ACS Applied Nano Materials
·
2025
·
IF 5.5
Wei Sheng,Jianxin Zhou,Wentao Li,Wenjie Xu,Yuxi Jia,Tao Zhang,Weini Wang
Hydrogels exhibit mechanical properties very similar to biological skin, rendering them promising candidates for electronic skin (e-skin) sensors. However, these materials suffer from significant temperature-induced electrical drift and unstable interfacial contact with metallic electrodes. In this study, we employ elastic graphene foam as electrodes to realize a fully flexible hydrogel device architecture. By designing straight-line and serpentine hydrogel geometries, we enable temperature self-calibration during strain measurements. The resulting hydrogel sensor demonstrates exceptional performance, including constant strain sensitivity (GF = 2.44 with linearity R2 = 0.9999), rapid strain dynamic response (70 ms), low strain detection limit (0.05%), and low temperature drift. This approach not only addresses critical limitations in hydrogel-based sensing platforms but also establishes a robust framework for developing more reliable and versatile flexible sensors.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 108
·63048-63054
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IF 3.708
Liang Ren,Fan Yang,Chunxia Wang,Yongfeng Li,Hailing Liu,Zhiqiang Tu,Liqiang Zhang,Zhichang Liu,Jinsen Gao,Chunming Xu
We have developed an environmentally-friendly method for the synthesis of Pd nanoparticle (Pd NPs) decorated different graphene supports, and the morphology and structure of the hybrids are characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and elemental mappings. Four hybrid materials based on graphene foam (GF), oxidized graphene foam (OGF), graphene oxide (GO) and reduced graphene oxide (RGO) have been used to catalyze Heck coupling reactions, and the effect of support on the activity of the hybrid material has been studied. Our results have revealed that Pd NP decorated OGF (Pd/OGF) is the most active catalyst, showing better performance than the commercial Pd/C catalyst. More importantly, the Pd/OGF catalyst has been successfully used for one-pot synthesis of dibenzyls with different aryl bromides and olefins, which has simplified the separation and purification process and realized a green organic synthesis process.
研究领域:
材料科学
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催化化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Sudong Yang,Lin Chen,Chunchun Wang,Masud Rana,Peng-Cheng Ma
Surface free energy and roughness are two predominant factors governing the hydrophilicity/hydrophobicity of materials. This paper reported the surface roughness induced hydrophobicity of graphene foam by incorporating silica nanoparticles onto graphene sheet via a sol-gel method and subsequent modification using silane . Various techniques were employed to characterize the morphology, composition and surface properties of sample. The results showed that the as-prepared graphene foam exhibited a superhydrophobic surface with a high water contact angle of 156°, as well as superoleophilicity with excellent adsorption capacities for a variety of oil compounds. Benefiting from the integration of enhancement on the surface roughness and reduction on the surface free energy of material, the graphene foam developed in this study had the capability to effectively separate oil-water mixture with excellent stability and recyclability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Zepei Yu,Daili Feng,Yanhui Feng,Xinxin Zhang
A systematic, carbon-based composite phase change materials with substantial increase of the thermal conductivity and energy storage density was assembled by encapsulating PEG into graphene foams (GF), CNTs and hierarchical porous materials derived from GF and CNT. The influence of preparation approaches on the microstructures, thermal conductivity and thermal energy densities of composites were assessed by various characterization tools. The results obtained indicated that graphene foam-CNT hybrid structures (GCNT) composites exhibit excellent thermal conductivity, 118% higher than pure PEG and 89.5% higher relative to that of GF/PEG@CNT (GPC) composites. The content and interconnected hierarchical porous carbons enhance thermal transfer in composites during the process of phase change. Notably, GCNT@PEG (GCP) had a maximum of up to 80 wt% PCM loading. This composite has a melting latent heat of 128.7 kJ/kg, up to 39.3% and 87.5% higher than those of other composites. CNTs have significantly enhanced the thermal transport of composite PCMs, but the interfacial thermal resistance of CNTs and graphene foam is the bottleneck of heat transfer of composite PCMs. The current results create the conditions for the application of novel hierarchical porous carbon composite PCMs for high-energy density, thermal energy conversion, and shape-stabilized PCMs (ssPCMs) with improved thermal conductivity.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 14
·2324
·
IF 4.329
Liusi Wang,Haoliang Li,Shuxing Xiao,Mohan Zhu,Junhe Yang
With the development of integrated devices, the local hot spot has become a critical problem to guarantee the working efficiency and the stability. In this work, we proposed an innovative approach to deliver graphene foam/polyaniline@epoxy composites (GF/PANI@EP) with improvement in the thermal and mechanical property performance. The graphene foam was firstly modified by the grafting strategy of p-phenylenediamine to anchor reactive sites for further in-situ polymerization of PANI resulting in a conductive network. The thermal conductivity (κ) and electromagnetic interference shielding (EMI) performance of the optimized GF/PANI4:1@EP is significantly enhanced by 238% and 1184%, respectively, compared to that of pristine EP with superior reduced modulus and hardness. Such a method to deliver GF composites can not only solve the agglomeration problem in traditional high content filler casting process, but also provides an effective way to build up conductive network with low density for thermal management of electronic devices.Keywords:graphene foam;in-situ polymerization;conductive network;thermal management;EMI shielding
