APPLIED THERMAL ENGINEERING
·
2014
·
IF 2.624
Yuan-Xiang Fu,Zhuo-Xian He,Dong-Chuan Mo,Shu-Shen Lu
Heat dissipation is an important issue for electronic devices. In the present work, we prepared eight kinds of thermal adhesives by filling the epoxy resin with natural graphite, copper, aluminum , zinc oxide , boron nitride , aluminum oxide, diamond and silver powders, and measured the thermal conductivity of all samples. The results show the eight fillers can efficiently improve the thermal conductivity of the epoxy resin. Meanwhile, we found the layer-shape filler is more favorable than the ball-shape filler and the sharp-corner-shape filler to enhance the thermal conductivity of epoxy resin, and the low price layer-shape natural graphite-epoxy adhesive had the highest thermal conductivity up to 1.68 W m −1 K −1 at weight 44.3% of the eight thermal adhesives. All the fillers and the cross sections of thermal adhesives morphologies images were characterized by scanning electron microscopy, and the thermal conductivities of all the samples were measured by Hot Disk TPS-2500 thermal constants analyzer.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2024
·
IF 6.1
Yijun Zhong,Xibo He,Wei Wang,Yawei Xu,Yuxiang Wang,Yong Shuai
Phase change materials (PCM) have emerged as an effective thermal management solution for addressing the heat dissipation challenges in electronic devices, particularly those with high heat flux and prolonged thermal shock duration. However, their commercial application has been hindered by issues such as low thermal conductivity, leakage, and assembly challenges. This paper introduces composite PCM (CPCM) that offer excellent thermal conductivity, flexibility, and stable shape, developed through a process of physical mixing and thermo-compression formation, and evaluates their performance in chip heat dissipation experiments. An olefin block copolymer (OBC) is used as a supporting material to encapsulate 1-hexadecanol (HD), effectively preventing melt leakage while providing thermal flexibility. Graphite is added to create interconnected heat transfer channels within the CPCM. The CPCM with 7.5 wt% expanded graphite (EG) and an HD/OBC mass ratio of 12:8 demonstrates optimal performance, achieving a thermal conductivity of 0.537 W∙m −1 ∙K −1 , a phase transition enthalpy of 152J∙g −1 , and a leakage rate of only 0.846 % after 200 thermal cycles. In simulated electronic chip heat dissipation experiments, the CPCM effectively stores and dissipates heat, maintaining the electronic device within a stable and reasonable operating temperature range, thereby proving its effectiveness in the thermal management of electronic devices. The composite is easy to process, exhibits excellent performance, and holds significant potential for widespread application in the temperature control of electronic devices.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Hailong Liu,Furong Tao,Hairui Ji,Hailong Zhang,Libin Liu
Developing the coating with superior waterproofing and heat dissipation abilities can prevent electronics from contamination and heat damage. However, most of these coatings show poor transparency and antifouling ability. In this study, a multifunctional ultra-slippery transparent coating (STC) has been developed by simply spraying suspensions consisting of poly(perfluorodecyl acrylate-co-isobornyl acrylate) followed by the curing treatment at room temperature. The thickness of the coating is only 1.5 μm measured by scanning electron microscope. A high transparency of 90 % is observed by UV–vis–NIR. X-ray photoelectron spectroscopy and fourier transform infrared spectroscopy demonstrate successful formation of STC and explain low surface energy. The slippery surface makes the rapid sliding of water and oil droplets when tilted at only 8°. The surface of the coating can be cleaned by water and oil-based liquids due to its excellent slippery property. In addition, the heat dissipation of electronic devices was improved after coating STC. High transparency makes it easier to observe the working condition of precision equipment. Also, the STC protects the electronic components from short circuit destroying during for underwater operation. Therefore, the prepared STC shows great promise for various electronic devices due to its easy fabrication and versatile performance.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jingkai Liu,Haoyang Feng,Jinyue Dai,Kerong Yang,Guangmeng Chen,Shuaipeng Wang,Dandan Jin,Xiaoqing Liu
