RSC Advances
·
2020
·Vol. 10
·期 23
·13517-13524
·
IF 3.119
Chunbo Wang,Bing Cong,Junyu Zhao,Xiaogang Zhao,Daming Wang,Hongwei Zhou,Chunhai Chen
Herein, MWCNT-graft-polyimides (MWCNT-g-PIs) were prepared by the in situ grafting method. Strengthening the interfacial interaction between MWCNTs and polyimide chains decreased their interfacial thermal resistance (RC). In contrast to the RC of 10% MWCNT/PIs, the RC of 10% MWCNT-g-PI decreased by 16.7%. Hence, MWCNT-g-PIs possessed higher thermal conductivity than MWCNT/polyimides (MWCNT/PIs). Meanwhile, the Tg values of all the samples (MWCNT/PIs and MWCNT-g-PIs) were greater than 399 °C (by DMA). Compared with MWCNT/PIs, 5% and 10% MWCNT-g-PIs showed enhancement in thermal stability in air. The storage modulus retentions were greater than 63% at 200 °C and 45% at 300 °C. Also, 5% and 10% MWCNT-g-PIs maintained the high tensile strength of pure PI, and the tensile modulus increased up to 2.59 GPa on increasing the loading amount of MWCNTs. This study sheds light on improving the thermal conductivity of polyimides effectively at relatively low loadings.
研究领域:
材料科学
·
高分子化学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Guohao He,Mingming Li,Xin Li,Qimeng Wang,Zhiying Xie,Yali Xue,Kai Wang,Jun Yu,Gengzhi Sun,Haizhou Yu,Xiaoyan Qiu
Isoporous membranes from a process coupling the self-assembly of block copolymer with nonsolvent-induced phase separation (SNIPS) could enhance both the permeability and selectivity due to the high pore density and uniform pore sizes. Whereas, it is difficult to precipitate PAA based block copolymer in nonsolvent to make membranes because PAA blocks are hydrophilic. Herein, isoporous PS 678 - b -PAA 180 membranes were well prepared after reinforced by multiwalled carbon nanotubes decorated with silver nanoparticles (MWCNT-Ag). Such composite membranes bear not only regular channels with an effective pore diameter of ca. 18.85 nm, but also high water permeance of 1770.35 L bar −1 m −2 h −1 . With the participation of carbon nanotubes, the PS- b -PAA isoporous membrane exhibits excellent photothermal conversion properties, which endows the membrane with an efficiency of ca. 10.6 kg m −2 h −1 for light energy-driven seawater desalination and wastewater purification. Moreover, the silver particle-decorated CNTs enable the membrane to be antibacterial, which ensures reliability in long-term application.
研究领域:
材料科学
·
环境工程
·
纳米技术
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Yiqing Xue,Yubo Wang,Yanhua Wang,Wenyan Liang,Fangxin Wang,Dongyu Zhu,Huanyu Zhao
Ice accumulation often threatens the safety of human life and property. How to effectively solve the problem of solid surface icing has been the research work of many researchers. However, how to prepare superhydrophobic and anti-icing film with multi-strategy collaborative deicing is still facing great challenges. In this paper, a design strategy of photothermal and electrothermal superhydrophobic nanocomposite film based on polyetherimide (PEI) was proposed. Multi-walled carbon nanotubes (MWCNT) were dispersed in PEI matrix by solution blending method, and a lotus leaf like rectangular micropillar array was constructed on the surface of the film by laser etching technology. Then, the surface was fluorinated to further reduce the surface energy. Finally, a kind of MWCNT/PEI nanocomposite film with passive anti-icing and active deicing with photothermal and electrothermal collaboration was successfully prepared. The freezing time of droplets on MWCNT/PEI nanocomposite film is about 6.7 times longer than that of pure PEI film. This film exhibits excellent superhydrophobicity (CA = 156.6°), while also having excellent photothermal and electrothermal conversion properties. In addition, we also conducted various tests on MWCNT/PEI nanocomposite film to verify its reliability in the actual application environment. The MWCNT/PEI nanocomposite film with the function of anti-icing and photothermal and electrothermal active deicing is expected to solve the problem of solid surface icing in daily life, and also provides a new idea for the development of a new generation of anti-icing/deicing film.
