Polymers
·
2022
·Vol. 14
·期 15
·3032
·
IF 4.967
Zaiming Lin,Yihan Chen,Zhuang Ma,Lihong Gao,Wenhua Chen,Guohua Chen,Chen Ma
Localized heat sources, such as flame guns and high-energy lasers, can cause severe damage to conventional materials. In this study, a novel localized heat-resistant coating with a high in-plane thermal conductivity was designed and prepared. Reduced graphene oxide (rGO) effectively improved the in-plane thermal conductivity of the polyvinyl alcohol (PVA) film, while maintaining the thermal insulation of the resin matrix in the through-plane direction. This characteristic of the rGO/PVA film was combined with the thermal insulation of boron-modified phenolic resin (BPF), and the prepared composite coating with two layers of rGO/PVA films effectively lowered the back-surface temperature in the flame ablation test from 151 to 107 °C. In addition, the area of the ablation-affected region of coating was increased to 103.6 cm2from 31.9 cm2, indicating an excellent heat transfer performance. The layer-by-layer structure could realize the compatibility of high in-plane thermal conductivity and good through-plane thermal insulation. The synergy of these two different characteristics is demonstrated to be the key to improving the localized heat-resistant performance of the composite coating. This study effectively expands the application range of high-conductive film, and the obtained coating could act as a shield against butane flame, high energy lasers, and other localized heat.Keywords:composite coatings;localized heat;reduced graphene oxide;high thermal conductivity
研究领域:
材料科学
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热管理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2023
·Vol. 308
·期 9
·2300036
·
IF 3.9
Bingqing Quan,Mingchao Wang,Xinpeng Hu,Chuanbiao Zhu,Shuang Liu,Hao Wu,Lei Wu,Xiaolong Li,Xin Chen,Xiang Lu,Jinping Qu
The working electronic devices and batteries generate a lot of heat, if this heats not release quickly, it will not only have a great impact on the performance of the devices, but also cause certain safety hazards. The passive thermal management based on organic phase change materials (PCMs) stands out due to its excellent temperature regulation capability as well as the buffer protection capability for device overload. In view of these, a series of flexible EVA/EG@PW (EE@P) phase change composites (PCCs) with high thermal conductivity are prepared by efficiently constructing porous skeletons and thermal conductive pathways through sacrificial template method, and introducing paraffin wax (PW) by simple vacuum impregnation technique. The PCC exhibits high thermal conductivity (2.6 W m −1 K −1 ), high enthalpy (153.5 J g −1 ), and good flexibility. In addition, the PCC possesses excellent cycling stability and thermal stability. In practical application, the PCC shows good temperature control ability for LED and shows great potential application in the field of thermal management.
研究领域:
材料科学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 3
·035306
·
IF 1.62
Jiwan Ding,Ruobing Zheng,Yajie Zhang,Xian Zhang,Gang Liu,Kang Zheng
Silicone rubber (SR) composites filled with silicone rubber particles (SRP) and functionalized h-BN platelets were successfully prepared, which have high thermal conductivities and flexibility. The functionalization of h-BN adopts the combination of non-covalent and covalent modification. The Non-covalent functionalization of poly(dopamine) (PDA), which is deposited on the surface of h-BN platelets, improves the interfacial adhesion for grafting (3-aminopropyl) triethoxy-silan (KH550) by covalent modification (BN-PDA-KH550). To construct the thermal conductive pathway, silicone rubber particles are added. so that the fillers can distribute along the particle circumference by volume exclusion, which is advantageous for improving heat conduction of SR composites. The as-prepared 30 vol% BN-PDA-KH550@silicone rubber particles/silicone rubber composites (m-BN@SRP/SR) exhibited a relatively high thermal conductivity (2.24 W m−1·K−1), which is about 112 times of pure SR (0.20 W m−1·K−1). Besides, the m-BN@SRP/SR composites possessed satisfactory softness and excellent dielectric properties, which presented a broad application prospect in the field of electronic packaging.
