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Engineering pulp foam with highly improved water stability and multifunctional properties by incorporation of natural rubber and montmorillonite

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Green Carbon 2024年第2期2卷 231-241页

作者： Yidong Zhang Wangfang Deng Meiyan Wu Guang Yu Zhexuan Liu Na Cheng haishun du Chao Liu Bin Li CAS Key Laboratory of Biobased Materials System Integration Engineering CenterQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Department of Chemical Engineering Auburn University212 Ross HallAuburnAL 36849USA Shandong Energy Institute Qingdao 266101China Qingdao New Energy Shandong Laboratory Qingdao 266101China

Considering the aim of carbon neutrality and reducing plastic pollution,lightweight porous materials with good thermal insulation and mechanical robustness derived from renewable resources are in high ***-based pulp foams(PFs)offer considerable potential applications in many fields;however,the cost-effective manufacturing of PFs with satisfactory properties remains ***,we demonstrate a simple and low-cost strategy to prepare a novel pulp/natural rubber(PNR)foam by combining wood pulp fiber and natural rubber latex through wet foaming and oven drying,eliminating traditional freeze-drying and solvent exchange *** obtained PNR foam exhibited high porosity(98.4%-99.1%),low density(14.1–24.0 mg/cm^(3)),and excellent water stability(without disintegration under magnetic stirring for 14 days).Moreover,montmorillonite(MMT)was easily incorporated into the PNR during the preparation process,improving the mechanical strength and heat insulation of the obtained PNRMMT *** optimized PNR-MMT foam could be compressed more than ten times without losing its resilience,exhibiting a compressive strength of 2.7 MPa at 80%strain,five times higher than that of pristine ***,the PNR-MMT foam exhibited excellent flame retardant,good“spill”oil absorption,and good antibacterial properties towards Escherichia coli and Bacillus ***,this study provides a facile,sustainable,and low-cost route for manufacturing PNR-MMT foams with high resilience,good thermal insulation,excellent flame retardancy,and strong antibacterial properties,thus highlighting their usage potential in a broad range of applications.

关键词： Cellulose foam Natural rubber Montmorillonite Heat insulation Flame retardancy

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Cellulose Nanopaper:Fabrication,Functionalization,and Applications

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Nano-Micro Letters 2022年第6期14卷 323-349页

作者： Wei Liu Kun Liu haishun du Ting Zheng Ning Zhang Ting Xu Bo Pang Xinyu Zhang Chuanling Si Kai Zhang Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and TechnologyTianjin 300457People’s Republic of China Sustainable Materials and Chemistry Department of Wood Technology and Wood-Based CompositesUniversity of Göttingen37077 GöttingenGermany Department of Chemical Engineering Auburn UniversityAuburnAL 36849USA Department of Automotive Engineering Clemson UniversityGreenvilleSC 29607USA

Cellulose nanopaper has shown great potential in diverse fields including optoelectronic devices,food packaging,biomedical application,and so forth,owing to their various advantages such as good flexibility,tunable light transmittance,high thermal stability,low thermal expansion coefficient,and superior mechanical ***,recent progress on the fabrication and applications of cellulose nanopaper is summarized and discussed based on the analyses of the latest *** begin with a brief introduction of the three types of nanocellulose:cellulose nanocrystals,cellulose nanofibrils and bacterial cellulose,recapitulating their differences in preparation and ***,the main preparation methods of cellulose nanopaper including filtration method and casting method as well as the newly developed technology are systematically elaborated and ***,the advanced applications of cellulose nanopaper including energy storage,electronic devices,water treatment,and high-performance packaging materials were ***,the prospects and ongoing challenges of cellulose nanopaper were summarized.

