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A Thermochromic, Viscoelastic Nacre-like Nanocomposite for the Smart Thermal Management of Planar Electronics

Nano-Micro Letters 2023年第10期15卷 182-196页

作者： Jiemin Wang Tairan Yang zequn Wang Xuhui Sun Meng An Dan liu Changsheng Zhao Gang Zhang Weiwei Lei College of Biomedical Engineering Sichuan UniversityChengdu 610064People’s Republic of China Institute for Frontier Materials Deakin UniversityWaurn Ponds CampusLocked Bag 20000GeelongVictoria 3220Australia College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi’an 710021People’s Republic of China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065People’s Republic of China Institute of High Performance Computing A*STAR Singapore 138632Singapore

Cutting-edge heat spreaders for soft and planar electronics require not only high thermal conductivity and a certain degree of flexibility but also remarkable self-adhesion without thermal interface materials, elasticity, arbitrary elongation along with soft devices, and smart properties involving thermal self-healing, thermochromism and so on. Nacre-like composites with excellent in-plane heat dissipation are ideal as heat spreaders for thin and planar electronics. However, the intrinsically poor viscoelasticity, i.e., adhesion and elasticity, prevents them from simultaneous self-adhesion and arbitrary elongation along with current flexible devices as well as incurring high interfacial thermal impedance. In this paper, we propose a soft thermochromic composite(STC) membrane with a layered structure, considerable stretchability, high in-plane thermal conductivity(~30 Wm^(-1) K^(-1)), low thermal contact resistance(~12 mm^2 KW^(-1), 4–5 times lower than that of silver paste), strong yet sustainable adhesion forces(~4607 Jm^(-2), 2220 Jm^(-2) greater than that of epoxy paste) and self-healing efficiency. As a self-adhesive heat spreader, it implements efficient cooling of various soft electronics with a temperature drop of 20℃ than the polyimide case. In addition to its self-healing function, the chameleon-like behavior of STC facilitates temperature monitoring by the naked eye, hence enabling smart thermal management.

关键词： Boron nitride nanosheets Nacre-inspired composites Viscoelastic Thermochromic Smart thermal management

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Nucleation and growth mechanism of cefodizime sodium at different solvent compositions

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Frontiers of Chemical Science and Engineering 2013年第4期7卷 490-495页

作者： Xinwei ZHANG Shudong ZHANG Xiaodan SUN zequn YIN Quanjie liu Xiwen ZHANG Qiuxiang YIN Fushun Research Institute of Petroleum and Petrochemicals SINOPEC Fushun 113001 China School of Chemical Engineering and Technology State Key Laboratory of Chemical Engineering Tianjin University Tianjin 300072 China

The induction time of cefodizime sodium was measured in ethanol-water at different solvent composi- tions by the laser technology measurement. The results indicate that the solvent composition played an important role in the supersaturation and the nucleation process of cefodizime sodium solution. According to the modified classical nucleation theory, the nucleation and growth mechanism were identified. The correlation results show that heterogeneous nucleation dominated the nucleation process at lower supersaturation, where homogeneous nucleation is the most important mechanism at higher supersaturation. Based on the correlated results, the 2D mediated growth mechanism had the highest correlation coefficients （R2）, so this mechanism was selected as the proper growth mechanism for cefodizime sodium.

关键词： cefodizime sodium induction time primarynucleation growth mechanism

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Effects of nanoscale Sn segregation on corrosion behavior of laser powder bed fusion Cu-15Ni-8Sn alloy

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Journal of Materials Science & Technology 2023年第27期158卷 96-110页

作者： Pengcheng Zuo zequn Zhang Xiaohong Qi Zhuangzhuang liu Jiuyang Xia Junshen Wu Xiaogang Li Bowei Zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China

