pull-out testing that the interfacial bonding between the bamboo fiber and epoxy resin was improved by 31.5% after the oxidation treatment of the fiber. After further grafting 0.5wt% amino-functionalized multi-walled carbon nanotubes, the interfacial bonding was improved by 106.4%. The fracture morphologies and AFM scanning results of individual sample revealed the mechanism of the treatment from amino-functionalized multi-walled carbon nanotubes strengthens interfacial bonding between the fiber and epoxy. The effect of the amino-functionalized multi-walled carbon nanotubes content on the interfacial properties of the bamboo fiber/epoxy resin was investigated, a threshold for the content was identified. © 2022, The Authors. All rights reserved.

关键词： Epoxy resins

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Polyether-polyester and HMDI based Polyurethanes:Effect of PLLA Content on Structure and Property

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Chinese Journal of Polymer science 2019年第11期37卷 1152-1161页

作者： Lei Shi Ruo-Yu Zhang Wu-Bin Ying Han Hu Yu-Bin Wang Ya-Qian Guo Wen-Qin Wang Zhao-Bin Tang Jin Zhu Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Material Science and Chemical Engineering Ningbo University Ningbo 315211 China

Thermoplastic poly(ether-ester-urethane)s were synthesized from poly(L-lactide) diols (PLLA diols), polytetrahydrofuran diol (PTMG diols), 4,4'-dicyclohexylmethane diisocyanate (HMDI), and 1,4-butanediol (BDO) by a two-step reaction, and the morphology and property of the resultant TPU could be adjusted by varying the PLLA contents. The soft segment was composed of PLLA and PTMG diols. By controlling the percentage of PLLA in the soft segment, the glass transition temperature and mechanical properties of the polyurethanes could be regulated. based on the FTIR spectrum, we found that two kinds of hydrogen bonding existed individually in soft matrix and hard domain. The hydrogen bonding in soft matrix was unstable, which could be destroyed during elongation. With in situ stretching WAXS and SAXS experiments, we found that the PLLA crystal was destroyed and the PLLA domain oriented along the stretch direction. Finally, we proposed a schematic model to illustrate the microstructures of these elastomers before and after stretch.

关键词： Poly(L-lactide) diol Polyurethane Mechanical property Hydrogen bonding

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Cobalt-catalyzed transfer hydrogenation of nitroarenes to arylhydroxylamines with NH 3 BH 3 : Scope and mechanism

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Journal of Catalysis 2025年 449卷

作者： Dawei Gong Yanlin Zhang Qixuan Li Yufei Li Linan Xing Lina Zhao Degong Kong Key Laboratory of Preparation and Application of Environmental Friendly Materials Ministry of Education College of Chemistry Jilin Normal University Changchun 130103 PR China Department of Chemistry Southern University of Science and Technology Shenzhen 518000 PR China Key Laboratory of Bio-Based Material Science and Technology Ministry of Education College of Material Science and Engineering Northeast Forestry University Harbin 150040 PR China

A novel cobalt-catalyzed transfer hydrogenation of nitroarenes to arylhydroxylamines using ammonia borane (NH 3 BH 3 ) in methanol has been developed. The cobalt catalyst exhibits good selectivity without producing over-reduced by-products. Density functional theory (DFT) calculations and control experiments provide valuable insights into the reaction mechanism, revealing the N–H moiety of NH 3 BH 3 as a key participant in nitroarene reduction. Moreover, DFT calculations reveal that selective control is achieved via the unique square-pyramidal coordination of the cobalt complex with NH 3 BH 3 and hydroxylamine. This coordination ensures that the reduction of nitrobenzene halts at the hydroxylamine stage, enabling the selective reduction of nitrobenzene to hydroxylamine. Moreover, methanol is indirectly involved in the reaction and does not provide hydrogen atoms directly for nitroarene reduction, which differs from the classical solvent-mediated protonolysis mechanism. This study presents a novel and straightforward method for synthesizing arylhydroxylamines.

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Corrigendum to “A semi-transparent polyurethane/porous wood composite polymer electrolyte for solid-state supercapacitor with high energy density and cycling stability” [Chem. Eng. J. 454 (2023)139954]

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Chemical Engineering Journal 2023年 467卷

作者： Pu Hou Chenxiang Gao Jian Wang Jiuzhou Zhang Yang Liu Jiyou Gu Pengfei Huo Material Science and Engineering College Northeast Forestry University Harbin 150040 China Key Laboratory of Bio-based Materials Science & Technology (Northeast Forestry University) Ministry of Education Harbin 150040 China

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Effect of Adsorption of ZrO2 in Catalysts on the Efficiency of Hydrolysis of Cellulose to Sugar in Aqueous System under Microwave Radiation

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Chinese Journal of Chemistry 2020年第4期38卷 399-405页

