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Nano-TiO_(2) coate d nee dle carbon fib er reinforced phenolic aerogel composite with low density, excellent heat-insulating and infrared radiation shielding performance

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Journal of Materials science & technology 2023年第21期152卷 181-189页

作者： Yiwu Pan Xiangyu Jin Hebing Wang He Huang Can Wu Xiaojie Yan Changqing Hong Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China

High-performance thermal protection materials(TPMs)for spacecraft are becoming current research *** polymer-based ablators are considered to be the most promising candidates for TPMs due to their excellent designability and *** this study,a unique nano-TiO_(2) coated needled carbon fiber felt/phenolic resin aerogel composite(TiCF/PR)is *** the anatase nano-TiO_(2) was in-situ coated on the surface of carbon fibers uniformly through the sol-gel and calcination method,then,the phenolic resin aerogel was in-situ synthesized in the nano-TiO_(2) coated needled carbon fiber felt(TiCF)preform through vacuum impregnation and solvothermal *** as-prepared aerogel com-posite possesses a low density(0.30–0.32 g/cm^(3)),low thermal conductivity(0.034 and 0.312 W/(m K)in the z and xy directions),and excellent thermal stability with 13.86%residual weight at 1300℃ in *** is worthwhile to note that the TiCF/PR composite exhibits excellent antioxidant ablation and infrared(IR)radiation shielding properties in a high-temperature heating *** an oxygen-acetylene blaze heating of 1.5 MW/m^(2) for 150 s,the linear ablation rates decreased by 13.4%,and the backside temperature reduced from 322.3 to 179.1℃ compared to that of the sample without nano-TiO_(2) *** experimental and theoretical analysis showed that the present TiCF/PR nanocomposite has competitive and potential application prospects in the field of future TPMs.

关键词： Carbon fiber Opacifier Mechanical properties Thermal properties Ablation performance

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Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via Heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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Nano-Micro Letters 2025年第3期17卷 37-54页

作者： Jinhua Xiong Xu Zhao Zonglin Liu He Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

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Polyarylacetylene as a novel graphitizable precursor for fabricating high-density C/C composite via ultra-high pressure impregnation and carbonization

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Journal of Materials science & technology 2024年第15期182卷 198-209页

作者： Jiaxin Feng Ping Hu Yuan Cheng Yiming Wang Nan Qu Lu Zheng Liancai Xun Chi Zhang Guangdong Zhao Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

High-density carbon/carbon(C/C)composite plays a critical role in the aerospace industry owing to excellent mechanical properties and resistance to ***,traditional manufacturing relies on pitch precursor and hot isostatic pressure impregnation and carbonization(HIPIC)technology,which is time-consuming and *** this study,we report an innovative method utilizing polyarylacetylene(PAA)resin and ultra-high pressure impregnation and carbonization(UHPIC)*** extremely high char yield of PAA resin(85 wt.%)and high isotropic pressure of UHPIC(over 200 MPa)promote the densification of the *** a result,we achieve a high-density(1.90 g/cm^(3))C/C composite with a high degree of graphitization(81%).This composite exhibits impressive properties,including flexural strength of 146 MPa,compressive strength of 187 MPa,and thermal conductivity of 147 W/(m K).When exposed to oxyacetylene flame at 3000 K for 100 s,it displays minimal linear ablation,with a rate of 1.27×10^(-2)mm/*** study demonstrates the exceptional graphitizable characteristic of PAA resin,setting it apart from conventional *** time-saving and cost-effective approach holds significant promise for aerospace applications,particularly in harsh aerodynamic heating environments.