Thermal interface materials (TIMs) with excellent heat dissipation capacity are highly desired for the development of miniaturized, integrated, and dense electronic devices. In addition, with the increasing accumulation of e-waste, the recyclability of TIMs has also become an urgent concern. Herein, a fully recyclable TIM with high thermal conductivity and conformability to the rough surface was prepared based on the synthesized epoxy vitrimer and boron nitride (BN) nanosheet. Results revealed that only by simple hot-pressing, the filled BN could be easily oriented in the plane and led to a thermal conductivity of 3.85 W m −1 K −1 with the BN content of 40 wt%, which was 30 times higher than that of the pristine epoxy resin and 4.3 times higher than the composite before hot-pressing treatment. The electronic device made of the prepared composite exhibited a 20 °C lower core temperature than the commercial silicone material, due to the superior thermal conduction and mechanical compliance. Moreover, benefiting from the multistage degradation mechanism of the synthesized epoxy vitrimer, the fabricated composite could be efficiently chemically recovered under mild conditions, demonstrating the BN recovery rate of 96.2% and other organic raw materials recovery rate of 73.6% to 82.4%. This work provides us with a new strategy for the design of recyclable and high-performance TIMs.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 72
·42335-42342
·
IF 3.049
Bo Huang,Xinxin Luo,Qichao Zou,Suxiao Wang,Jinzhi Zhang
We reported an innovative transparent, elastic and flexible conductive composite materials P(SSNa-BA-St)/PEDOT/graphene which were prepared by using P(SSNa-BA-St) latex as template for PEDOT polymerization and graphene doping. This P(SSNa-BA-St)/PEDOT/graphene film exhibited highly transparent, good water resistance, low moisture adsorption, highly elastic and highly conductive properties, which can serve as a practical approach to fabricate the flexible, conductive and transparent films for wearable and implantable electronic devices, and photovoltaic cells.
研究领域:
材料科学
·
纳米技术
·
电气工程
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 10
·1-9
·
IF 2.983
Zhang Yawen,Ding Huizhen,Yan Bin,Lin Pei,Wu Di,Shi Zhifeng,Chen Xu,Tian Yongtao,Li Xinjian
Recently, highly flexible strain sensors have been widely studied based on the conductive polymer composites, due to their potential applications in wearable electronics, soft robots, and human–machine interfaces. Herein, we fabricate the flexible MWCNT line/Ecoflex strain sensors by 3D printing technology to investigate the effects of preparation conditions on the performance of sensors, and find that gage factor (GF) of such sensors is effected by concentration of MWCNT/IPA solution and curing time of Ecoflex pre-polymer film. Among the obtained samples, the sensor prepared by 2 wt% MWCNT/IPA solution with curing time of 12 min has the highest gage factor, about ~ 23.87. The sensors can detect or monitor subtle motions of facial muscle, breath and pulse, and possess wide linear range besides good repeatability and excellent durability. Meanwhile, the prepared sensors were designed into a 4 × 4 array, and the array achieved monitoring of spatial distribution of the applied pressure. Our strategy could be used to fabricate flexible strain sensors with wide linear range, which facilitate further integration to achieve potential applications in detection of human activity, electronic skin, and soft robots.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Liping Li,Wanhui Shi,Yang Yang,Yunzhen Chang,Ying Zhang,Shujie Liu,Sheng Zhu,Gaoyi Han
Soft self-healing materials are promising candidates for flexible electronic devices due to their exceptional compatibility, extensibility, and self-restorability. Generally, these materials suffer from low tensile strength and susceptibility to fracture because of the restricted microstructure design. Herein, we propose a hydrothermal-freeze-thaw method to construct high-strength self-healing hydrogels with even interconnected networks and distinctive wrinkled surfaces. The integration of the wrinkled outer surface with the three-dimensional internal network confers the self-healing hydrogel with enhanced mechanical strength. This hydrogel achieves a tensile strength of 223 kPa, a breaking elongation of 442%, an adhesion strength of 57.6 kPa, and an adhesion energy of 237.2 J m -2 . Meanwhile, the hydrogel demonstrates impressive self-repair capability (repair efficiency: 93%). Moreover, the density functional theory (DFT) calculations are used to substantiate the stable existence of hydrogen bonding between the PPPBG hydrogel and water molecules which ensures the durability of the PPPBG hydrogel for long-term application. The measurements demonstrate that this multifunctional hydrogel possesses the requisite sensitivity and durability to serve as a strain sensor, which monitors a spectrum of motion signals including subtle vocalizations, pronounced facial expressions, and limb articulations. This work presents a viable strategy for healthcare monitoring, soft robotics, and interactive electronic skins.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Li-Chuan Jia,Wen-Jin Sun,Ling Xu,Jie-Feng Gao,Kun Dai,Ding-Xiang Yan,Zhong-Ming Li