研究领域:
材料科学
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热管理技术
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Zhan Sun,Huitao Yu,Can Chen,Mengmeng Qin,Wei Feng
Thermal conductive polymer fibers have broad development prospects because of its excellent thermal and mechanical properties. However, currently reported polymer fibers cannot simultaneously possess high thermal conductivity and high resilience, which greatly limits the application of thermal conductive polymer fibers. Therefore, preparing fibers with high thermal conductivity and high resilience is extremely challenging. The thermoplastic polyurethane/boron nitride liquid metal (TPU/BN-LMs) fiber with core sheath structure is prepared by coaxial wet spinning technology, the boron nitride (BN) doped in thermoplastic polyurethane elastomer (TPU) as sheath and the liquid metal (LMs) as core. The maximum tensile strength of the fiber is 3.9 MPa, and the elongation can reach 400 %. After multiple cycles of stretching, it can return to its original state. In addition, the thermal conductivity of the fiber in the horizontal direction and the vertical direction are 10.0 W m −1 K −1 and 4.6 W m −1 K −1 , respectively. This work solves the current problem of high thermal conductivity and high resilience of thermally conductive polymer fibers that are difficult to be compatible. And it provides a new research idea for the design and preparation of new high thermal conductivity and high resilience polymer fiber materials.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Chip
·
2022
·
IF 0
Sheng-Chang Ding,Jian-Feng Fan,Dong-Yi He,Lin-Feng Cai,Xiang-Liang Zeng,Lin-Lin Ren,Guo-Ping Du,Xiao-Liang Zeng,Rong Sun
The emerging applications of composite gels as thermal interface materials (TIMs) for chip heat dissipation in intelligent vehicle and wearable devices require high thermal conductivity and remarkable damping properties. However, thermal conductivity and damping properties are usually correlated and coupled each other. Here, inspired by Maxwell theory and adhesion mechanism of gecko's setae, we present a strategy to fabricate polydimethylsiloxane-based composite gels integrating high thermal conductivity and remarkable damping properties over a broad frequency and temperature range. The multiple relaxation modes of dangling chains and the dynamic interaction between the dangling chains and aluminum fillers can efficiently dissipate the vibration energy, endowing the composite gels with ultrahigh damping property (tan δ > 0.3) over a broad frequency (0.01 – 100 Hz) and temperature range (–50 – 150 °C), which exceeds typical state-of-the-art damping materials. The dangling chains also comfort to the interfaces between polymer matrix and aluminum via van der Waals interaction, resulting in high thermal conductivity (4.72 ± 0.04 W m –1 K –1 ). Using the polydimethylsiloxane-based composite gel as TIMs, we demonstrate effective heat dissipation in chip operating under vigorous vibrations. We believe that our strategy could be applied to a wide range of composite gels and lead to the development of high-performance composite gels as TIMs for chip heat dissipation.
研究领域:
材料科学
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热管理
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柔性电子器件
✓ 已验证
DOI
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 32
·325702
·
IF 3.874
Xingrong Liu,Wei Wu,Chao Liu,Yi Wang,Qiming Chen,Sufei Cui
This study looked at the process of designing and synthesized expanded graphite (EG) and modifying it with bio-inspired dopamine (DOPA). This is a process used to improve the thermal conductivity and dielectric properties of methyl vinyl silicone rubber (VMQ). The results demonstrated that the EG-DOPA-VMQ composites acquired an exceptional thermal conductivity of 1.015 W mK−1 at the loading of 10 wt%, approximately 480% higher than that of pure silicone rubber (0.175 W mK−1). This enhancement is mainly attributed to the improved dispersion capability of EG-DOPA and the robust interfacial interaction between EG-DOPA-VMQ interfaces; specifically, this is the result when compared with pristine EG. Moreover, throughout this process, the composites maintained an excellent insulating property with a resistance of ≈1012 Ω · cm; this particular result was due to the DOPA deposited on EG surfaces because they acted as an insulating layer, inhibiting the electron transfer in composites. Overall, this work demonstrated that it could present a promising strategy for synchronized manufacturing of polymer composites with high thermal conductivity and insulating capability.
