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Synthesis and Characterization of Phenyl Camellia oleifera Seed Oil Ester Plasticizing PVC

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Journal of Renewable Materials 2024年第3期12卷 615-628页

作者： wenqing Xiao Yuhang liu Yuxin He Qiaoguang Li Yongquan Li College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and EngineeringGuangzhou510225China College of Chemical Engineering Zhejiang University of TechnologyHangzhou310000China Key Laboratory of Germplasm Platform and Ornamental Plants College of Horticulture and Landscape ArchitectureZhongkai University of Agriculture and EngineeringGuangzhou510225China

Plasticizers are essential additives in the processing of polyvinyl chloride(PVC),with phthalate plasticizers being widely ***,these conventional plasticizers have been shown to be harmful to human health and environmentally unfriendly,necessitating the exploration of eco-friendly bio-based *** this study,Camellia oleifera seed oil,a specialty resource in China,was utilized as a raw material and reacted with 4,4′-Methylenebis(N,N-diglycidylaniline)(AG-80)to synthesize Phenyl Camellia seed Oil Ester(PCSOE).PCSOE was employed as a plasticizer to prepare modified PVC films with varying concentrations,with the conventional plasticizer dioctyl phthalate(DOP)serving as a *** results demonstrate that PSCOE-plasticized PVC films exhibit enhanced hydrophilicity,tensile strength,and thermal stability compared to DOP-modified PVC *** contact angle of PSCOE-plasticized PVC films ranges from 66.26°to 78.48°,which is generally lower than the contact angle of DOP-modified PVC films at 78.40°,indicating improved hydrophilicity due to the modification with *** tensile strength of PSCOE-plasticized PVC films ranges from 17.73 to 20.17 MPa,all surpassing the value of 16.41 MPa for DOP-modified PVC ***,the temperatures corresponding to 5%,10%,and 50%weight loss for PVC samples modified with PCSOE are higher than those for ***,PCSOE presents a viable alternative to DOP as a plasticizer for PVC materials.

关键词： Polyvinyl chloride(PVC) Camellia oleifera seed oil 4,4′-Methylenebis(N,N-diglycidylaniline) bio-based plasticizer

“双碳”目标下大气环境光学监测技术发展机遇

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光学学报 2022年第6期42卷 2-17页

作者：刘文清中国科学院合肥物质科学研究院安徽光学精密机械研究所安徽合肥230031

大气环境污染不仅影响气候变化,还严重威胁人类的生命健康。在“双碳”背景下,温室气体减排和大气污染治理具有显著的协同性,二者同根同源,都涉及大气成分的变化。大气环境问题的解决依赖于环境监测技术的发展。光学监测技术以其强扩展... 详细信息

大气环境污染不仅影响气候变化,还严重威胁人类的生命健康。在“双碳”背景下,温室气体减排和大气污染治理具有显著的协同性,二者同根同源,都涉及大气成分的变化。大气环境问题的解决依赖于环境监测技术的发展。光学监测技术以其强扩展性和非接触、高灵敏、探测目标广的技术特点,在大气环境立体监测领域优势明显,且成为环境监测技术发展的主导方向。目前研究人员已基于卫星平台、地基平台和移动平台发展出了差分吸收光谱技术、激光雷达技术、光腔衰荡光谱技术、傅里叶变换红外光谱技术、可调谐半导体激光吸收光谱技术和气体扩张激光诱导荧光技术等一系列成熟的大气环境光学监测技术。此外,大气环境多平台天空地一体化立体监测技术在减污降碳中发挥了重要作用。推动监测设备的国产化及通过学科交叉融合促进监测技术走向立体化、自动化和智能化应用成为未来大气环境光学的主要发展方向。

关键词：光谱学立体监测减污降碳天空地一体化

Alloy/layer double hydroxide interphasic synergy via nano-heterointerfacing for highly reversible CO_(2)redox reaction in Li-CO_(2)batteries

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Nano Research 2024年第6期17卷 5206-5215页

作者： Tianzhen Jian wenqing Ma Jiagang Hou Jianping Ma Xianhong Li Haiyang Gao Caixia Xu Hong liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China Kyiv College at Qilu University of Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China Shandong Sacred Sun Power Sources Co. Ltd.Qufu 273100China

