Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 8
·1235-1248
·
IF 11.534
Song Limeng,Fan Bingbing,Chen Yongqiang,Gao Qiancheng,Li Zhe,Wang Hailong,Zhang Xinyue,Guan Li,Li Hongxia,Zhang Rui
Multifunctionalization is the development direction of personal thermal energy regulation equipment in the future. However, it is still a huge challenge to effectively integrate multiple functionalities into one material. In this study, a simple thermochemical process was used to prepare a multifunctional SiC nanofiber aerogel spring (SiC NFAS), which exhibited ultralow density (9 mg/cm 3 ), ultralow thermal conductivity (0.029 W/(m·K) at 20 °C), excellent ablation and oxidation resistance, and a stable three-dimensional (3D) structure that composed of a large number of interlacing 3C-SiC nanofibers with diameters of 300–500 nm and lengths in tens to hundreds of microns. Furthermore, the as-prepared SiC NFAS displayed excellent mechanical properties, with a permanent deformation of only 1.3% at 20 °C after 1000 cycles. Remarkably, the SiC NFAS exhibited robust hyperelasticity and cyclic fatigue resistance at both low (∼−196 °C) and high (∼700 °C) temperatures. Due to its exceptional thermal insulation performance, the SiC NFAS can be used for personal thermal energy regulation. The results of the study conclusively show that the SiC NFAS is a multifunctional material and has potential insulation applications in both low- and high-temperature environments.
研究领域:
材料科学
·
纳米技术
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
EcoMat
·
2023
·Vol. 5
·期 11
·e12405
·
IF 14.6
Zhongxuan Wu,Yan Zhan,Shuaiming He,Panpan Yue,Guanghui Song,Jun Rao,Ziwen Lv,Bo Jiang,Baozhong Lü,Gegu Chen,Feng Peng
The commercial plywood is mainly made of high-value wood veneer and formaldehyde-based adhesives, which pose a major risk to human health and environmental protection. Here, we report an all-natural plywood made of self-adhesive bark veneer directly from hardy rubber trees (HRT) via delignification, epoxidation reaction and densification. The resulting bark veneer is demonstrated with sandwich structures featuring natural integration between cellulose and biopolymer Eucommia ulmoides gum (EUG). The intrinsic EUG act as a potential strong “self-adhesive” and water-proofing agent, leading to bark veneer with high hardness, excellent hydrophobicity, wear resistance, and low thermal conductivity. Furthermore, we can produce the self-adhesive plywood on a large scale directly from HRT bark using this approach without any adhesives, endowing it with environmental friendliness, safety in use, and health benefits of human beings. Combining its efficient and low-cost production, the bark veneer shows great promise in fabricating high-performance and environmentally sustainable plywood.
研究领域:
材料科学
·
林业工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Qikuan Cheng,Haotian Sun,Zhaohan Yu,Guangjun Luo,Yuxi Qi,Yi Yuan,Beibei Huang,Yunming Wang,Huamin Zhou
Achieving high performance in flexible thermoelectric materials remains challenging due to the intrinsically conflicting requirements among electrical conductivity, Seebeck coefficient, and thermal conductivity in conventional brittle inorganic thermoelectric materials. Here, we present a hierarchical triple-layer core–shell nanowire architecture based on Ag nanoparticle-decorated Ag 2 Te@Ag@PEDOT:PSS, designed to decouple electron and phonon transport via energy filtering and enhanced phonon scattering. The architecture integrates a conductive Ag 2 Te nanowire core, metallic Ag nanoparticle islands to facilitate carrier transport, and an external PEDOT:PSS shell that serves as an energy filter to suppress low-energy electrons. The hierarchical design achieves an ultralow room-temperature thermal conductivity of 0.407 W m -1 K -1 and a high power factor of 294.53 μW m -1 K −2 , resulting in a record-high ZT value of 0.22 at 300 K, outperforming comparable materials. The fabricated flexible thermoelectric generator (FTEG), when worn on the human body, produces an open-circuit voltage of 1.29 mV, under a temperature difference of 5.6 K between the skin and the environment confirming that the device itself cannot directly drive LEDs. After amplification by a low-power amplification circuit module, it is capable of powering four LEDs, demonstrating its promising potential for self-powered wearable electronics.