Corrosion resistance of laser powder bed fusion(LPBF)Cu-15Ni-8Sn alloys is crucial towards its practical application in marine *** this work,corrosion behavior of LPBF Cu-15Ni-8Sn alloy was com-prehensively *** results suggest that LPBF Cu-15Ni-8Sn alloy exhibits superior corrosion re-sistance than the conventional casting counterpart and their corrosion behavior is highly associated with Sn ***,a triple-layer film will be formed on the surface of LPBF Cu-15Ni-8Sn alloy when being exposed to 3.5 wt%NaCl *** be more detailed,the abundance of nanoscale Sn-rich precipitates at the molten pool boundaries promotes the initial formation of a thick inner layer,where Ni and Sn tend to be distributed at inner and outer positions of the layer,*** contrast,the inner layer on molten pools is much thinner ascribed to a lower Sn content,facilitating the earlier nucleation and growth of a compact middle layer that is mainly composed of numerous Cu-rich *** the outmost position,CuO,Cu(OH)_(2) and Ni(OH)_(2) constitute the major composition of the loose *** results of this study could contribute to the optimal design and processing of additively manufactured Cu-Ni-Sn alloys.

关键词： Laser Powder Bed Fusion(LPBF) Cu-15Ni-8Sn alloy Sn segregation Localized corrosion Oxide film

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白云鄂博国家矿山公园矿业遗迹资源评价

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中国国土资源经济 2018年第8期31卷 54-58页

作者：刘泽群王德利曹士赏冀学松寇婷北京市地质矿产勘查开发总公司北京100050

文章对白云鄂博国家矿山公园的主要矿业遗迹资源进行分类介绍,并按照定性评价结合定量评价的方法对各个主要遗迹点(群)进行评分定级。主要结论:园区内矿业遗迹具有稀有性、典型性、丰富性和科学性特征,且保存完好,体系完整,有较高的历... 详细信息

文章对白云鄂博国家矿山公园的主要矿业遗迹资源进行分类介绍,并按照定性评价结合定量评价的方法对各个主要遗迹点(群)进行评分定级。主要结论:园区内矿业遗迹具有稀有性、典型性、丰富性和科学性特征,且保存完好,体系完整,有较高的历史文化价值,具有重大的开发利用价值,可供游览观赏和作为我国及世界科学考察的基地。

关键词：矿业遗迹白云鄂博国家矿山公园矿业遗迹评价

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4,5-二氨基-2-硫脲嘧啶膜氯化钠溶液中对铜缓蚀性能的研究（英文）

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上海师范大学学报（自然科学版） 2019年第2期48卷 165-177页

作者：刘泽群范娟娟姜月月周洋应叶郭小玉杨海峰上海师范大学化学与材料科学学院教育部资源化学重点实验室上海200234

通过自组装方法将4,5-二氨基-2-硫脲嘧啶(MPD)分子吸附在铜(Cu)表面,应用电化学极化、电化学阻抗谱(EIS)和拉曼光谱方法,研究其在质量分数为3.5%的氯化钠(NaCl)溶液中的缓蚀能力.在最佳装配条件下,MPD膜的最大缓蚀效率达到98.1%.拉曼光... 详细信息

通过自组装方法将4,5-二氨基-2-硫脲嘧啶(MPD)分子吸附在铜(Cu)表面,应用电化学极化、电化学阻抗谱(EIS)和拉曼光谱方法,研究其在质量分数为3.5%的氯化钠(NaCl)溶液中的缓蚀能力.在最佳装配条件下,MPD膜的最大缓蚀效率达到98.1%.拉曼光谱研究表明:MPD分子通过N_9-H_(10)和S_7-H_8吸附在Cu表面上.