研究领域:
材料科学
·
表面工程
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Alif Daffa Setyoputra,Heydar Ruffa,Heri Sutanto,Agus Subagio
Increasing energy demands are triggering the development of high performance, low-cost supercapacitor electrode material, particularly in countries that are shifting to renewable energy as their current energy supply cannot meet their significant energy demands. These countries require high-voltage, safe and long-lasting electrical energy storage devices. Multi-walled carbon nanotubes (MWCNTs), reduced graphene oxide (rGO) and Titanium Dioxide (TiO 2 ) were tested during an in-situ hydrothermal process. The structure test of X-ray diffraction (XRD) and scanning electron microscope (SEM) characterisation was used to determine the relation between the morphology of the electrode and its electrochemical value. The morphology of the composite electrode indicated that the nanocomposite electrode had better values than the single material electrode. Additionally, cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS) tested in a two-electrode system indicated that the specific capacitance of MWCNT-rGO-TiO 2 30% was 168 F g −1 and showed the energy and power density to be 15 Wh kg −1 and 337.5 W kg −1 , respectively. This result was higher with the other electrode due to the faradaic and non-faradaic processes in the electrode.
研究领域:
材料科学
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能源技术
·
电化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Meng Yang,Hao Guo,Lei Sun,Ning Wu,Mingyue Wang,Fan Yang,Tingting Zhang,Junye Zhang,Zhilan Pan,Wu Yang
In this present work, a carboxylated multi-walled carbon nanotubes (MWCNT-COOH) and covalent triazine framework (CTF-1) co-modified glassy carbon electrode (GCE) is prepared and used for simultaneous electrochemical detection of hydroquinone (HQ) and catechol (CC). Due to the synergistic effect between the high electrocatalytic activity and good conductivity of MWCNT-COOH and large surface area of CTF-1, the prepared modified electrode exhibits good selectivity and high sensitivity for the simultaneous determination of HQ and CC. In the neutral phosphate buffer, HQ and CC produce a pair of well-defined redox peaks on the MWCNT-COOH/CTF-1/GCE. The concentrations of CC and HQ show good linearity in the range of 2–280 μM and the detection limits of HQ and CC are 0.12 μM and 0.17 μM, respectively. The prepared electrochemical sensor can be employed to determine contents of HQ and CC in real samples.
研究领域:
分析化学
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环境科学
·
材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 3
·963-971
·
IF 8.867
Yuchao Wang,Canzhu Wang,Xiangju Song,Suresh Kumar Megarajan,Heqing Jiang
Solar-driven water evaporation assisted by photothermal membranes is considered as one of the sustainable and cost-effective strategies for pure water generation and wastewater treatment. Herein, we report a facile but effective approach to improve the photothermal performance by combining 2D reduced graphene oxide (rGO) and 1D multi-walled carbon nanotubes (MWCNTs), which have different nanomorphologies. The photothermal layer can be easily deposited on different substrate materials via simple vacuum assistance. Such a composite photothermal layer shows a rough surface with a controllable nano-structure, which can thus optimize solar light harvesting. On the other hand, the formation of a loose internal porous structure and suitable wettability ensure water transport inside the photothermal layer during evaporation. The surface temperature reaches as high as 78 °C even under one sun irradiation (1 kW m−2), which is 10 °C higher than the result of pure rGO membranes. When loaded on a PVDF substrate, the rGO–MWCNT based membrane is flexible and shows an obvious improvement in the evaporation rate, about 79.0% and 8.9% higher than those of pure rGO and MWCNT membranes, respectively. The solar thermal conversion efficiency can reach up to 80.4% without any extra accessory for thermal management. Based on our results, the nanocomposite strategy is facile and effective for the development of novel photothermal membranes for high-efficiency evaporation, and contributes to the widespread application in the fields of desalination and wastewater treatment.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Binxuan Diao,Chenhao Cong,Fenglin Sun,Hongjiang Li,Haoran Zhang,Xuhao Wang,Mingliang Jin,Sooman Lim,Xinlin Li,Se Hyun Kim
The self-stacking propensity of metal–organic frameworks (MOFs) during synthesis, combined with their intrinsic limitations in electrical conductivity and mechanical stability, constrains their utility as high-capacity energy sources in wearable electronics. Here, we employ a surfactant-assisted method to mitigate the Z-axis stacking of zinc metalloporphyrin organic frameworks (NMOFs), yielding ultrathin two-dimensional (2D) material sheets. By integrating carboxyl multiwalled carbon nanotubes into these nanosheets (denoted as C-NMOF-x), the lamellar structure of MOF is preserved while promoting the formation of rich multistage micropores and continuous conductive channels. This structural refinement remarkably enhances electrochemical properties, including capacitance, electronic conductivity, and cycling stability. Leveraging synergistic interactions, the resulting C-NMOF-4 composite achieves a specific capacitance of 0.152 mAh/g in a three-electrode system at a current density of 1 A/g. Furthermore, the modulated C-NMOF-4 composites are successfully formulated into homogeneous e-inks suitable for dispensing printing, enabling the mass production of flexible micro-supercapacitors (MSCs). Notably, these MSCs maintain 95 % of their capacitance even after 180° bending under wearable conditions. This surface and interface microstructure modulation strategy holds promise for enhancing the synergistic coupling effects of 2D materials and offers new avenues for the application of innovative 2D materials in wearable electronics.
