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Hierarchical Ni-plated melamine sponge and MXene film synergistically supported phase change materials towards integrated shape stability,thermal management and electromagnetic interference shielding

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Journal of Materials Science & Technology 2023年第1期132卷 132-143页

作者： Ziling Cheng guojun chang Bai Xue Lan Xie Qiang Zheng State Key Laboratory of Public Big Data Guizhou UniversityGuiyang 550025China Department of Polymer Materials and Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang 550025China National Engineering Research Center for Compounding and Modification of Polymer Materials National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane ProcessesGuiyang 550014China College of Polymer Science and Engineering Zhejiang UniversityHangzhou 310000China

Along with the integrated and miniaturized development of advanced electronic devices,phase change materials(PCMs)simultaneously with efficient thermal management and high electromag-netic interference(EMI)shielding effectiveness(SE)are ungently ***,the shape-stabilized MXene/Ni-platted melamine sponge/Regenerated cellulose/Graphene nanoplate/Polyethylene glycol(MX/Ni@MS/RCG/PEG)composite PCMs comprising hierarchical Ni@MS/RCG and MXene film were fabricated via a facile encapsulation *** Ni@MS/RCG hybrid aerogel was prepared by electroless plating and sol-gel methods,and MXene film was obtained using vacuum-assisted filtra-tion *** synergistic effect of conductive Ni@MS/RCG networks and tight MXene film endows MX/Ni@MS/RCG/PEG composite PCMs with good shape stability,high cyclic reliability,large latent heat of phase change(154.3 J g^(–1)),excellent thermal conductivity(TC,0.47 W m^(–1)K^(–1))and favorable EMI shield-ing performance(32.7 dB).The TC of acceptable 0.47 W m^(–1)K^(–1)is observed for MX/Ni@MS/RCG-5/PEG at a rather low GNP content of merely 0.39 wt%.In addition,the temperature variation of MX/Ni@MS/RCG-5/PEG is a lot faster than that of pure PEG in the heating/cooling process,revealing the remarkable energy storage and release efficiency for the composite *** investigation has taken an important step to-wards shape-stabilized composite PCMs with both effective thermal management and high EMI SE for promising applications in electronic packaging and advanced energy.

关键词： Phase change material Thermal management Electromagnetic interference shielding Shape stability Encapsulation

High EMI shielding effectiveness and superhydrophobic properties based on step-wise asymmetric structure constructed by one-step method

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Nano Research 2023年第7期16卷 10483-10492页

作者： Kang Yan changmei Wu Lan Xie Lingjun Zeng Yi Jiang Zhiqiang Jiang guojun chang Bai Xue Qiang Zheng Department of Polymer Materials and Engineering College of Materials and MetallurgyGuizhou UniversityGuiyang 550025China State Key Laboratory of Public Big Data Guizhou UniversityGuiyang 550025China National Engineering Research Center for Compounding and Modification of Polymer Materials Guiyang 550014China National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes Guiyang 550014China Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027China

It is of significance to prepare biodegradable electromagnetic interference(EMI)shielding materials with high EMI shielding effectiveness(SE)in order to solve electromagnetic and environmental pollution *** this paper,environmentally friendly EMI shielding silver nanowires(AgNWs)/poly(L-lactic acid)(PLLA)/poly(D-lactic acid)(PDLA)/ferroferric oxide(Fe_(3)O_(4))composites with step-wise asymmetric structures were prepared by a facile one-step non-solvent-induced phase separation *** conductive AgNW network was constructed at a low mass fraction of 5 wt.%on the surface of stereo-complexed crystalline poly(lactic acid)(SC-PLA)film(1.08×10^(4) S/m).Moreover,magnetic Fe_(3)O_(4)is mainly distributed in the skeleton of porous SC-PLA *** to the synergistic effect of AgNWs and Fe_(3)O_(4),the EMI SE of SC-PLA films reaches up to 50.3 ***,SC-PLA film modified with triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane(TTO)demonstrates an outstanding water contact angle of about 150.2°compared with the pure PLLA film(134.7°),stemming from the synergistic effect of denser SC-PLA nano-protrusions and low-surface-energy ***,we successfully fabricated the high EMI shielding SC-PLA film with wonderful superhydrophobicity,which extends the application performance and service life of portable electronics in moist environments.