作者： Ying Qiao Lixin Feng Zhongqiu Li Zhenyu Zhang Jing Chen Haining Na Jin Zhu Lai Chen Department of Polymer College of Material Science and EngineeringShanghai UniversityShanghai 200444Chino Key Laboratory of Bio-based Polymeric Materials of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboZhejiang 315201China Chemical College Shijiazhuang UniversityShijiazhuangHebei 050035Chino Hebei Building Ceramics Engineering Research Center Shijiazhuang UniversityShijiazhuangHebei 050035Chino

Summary of main observation and conclusion Five types of ZrO2 are used to simply establish an effective aqueous catalytic system with sulfuric acid for the hydrolysis of cellulose to sugar,*** adjusting surface roughness and particle size of ZrO2 dfferent adsorption is ***,following the thought to inhibit the self-aggregation nature of cellulose,after the introduction of ZrO2 with adsorption in catalysts,the efficiency of the hydrolysis of cellulose to sugar is *** results show different ZrO2 can produce different effects during the hydrolysis of the cellulose with rela-tively low *** the optimal conditions,the conversion of cellulose and TRS yield reaches 95.5%and 93.6%,*** this re-search,it reveals the critical point to organize a feasible and useful way for the hydrolysis of cellulose to sugar with high efficiency in an aqueous *** important theoretical and technical support is also provided for the conversion and utiliation of cellulose in the future.

关键词： hydrolysis sugar adsorption

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Development and optimization of lithium-ion sieves through machine learning in complex brine systems

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Separation and Purification technology 2025年 374卷

作者： Birong Yan Yimin Shi Shengkai Liu Wei Wang Zhichen Ba Huiling Li Jing Wang Zefang Xiao Tai Peng Daxin Liang Yanjun Xie Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 PR China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 PR China School of Materials Science and Engineering Jiamusi University Jiamusi 154007 PR China

Lithium ion sieves and their composite materials show great potential in lithium extraction due to their high selectivity and adsorption capacity. However, their performance varies significantly under different conditions due to complex ion interactions and environmental factors, making process optimization challenging with traditional experimental methods. A comprehensive machine learning approach was developed using 12 key material and environmental parameters to predict lithium-ion sieves adsorption performance. Among nine machine learning methods evaluated, the optimized XGBoost model demonstrated superior predictive capability (R 2 = 0.9736 for training, R 2 = 0.8916 for testing) in handling the inherent nonlinearity of adsorption systems. SHapley Additive exPlanations analysis revealed the dominant influence of environmental parameters on adsorption behavior, providing mechanistic insights into the adsorption process. The reliability of the model was validated through 56 independent experiments with three different composite adsorbents (R 2 = 0.7696). A Python-based prediction system was developed for rapid performance assessment. This data-driven strategy establishes a rational framework for optimizing process parameters and developing materials, thereby advancing the industrialization of sustainable lithium extraction technologies.

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Phosphate Adsorption on Amorphous Aluminum Hydroxide-Yielded Transition Aluminas: Insights on Fundamental Chemistry and Making Engineering Adsorbents

SSRN

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SSRN 2022年

作者： Wang, Chunmei Li, Wei Zhao, Xueqin Chen, Zhen Li, Yonghuan Wang, Guichang Dou, Xiaomin Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Key Laboratory of Surficial Geochemistry Ministry of Education School of Earth Sciences and Engineering Nanjing University Nanjing210023 China College of Chemistry Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education Tianjin Key Lab and Molecule-Based Material Chemistry Synergetic Innovation Center of Chemical Science and Engineering Nankai University Tianjin300071 China

Transition aluminas (TAs) are evolved alumina polymorphs during mineral phase transformation from amorphous to crystalline structure, which have been extensively used as engineering adsorbents or platforms of functional materials for pollutants (e.g. eutrophication nutrient PO43-) mitigation in water remediation. A well-understanding of structure-binding activity of pollutants on transition aluminas is essential for developing promising water remediation materials. In this work, TAs were synthesized through annealing amorphous aluminum (oxy)hydroxide, and a decreased trend of phosphate (PO43-) adsorption was observed, which was not in pace with the changes of specific surface areas and site densities. The structure disorders of TAs deteriorated continuously peaked at 700 oC and TA at 700 oC has the largest extent of structural disorder, but does not present the highest adsorption capacity, which is not consistent with the consensus that oxides’ structural disorder facilitate adsorption. Multiple techniques including pair distribution function, selective chemical extraction, 27Al NMR and quantum chemistry were employed to reveal the underneath mechanisms of differences on phosphate adsorption behaviors on TAs. The results indicated the fraction of amorphous contents is the key feature governing PO43- adsorption, regardless of mineral phase, structural disorder, AlOIV/AlOVI arrangement, and Gibbs free energy of adsorption. Three strategic measures are suggested on making promising alumina engineering adsorbents, including tuning transition temperature, introducing non-tetrahedral and non-octahedral nanostructured grains, and employing more potential methods for synthesizing amorphous nanocrystalline composite. This work sheds lights on understanding the fundamental chemistry of phosphate on transition alumina and producing prospective alumina remediation materials. © 2022, The Authors. All rights reserved.

关键词： Alumina

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