研究领域:
材料科学
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能源技术
·
纳米科技
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jia An,Mengfei Luo,Meizheng Li,Hongyuan Cui,Yufei Liu
Choline, as an important neurotransmitter and metabolic substance, plays an important role in human metabolism, information transmission, regulation of apoptosis, and promotion of fat metabolism, etc. Its level changes and metabolic abnormalities can also be used as diagnostic markers for a variety of diseases. In this study, we developed an advanced electrochemical choline biosensor by modifying the electrode surface with MXene, multi-walled carbon nanotubes functionalized with gold nanoparticles (MWCNT-AuNPs), and Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs). MWCNT will be interspersed with MXene to avoid strong interlayer aggregation. At the same time, the composite of AuNPs and MWCNT can avoid the agglomeration of Au and further improve the conductivity under the synergistic effect. Improve sensor performance through synergistic effect, this combination of multi-component nanomaterials may provide higher electron conduction efficiency and current response rates. The electrochemical sensors, which were doped with various nanomaterials, were thoroughly investigated utilizing electrochemical impedance spectroscopy (EIS) in conjunction with time–current curve analysis. The findings demonstrated that the MXene/MWCNT-AuNPs/Fe 3 O 4 NPs nanocomposites possess a substantial specific surface area, an abundance of active sites, and enhanced electrical conductivity, all of which contributed to the improved conductivity and current response of the enzyme electrode. The resulting biosensor demonstrated superior sensitivity and selectivity for choline detection compared to previously reported electrodes. Specifically, it exhibited a linear range of 0.033–133.33 μM, a sensitivity of 8.8nA/μM, a response time of 5 s, and a detection limit of 22 nM. Importantly, the sensor showed high accuracy in detecting choline levels in human serum and cerebrospinal fluid samples, indicating its potential for practical applications in real-world clinical settings. This advancement holds promise for the effective prevention of the recurrence of glioma, Alzheimer’s disease, Parkinson’s disease, and other related conditions.
研究领域:
生物传感技术
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医学检测
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材料科学
·
神经生物学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Wen-Yi Sun,Wen-Hao Geng,Peng-Fei Qian,Tian-Li Wang,Li-Chao Jing,Jing-Yi Feng,Yu-Han Wang,Yue-Xin Wang,Han-Lin Zhou,Hong-Zhang Geng
The rapid advancement of advanced gadgets for electronic use has generated an urgent need for electromagnetic interference (EMI) shielding films possessing outstanding thermal conductivity. Nonetheless, achieving these dual characteristics through the establishment of a dense electrical network of connections within a framework of polymers remains challenging. In this study, flexible composite films (MPP) with enhanced performance were prepared using a solution-melting method with multiwalled carbon nanotubes (MWCNT-NH2), dopamine-modified graphene (P@GNs), and poly(vinylidene fluoride)-hexafluoropropylene copolymer (PVDF-HFP) to improve both EMI shielding and thermal conductivity. Dopamine hydrochloride (PDA) was employed to modify graphene during the fabrication process, and its synergistic interaction with MWCNT-NH2 established an effective conductive network that enhanced charge transfer efficiency in PVDF-HFP. The electrical resistivity and EMI shielding efficacy of the composite film are achieved through the judicious arrangement of conductive fillers and polymers. With the thickness of 0.2 mm, the film attained an electromagnetic shielding effectiveness (EMI SE) of 32.54 dB and an impressive in-plane conductivity of 1000 S/m. Additionally, the film demonstrated excellent thermal conductivity caused by its more prominent electrical conductivity, reaching a temperature of approximately 172 °C at 5 V. Considering these benefits, the flexible composite film produced throughout the current research holds significant promise for implementation in flexible electronics and electromagnetic shielding and may contribute innovative solutions for the forthcoming generation of advanced devices that utilize electronics.