研究领域:
材料科学
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生物仿生学
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 20
·10727-10737
·
IF 11.9
Jiabin Hu,Zhilei Wei,Bangzhi Ge,Lei Zhao,Kang Peng,Zhongqi Shi
Phase-change materials (PCMs) for efficient thermal energy harvesting have promising prospects for thermal energy storage and thermal management. However, the low intrinsic thermal conductivity (TC) of PCMs is a long-standing drawback due to a lack of a thermally conductive network inside them. Herein, a cost-effective route for preparing thermal-conductive phase-change composites by freeze-casting and combustion synthesis to obtain micro-honeycomb aluminum nitride (MH-AlN) reinforcements followed by the impregnation with liquid stearic acid (SA) was presented. The as-prepared MH-AlN/SA composite at 44.46 vol% AlN loading exhibited a high TC of 13.95 W m−1 K−1 parallel to the pore channels, up to 53.49-fold higher compared with that of pure SA. The contact thermal resistance between AlN particles can be greatly lowered via constructing a three-dimensional MH-AlN network inside the SA matrix. Additionally, a typical solar thermoelectric generator was devised and photothermal-electric energy transformation was successfully realized. Real-time recorded maximum output voltage and current were 409.0 mV and 110.8 mA, respectively. The enhancement of the heat transfer gives MH-AlN/SA phase-change composites more application prospects in industrial waste heat utilization and effective solar energy harvesting.
研究领域:
材料科学
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热能存储
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太阳能转换
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Yang Zhang,Jing-Wen Wang,Ying-Jie Ma,Zi-Long Zhang
Thermally conductive polymeric composites with low dielectric constant are highly promising for the packaging materials in the field of modern communication. Therefore, the synergistic improvement of low dielectric constant and high thermal conductivity has become a current research hotspot. In this work, we propose a one-step alkylation of boron nitride nanosheet (BNNS) with ultrasonic stratification using 1-hexanol, and then hot press the films to make Alkyl-BNNSs orient in the fluorinated polyimide (f-PI). The resulting Alkyl-BNNS/f-PI composite successfully realizes the synergistic improvement of thermal property and dielectric properties, exhibiting a high heat conductivity coefficient of 2.36 Wm −1 K −1 with a filler content of 4.99 wt.%. Moreover, the permittivity and dielectric loss of the film are as low as 1.76 and 0.0065 at 1 MHz, respectively. This work provides a facile strategy for breaking the bottleneck of making polyimide composites simultaneously with high thermal conduction and low dielectric performance. Highlights The composite exhibits a high heat-conducting coefficient of 2.36 Wm −1 K −1 . Ultra-low dielectric constant of 1.76 was achieved by the modification of film. Excellent breakdown resistance and flexibility were endowed with the composites.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Si Wu,Xiao Zhang,Haoyuan Sang,Kaiyue Tang,Yihui Tang,Li Chen,Tingxian Li
Phase change materials (PCMs) with high thermal conductivity are highly desired for fast-response thermal management and high-power-density thermal storage. Although graphite/PCM composites have been intensively studied for decades, achieving a high-performance yet low-cost graphite-based phase-change composites (PCCs) remains challenging. In this work, a novel strategy for synthesizing ultrahigh thermal conductivity PCCs is proposed by the low-thermal-resistance and oriented assembly of PCM-filled expanded graphite particles. The alignment of large-size graphite sheets and suppression of the thermal resistance between them are realized inside the PCC blocks by a facile compression-induced assembly and local heating treatment. The resultant PCCs present remarkable thermal conductivity of 8.7–44.7 W m −1 K −1 at graphite contents of 5–17 vol.%, two orders of magnitude higher than that of pure PCM. Besides, the PCC blocks also demonstrate superior overall thermal effusivity and excellent mechanical stability, enabling them to be easily engineered into efficient thermal management devices by coordinating the graphite sheet orientation with the overall thermal transfer direction. Experimental results show an optimized PCC device can lower the peak cooling power by ≈35% through the peak load shifting. The methods presented offers a promising route to preparing high-performance yet cost-effective thermal storage materials for various heat-related applications.