关键词： phase separation electromagnetic interference super-hydrophobicity Ag nanowire step-wise asymmetric structure

Status and trends in the stability of the three largest ice shelves in Antarctica

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Science China Earth Sciences 2024年第8期67卷 2615-2632页

作者： Rongxing LI guojun LI Lu AN Menglian XIA Da LV Yuan CHENG Aiguo ZHAO Tian chang Xiangbin CUI Shengkai ZHANG Shijie LIU Yixiang TIAN Weian WANG Center for Spatial Information Science and Sustainable Development Applications Tongji UniversityShanghai 200092China College of Surveying and Geo-informatics Tongji UniversityShanghai 200092China Postdoctoral Research Station of Shanghai Surveying and Mapping Institute Shanghai 200063China Key Laboratory of Spatial-temporal Big Data Analysis and Application of Natural Resources in Megacities Shanghai 200063China Institute for Conservation of Cultural Heritage School of Cultural Heritage and Information ManagementShanghai UniversityShanghai 200444China Polar Research Institute of China Shanghai 200136China Chinese Antarctic Center of Surveying and Mapping Wuhan UniversityWuhan 430079China

The Ross,Filchner-Ronne,and Amery ice shelves are the three largest ice shelves in Antarctica,playing a crucial role in supporting the Antarctic ice ***,current studies on the stability of the three largest ice shelves primarily focus on singular or limited factors,lacking a comprehensive assessment of multiple *** systematically and in-depth study the stability and trend of the three largest ice shelves,we comprehensively collected and analyzed key parameters,including elevation changes,basal melting,surface meltwater,major rifts propagation rate,suture zones,ice front area change rate,grounding lines,ice velocity,and mass ***,we selected the collapsed Larsen B Ice Shelf(LBIS),the rapidly changing and structurally weakened Pine Island Ice Shelf(PIIS),and the accelerating Totten Ice Shelf(TIS)as reference ice *** comparing and analyzing the key parameters between these reference ice shelves and the three largest ice shelves,we find the status and trends in the stability of the *** findings reveal that most key parameters of the three largest ice shelves present relatively minor variations compared to those of the reference ice ***,50%of the parameters are smaller than those of the accelerating TIS,88%are smaller than those of the rapidly changing PIIS,and all parameters are smaller than those of the collapsed ***,after analyzing parameters that are not smaller than those of the TIS,it is observed that they remain in a stable ***,the three largest ice shelves are currently undergoing natural changes that do not threaten their stability in the short ***,the evolution of the ice shelves under global climate change remains uncertain,making long-term observation and monitoring essential to assess their impact on sea level rise.

关键词： Three largest ice shelves in Antarctica Key parameters Remote sensing monitoring Ice shelf stability Sea level change

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黄皮洋葱新品种家多宝选育报告

甘肃农业科技 2016年第10期47卷 35-37页

作者：刘锐常国军王天礼甘肃省安达种业有限责任公司甘肃酒泉735000

黄皮洋葱新品种家多宝由甘肃安达种业有限责任公司以自交系MS052为母本、不育系AD0685为父本杂交选育而成。在2014—2015年甘肃省多点区域试验中,折合平均产量为120 000 kg/hm^2,较对照品种牧童增产13.2%。该品种属中晚熟品种,假茎高度9... 详细信息

黄皮洋葱新品种家多宝由甘肃安达种业有限责任公司以自交系MS052为母本、不育系AD0685为父本杂交选育而成。在2014—2015年甘肃省多点区域试验中,折合平均产量为120 000 kg/hm^2,较对照品种牧童增产13.2%。该品种属中晚熟品种,假茎高度90 cm,生长势强,鳞茎圆球型,外皮古铜色,单球质量387.0 g,收口紧,硬度适中,不易脱皮,≥7.0 cm的商品合格率平均是92.8%。高抗霜霉病、紫斑病、软腐病。适宜甘肃河西灌区及类似生态区的洋葱产区种植。

关键词：黄皮洋葱新品种家多宝选育

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紫皮洋葱新品种16071的选育

北方园艺 2020年第24期 178-180页

作者：何丹常国军赵海霞李波王学强于若飞甘肃省酒泉市农业科学研究院甘肃酒泉735000

紫皮洋葱新品种16071由酒泉市农业科学研究院以不育系12-63AR为母本、RAO108为保持系、自交系CHR为父本杂交选育而成。2018—2019年在甘肃省多点试验中,平均产量99 424.5 kg·hm-2,较对照"红美"(91 555.5 kg·hm-2)增产8.6%。该品种属... 详细信息

紫皮洋葱新品种16071由酒泉市农业科学研究院以不育系12-63AR为母本、RAO108为保持系、自交系CHR为父本杂交选育而成。2018—2019年在甘肃省多点试验中,平均产量99 424.5 kg·hm-2,较对照"红美"(91 555.5 kg·hm-2)增产8.6%。该品种属晚熟品种,假茎高度95 cm,生长势强,鳞茎圆球型,外皮紫红色,单球质量293.0 g,收口适中,硬度好,不易脱皮,≥7.0 cm的商品合格率平均为95%。高抗霜霉病、紫斑病、软腐病。适宜甘肃省河西灌区及类似生态区的洋葱产区种植。

关键词：紫皮洋葱新品种 16071 选育

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黄皮洋葱新品种‘创新801’的选育

中国瓜菜 2020年第9期33卷 94-96,I0012页

作者：赵海霞常国军何丹酒泉市农业科学研究院甘肃酒泉735000

‘创新801’是以雄性不育系‘黄皮22号’为母本、‘黄皮16号’为父本杂交选育而成的黄皮洋葱新品种。该品种属长日照一代杂交种,生育期122~128 d,属中晚熟品种。叶鞘淡黄色,叶直立,叶色淡绿色,叶势旺;纵径9.7 cm,横径9.6 cm,鳞茎圆球形... 详细信息