关键词：铜缓蚀电化学阻抗谱(EIS) 极化曲线拉曼光谱

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特色小镇规划建设中的地质工作

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城市地质 2017年第3期12卷 14-18页

作者：王德利付刚寇婷李玉倩刘泽群农冬灵北京市地质矿产勘查开发总公司北京100050

特色小镇建设从概念提出到全面展开,其全新的理念迅速引起各方关注与轰动,成为我国新型城镇化和美丽乡村建设的引擎,将迎来大发展阶段。在特色小镇的决策论证和规划建设中,普遍关注小镇的产业导入,重点放在企业与小镇的资本对接上,对地... 详细信息

特色小镇建设从概念提出到全面展开,其全新的理念迅速引起各方关注与轰动,成为我国新型城镇化和美丽乡村建设的引擎,将迎来大发展阶段。在特色小镇的决策论证和规划建设中,普遍关注小镇的产业导入,重点放在企业与小镇的资本对接上,对地质资源地质环境安全保障的重要性则普遍认识不足,也没有把地质工作当成特色小镇决策论证和规划建设中必要的专项工作来设定。特色小镇决策阶段的地质工作主要是区域性的概略地质调查工作,概略性汇总分析各类信息数据;规划阶段的地质工作,以精细化地质调查为主题,内容有详细的地质环境调查与治理,详细的地质资源调查;建设和运营阶段的地质工作主要是开发地质资源,为培育特色产业服务。特色小镇规划建设前期,必须超前部署专项地质工作。同时,地质工作也需要创新工作理念和工作方式。

关键词：特色小镇地质工作规划建设

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Build in seconds:Small-molecule hydrogels of self-assembled tryptophan derivatives

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Chinese Chemical Letters 2023年第8期34卷 219-222页

作者： Xianwen Song Jun Zheng Shunmei He Yilin liu Shutong Yang Qiang Li Chuntai liu zequn Zhang Xi liu Chunyan Deng Yi Zhang Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Lab of ColloidInterface and Chemical Thermodynamics Institute of ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China Department of Gastrointestinal Surgery The Third Xiangya Hospital of Central South UniversityChangsha 410013China

Small-molecule hydrogels based on amino acid derivatives have promising applications in many biological fields,including cell culture,drug delivery,and tissue *** these hydrogels have been widely reported to have low cytotoxicity,biocompatibility,and tunable bioactivity,problems such as harsh preparation conditions and complex material design hinder their ***,by adjusting pH to induce non-covalent interactions between small-molecule tryptophan derivatives(N-[(phenylmethoxy)carbonyl]-L-tryptophan,Mw:338.35),we developed a self-assembled three-dimensional network hydrogel that can be rapidly formed in *** the supramolecular self-assembly mechanism of the hydrogels was also investigated in detail through experimental characterizations and density functional theory ***-prepared hydrogels also exhibit reversible pH-stimulated response and self-healing *** study details a research process for the simple and rapid preparation of tryptophan derivative-based hydrogels,which provides more reference ideas for the future development of materials based on other amino acid derivatives.

关键词： Small-molecule Hydrogel Tryptophan derivatives Self-assemble Self-healing Density functional theory

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功能化多壁碳纳米管增强涂层用于金属保护

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上海师范大学学报（自然科学版） 2021年第5期50卷 517-527页

作者：姜月月李守婷范娟娟刘泽群郭小玉应叶杨海峰上海师范大学化学与材料科学学院上海200234

通过多巴胺自发氧化聚合形成包裹的多壁碳纳米管(PDA@FMWCNT).利用聚多巴胺(PDA)的易附着能力,在铜(Cu)表面构造了基于PDA@FMWCNT的复合材料薄膜.利用拉曼(Raman)光谱、傅里叶变换红外光谱(FT-IR)、X射线光电子光谱(XPS)和扫描电子显微... 详细信息

通过多巴胺自发氧化聚合形成包裹的多壁碳纳米管(PDA@FMWCNT).利用聚多巴胺(PDA)的易附着能力,在铜(Cu)表面构造了基于PDA@FMWCNT的复合材料薄膜.利用拉曼(Raman)光谱、傅里叶变换红外光谱(FT-IR)、X射线光电子光谱(XPS)和扫描电子显微镜(SEM)对复合材料的结构进行了表征.利用电动位极化和电化学阻抗谱(EIS)法评价了PDA@FMWCNT在盐溶液中对金属的腐蚀保护性能.结果表明,PDA@FMWCNT复合涂层具有良好的防腐蚀性,并详细描述了其保护机理.