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产品关联
DOI
PubMed
高影响因子
Journal of Thermal Science
·
2025
·
IF 2.6
Zhang Xinyi,Huo Jinghao,Yuan Xiaoyan,Zheng Min,Guo Shouwu
Paraffin (PA) is a common phase change material, which is widely used in battery thermal management systems (BTMS) because of its high latent heat and temperature uniformity, simple system structure, and no increase in battery energy consumption. In this work, sulfur-free expanded graphite (EG) is prepared by oxidation intercalation without H 2 SO 4 in the preparation process, which avoids the harm to devices caused by the S element. The sulfur-free EG exhibits a high expanded volume of 324 mL·g −1 , which can adsorb PA well to prevent leakage. When the mass filling ratio of EG is 5.0%, EG/PA-5.0 composite films show high latent heat of phase transition (253.08 J·g −1 ), and thermal conductivity (2.56 W·m −1 ·K −1 ). EG/PA films are attached to the external surface of the lithium iron phosphate battery for a heat dissipation performance test. When the discharge rate is 1C at room temperature, the surface temperature and maximum temperature difference between temperature measurement points of the battery with EG/PA-5.0 film are 32.1°C and 1.2°C. After charge-discharge at 1C for 100 cycles, the thermal properties of EG/PA remain basically unchanged, and it has good cycle stability. The simulation results are in good agreement with the actual temperature changes of the battery at different discharge rates. This work indicates that sulfur-free EG/PA composite has a good application prospect in BTMS of the power batteries.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhubin Yao,Xiaowei Wu,Yueyu Zeng,Shuyao Li,Tieqiang Fu,Yunjun Luo,Guoqing Zhang,Wensheng Yang,Xinxi Li
Composite phase change materials (CPCMs) with significant amounts of latent heat can absorb and release at a constant transition temperature have attracted much attention in energy storage and electrical vehicles fields. Nevertheless, it is still a great challenge to utilize in battery thermal management system owing to low thermal conductivity and liquid leakage . Although many efforts have endeavored to improve transferring heat capacity, the thermal conductivity of CPCM is still need to explored. Herein, a novel high thermal conductivity and anti-leakage CPCM including polyethylene glycol, nano-Ag particles modified diatomite and expanded graphite (PDAE) has been designed and prepared. And the nano-Ag particles have evenly attached to the surface of diatomite through in-situ chemical reduction reaction and self-assembly technology. The experimental results indicate that PDAE exhibits excellent thermal conductivity with 1.91 W∙m −1 ∙K −1 owing to three-dimensional heat transferring network constructed by nano-Ag particles and expanded graphite. Moreover, it is no shape variation and leakage of PDAE under continuously heated at 60 °C for 2 h. In addition, the temperature performance of battery modules with the different CPCMs have been compared in detail, the results demonstrates that battery module with PDAE can be maintained below 53 °C and the temperature difference is effectively controlled within 5 °C even at 3C discharging rate after 10 cycles. With these prominent performances, this designed CPCM with high thermal conductivity will offer a promising insight into the passive thermal management system in practical application.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 47
·17829-17842
·
IF 4.5
Tan Liming,Zhang Jianbo,Shen Jun
New thermal interface materials (TIM) with liquid metal (LM) as the main component show many advantages in the field of thermal management. However, it is prone to leakage and causes electronic components to fail due to its fluidity, corrosiveness and difficulty in adsorption, thus limiting its applications. In this paper, based on the high thermal conductivity of LM, the composite material made of eutectic gallium indium alloy (EGaIn) and nickel-plated copper mesh (NPCM) was prepared, and the TIM with high thermal conductivity, stability and reliability was obtained. With surface plating, the plating on the copper surface achieves an area coverage of up to 97.7%, effectively preventing EGaIn corrosion. The complete wetting between materials can be achieved through surface modification of NPCM with an EGaIn oxide layer. The surface modification of NPCM with EGaIn oxide layer can achieve complete wetting between materials. The thermal conductivity of the composite is 26.4 W m −1 K −1 . Compared to Nickel foams (NiF), NPCM/EGaIn composite exhibits a 22.4% increase in thermal conductivity. In addition, its thermal conductivity fluctuates in a range below 7 percent even after undergoing high-temperature aging and low-temperature cycling. The actual load test demonstrated that the use of EGaIn/NPCM resulted in an 18.0% reduction in CPU full load temperature and a 78.0% decrease in maximum throttling peak, as compared to conventional silicone grease.
研究领域:
材料科学
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热管理
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功能材料
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电子封装
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纳米科技
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）