Li-CO_(2)batteries are among the most intriguing techniques for balancing the carbon cycle,but are challenged by the annoyed thermodynamic barrier of the Li_(2)CO_(3)decomposition ***,we demonstrate the electrocatalytic performances of two-dimensional(2D)CoAl-layer double hydroxide(LDH)nanosheets can be significantly improved by trans-dimensional crosslinking with three-dimensional(3D)multilevel nanoporous(MP)-RuCoAl alloy(MP-RuCoAl alloy⊥CoAl-LDH).The MP-RuCoAl alloy⊥CoAl-LDH with multiscale pore channels and abundant nano-heterointerface is directly prepared by controllable etching Al from a Ru-Co-Al master alloy along with simultaneous partial oxidization of Al and Co *** MP-RuCoAl is composed of various intermetallic compounds and Ru with abundant grain boundaries,and forms numerous heterointerface with 2D CoAl-LDH *** multiscale porous metallic network benefits mass and electron transportation as well as discharge product storage and enables a rich multiphase reaction *** situ differential electrochemical mass spectrometry shows that the mass-to-charge ratio in the charging process is~0.733 which is consistent with the theoretical value of 3/4,stating that the reversible co-decomposition of Li_(2)CO_(3)and C can be achieved with the MP-RuCoAl alloy⊥*** Ketjen black(KB)/MP-RuCoAl⊥CoAl-LDH battery demonstrates a high cyclability for over 2270 h(227 cycles)with a lower voltage gap stabilized at~1.3 V at 200 mA·g^(−1).Our findings here provide useful guidelines for developing high efficiency transition metal based electrocatalysts by coupling with conductive porous substrate for impelling the development of practical Li-CO_(2)battery systems.

关键词： heterojunction interface nanoporous Li-CO_(2)battery dealloying

Application of smog chambers in atmospheric process studies

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National Science Review 2022年第2期9卷 126-141页

作者： Biwu Chu Tianzeng Chen Yongchun liu Qingxin Ma Yujing Mu Yonghong Wang Jinzhu Ma Peng Zhang Jun liu Chunshan liu Huaqiao Gui Renzhi Hu Bo Hu Xinming Wang Yuesi Wang Jianguo liu Pinhua Xie Jianmin Chen Qian liu Jingkun Jiang Junhua Li Kebin He wenqing liu Guibin Jiang Jiming Hao Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing Convenient Environmental Tech Co.Ltd Key Laboratory of Environmental Optics and Technology Anhui Institutes of Optics and Fine Mechanics Chinese Academy of Sciences State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and Engineering Fudan University State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University

Smog chamber experimental systems,which have been widely used in laboratory simulation for studying atmospheric processes,are comprehensively reviewed in this *** components,development history,main research topics and main achievements of smog chambers are *** smog chambers in the world,including their volumes,wall materials,light sources and features,are summarized and *** factors of smog chambers and their influences on the simulation of the atmospheric environment are discussed,including wall loss,wall emission and background *** features of next-generation smog chambers and their application prospect in future studies of the atmospheric environment are also outlined in this paper.

关键词： smog chamber simulation wall effect secondary aerosol ozone

Decoupled knowledge distillation method based on meta-learning

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High-Confidence Computing 2024年第1期4卷 1-6页

作者： wenqing Du Liting Geng Jianxiong liu Zhigang Zhao Chunxiao Wang Jidong Huo Key Laboratory of Computing Power Network and Information Security Ministry of EducationShandong Computer Science Center(National Supercomputer Center in Jinan)Qilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Shandong Provincial Key Laboratory of Computer Networks Shandong Fundamental Research Center for Computer ScienceJinan 250014China Aerospace Science&Industry Network Information Development Co. LTDBeijing 100854China

With the advancement of deep learning techniques,the number of model parameters has been increasing,leading to significant memory consumption and limits in the deployment of such models in real-time *** reduce the number of model parameters and enhance the generalization capability of neural networks,we propose a method called Decoupled MetaDistil,which involves decoupled *** method utilizes meta-learning to guide the teacher model and dynamically adjusts the knowledge transfer strategy based on feedback from the student model,thereby improving the generalization ***,we introduce a decoupled loss method to explicitly transfer positive sample knowledge and explore the potential of negative samples *** experiments demonstrate the effectiveness of our method.

关键词： Model compression Knowledge distillation Meta-learning Decoupled loss

Prospect Analysis of the United States' Crude Oil Exports to the Asia-Pacific Region

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China Oil & Gas 2018年第2期25卷 41-48页

作者： Chen Bo Wang Pei liu wenqing China International United Petroleum & Chemicals Co. Ltd.

At the end of 2015, the United States lifted a 40-year ban on crude oil exports, which has far-reaching implications for the global crude oil market and crude oil trade patterns. Since the release of crude oil exports, with the recovery of crude oil production and improved export infrastructure in the United States, U.S. crude oil exports have been growing rapidly, with an average of about one million barrels/day in 2017, making the U.S one of the major global crude oil exporters. Currently, the AsiaPacific region has replaced North America as the first major destination for U.S. crude oil exports. In light of future trends in the oil refining industry of the Asia-Pacific region, it will usher in a new wave of refinery operations around 2020 and crude oil imports will continue to grow rapidly. The American region, represented by the United States, will replace West Africa as the second largest source of crude oil imports to the Asia-Pacific region, and that energy trade cooperation between the Asia-Pacific region and the United States will continue to grow. In particular, for China, the United States will become an important source of crude oil imports for our country in the future, and the two countries will shift from the past of energy competition to energy cooperation. Sino-US energy trade will play a more active role in economic and trade cooperation between the two countries.