关键词： C/C composite Resistance to ablation Polyarylacetylene Ultra-high pressure impregnation and carbonization Graphitization

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Ultra-fast synthesis and thermodynamic analysis of MoAlB by self-propagating high-temperature combustion synthesis

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Journal of advanced Ceramics 2023年第2期12卷 258-267页

作者： Hang YIN Xiaodong HE Guangping SONG Yongdong YU Yongting ZHENG Yuelei BAI National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Centre for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China

MoAlB as a typical member of MAB phases has attracted much-growing attention due to its unique ***,the low production of MoAlB powders limits its further development and potential *** the present work,the ultra-fast preparation of high-purity MoAlB powders in a few seconds is achieved by self-propagating high-temperature synthesis(SHS)using a raw powder mixture at an atomic ratio of Mo:Al:B=1:1.3:*** reaction mechanism is obtained by analyzing the corresponding composition changes of starting ***,the thermodynamic prediction for the SHS reaction is consistent with the present experiments,where the preparation of MoAlB also conforms to two common self-propagating conditions of the *** enthalpy *** curve shows that the adiabatic temperature of the reaction decreases with the amount of excuse Al increasing but increases when pre-heating the ***,this thermodynamic calculation provides a new idea for the preparation of other MAB phases by the SHS.

关键词： MoAlB MAB phases combustion synthesis thermodynamics self-propagating hightemperature synthesis(SHS)

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Anti-stacking synthesis of MXene-reduced graphene oxide sponges for aqueous zinc-ion hybrid supercapacitor with improved performance

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Journal of Materials science & technology 2023年第23期154卷 22-29页

作者： Zonglin Liu Fuhua Xue Xu Zhao Zhong Chen Haowen Zheng Renjie Ding Pengyang Li Liangliang Xu Jinhua Xiong Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China

Two‑dimensional MXenes with an enormous active surface area are considered to be significant cathode materials for Zn‑ion hybrid supercapacitors. However, the nanosheets are easily self-restacked during the assembly into macroscopic porous electrodes, resulting in a significantly reduced effective surface area, hindering their applications in energy storage. Here, MXenes are subtly distributed on the surface of the sponge in a coral-like structure rather than participating in the assembly of the framework, which has suppressed the self-restacking of MXene effectively, improved the hydrophilicity of the sponge, and provided fast diffusion channels for electrolyte ions. Therefore, the MXene-TiC-reduced graphene oxide sponge exhibits excellent electrical conductivity, an enormous specific surface area with abundant accessible electroactive sites, and superior electrochemical performance. The resulting sponge demonstrates an outstanding specific capacity, up to 501 mAh g–1 at 0.2 A g–1 , with excellent capacity retention (90%) after 3100 cycles as Zinc-ion hybrid supercapacitor cathodes. Furthermore, it exhibits an elegant gravimetric energy density of 486 mWh g–1 at 415 mW g–1 , which has surpassed most leading MXene-based Zn-ion cathodes. This work provides a new synthetic idea for MXene-based macro-composites and paves a new avenue for designing next-generation flexible and portable porous electrodes with high gravimetric and rate performances.

关键词： MXene Porous binder-free electrode Zinc-ion hybrid supercapacitors In-situ synthesis Self-restacking

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Element-based Peridynamics for Heat Conduction Problems of Isotropic and Anisotropic Materials With Crack Propagation

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Journal of Peridynamics and Nonlocal Modeling 2024年第4期6卷 725-772页

作者： Liu, Shuo Liang, Jun Fang, Guodong Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China Science and Technology on Advanced Composites in Special Environment Key Laboratory Harbin Institute of Technology Harbin 150001 China

Element-based peridynamics (EBPD) for transient and steady heat conduction of isotropic and anisotropic materials is proposed, which can conveniently study the thermal transfer problems with cracks. The interactions of EBPD are described using 2-node rod elements for one-dimensional (1D) problems, 3-node triangle elements for two-dimensional (2D) problems and 4-node tetrahedron elements for three-dimensional (3D) problems. An additional rule constructing elements in the EBPD is added to reduce element numbers and delete the low mesh quality elements. The EBPD transient heat conduction equations are derived from the Lagrangian formalism, and the steady heat conduction equations are obtained by the variation principle. The treatments of surface effects, boundary conditions and crack descriptions are provided in detail. The forward difference time increment scheme and Gauss elimination method are used to solve transient and steady heat conduction problems respectively. A series of numerical examples, including 1D, 2D and 3D transient and steady heat conduction problems, are used to validate the proposed EBPD model. The temperature fields of the model with cracks are solved by the proposed method, which has the potential to study thermomechanical and thermal shock problems. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Element-based Heat conduction Nonlocal Peridynamics

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STUDY ON SNPPING-THROUNGH BEHAVIOR OF BISTABLE COMPOSITE LAMINATE ACTUATED BY MFC 23

STUDY ON SNPPING-THROUNGH BEHAVIOR OF BISTABLE COMPOSITE LAM...