关键词： Nanocellulose Cellulose nanopaper Cellulose nanocrystals Cellulose nanofibrils Cellulose nanomaterials

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Nanocellulose-Assisted Construction of Multifunctional MXene-Based Aerogels with Engineering Biomimetic Texture for Pressure Sensor and Compressible Electrode

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Nano-Micro Letters 2023年第7期15卷 122-135页

作者： Ting Xu Qun Song Kun Liu Huayu Liu Junjie Pan Wei Liu Lin Dai Meng Zhang Yaxuan Wang Chuanling Si haishun du Kai Zhang State Key Laboratory of Biobased Fiber Manufacturing Technology Tianjin Key Laboratory of Pulp and PaperTianjin University of Science and TechnologyTianjin 300457People’s Republic of China Sustainable Materials and Chemistry Department of Wood Technology and Wood-Based CompositesUniversity of Göttingen37077 GöttingenGermany Department of Chemical Engineering Auburn UniversityAuburnAL 36849USA State Key Laboratory of Bio-Based Materials and Green Papermaking Qilu University of Technology(Shandong Academy of Sciences)3501 Daxue RoadJinan 250353People’s Republic of China

Multifunctional architecture with intriguing structural design is highly desired for realizing the promising performances in wearable sensors and flexible energy storage *** nanofiber(CNF)is employed for assisting in building conductive,hyperelastic,and ultralight Ti_(3)C_(2)T_(x)MXene hybrid aerogels with oriented tracheid-like *** biomimetic hybrid aerogels are constructed by a facile bidirectional freezing strategy with CNF,carbon nanotube(CNT),and MXene based on synergistic electrostatic interaction and hydrogen *** CNF and CNT“mortars”bonded with MXene“bricks”of the tracheid structure produce good interfacial binding,and superior mechanical strength(up to 80%compressibility and extraordinary fatigue resistance of 1000 cycles at 50%strain).Benefiting from the biomimetic texture,CNF/CNT/MXene aerogel shows ultralow density of 7.48 mg cm^(-3)and excellent electrical conductivity(~2400 S m^(-1)).Used as pressure sensors,such aerogels exhibit appealing sensitivity performance with the linear sensitivity up to 817.3 kPa^(-1),which affords their application in monitoring body surface information and detecting human ***,the aerogels can also act as electrode materials of compressive solid-state supercapacitors that reveal satisfactory electrochemical performance(849.2 mF cm^(-2)at 0.8 mA cm^(-2))and superior long cycle compression performance(88%after 10,000 cycles at a compressive strain of 30%).

关键词： Nanocellulose Aerogels MXene Supercapacitors Pressure sensors

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High-performance supercapacitors based on Ni_(2)P@CNT nanocomposites prepared using an ultrafast microwave approach

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 1021-1032页

作者： Yunrui Tian haishun du Shatila Sarwar Wenjie Dong Yayun Zheng Shumin Wang Qingping Guo Jujie Luo Xinyu Zhang College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Chemical Engineering Auburn UniversityAuburnAL 36849USA

We present a one-step route for the preparation of nickel phosphide/carbon nanotube(Ni_(2)P@CNT)nanocomposites for supercapacitor applications using a facile,ultrafast(90 s)microwave-based ***2P nanoparticles could grow uniformly on the surface of CNTs under the optimized reaction conditions,namely,a feeding ratio of 30:50:25 for CNT,Ni(NO_(3))_(2)-6H_(2)O,and red phosphorus and a microwave power of 1000 W for 90 *** study demonstrated that the single-step microwave synthesis process for creating metal phosphide nanoparticles was faster and simpler than all the other existing *** results showed that the specific capacitance of the optimal Ni2P@CNT-nanocomposite electrode displayed a high specific capacitance of 854 F•g^(-1) at 1 A•g^(-1) and a superior capacitance retention of 84% after 5000 cycles at 10 Ag^(-1).Finally,an asymmetric supercapacitor was assembled using the nanocomposite with activated carbon as one electrode(Ni_(2)P@CNT//AC),which showed a remarkable energy density of 33.5 W•h•kg^(-1) and a power density of 387.5 W·kg^(-1).This work will pave the way for the microwave synthesis of other transition metal phosphide materials for use in energy storage systems.