关键词： U.S. crude oil exports Asia-Pacific China Refining capacity Trade pattern Infrastructure Economic efficiency

Free-Standing Multiscale Porous High Entropy NiFeCoZn Alloy as the Highly Active Bifunctional Electrocatalyst for Alkaline Water Splitting

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Chinese Journal of Chemistry 2024年第13期42卷 1465-1473页

作者： Qiuping Zhang Xu Wang Tianzhen Jian wenqing Ma Caixia Xu Qiuxia Zhou Hong liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinanShandong 250022China School of Medical Information and Engineering Southwest Medical UniversityLuzhouSichuan 646000China State Key Laboratory of Crystal Materials Shandong UniversityJinanShandong 250100China

In the endeavor of searching for highly active and stable electrocatalysts toward overall water splitting,high-entropy-alloys have been the intense subjects owing to their advanced physicochemical *** non-noble metal free-standing multiscale porous NiFeCoZn high-entropy-alloy is in situ constructed on the surface layer of NiZn intermetallic and Ni heterojunction over nickel foam(NiFeCoZn/NiZn-Ni/NF)by one scalable dealloying protocal to fulfill the outstanding bifunctional electrocatalytic performances toward overall water *** of the high-entropy effects and specific hierarchical porous architecture,the as-made NiFeCoZn/NiZn-Ni/NF displays high intrinsic catalytic activities and durability toward both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in alkaline *** particular,the in-situ construction of bimodal porous NiFeCoZn high-entropy-alloy results in the small overpotentials(η1000=254/409 mV for HER and OER),low Tafel slopes,and exceptional long-term catalytic durability for 400 ***,the electrolyzer constructed with NiFeCoZn/NiZn-Ni/NF as both cathode and anode exhibits a low cell voltage of 1.72 V to deliver the current density of 500 mA·cm^(–2) for overall water *** work not only provides a facile and scalable protocol for the preparation of self-supporting high-entropy-alloy nanocatalysts but also enlightens the engineering of high performance bifunctional electrocatalysts toward water splitting.

关键词： High-entropy-alloys Bifunctional electrocatalyst Dealloying/Electrocatalysis Oxygen evolution reaction Hydrogen evolution reaction

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退火态超高碳耐磨钢的组织与性能

上海金属 2024年第2期46卷 53-56页

作者：孙梦菊张所全张春风陈静李红斌刘文庆上海大学材料科学与工程学院上海200072 宝山钢铁股份有限公司研究院上海201900

将含1.6%C(质量分数)的超高碳钢在1150℃奥氏体化后进行两次轧制,开轧温度分别为900和750℃,随后炉冷至室温。使用光学显微镜、原子探针层析技术、磨损试验机和拉伸试验等研究了退火态超高碳钢的组织和性能,并与500 HB级耐磨钢进行对比... 详细信息

将含1.6%C(质量分数)的超高碳钢在1150℃奥氏体化后进行两次轧制,开轧温度分别为900和750℃,随后炉冷至室温。使用光学显微镜、原子探针层析技术、磨损试验机和拉伸试验等研究了退火态超高碳钢的组织和性能,并与500 HB级耐磨钢进行对比。结果表明:退火态超高碳钢与500 HB级耐磨钢的耐磨性接近,但前者的硬度较低、断后伸长率较高。退火态超高碳钢组织为铁素体基体和粒状渗碳体,其良好的耐磨性主要源于大量硬质渗碳体颗粒阻碍了磨粒对材料的磨损。

关键词：超高碳钢耐磨性能耐磨机制渗碳体

基于3D霍尔传感器的汽车电子水阀控制器设计

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南方农机 2024年第6期55卷 145-148页

作者：刘文庆冯志坚徐勤佳耿胜民沙覃王林荣扬州华光新材料股份有限公司江苏扬州225002

[目的]满足新能源汽车电子水阀高精度、高可靠性、高集成度的要求。[方法]本研究设计了一种基于3D霍尔传感器的电动汽车水阀控制系统,该系统选用MLX90363霍尔传感器进行位置信号采集,采用基于LIN的电机专用驱动芯片MLX81332进行位置信... 详细信息

[目的]满足新能源汽车电子水阀高精度、高可靠性、高集成度的要求。[方法]本研究设计了一种基于3D霍尔传感器的电动汽车水阀控制系统,该系统选用MLX90363霍尔传感器进行位置信号采集,采用基于LIN的电机专用驱动芯片MLX81332进行位置信号处理与逻辑控制,并设计了包括结构、硬件电路和控制程序等的水阀控制方案。[结果]该系统具有集成度高、成本低、可靠性高以及精度高等优点,可广泛应用于汽车水阀控制系统中。[结论]电动汽车水阀控制系统研究可以保证汽车整车的安全性、节能性以及舒适性,有助于推动汽车产业向智能化、集成化、轻量化的方向快速发展。

关键词： 3D霍尔 MLX90363 水阀汽车热管理 LIN