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2014
·Vol. 25
·期 4
·597-605
·
IF 10.439
Haiguang Zhu,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
One of the most pervasive environmental issues is water contaminated with oil or organic solvents; this global challenge calls for emerging materials that could effectively separate oil or organic solvents from water. Here, such a material is presented by integrating 3D porous graphene foam (GF) with a smart pH-responsive surface, showing switchable superoleophilic and superoleophobic properties in response to the medium pH. The key chemistry applied in this study is to modify the 3D porous GF with an amphiphilic copolymer containing a block of poly(2-vinylpyridine) and polyhexadecyl acrylate (P2VP -b- PHA), resulting in a smart GF ( ss- GF) with an either superoleophilic or superoleophobic surface at different medium pH. The as-designed ss- GF can effectively absorb oil or organic solvents from the aqueous media by using its superoleophilic surface at pH of 7.0, and it can also completely release the adsorbates when the pH is switched to 3.0 (and the surface of ss- GF is therefore shifted to superoleophobic); with a continuous operation of many cycles (e.g., >10). Furthermore, the as-designed ss- GF shows superior absorption capacity for oil and organic solvent, with a high capacity of ≈196 times of the weight relative to that of the pristine ss- GF. The present work suggests encouraging applications of the ss- GF to water–oil and water–organic solvent separation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Yanru Chen,Kai Pang,Xiaoting Liu,Kaiwen Li,Jiahao Lu,Shengying Cai,Yingjun Liu,Zhen Xu,Chao Gao
The rapid development of high-power and high-frequency devices in electronics leads to the urgent demands for advanced thermal interface materials (TIMs) with both superior thermal conductivity and excellent structural stability. Many attempts have exploited the silicone-based TIMs with higher thermal conductive fillers , however, their structural stability remains challenging in some extreme conditions. Here we fabricate the carbon-based graphene foam roll (GFR) as flexible TIM by hydroplastic foaming (HPF) and interface strengthening methods. The enhanced interface bonding within GFR by impregnation of graphene oxide (GO) enables its superior structural integrity. It can keep mechanical stability after 10,000 cycles at a compressive strain of 60% and sustain high temperature up to 500 °C, which has never been realized in previous reports. We demonstrate the GFR-TIM not only achieves very high structural stability but also exhibits higher thermal conductivity (∼17.42 W/mK) than most commercial TIMs (5–10 W/mK). The GFR-TIM can serve as an efficient heat-dissipation component for the CPU and shows superior cooling efficiency compared to commercial TIMs. Our work provides an advanced graphene-based TIM with excellent environment-adaptive and anti-fatigue properties, broadening their application in extreme environments, such as hypersonic vehicles , high-throughput satellites and high-power radar systems .
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
RSC Advances
·
2016
·Vol. 6
·期 6
·4889-4898
·
IF 3.289
Sudong Yang,Lin Chen,Lei Mu,Bin Hao,Junteng Chen,Peng-Cheng Ma
Porous materials with hierarchical structures are of increasing importance because of their potential application in separation and electronic technology. Herein, three-dimensional graphene foam (GF) was prepared by using polystyrene particles as a sacrificial template and an autoclaved leavening process, and the GF was further processed by carbon dioxide as an activation agent to produce meso- and nano-pores in the foam. The resulting hierarchical graphene foam (HGF) exhibits high porosity, hydrophobicity and excellent thermal stability. Compared to regular GF, due to the integration of hierarchically porous structures, HGF manifests outstanding performance for oil adsorption when applied to separating oil–water mixtures, through a combination of hydrophobicity and capillary action.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
Micromachines
·
2022
·Vol. 13
·期 10
·1589
·
IF 3.523
Yucheng Zhou,Jianxin Zhou,Jiasheng Rong,Cong Hu
Shape memory polymers (SMPs) have gained increasing attention as intelligent morphing materials. However, due to the inherent electrical insulation and poor thermal conductivity of polymers, deformation and temperature control of SMPs usually require external heating devices, bringing about design inconveniences and fragility of interfaces. Herein, we report a shape memory composite that integrates reliable temperature and shape control functions into the interior. The composite is comprised of resin-based SMP and three-dimensional interconnected graphene foam (3DGF), exhibiting a high recovery rate and thermal/electrical conductivity. With only 0.26 wt% of graphene foam, the composite can improve electrical conductivity by 15 orders of magnitude, thermal conductivity by 180%, tensile strength by 64.8%, and shape recovery speed by 154%. Using a very simple Joule heating scheme, decimeter-sized samples of the composite deformed to their preset shapes in less than 10 s.