关键词： Ni_(2)P CNT supercapacitors nanocomposites microwave

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基于通道重组和注意力机制的跨模态行人重识别

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激光与光电子学进展 2023年第14期60卷 65-76页

作者：霍东东杜海顺河南大学人工智能学院河南郑州450046

近年来,跨模态行人重识别逐渐成为了计算机视觉领域的热门研究方向之一。然而,在跨模态行人重识别任务中,高效地提取行人特征,进一步实现图像之间的交互融合、挖掘行人图像之间的潜在关系是至关重要的。为了解决这一问题,提出一种基于... 详细信息

近年来,跨模态行人重识别逐渐成为了计算机视觉领域的热门研究方向之一。然而,在跨模态行人重识别任务中,高效地提取行人特征,进一步实现图像之间的交互融合、挖掘行人图像之间的潜在关系是至关重要的。为了解决这一问题,提出一种基于通道分组重组和注意力机制的双流网络来提取两种模态之间更加稳定且丰富的特征。具体地:首先在主干网络中嵌入模态内特征通道分组重组模块以提取跨模态图像的共享特征,实现模态信息的交互融合;然后,通过聚合特征注意力机制及跨模态自适应图结构来挖掘不同模态行人图像之间的潜在关系,提取更具判别力的局部特征。在主流数据集SYSU-MM01、RegDB上进行的大量实验结果表明,所提算法在多个数据集上具有较好的泛化能力,与现有的主要算法相比,跨模态行人重识别精度达到较高的水准。

关键词：图像处理跨模态行人重识别通道分组重组注意力机制

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Energy Absorption by 3D-Printed Mesh Structures with a Negative Poisson’s Ratio

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 205-212页

作者： Wenyu Li Weiming Yang Mingze Li Xiang Zhang Ping Zhang Yucheng Zhao Peijian Chen haishun Liu School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou221116China School of Materials Sciences and Physics China University of Mining and TechnologyXuzhou221116China

A negative Poisson's ratio(NPR)structure represents optimal impact-resistance with applications in various fields,including the crash box in vehicles,which absorbs impact kinetic *** crash box is designed to deform in response to impact,increasing local structural density,which enhances impact resistance *** studies have only focused on the NPR effect in the plane dimension at low-speed *** studies have considered high-speed impact loads on three-dimensional NPR *** have developed two types of AlSi10Mg alloy energy-absorbing structures with NPR using three-dimensional printing technology,and have compared our systems with a conventional hexagonal mesh *** testing involved split-Hopkinson pressure bar measurements,which showed good agreement with dynamic numerical *** subjected to an impact load,the NPR structure exhibited better impact resistance and energy absorption compared with the positive Poisson's ratio *** proposed dual-layer hexagonal structure ensures an NPR effect while exhibiting higher strength and improved stability relative to the conventional concave hexagon structure.

关键词： Negative Poisson’s ratio Energy absorption 3D printing Split-Hopkinson pressure bar Numerical simulation

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Effects of annealing condition and Al content on novel Fe_(73.5)Si_(13.5)B_9Cu_1Nb_(3-x)Al_x alloys

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Rare Metals 2008年第5期27卷 545-549页

作者： LIU haishun du Youwei MIAO Xiexing HAN Kui SHEN Xiaopeng BU Wankui School of Sciences China University of Mining ＆ Technology Xuzhou 221008 China National Key Laboratory of Solid State Microstructure Nanjing University Nanjing 210093 China

The annealing condition, AI content, and field amplitude dependences of the complex permeability for Nb-poor Finemet type alloys, Fe73.5Si13.5B9Cu1Nba-xAlx （x = 0, 0.5, 1.5, 2.0, and 3.0）, were investigated using an impedance analyzer and X-ray diffraction. The results show that different AI contents lead to different optimum annealing conditions, and the A1 content exerts a distinct effect on microstructure thus resulting in a variety of real permeability value. For the samples annealed at 793 K for 0.5 h, the real permeability increases with an increase in A1 content when the AI content is below 2.0 at.%; as for those annealed at 793 K for 1 h and at 813 K for 0.5 h, an overall increase in real permeability can be obtained compared to those annealed at 793 K for 0.5 h. The permeability under different field amplitudes is also studied and it is found that the relaxation frequency in the lower frequency region tends to moving toward a higher frequency with an increase in field amplitude. All these might be because of the role of Nb in the annealing process and the solubility of AI in the amorphous matrix and nanocrystallized crystallites.