Superhydrophobic materials integrating electrical conductivity with stretchability are strongly desirable for emerging flexible electronic devices, such as wearable electrical heaters, strain sensors, and flexible power storage apparatus, due to their long-term safe service even under wet or corrosive environments. However, it still remains a great challenge to realize the integration of superhydrophobicity, electrical conductivity, and stretchability. Herein, we demonstrated the fabrication of highly stretchable superhydrophobic conductive textile (SCT) by in situ growth of silver nanoparticles (AgNPs) and designing a poly(dimethylsiloxane) (PDMS) layer on a textile. The resultant SCT exhibited superhydrophobicity with a large water contact angle of 154.6° and a superior electrical conductivity of 861.3 S/m. Moreover, the SCT can maintain superhydrophobicity and high electrical conductivity even after undergoing 5000 stretching–releasing (30% strain) cycles and chemical attacks for 10 h, respectively. The SCT demonstrated excellent electrical-heating performance with a high saturation temperature (63.6 °C) at an ultralow supplied voltage (1.2 V), thus holding promise as a wearable heater for thermal management. These findings conceivably make our SCT have great potential for application in flexible electronic devices that operate under extreme mechanical deformations and wet or corrosive environments.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 43
·20268-20284
·
IF 4.682
Zou Liqing,Lin Pengcheng,Zhang Jianyang,Su Hua,Chen Ying
The problem of heat dissipation has become a key to maintain the operation state and extending the service time of electronic components. Developing effective thermal management materials and technologies is of great significance to solve this problem. Previously, passive cooling using phase change materials (PCMs) has been proposed as a thermal management method for electronic devices. In this work, a hybrid thermal management system coupling the heat storage of PCMs and the thermal conduction of high conductivity materials is designed toward thermal management of electronic devices. Specifically, ternary composite gels consisting of eicosane, styrene-ethylene-butylene-styrene (SEBS) and boron nitride (BN) are fabricated by liquid-phase blending and sol–gel transition toward the highly efficient thermal management of electronic devices. The van der Waals force between SEBS and eicosane and the π–π interaction between SEBS and BN enable the excellent form-stability of the ternary composite gels. Taking advantage of the merits of the functional components, the proposed ternary composite gels demonstrate a high thermal energy storage capacity of 157.5 Jg −1 and high thermal conductivity of 1.08 Wm −1 K −1 . The ternary composite gels are applied in the thermal management of CPU and chip to reduce their working temperature via the synergistic effect of heat dissipation and heat storage. It is anticipated that the ternary composite gels create a state of the art alternative for the next-generation flexible and multifunctional thermal management devices. Graphical Abstract
研究领域:
材料科学
·
热能工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Guoyan Yang,Zuozhu Yin,Yuanting Deng,Zihao Li,Yuhua Chen,Wenbo Xiao,Zhen Hong,Yidan Luo,Chan Xie,Mingshan Xue
The lifetime of electronic devices in complex environments is affected by the impact of high temperature water vapor on their performance. Equipping electronic devices with superhydrophobic properties and improved thermal conductivity will be the strategy of the future. In this paper, a surface material with high thermal conductivity and superhydrophobic properties is explored to address the problem of electronic device failure caused by heat and water vapor. To solve this problem, anti-temperature superhydrophobicity can be obtained by spraying alumina/nano-silicon carbide/thermoplastic elastomer composite powder (Al 2 O 3 /nano-SiC/SEBS) modified with 1 H,1 H,2 H,2H-perfluorooctyltriethoxysilane (POTS) on graphene membranes. A spherical Al 2 O 3 /nano-SiC composite superhydrophobic coating (ASS-GM) was formed on the surface of graphene-based composite membranes by spraying method. The results showed that the optimal ratio was m(Al 2 O 3 ): m(SiC) = 8:1, and the static water contact angle of the coating was 162 ± 2.5°, and the surface energy was reduced. The ASS-GM significantly improves the thermal conductivity and superhydrophobicity of graphene-based composite membranes, achieving a double improvement in performance. The coating also offers excellent self-cleaning and antifouling properties compared to other materials. The ASS-GM is able to maintain a certain hydrophobicity angle (156 ± 1.5°) in harsh environments. This work provides practical applications for electronic coatings, which are important for improving the overall reliability and durability of electronic products.