‘创新801’是以雄性不育系‘黄皮22号’为母本、‘黄皮16号’为父本杂交选育而成的黄皮洋葱新品种。该品种属长日照一代杂交种,生育期122~128 d,属中晚熟品种。叶鞘淡黄色,叶直立,叶色淡绿色,叶势旺;纵径9.7 cm,横径9.6 cm,鳞茎圆球形,皮色铜色,3层干皮,收口好,硬度硬,干皮薄,不易脱皮,单球质量367 g,纵、横径≥7.0 cm,合格率95.0%,平均667 m^2产量7963 kg。适宜酒嘉地区及生态条件相类似的地区中、高水肥条件下种植。

关键词：洋葱新品种 ‘创新801’ 雄性不育黄皮

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洋葱高产栽培技术初探

长江蔬菜 2009年第1X期 24-27页

作者：赵强常国军韩文韬荆爱霞梁玉清酒泉市农业科学研究所甘肃酒泉735000

依据洋葱对光、温、水、土、肥的需求规律，在多年日光大棚育苗、田间覆膜移植的基础上，进一步探讨了洋葱最佳育苗时期及最佳搭配品种与产量的关系。初步认为育苗时间提早到12月中旬至翌年1月上旬，品种选用阿波罗或金色巨人更能提高... 详细信息

依据洋葱对光、温、水、土、肥的需求规律，在多年日光大棚育苗、田间覆膜移植的基础上，进一步探讨了洋葱最佳育苗时期及最佳搭配品种与产量的关系。初步认为育苗时间提早到12月中旬至翌年1月上旬，品种选用阿波罗或金色巨人更能提高日光大棚及田间早期有效光、温、水、土、肥的利用率，延长洋葱生长期，每1hm。可提高产量30～45t．是一项行之有效的增产措施，值得示范推广。

关键词：酒泉洋葱日光大棚优良品种超前育苗增产显著

131碘玫瑰红肝胆连续扫描对婴儿黄疸的诊断

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南京医学院学报 1985年第1期 43-46页

作者：常国钧张佩兰马玉琪姚薇萱陈佩华南京医学院第一附属医院核医学科

本文应用131碘-玫瑰红对19例黄疸婴儿作了检查。结果显示:13例胆道闭锁患儿在注射131碘-玫瑰红后24小时仍无肠影出现;5例新生儿肝炎肠道显影;另1例胆道狭窄肠道显影延迟（假阴性）。用本法连续扫描检查方法简便、安全、准确性较高。诊... 详细信息

本文应用131碘-玫瑰红对19例黄疸婴儿作了检查。结果显示:13例胆道闭锁患儿在注射131碘-玫瑰红后24小时仍无肠影出现;5例新生儿肝炎肠道显影;另1例胆道狭窄肠道显影延迟（假阴性）。用本法连续扫描检查方法简便、安全、准确性较高。诊断的关键在于熟悉各种类型黄疸图像的特点以及细致的分析。

关键词：婴儿黄疸 131碘-玫瑰红肝胆放射扫描

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外源褪黑素对碱胁迫下菜豆幼苗的缓解效应

北方园艺 2024年第7期 17-26页

作者：时侦熙苏艺杨晓旭刘大军刘畅冯国军黑龙江大学现代农业与生态环境学院黑龙江哈尔滨150000

以菜豆耐碱品种“粉冠”及相对碱敏感品种“1-4-3-1-1”为试材,采用营养液水培法,设置对照(CK)、外源0.1μmol·L^(-1)褪黑素(MT)、60 mmol·L^(-1)NaHCO_(3)溶液碱胁迫(S)、碱胁迫下添加褪黑素(S+MT)4个处理,研究了外源褪黑素对碱胁迫... 详细信息

以菜豆耐碱品种“粉冠”及相对碱敏感品种“1-4-3-1-1”为试材,采用营养液水培法,设置对照(CK)、外源0.1μmol·L^(-1)褪黑素(MT)、60 mmol·L^(-1)NaHCO_(3)溶液碱胁迫(S)、碱胁迫下添加褪黑素(S+MT)4个处理,研究了外源褪黑素对碱胁迫下菜豆幼苗生长及耐碱性的影响,以期为盐碱地区提高菜豆的耐碱能力提供参考依据。结果表明:褪黑素能够降低碱胁迫对菜豆幼苗生物膜的伤害,增加生物量、超氧化物歧化酶(SOD)活性以及可溶性蛋白质含量,提高叶片的脯氨酸和可溶性糖含量及根系的过氧化物酶(POD)活性;2个菜豆品种对碱胁迫的生理响应不同,“粉冠”的耐碱能力更强,褪黑素能够有效缓解碱胁迫对菜豆幼苗的伤害,而且对相对碱敏感品种“1-4-3-1-1”的缓解效果更好。

关键词：菜豆碱胁迫褪黑素幼苗