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Industrial Chemistry & Materials 2024年第4期2卷 571-586页

作者： Jiandong Zuo Hongjie Luo Ziye Ling Zhengguo Zhang Xiaoming Fang Weiwei Zhang Key Laboratory of Enhanced Heat Transfer and Energy Conservation The Ministry of EducationSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Guangdong Engineering Technology Research Center of Efficient Heat Storage and Application South China University of TechnologyGuangzhou 510640China Gmerit Holdings Ltd. Foshan 528000China

Due to their limitations in conductivity and shape stability,molten salt phase change materials have encountered obstacles to effectively integrating into electric heating conversion technologies,which are crucial in energy storage and conversion *** this study,we synthesized an inorganic molten salt composite phase change material(CPCM)with enhanced conductivity and shape stability using a gasphase silica adsorption *** findings revealed the regularities in thermal properties modulation by expanded graphite(EG)within CPCM and delved into its characteristics of electric heating *** study elucidated that a conductive network is essentially formed when the EG content exceeds 3 wt%.Following the fabrication of CPCM into electric heating conversion modules,we observed a correlation between the uniformity of module temperature and the quantity of EG,as well as the distribution of electrode resistance and external voltage *** upon this observation,we proposed a strategy to adjust the module temperature field with an electric *** the proposed direct electrical heating energy storage method with traditional indirect electrical heating methods,the energy storage rate increases by 93.8%,with an improved temperature *** research offers valuable insights for the application of molten salt electric heating conversion CPCMs.

关键词： Thermal energy storage materials Inorganic molten salts Composite phase transition materials electrothermal conversion Physical property regulation

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Multifunctional Ti_(3)C_(2)T_(x)-(Fe_(3)O_(4)/polyimide)composite films with Janus structure for outstanding electromagnetic interference shielding and superior visual thermal management

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Nano Research 2022年第6期15卷 5601-5609页

作者： Yali Zhang Zhonglei Ma Kunpeng Ruan Junwei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Flexible multifunctional polymer-based electromagnetic interference(EMI)shielding composite films have important application values in the fields of 5G communication technology,wearable electronic devices and artificial *** this work,Fe_(3)O_(4)/polyamic acid(PAA)nanofiber films are prepared by in-situ polymerization and electrospinning technology,and Ti_(3)C_(2)T_(x)nanosheets are deposited on the surface of the Fe_(3)O_(4)/PAA nanofiber films via vacuum-assisted ***,Janus Ti_(3)C_(2)T_(x)-(Fe_(3)O_(4)/polyimide(PI))composite films are obtained by thermal *** two sides of the Janus films exhibit completely different *** Fe_(3)O_(4)/PI side has excellent hydrophobicity and insulation property,and the Ti_(3)C_(2)T_(x)side has hydrophilicity and terrific *** the mass fraction of Ti_(3)C_(2)T_(x)is 80 wt.%,the Janus Ti_(3)C_(2)T_(x)-(Fe_(3)O_(4)/PI)composite film has excellent EMI shielding performances and mechanical properties,with EMI shielding effectiveness,tensile strength and Young’s modulus reaching 66 dB,114.5 MPa and 5.8 GPa,*** the same time,electromagnetic waves show different absorption shielding effectiveness(SEA)when incident from two sides of the Janus *** the electromagnetic waves are incident from the Fe_(3)O_(4)/PI side,the SEA of the Janus film is 58 dB,much higher than that when the electromagnetic waves are incident from the Ti_(3)C_(2)T_(x)side(39 dB).In addition,the Ti_(3)C_(2)T_(x)side of the Janus Ti_(3)C_(2)T_(x)-(Fe_(3)O_(4)/PI)composite films also has excellent electrothermal and photothermal conversion *** the applied voltage is 4 V,the stable surface temperature reaches 108°C;when it is irradiated by simulated sunlight with power density of 200 mW/cm2,the stable surface temperature reaches 95℃.

关键词： Janus structure Ti_(3)C_(2)T_(x)-(Fe_(3)O_(4)/PI)composite films electromagnetic interference shielding electrothermal conversion photothermal conversion

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Multistimuli Responsive and Thermoregulated Capability of Coaxial Electrospun Membranes with Core-sheath Structure and Functional Polypyrrole Layer

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Chinese Journal of Polymer Science 2022年第11期40卷 1380-1388页

作者： Meng-Hang Gao Wen Feng Xiao-Dong Qi Yong Wang Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science&EngineeringSouthwest Jiaotong UniversityChengdu610031China

Developing thermal management fabrics with good energy storage and multistimuli responsive properties is important for regulating the body temperature in complex ***,the intelligent nonwoven membranes were fabricated via a coaxial electrospinning method,resulting in a core-sheath structure with poly(ethylene glycol)(PEG)as core and polyurethane(PU)as ***,polypyrrole(PPy)with good light absorption ability and electrical conductivity was deposited onto the surface of the PU@PEG electrospun fibers via electrochemical *** PPy layer enabled the membranes to respond quickly to sunlight and electrical *** membranes could heat up to 86°C under simulated sunlight within 200 s or produce remarkable electrothermal effect under a low voltage input of only 1V,exhibiting efficient energy conversion and storage *** photothermal and electrothermal conversion effect could be easily adjusted by controlling the polymerization time of ***,the multifunctional membranes with high latent heat,good mechanical properties as well as excellent photothermal/electrothermal conversion ability are promising in personal thermal management applications.

关键词： Phase change materials Polypyrrole Coaxial electrospinning Photothermal conversion electrothermal conversion

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Integratingmultiple energy storage in 1D–2D bridged array carbon-based phase change materials

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SusMat 2023年第4期3卷 510-521页

作者： Xiao Chen Jianhang Xu Yang Li Yan Gao Ge Wang Institute of Advanced Materials Beijing Normal UniversityBeijingChina Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina

In response to global energy scarcity,frontiers in multifunctional composite phase change materials(PCMs)with photo-/electro-/magnetothermal triggers show great potential in multiple energy ***,most available composite PCM candidates are inadequate for multiple energy storage applications ***,a green synthetic route is proposed to develop bimetallic zeolitic imidazolate framework(ZIF)-derived 1D–2D bridged array carbon-based composite PCMs for simultaneous photo-/electro-/magnetothermal energy storage *** graphitization-induced catalyst,Co nanoparticles greatly boost the formation of ZIF-derived 1D–2D bridged array carbon framework with high graphitization and low interface electrical/thermal *** from the broadband intense photon capture,fast photon/electron/phonon transport,and surface plasma resonance effect of Co nanoparticles,the resulting composite PCMs integrate advanced photo-,electro-,and magnetothermal storage ***,composite PCMs also exhibit long-lasting shape stability,structural stability,thermal storage stability,and photo-/electro-/magnetothermal storage stability after undergoing multiple heating–cooling *** study is promising to accelerate the major breakthroughs of advanced multifunctional carbon-based composite PCMs toward multiple energy utilization.

关键词： electrothermal conversion magnetothermal conversion phase change material photothermal conversion thermal energy storage

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