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Improving antioxidant activities of water-soluble lignin-carbohydrate complex isolated from wheat stalk through prolonging ball-milling pretreatment and homogeneous extraction

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Journal of Bioresources and Bioproducts 2024年第1期9卷 113-125页

作者： Di Xie Zhulan Liu Yunfeng Cao Sheng-I Yang Chen Su Mi Li Jiangsu Co-innovation Center for Efficient Processing and Utilization of Forest Products Nanjing Forestry UniversityNanjing 210037China International Innovation Center for Forest Chemicals and Materials Nanjing Forestry UniversityNanjing 210037China Center for Renewable Carbon School of Natural ResourcesUniversity of TennesseeKnoxvilleTN 37996USA Shandong Huatai Paper Co. Ltd.Dongying 257000China School of Natural Resources University of TennesseeKnoxvilleTN 37996USA Key Lab of Biomass Energy and Material Institute of Chemical Industry of Forest ProductsChinese Academy of ForestryJiangsu ProvinceNanjing 210042China

Water-soluble lignin-carbohydrate complex(LCC)rich in polysaccharides exhibits benign in vitro antioxidant activities and distinguishes high biocompatibility from lignin-rich LCC and lignin.However,the antioxidant activity of water-soluble LCCs remains to be improved and its structure-antioxidant relationship is still uncertain.Herein,structurally diversified water-soluble LCCs were isolated under different ball-milling pretreatment durations(4,6,8 h),extraction pathways(ho-mogeneous and heterogeneous),and isolation routines(water extracts and residues after water extraction).Their structures were characterized by wet chemistry,chromatography and spec-troscopies.Antioxidant activities were evaluated by ferric reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl radicals scavenging rate(RDPPH).Results show that altering ball-milling duration and isolation procedures cause varied structures and antioxidant activities of the water-soluble LCCs.Specifically,prolonging ball-milling duration to 8 hours and homogeneous extrac-tion can enhance their antioxidant activity through releasing more phenolic structures and pro-moting the extraction of high-molecular-weight LCCs via reducing mass-transfer resistance,re-spectively.As a result,the RDPPH of water-soluble LCCs reaches up to 97.35%,which is associated with the arabinan content with statistical significance(P<0.05).This study provides new insights into the structure-antioxidation relationship of herbaceous LCC as potential antioxidants.

关键词： LCC Homogeneous extraction ball-milling Structure-antioxidation relationship Wheat straw

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Innovative preparation of Co@Cu Fe_(2)O_(4) composite via ball-milling assisted chemical precipitation and annealing for glorious electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 559-569页

作者： Xing Feng Pengfei Yin Limin Zhang Xiyuan Sun Jian Wang Liang Zhao Changfang Lu Zhihua Gao Yongxin Zhan College of Science Sichuan Agricultural UniversityYa’an 625014China School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

To deal with the growing electromagnetic hazards,herein a Co@CuFe_(2)O_(4)absorbing agent with excellent impedance matching at thin thickness was obtained via an innovative route of ball-milling assisted chemical precipitation and annealing.The as-prepared composite possesses excellent interface polarization ability due to sufficient contact between CuFe_(2)O_(4)NPs and flat Co,and this compressed Co lamella can also provide sufficient eddy current loss.Moreover,the dipole polarization,electron hopping/conduction,and structural scattering also contribute to the broadband microwave absorption of the composite.Thus,the minimum microwave reflection loss achieves-35.56 d B at12.93 GHz for 1.8 mm thickness,and the broadest efficient absorption bandwidth can reach 6.74 GHz for a thinner thickness of 1.72 mm.The preparation method reported here can be referenced as a new-type route to manufacture electromagnetic absorbers with outstanding performance.

关键词： electromagnetic wave absorption ball-milling cobalt copper ferrite

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Particles and porous tablets based on Fe^0/ZSM-5 composites prepared by ball-milling for heavy metals removal: Dissolved Fe^(2+), pH, and mechanism

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Journal of Environmental Sciences 2018年第10期30卷 33-42页

作者： Chunfeng Wang Dan Yao Yang Liu Yanchen Zhu Guanfei Chen Jianxin Zhu Henan Key Laboratory for Environmental Pollution Control and Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Ministry of Education School of Environment Henan Normal University Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Novel, low-cost Fe0/ZSM-5-based particles and porous tablets were prepared by a ballmilling method and used for the removal of Pb^2＋ in solution. Solid-phase characterization by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy（SEMEDS） and transmission electron microscopy（TEM） revealed that the Fe0 microparticles were evenly loaded and tightly immobilized on the surface of ZSM-5 because of the extrusion/welding impact during ball-milling. For different Pb2＋ concentrations, batch experiments indicated that the removal of Pb2＋ increased with the decline of dissolved Fe2＋and p H value in the solution for particles; opposite results were obtained for the tablets. The differences in the contact between both materials and Pb2＋ were the main factor controlling Pb2＋ removal in the solution. Investigation into the effect of initial pH value revealed that high pH reduced the number of electrons released from Fe corrosion. Consequently, low levels of removed Pb2＋ and dissolved Fe2＋ were synchronously observed. Also, simulated electroplating wastewater was treated using the prepared particles and porous tablets,and the removal order of Pb^2＋〉 Cr6^＋〉 Cu^2＋≈ Cd^2＋ was observed. The Fe0/ZSM-5 particles and tablets prepared through ball-milling show potential as materials for treatment of Pb2＋ and other toxic metals.