关键词： magnetism magnetic property impedance analysis Fe-based alloys

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Interfacial engineering of the layered oxide cathode materials for sodium-ion battery

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Nano Research 2024年第3期17卷 1441-1464页

作者： Quanqing Zhao Ruru Wang Ming Gao Faheem KButt Jianfeng Jia haishun Wu Youqi Zhu Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China Department of Physics Division of Science and TechnologyUniversity of EducationLahore 54770Pakistan Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

The layered metal oxides are reviewed as the hopeful cathode materials for high-performance sodium-ion batteries(SIBs)due to their large theoretical capacity,favorable two-dimensional(2D)ion diffusion channel,and simple ***,their cycling stability,rate capability,and thermal stability are still significantly concerned and highlighted before further practical *** chemical,mechanical and electrochemical stability of the cathode–electrolyte interfaces upon cycling is of great ***,the unique structural and electrochemical properties of the layered oxide cathode materials for SIB are *** mechanism of bulk/surface degradation induced by oxygen evolution,phase transition,microcrack,and electrolyte decomposition is thoroughly ***,the interfacial engineering to construct stable interface through various effective methods is fully *** future outlook and challenges for interfacial engineering in this filed are also *** review should shed light on the rational design and construct of robust interface for applications of superior layered oxide cathodes in SIB and may suggest future research directions.

关键词： interfacial engineering sodium-ion battery layered oxide electrolyte interface

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Phase-engineering modulation of Mn-based oxide cathode for constructing super-stable sodium storage

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Journal of Energy Chemistry 2024年第1期88卷 421-427,I0010页

作者： Quanqing Zhao Ruru Wang Ming Gao Bolin Liu Jianfeng Jia haishun Wu Youqi Zhu Chuanbao Cao Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032ShanxiChina Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

The Mn-based oxide cathode with enriched crystal phase structure and component diversity can provide the excellent chemistry structure for Na-ion ***,the broad application prospect is obstructed by the sluggish Na^(+)kinetics and the phase transitions upon ***,we establish the thermodynamically stable phase diagram of various Mn-based oxide composites precisely controlled by sodium content tailoring strategy coupling with co-doping and solid-state *** chemical environment of the P2/P'3 and P2/P3 biphasic composites indicate that the charge compensation mechanism stems from the cooperative contribution of anions and *** from the no phase transition to scavenge the structure strain,P2/P'3 electrode can deliver long cycling stability(capacity retention of 73.8%after 1000 cycles at 10 C)and outstanding rate properties(the discharge capacity of 84.08 mA h g^(-1)at 20 C)than P2/P3 ***,the DFT calculation demonstrates that the introducing novel P'3 phase can significantly regulate the Na^(+)reaction dynamics and modify the local electron configuration of *** effective phase engineering can provide a reference for designing other high-performance electrode materials for Na-ion batteries.

关键词： Sodium ion battery Oxide cathode Phase engineering Phase diagram Na~+kinetic

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基于多层信息融合和显著性特征增强的农作物病害识别

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农业机械学报 2023年第7期54卷 214-222页

作者：杜海顺张春海安文昊周毅张镇郝欣欣河南大学人工智能学院郑州450046 河南省车联网协同技术国际联合实验室郑州450046

现有基于深度学习的农作物病害识别方法对网络浅层、中层、深层特征中包含的判别信息挖掘不够,且提取的农作物病害图像显著性特征大多不足,为了更加有效地提取农作物病害图像中的判别特征,提高农作物病害识别精度,提出一种基于多层信息... 详细信息

现有基于深度学习的农作物病害识别方法对网络浅层、中层、深层特征中包含的判别信息挖掘不够,且提取的农作物病害图像显著性特征大多不足,为了更加有效地提取农作物病害图像中的判别特征,提高农作物病害识别精度,提出一种基于多层信息融合和显著性特征增强的农作物病害识别网络(Crop disease recognition network based on multi-layer information fusion and saliency feature enhancement,MISF-Net)。MISF-Net主要由ConvNext主干网络、多层信息融合模块、显著性特征增强模块组成。其中,ConvNext主干网络主要用于提取农作物病害图像的特征;多层信息融合模块主要用于提取和融合主干网络浅层、中层、深层特征中的判别信息;显著性特征增强模块主要用于增强农作物病害图像中的显著性判别特征。在农作物病害数据集AI challenger 2018及自制数据集RCP-Crops上的实验结果表明,MISF-Net的农作物病害识别准确率分别达到87.84%、95.41%,F1值分别达到87.72%、95.31%。

关键词：农作物病害识别多层信息融合显著性特征神经网络

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