研究领域:
材料科学
·
纳米科技
·
热电学
·
柔性电子学
·
能源材料
·
凝聚态物理
✓ 已验证
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 17
·2377
·
IF 4.9
Zhengsong Wu,Yucheng Gao,Shibin Nie,Dongyue Zhao,Xudong Cheng
Cellulose aerogel is a promising thermal insulation material with terrific thermal insulation and environmental friendliness. However, the intrinsic flammability of polysaccharide molecules and dependence on freeze-drying have limited its application in flame-retardant and thermal management systems. Here, we develop a flame-retardant biomass aerogel based on a dual-network matrix of bacterial cellulose and sodium alginate. This innovative material enables high-efficiency and low-cost preparation via ambient pressure drying technology (only ~3.5% volume shrinkage), while achieving flame retardancy by introducing an inorganic nanosheet microstructure within a polymer matrix. The resulting dual-network flame-retardant cellulose aerogel demonstrates thermal performance superior to that of most polymer foams and conventional cellulose aerogels, featuring an ultra-low thermal conductivity of ~0.04 W m −1 K −1 and a high limiting oxygen index (LOI) of ~69%. This research provides a novel strategy for simultaneous flame-retardant modification and energy-efficient manufacturing of biomass-derived aerogels.
研究领域:
材料科学
·
高分子科学
·
火灾安全工程
·
可持续能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Junjie Zheng,Zhen Li,Ning Wei,Mengyue Gao,Tianxiang Bai,Junyan Zhang,Xinhai Zhang,Meifang Zhu,Yanhua Cheng
Aerogels have been considered as super thermal insulators. However, they often exhibit less satisfactory mechanical properties for textile application due to their fragility and poor processability. These problems are overcome through a twisting-induced fibrillation method, using 2D nanofiber membranes as mediators, to process aerogel particles into continuous macroscopic yarns based on a roll-to-roll format. A low concentration of strong nanofiber host in twisted form provides structural support to the aerogel particles and preserves their porous architecture. Despite the high-volume ratio (≈78%) of aerogel particles, the aerogel yarns show high strength, ideal flexibility, and impressive thermal insulation properties. Textiles woven with the aerogel yarns are warmer than cashmere. The aerogel textile is extremely stable under temperatures of −196 and 100 °C, mechanical deformation, and even washing. This technology provides a flexible platform to extend the function (e.g., dyeability, hydrophobicity, and Joule heating) of aerogel yarns and textiles to suit various use scenarios.
研究领域:
材料科学
·
纳米技术
·
纺织工程
·
隔热技术
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Mengyao Li,Changqing Fang,Youliang Cheng,Xin Zhang,Jie Liu,Kun Xiang,Yue zhang
The rapid advancement of infrared detection technologies poses formidable challenges to conventional stealth materials. However, most existing infrared stealth materials rely on a single mechanism-either surface emissivity modulation or thermal conduction blocking-which limits their capacity to deliver durable and stable performance. Herein, a novel vanadium dioxide (VO 2 )/aramid nanofiber (ANF)/polyvinyl alcohol (PVA) aerogel composite was successfully fabricated through a vacuum filtration and freeze-drying process. In this system, ANF and PVA form a robust support framework with exceptional mechanical properties, while VO 2 nanoparticles provide dynamic thermal camouflage properties. The resulting VO 2 /ANF/PVA aerogel exhibited a low density of 0.052 ± 0.002 g/cm 3 , minimal shrinkage rate of 3.5 ± 0.2 %, high porosity of 96.5 ± 0.3 %, substantial compressive stress (0.169 ± 0.001 MPa at 75 % strain), and extremely low thermal conductivity of 0.048 ± 0.003 W/(m·K). Notably, the aerogel demonstrated significant infrared emissivity modulation (from 0.92 to 0.6) across a temperature range of 15–100 °C. As a thermal camouflage coating, it reduced the radiative temperature of a 70 °C object to 17.9 °C while maintaining stable performance for over 2000 s. This study achieved synergistic optimization of material structure and functionality through design of composite structures, offering valuable insights for developing advanced adaptive stealth materials.