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DOI
高影响因子
Biomimetics
·
2025
·Vol. 10
·期 6
·363
·
IF 3.9
Qiyun Zhong,Qingsong He,Diyi Liu,Xinyu Lu,Siyuan Liu,Yuze Ye,Yefu Wang
In contrast to traditional hydrogels, which are susceptible to water evaporation and structural degradation, non-hydrogel materials are engineered for superior stability and consistent performance. Here, we report an innovative piezoelectric polyvinyl chloride/multi-walled carbon nanotube polymer gel (PVC/MWCNT polymer gel, PMPG) with exceptional linearity (as low as 1.31%), high sensitivity (50–310.17 mV), rapid response (172–189 ms), and thermal stability. Under strain induction, ordered rearrangement of dipoles in PMPG and the enhancement of MWCNTs generate a potential difference. Increasing MWCNT content enhances output voltage, sensitivity, conductivity, maximum stress, Young’s modulus, and toughness, while reducing nonlinear error. Higher dibutyl adipate (DBA) content increases output voltage and slightly improves sensitivity but decreases mechanical strength. The optimal PMPG (PVC:DBA = 1:5, 1 wt% MWCNTs) exhibited outstanding performance. It exhibits a nonlinear error as low as 1.31%, a conductivity of 25.4 μS/cm, an 80% compressive strain tolerance (273 kPa stress), and dimensional stability for 90 days in air. By integrating PMPG with machine learning algorithms, soft robotic grippers gain advanced contact perception capabilities, enabling applications in medicine, rescue, exploration, and other fields requiring fine manipulation and adaptability. This work highlights PMPG’s potential as a stable, high-performance material for soft robotics and beyond.
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产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Li Jinsong,Shi Xiaoxia,Yang Huihuang,Cai Li,Li Zhongbo,Zhang Lijun
Urea is a key biomarker for diagnosing various kidney and liver disorders, which can be assessed through sensing platforms. However, existing urea sensors have performance issues in real samples. Herein, a novel fiber-organic electrochemical transistor (F-OECT) sensing platform was constructed by sequentially depositing cobalt-based metal-organic framework material (ZIF-67), carboxylated multi-walled carbon nanotubes, poly (3,4-ethylenedioxythiophene), and urease on cotton fibers for urea determination. The resulting F-OECT sensor exhibited excellent performance toward urea detection with a high sensitivity (82.91 μA/decade). This performance is attributed to the synergistic effect of the hierarchical composite: the significantly enlarged electrochemically active surface area of PEDOT/f-MWCNT/ZIF-67 facilitates high-density urease immobilization, while the conductive network ensures efficient signal transduction, coupled with the intrinsic signal amplification of the OECT architecture. Under optimized conditions, the F-OECT sensor illustrated a wide linear response range (1 pM-10 mM) and a low detection limit of 1 pM toward the detection of urea, coupled with an excellent selectivity, reproducibility, and stability. More importantly, the F-OECT sensor was able to detect urea in real sweat and urine samples. Based on these encouraging data, the F-OECT sensor was connected to a printed circuit board to transmit signals via Bluetooth, and the results showed a sensor capable of visually quantifying urea. Overall, the proposed F-OECT sensor looks promising for future non-invasive and sensitive liquid detection of urea, thereby deserving further research and development.
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Huyue Wei,Mingzhu Yang,Chengshuai Huang,Xiaojie Yue,Jiabin Cai,Xinyi Wang,Kai Fan,Linxi Dong,Gaofeng Wang,Dujuan Li
Neuron-specific enolase (NSE), a tumor marker of small cell lung cancer (SCLC), has high application value in the early diagnosis of SCLC. In this study, a dual signal electrochemical aptasensor for NSE was constructed based on hemin/reduced graphene oxide/multi-walled carbon nanotube (H–rGO–MWCNT) nanocomposites. Hemin played a dual role, functioning not only as an in situ electrochemical probe but also exhibiting excellent peroxidase-like properties, effectively catalyzing the electroreduction of H2O2. Reduced graphene oxide and multi-walled carbon nanotubes exhibited excellent conductivity. Through their binding with hemin, the nanocomposites achieved a larger specific surface area, providing numerous active sites for capturing the NSE aptamer. In the presence of NSE, the specific adsorption between the antigen and the aptamer formed a stable antigen–aptamer structure, which inhibited the performance of hemin, resulting in the weakening of the electrochemical signals of hemin and H2O2. Leveraging these characteristics, the sensitive and cost-effective dual-signal electrochemical aptasensor has been fabricated for the detection of NSE. One signal corresponded to differential pulse voltammetry (DPV) of hemin, while the other signal was derived from chronoamperometry, capturing the catalytic reduction of H2O2. The linear ranges for NSE were 1 pg mL−1 to 1 μg mL−1 and 100 pg mL−1 to 100 ng mL−1 with the limit of detection (LOD) of 0.21 pg mL−1 and 11.22 pg mL−1 by DPV and chronoamperometry, respectively. In addition, this aptasensor exhibited good reproducibility, stability and specificity. The recovery of NSE in human blood serum samples was from 89% to 131%. It provided a promising strategy for the detection of NSE in clinical diagnostics.
研究领域:
生物医学工程
·
肿瘤学
·
分析化学
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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）