关键词：聚多巴胺(PDA) 多壁碳纳米管(MWCNT) 腐蚀防护复合薄膜

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Self-assembled interlayer aiming at the stability of NiOx based perovskite solar cells

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Journal of Energy Chemistry 2022年第6期31卷 211-220,I0006页

作者： Tonghui Guo Zhi Fang zequn Zhang Zhiqiang Deng Rui Zhao Jing Zhang Minghui Shang Xiaohui liu Ziyang Hu Yuejin Zhu Liyuan Han Department of Microelectronic Science and Engineering Ningbo UniversityNingbo 315211ZhejiangChina School of Materials Science and Engineering Ningbo University of TechnologyNingbo 315016ZhejiangChina State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Inorganic NiO_(x) based inverted structure perovskite solar cells (PSCs) is reported to be more stable than that with the organic hole transport *** this work,NiO_(x)/MAPbI_(3) interface chemical reaction induced instability of perovskite is unveiled:Ni^(3+) and I^(-) exhibit redox reactions and deprotonation of MA^(+) happens,which result in interface defects and perovskite lattice *** the defective interface accelerates the degradation of perovskite by defect pathways from the bottom interface to the perovskite surface contacting H_(2)O/O_(2).Self-assembled interlayer of NH_(2)^(-)end silane on NiO_(x)separates the reactive NiO_(x)and MAPbI_(3),tunes the interface energy states by–NH_(2) end *** a result,the PSC based on the silane treated NiO_(x)achieves enhanced PCE of 20.1%with decent stability under environmental and extreme conditions (high temperature,high humidity,light infiltration).Our work highlights the interface chemical problem induced PSC instability and a simple interface modification to achieve the stable PSCs.

关键词： Perovskite solar cells Interface chemical problem NiOx hole transport material Self assemble Stability

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山东省烟台市牟平区宋家沟金矿区内莱阳群林寺山组砾岩碎屑锆石U-Pb年龄地质意义

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山东国土资源 2018年第3期34卷 8-14页

作者：杨庆祝德成张海瑞吕大炜刘泽群许庆林沈晓丽薄军委山东科技大学地球科学与工程学院山东青岛266590 山东省地质调查院山东济南250013 山东省第四地质矿产勘查院山东潍坊261021 山东省第三地质矿产勘查院山东烟台264000

山东省烟台市宋家沟牟平区金矿区内发育有莱阳群林寺山组砾岩,该组砾岩分选性较差,既有近椭圆磨圆度极高砾石,也有棱角分明无磨圆砾石,反映了砾岩源区复杂的特点。该文对砾岩内碎屑锆石U-Pb年龄段的分析得到碎屑锆石年龄分别落入640~770... 详细信息

山东省烟台市宋家沟牟平区金矿区内发育有莱阳群林寺山组砾岩,该组砾岩分选性较差,既有近椭圆磨圆度极高砾石,也有棱角分明无磨圆砾石,反映了砾岩源区复杂的特点。该文对砾岩内碎屑锆石U-Pb年龄段的分析得到碎屑锆石年龄分别落入640~770Ma,540~570Ma和(228±4)Ma,通过对这些年龄时段的分析,新元古代活动大陆边缘事件的花岗质片麻岩、震旦纪时代的岩体、柳林庄序列喷出岩都可能是其母岩。根据研究区内此类岩石的出露情况分析得到其近源与远距离搬运沉积两种结果,并与前人研究相对比,得到该组砾岩物源区为苏鲁造山带,说明在胶莱盆地形成之初,东北缘的物源区就以苏鲁造山带为主。该认识对于研究胶东地区的造山带不同时期地质事件具有重要意义。

关键词：莱阳群林寺山组砾岩锆石U-Pb定年胶莱盆地山东烟台

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