研究领域:
材料科学
·
纳米复合材料
·
热功能材料
·
智能响应材料
·
红外探测对抗
·
高分子材料
·
先进涂层技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2022
·
IF 3.407
Debao Liu,Chao Zhang,Yahui Xue
La 2 Zr 2 O 7 ceramic aerogels (LZO CAs) were successfully fabricated via sol-gel method followed by heat treatment process. The morphology, microstructure, and phase composition of the as-prepared samples were systematically studied using various technological means. The results indicated that the as-prepared LZO CAs present a typical three-dimentional (3-D) porous network with a single-phase pyrochlore crystal structure. In addition, the as-prepared LZO CAs presented high specific surface area of 594.85 m 2 /g, low thermal conductivity of 0.033 W/(m·K) at room temperature, and remarkable high temperature heat-insulating property. This work offers a novel strategy for the development of other rare-earth zirconates ceramic aerogels which can be used as high temperature insulations.
研究领域:
材料科学
·
陶瓷
·
热绝缘
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 105
·期 4
·2772-2782
·
IF 3.784
De-bao Liu,Fei-fei Zhou,Li-jie Qu,Yi-guang Wang,Bao-sheng Xu,Shi-gang Ai
Porous La 2 Zr 2 O 7 ceramic aerogels (CAs) were prepared by sol-gel template method and thermal treated process. The microstructure and crystallisation behavior of the samples were systematically characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Raman spectroscopy. The results indicated that the as-prepared porous La 2 Zr 2 O 7 CAs had a single-phase pyrochlore structure with typical three-dimensional (3-D) porous structure. Meanwhile, the formation mechanisms of the as-prepared porous La 2 Zr 2 O 7 CAs were investigated. At the same time, the as-prepared porous La 2 Zr 2 O 7 CAs presented an ultralow room-temperature thermal conductivity of 0.07 W/(m K), high specific surface areas of 325.17 m 2 /g, and a relatively high compressive strength of 11.95 MPa. What's more, the as-prepared porous La 2 Zr 2 O 7 CAs possessed ideal photocatalytic activities due to its high crystallinity, large surface area as well as unique 3-D porous structure. Therefore, the present work is proposing some new insight to prepare rare-earth zirconates CAs with porous structures for thermal insulation and dye degradation applications.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Xinxin Zhang,Xiaota Cheng,Yang Si,Jianyong Yu,Bin Ding
High-performance thermally insulating ceramic materials with robust mechanical properties, high-temperature resistance, and excellent thermal insulation characteristics are highly desirable for thermal management systems under extreme conditions. However, the large-scale application of traditional ceramic granular aerogels is still limited by their brittleness and stiff nature, while ceramic fibrous aerogels often display high thermal conductivity. To meet the above requirements, in this study, ceramic nanofibrous-granular composite aerogels with lamellar multiarch cellular structure and leaf-like fibrous-granular binary networks are designed and fabricated. The resulting composite aerogels possess ultralow weight, superelasticity with recoverable compression strain up to 80%, and large mechanical strength. Furthermore, excellent fatigue resistance with 1.2% plastic deformation after 1000 cyclic compressions, temperature-invariant dynamic mechanical stability from −100 to 500 °C, and an operational temperature range from −196 to 1100 °C are successfully achieved in the proposed composites. The nanosized silica granular aerogels are assembled into a leaf-like shape and wrapped around the fibrous cell walls, endowing low thermal conductivity (0.024 W m–1 K–1) as well as favorable high-temperature thermal superinsulation properties. Benefiting from the favorable compatibility, the present strategy for nanofiber-granular composite ceramic aerogels provides a dominant route to produce thermally insulated and mechanically robust composite cellular materials for use in harsh environments.