关键词： Fe0 microparticles ball-milling ZSM-5 Heavy metal Removal

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Hydriding-dehydriding properties of Mg_2Ni alloy modified by ball-milling in tetrahydrofuran

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Rare Metals 2004年第2期23卷 138-142页

作者： CHEN Changpin WANG Wei CHEN Yun CHEN Lixin WANG Qidong Department of Materials Science and Engineering, Zhejiang University Hangzhou 310027, China Department of Materials Science and Engineering Zhejiang University Hangzhou 310027

A new approach of ball-milled Mg_2Ni in tetrahydrofuran (THF) to improve thehydriding kinetics of Mg_2Ni alloy is suggested and studied. It is found that the modified alloydisplayed the improved activity for hydriding even at relatively low temperature (e.g., 323-373 K).In the case of the sample milled in THF for 20 h, the hydrogen content (mass fraction) reaches 1.6 %at 323 K, 2.1% at 348 K and 3.4% at 448 K, respectively. The use of THF during grinding led to thechange of the structure, which is reflected by the broadening and weakening of the diffraction peaksin the XRD spectra. The XPS analysis shows that Mg (2s) binding energy peak of Mg_2Ni aftermodification shifted from a lower binding energy to a higher one, indicating the charge transferencebetween Mg and THF and the formation of catalytically active electron donor-acceptor (EDA)complexes on the surface of modified Mg_2Ni alloy.

关键词： metal materials Mg_2Ni alloy ball-milling tetrahydrofuran hydriding-dehydriding property

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ball-milling Synthesis of Tetrahydroquinolines via 'One-pot' Three-component Diels-Alder Reaction Catalyzed by Phosphotungstic Acid

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Chemical Research in Chinese Universities 2020年第5期36卷 835-842页

作者： WANG Zeyou SHEN Guodong HUANG Xianqiang GONG Shuwen YANG Bingchuan SUN Zhenzhen ZHANG Zuhao LIU Wanxing School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252000P.R.China Department of Chemistry Liaocheng Chemical Institute of Industrial ScienceLiaocheng 252000P.R.China

We reported an economic and practical ball-milling method for the synthesis of tetrahvdroquinoline derivatives via a wone-pot"three-component Diels-Alder reaction of anilines,aldehydes and alkenes catalyzed by phos-photungstic acid at room temperature.For this reaction,a simple 'one-pot'ball-milling operation was conducted,readily available starting materials were employed,'one-pot'conditions were applied,and the most important was to use inexpensive and environmentally friendly catalyst phosphotungstic acid.Various tetrahvdroquinolines,which might be potentially applicable in the pharmaceutical and biochemical areas,were conveniently synthesized in moderate to excellent yields.

关键词： ball-milling Diels-Alder reaction Phosphotungstic acid Tetraliydroquinoline

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Electrochemical Properties of CeMg_(12)+x%Ni Composites (x=0～200) Prepared by ball-milling

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Journal of Rare Earths 2005年第3期23卷 382-385页

作者：王丽王新华陈长聘肖学章 Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

The electrochemical properties of the as-cast and ball-milled CeMg12+x%(mass fraction) Ni (vs. CeMg12) (x=0, 50, 100 and 200) composites were investigated. The microstructure and discharge capacity of the ball-milled CeMg12+x%Ni composites differ greatly depending on the amount of Ni introduced during ball-milling. The more nickel powder added, the more advantageous for the formation of the amorphous structure. And the discharge capacities of the ball-milled composites increase with increasing amount of nickel added. After 90 h ball-milling, the CeMg12+200% Ni composite exhibits a high discharge capacity of 1170 mAh·g-1(CeMg12)-1 at 303 K. The improvement of electrochemical capacity is attributed to the formation of a homogeneous amorphous structure as well as the modification of the surface state after Ni addition.

关键词： hydrogen storage alloy CeMg12 amorphous ball-milling electrochemical properties

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Solvent-free 1,3-Dipolar Cycloaddition of Azomethine Imines with Terminal Alkynes Promoted by Calcium Fluoride Under the ball milling Condition

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Chemical Research in Chinese Universities 2015年第4期31卷 543-548页

作者： CHEN Xianglong JIA Chunman CAO Li ZHANG Dela LIU Shuixiang ZHANG Qil Hainan Provincial Key Lab of Fine Chem. Key Study Center of Ministry of Education for Tropical Resources Utilization Hainan University Haikou 570228 P R. China

A convenient and efficient procedure for the synthesis ofN, N-bicyclic pyrazolidinone derivatives has been developed via the reaction of azomethine imines with terminal alkynes under the ball milling condition without sol- vent, which was promoted by calcium fluoride with a catalyst of copper（I） salt. The cyclization reactions exhibited moderate to high yields.