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23rd International Conference on Composite Materials, ICCM 2023

作者： Liu, Xiaohui Li, Sipeng Li, Yanqi Dai, Fuhong National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology China

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PIEZOELECTRIC ENERGY CAN BE HARVESTED FROM WIND-INDUCED VIBRATIONS BY UTILIZING A FISHTAIL-LIKE ENERGY HARVESTER 23

PIEZOELECTRIC ENERGY CAN BE HARVESTED FROM WIND-INDUCED VIBR...

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23rd International Conference on Composite Materials, ICCM 2023

作者： Dai, Fuhong Liu, Xiaohui National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology China

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High temperature mechanical and fatigue properties of sol-derived C/Mullite composites

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Ceramics International 2025年第16期51卷 21776-21787页

作者： Zhang, Wei Hong, Sen Ma, Qingsong Zeng, Kuanhong Mao, Weiguo College of Materials Science and Engineering Changsha University of Science & Technology Changsha410114 China Science and Technology on Advanced Ceramic Fibers &Composites Laboratory College of Aerospace Science and Engineering National University of Defense Technology Changsha410073 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150001 China

To reveal the in-situ mechanical properties evolution and failure behavior of C/Mullite composites at high temperature, the in-situ mechanical and fatigue properties of the composites at high temperature were systematically studied in present study. The results suggested that C/Mullite composites presented admirable high temperature mechanical properties in air. The flexural strength of the composites at 1200 °C∼1400 °C was higher than that at room temperature. The composites showed retention of ∼120 % in flexural strength at 1400 °C. The enhanced flexural strength was ascribed to the released thermal stress. The composites showed the fracture toughness of ∼13.5 MPa m1/2 at 1200 °C. Although the fracture toughness of the composites decreased to about 5.6 MPa m1/2 at 1500 °C due to oxidation, the composites exhibited strength retention of ∼94 % at this moment. Furthermore, C/Mullite composites exhibited excellent fatigue performance at 1200 °C in vacuum. The composites was survived after 105 cycles of fatigue loading when the stress level did not exceed 75 %, and there was no decline in in-situ mechanical properties of the composites after 105 cycles of fatigue loading under the stress level of 70 %. The present study further verified the application potential of C/Mullite composites as thermal protection materials. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Thermal fatigue

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Lightweight quasi-layered elastic fibrous porous ceramics with high compressive stress and low thermal conductivity

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Journal of Materials science & technology 2023年第12期143卷 207-215页

作者： Ning Zhou Baosheng Xu Zhiliang Zhou Lijie Qu Yiguang Wang Wenbo Han Daining Fang National Key Laboratory of Science and Technology for National Defense on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

Fibrous porous ceramics are attractive for use as thermal insulation ***,the intrinsic brit-tleness of rigid materials has remained challenging and severely restricts their ***,we demonstrated a facile method for fabricating elastic fibrous porous ceramics(EFPCs)with high com-pressive strength and low thermal conductivity through ordinary press filtration and subsequent heat *** quasi-layered structure and the well-bonded bridging fibers between layers are the key points for the elasticity of *** advanced EFPCs exhibited low density(∼0.126 g cm^(−3)),high com-pressive stress(∼0.356 MPa),and low thermal conductivity(∼0.026 W m^(−1) K^(−1)).Compared with rigid porous fibrous materials,the EFPCs had deformability and excellent shape *** contrast to flexible materials,the EFPCs possessed high compressive stress,thus endowing them with good resistance to *** emergence of this fascinating material may provide new insights for candidate materials in thermal insulation and other fields.

关键词： Silica fiber Facile press filtration Elastic fibrous porous ceramics High compressive stress Thermal insulation

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