研究领域:
材料科学
·
热工工程
·
纳米技术
·
陶瓷与复合材料
·
机械工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhanfeng Li,Xibin Yi,Jia Liu,Luyi Zhu,Ruixiang Liu,Benxue Liu
The configurations of the embedded fibers within aerogel composites influence the mechanical and thermal performances significantly, rendering the composites suitable for harsh conditions. With this regard, quartz fiber preforms were designed by carding quartz fibers wool, then layer-by-layer stacking in a space-confined mold, where the fibers were pre-compressed, resulting in spring-back behavior that opposes the direction of compression. ZrO 2 -SiO 2 aerogel precursor was infiltrated into the fiber preform to form quartz fiber reinforced ZrO 2 -SiO 2 aerogel (QFZSA) composites with the assistance of vacuum impregnation, sol-gel chemistry and supercritical drying. Thanks to the spring back effect of the fiber preform, the QFZSA composite exhibits exceptional out-plane mechanical strengths; compressive and bending strengths both reached nearly 1 MPa. In addition, the layer stacking structure of the fiber preforms efficiently suppressed conductive heat transfer as well as radiative heat transfer, endowing ultra-low thermal conductivities of 0.036 W m -1 K -1 and 0.070 W m -1 K -1 at 1000 ºC and 1200 ºC, respectively. The densities of the QFZSA composites with varying fiber volume fractions were in the range of 0.16-0.24 g cm -3 . X-ray computed tomography provided comprehensive characterization of the QFZSA composites, including fiber configuration, fiber volume fraction, interfacial area, and defect volume fraction, among others, which are important parameters governing composite properties. The as-prepared QFZSA composites are capable of finding applications in many leading-edge thermal protection fields.
研究领域:
材料科学
·
航空工程
·
热工学
·
复合材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·451
·
IF 21.8
Chen Yanan,Ge Sijia,Li Hong,Liu Ling,Hu Xueyan,Hu Peiying,Wu Xiaodong,Cui Sheng,Wang Jin
Aramid nanofiber (ANF) aerogels possess excellent flexibility and favorable mechanical properties. However, their limited infrared transmittance, relatively high thermal conductivity, and low flame retardancy significantly restrict their application in passive thermal management. In this study, a microphase separation strategy is employed to fabricate ANF@Al 2 O 3 composite aerogels, enabling a structural transition from a uniform-pore to a slit-pore morphology. Benefiting from the light regulation by the slit pore structure and the flame-retardant effect of Al 2 O 3 , the prepared ANF@Al 2 O 3 aerogels material have ultra-low thermal conductivity (as low as 30 mW/(m·K)), high infrared transmittance (near-infrared transmittance > 90%), and excellent fire resistance (enhanced combustion endurance), which is able to meet the various needs of passive heating in intelligent buildings. Under outdoor solar irradiation (29.3 °C, 677.6 W/m 2 ), the ANF@Al 2 O 3 composite aerogel achieves an internal temperature of 50.46 °C, achieving a relative heating enhancement of 72.22%. This study provides a strategy for designing high-performance composite aramid aerogels and holds great promise for mild thermal insulation applications with potential relevance to aerospace, energy-efficient buildings, and smart thermal management systems. Graphical
研究领域:
材料科学
·
热管理
·
纳米复合材料
·
节能建筑
·
航空航天材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Debao Liu,Zhiliang Zhou,Yiguang Wang,Baosheng Xu
The high-entropy rare earth zirconate (La 1/5 Nd 1/5 Sm 1/5 Gd 1/5 Yb 1/5 ) 2 Zr 2 O 7 porous ceramics ((5RE 1/5 ) 2 Zr 2 O 7 PCs) were prepared using a foam-gel casting-freeze drying method combined with segmented calcination process. The results of SEM, TEM , and XRD analyses of the (5RE 1/5 ) 2 Zr 2 O 7 PCs indicated the formation of a defective fluorite crystal structure, with the rare earth elements homogeneously distributed. Meanwhile, the as-prepared (5RE 1/5 ) 2 Zr 2 O 7 PCs exhibited high porosity, low bulk density, low thermal conductivity , and relatively high compressive strength . Moreover, the high-temperature thermal conductivity of the samples was evaluated, and the results showed that the (5RE 1/5 ) 2 Zr 2 O 7 PCs maintain a thermal conductivity of 0.150 ± 0.002 W m −1 K −1 even at 1000 °C. The strategy used in this paper can be extended to the synthesis of other high-entropy porous ceramics with high porosity and low thermal conductivity, which is suitable for applications as thermal insulation materials.
研究领域:
材料科学
·
陶瓷
·
热工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）