关键词： ball-milling 1,3-Dipolar cycloaddition Click chemistry Solvent-free reaction

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Effect of ball-milling Time on the Performance of Ni-Al2O3 Catalyst for 1,4-Butynediol Hydrogenation to Produce 1,4-Butenediol

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China Petroleum Processing & Petrochemical Technology 2020年第1期22卷 78-86页

作者： Gao Xianlong Mo Wenlong Ma Fengyun He Xiaoqiang Key Laboratory of Coal Clean Conversion&Chemical Engineering Process(Xinjiang Uyghur Autonomous Region) College of Chemistry and Chemical EngineeringXinjiang UniversityUrumqi 830046

The Ni-Al2O3 catalyst was prepared by the mechanochemical method in combination with a planetary ballmilling machine.Effect of milling time on the crystal structure,the reduction characteristics and the catalytic performance of Ni-Al2O3 catalyst for hydrogenation of 1,4-butynediol to produce 1,4-butenediol were investigated.The catalysts were characterized by PSD,EDX,XRD,H2-TPR,BET,TEM,and NH3-TPD methods.Results showed that the MCt2.5 catalyst treated at a ball milling time of 2.5 h could form a smallest particle size of 191.0 nm.The evaluation experiments revealed that the activity of the prepared catalyst increased at first and then reached a constant value with the extension of ballmilling time.The BYD conversion,BED selectivity and yield on the MCt2.5 catalyst reached 35.63%,33.48%and 32.46%,respectively,which were higher than those obtained by other samples.The excellent performance of MCt2.5 sample is mainly related to the following three reasons from characterization results.Firstly,it has a smallest particle size of 191.0 nm;and then,the surface acidity(in terms of strong acids)of the catalyst was weaker than other catalysts;and eventually,the loading amount(23.84%)of the active component Ni exceeded the theoretical value(20%).

关键词： mechanochemical method Ni-Al2O3 catalyst 1 4-butynediol ball-milling time

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Effect of ball-milling technology on pore structure and electrochemical properties of activated carbon

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Journal of Shanghai University(English Edition) 2008年第4期12卷 372-376页

作者：张丽明张睿詹亮乔文明梁晓怿凌立成 State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237 P. R. China

The effects of particle size of activated carbon （AC） on its wettability, electrode coating technology and electric chemical performance were studied to assemble nonaqueous electric double layer capacitors （EDLCs） for high power requirements. The results show that the specific surface area and total pore volume of AC decrease from 2 137 m^2/g to 1 683 m^2/g, and 0.95 cm^3/g to 0.78 cm^3/g, respectively, if it is ball-milled for 8 h. The pore size distributions are similar in the range of 0.7 nm to 3.5 nm for different ball-milling time. There exists oxidation on the surface of AC during the ball-milling process and the ratios of O-C=O oxygen compositions increase whereas those of C-O, C=O decrease. The peeling strength of AC coated on current collector is almost inverse proportion with the particle size of AC as well as the resistance of EDLCs, and its capacitance decreases about 6%.

关键词： electric double layer capacitor （EDLC） ball-milling activated carbon （AC） electrode

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Mechanism of ball milled activated carbon in improving the desalination performance of flow-and fixed-electrode in capacitive deionization desalination

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Frontiers of Environmental Science & Engineering 2023年第5期17卷 145-154页

作者： Ge Shen Junjun Ma Jianrui Niu Ruina Zhang Jing Zhang Xiaoju Wang Jie Liu Jiarong Gu Ruicheng Chen Xiqing Li Chun Liu College of Environmental Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China Pollution Prevention Biotechnology Laboratory of Hebei Province Shijiazhuang 050018China

Capacitive deionization(CDI)is a novel electrochemical water-treatment technology.The electrode material is an important factor in determining the ion separation efficiency.Activated carbon(AC)is extensively used as an electrode material;however,there are still many deficiencies in commercial AC.We adopted a simple processing method,ball milling,to produce ball milled AC(BAC)to improve the physical and electrochemical properties of the original AC and desalination efficiency.The BAC was characterized in detail and used for membrane capacitive deionization(MCDI)and flow-electrode capacitive deionization(FCDI)electrode materials.After ball milling,the BAC obtained excellent pore structures and favorable surfaces for ion adsorption,which reduced electron transfer resistance and ion migration resistance in the electrodes.The optimal ball-milling time was 10 h.However,the improved effects of BAC as fixed electrodes and flow electrodes are different and the related mechanisms are discussed in detail.The average salt adsorption rates(ASAR)of FCDI and MCDI were improved by 134%and 17%,respectively,and the energy-normalized removal salt(ENRS)were enhanced by 21%and 53%,respectively.We believe that simple,low-cost,and environmentally friendly BAC has great potential for practical engineering applications of FCDI and MCDI.

关键词： ball-milling Capacitive deionization Fixed electrode Flow electrode

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