研究领域:
材料科学
·
智能材料
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jinzhe Li,Shixiang Shuai,Jingjing Wang,Tian Li,Jiatong Li,Zhengkang Xu,Runhua Zhang,Li Ma,Fanbin Meng
Recently, in response to the rapid development of detection technologies, significant attention has been focused on intelligent stimuli-responsive stealth materials that feature dynamically adjustable electromagnetic (EM) wave absorption performance. External electrical stimulation has emerged as the optimal choice for active adjustments among various stimuli-responsive behaviors due to its easy accessibility and precise controllability. However, developing high-performance electrical-stimuli-responsive EM wave absorption materials is still in its infancy. In this study, novel hybrid graphene-based foams were fabricated through a multistage assembly process, achieving outstanding absorption performance. The optimal reflection loss ( RL ) recorded was −51.87 dB at 12.73 GHz, accompanied by the broadest effective absorption bandwidth ( EAB ) of 7.8 GHz. Importantly, under an external electrical field — as elucidated by simultaneous stimulation results — the absorption performance (the optimal RL ) exhibits a maximum amplitude variation of 18.83 %. Additionally, hybrid foams efficiently integrate other crucial properties such as hydrophobicity, thermal insulation, and flame retardance, enhancing their application and serviceability. Consequently, our work introduces an innovative approach for fabricating intelligent EM wave absorption materials capable of real-time dynamic EM camouflage in complex environments.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Ding Ai,Yanhao Ma,Hao Yu,Yuan Chang,Chenglong Wu,Yuting Han,Yonghong Cheng,Chengye Dong
Next-generation flexible electronics call for high-performance electromagnetic interference (EMI) shielding materials with lightweight and multifunctionality. Here, the chemical vapor deposition (CVD) graphene foam (GF) composites, containing flexible polymer matrix and magnetic Fe 3 O 4 nanoparticles, are reported. The systematic manipulation of GF growth condition and the content of Fe 3 O 4 reveals the effect of graphene thickness and integration of Fe 3 O 4 on improving the electromagnetic shielding performance of composites. Owing to abundant internal interfaces, high conductivity from the three-dimensional interconnected graphene, and magnetic loss from Fe 3 O 4 , the ternary composites exhibit substantial improvement in microwave absorption, resulting in a superior EMI shielding effectiveness (SE) and absolute EMI SE up to 71 dB and 3641 dB·cm 2 /g, respectively, at a low density of 0.65 g/cm 3 and minimal thickness of 0.3 mm. Moreover, the flexible composites display great EMI shielding stability after repeatedly bending, validating the composites as promising materials for practical applications in aerospace and flexible electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Guo-Biao Xu,Jing-Min Cui,Hong Liu,Guang-Gang Gao,Yun-Feng Qiu,Shu-Meng Zhang,Dong-Mei Wu
ABSTRACT Polyoxometalates (POMs) as efficient electrochemical catalytic components were successfully loaded on three-dimensional graphene foam (3DGF) forming novel POM-based carbon-material of POM@3DGF. Being the first time, POMs were loaded onto 3DGF matrix as a highly selective electrochemical biosensor, by which xanthine (Xan) and guanine (Gua) can be detected simultaneously with separated electrochemical signals. At pH = 2.0 buffer solution, two oxidation signals ascribed to Xan and Gua bases were observed at about 1.05 and 1.13 V respectively, which could not be observed separately by previous reported 1D carbon nanotube or 2D graphene modified GCEs. Furthermore, POM@3DGF modified GCE can be used to detect Xan and Gua bases in MCF-7 cell lysates, which extends the detection species of purines in cells by electrochemical approach. Our study opens a new avenue to accurate electrochemical assay of cellular purines by POMs-based carbon-materials.
研究领域:
生物化学
·
材料科学
✓ 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）