研究领域:
材料科学
·
热管理工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Kaiming Zhang,Yuetao Liu,Zhe Wang,Chengxin Song,Chuanhui Gao,Yumin Wu
Polymer materials with good mechanical properties, solubility and flexible self-healing conditions were of great value to the development of modern high-tech fields. Herein, α,ω-aminopropyl terminated polydimethylsiloxane (PDMS, Mn = 2000), terephthalaldehyd (TA) and 3-aminophenylboronic acid (APB) were used to construct a three-dimensional network via simple and effective reactions, such as the Schiff base reaction and the dehydration reaction. The obtained PDMS elastomer prepared by low molecular weight main chain could achieve very good mechanical performance of tensile strength 2.54 MPa and the average elongation at break of 275.3%. Through the dynamic imine bonds formed by Schiff base reaction and the coordination of boron oxygen bonds and hydrogen bonds, we have constructed a high efficiency self-healing network. The network could achieve self-healing at room temperature with a self-healing efficiency of 91.6%, at high temperature with a self-healing efficiency of 95.1% and in water at a self-healing efficiency of 85.5%. In addition, multi-walled carbon nanotubes (MWCNTs) was compounded with a polymer system to prepare self-healing flexible electronic devices. Due to the electric resistance of PDMS/MWCNTs sensitively modified with the change of tensile and bending angles, this might be of great significance for the application of sensors.
研究领域:
材料科学
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Xin Guan,Mengliang Bi,Shengyu Sun,Yongqi Yang,Jian Sun,Zhaohui Jin,Hailun Ren,Zijian Gao
A hydrogel is an ideal matrix material for flexible electronic devices, electronic skin and health detection devices due to its outstanding flexibility and stretchability. However, hydrogel-based flexible electronic devices swell once they are placed in a high humidity or underwater environment. The swelling behavior could damage the internal structure of hydrogels, ultimately leading to the reduction or complete loss of mechanical properties, electrical conductivity and sensing function. In order to resolve the above problems, a double network ionogel with remarkable anti-swelling behavior, stretchability and conductive properties was prepared. The ionogel consisted of gelatin (G) and copolymerization of acrylic acid (AA), 2-hydroxyethyl methacrylate (HEMA), butyl acrylate (BA), dimethylaminoethyl methacrylate maleate (D) and N,N′-methylene-bis-acrylamide (MBAA). Due to the dense crosslinking network and hydrophobic interaction, the ionogel exhibited remarkable anti-swelling properties (7.64% of the 30-day equilibrium swelling ratio in deionized water). D and MBAA were simultaneously introduced into the ionogel system as cross-linking agents to provide a large number of cross-linking points, improving the cross-linking density of the ionogel. Importantly, the introduction of D avoided ionic leakage by free radical copolymerization. Furthermore, the ionogel maintained stable mechanical properties and conductivity after being submerged in deionized water owing to remarkable anti-swelling performance. The mechanical properties of the ionogel retained 89.75% of the initial mechanical properties after a 5-day immersion in deionized water. Therefore, this ionogel could be employed as an underwater flexible wearable sensor for high humidity or underwater motion monitoring.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）