Biomimetics
·
2022
·Vol. 7
·期 4
·248
·
IF 3.743
Pan Cao,Huming Wang,Mingyi Zhu,Yifeng Fu,Chengqing Yuan
Any surface immersed in sea water will suffer from marine fouling, including underwater sound absorption coatings. Traditional underwater sound absorption coatings rely heavily on the use of toxic, biocide-containing paints to combat biofouling. In this paper, an environmentally-friendly nanocomposite with integrated antifouling and underwater sound absorption properties was fabricated by adopting MWCNTs-COOH and SiO2into PDMS at different ratios. SEM, FTIR and XPS results demonstrated MWCNTs were mixed into PDMS, and the changes in elements were also analyzed. SiO2nanoparticles in PDMS decreased the tensile properties of the coating, while erosion resistance was enhanced. Antibacterial properties of the coatings containing MWCNTs-COOH and SiO2at a ratio of 1:1, 1:3, and 1:5 reached 62.02%, 72.36%, and 74.69%, respectively. In the frequency range of 1500–5000 Hz, the average sound absorption coefficient of PDMS increased from 0.5 to greater than 0.8 after adding MWCNTs-COOH and SiO2, which illustrated that the addition of nanoparticles enhanced the underwater sound absorption performance of the coating. Incorporating MWCNTs-COOH and SiO2nanoparticles into the PDMS matrix to improve its sound absorption and surface antifouling properties provides a promising idea for marine applications.
研究领域:
材料科学
·
海洋工程
·
环境科学
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 8
·1173
·
IF 4.7
Yunkai Wang,Danlei Jing,Zikai Xiong,Yongqing Hu,Wei Li,Haotian Wu,Chuan Zuo
With the development of microelectronics products with high density and high power, it is urgent to improve the electrical and thermal conductivity of electronic paste to achieve the new requirements of packaging materials. In this work, a new synthesis method of Ag-MWCNTs was designed: Firstly, carboxylated MWCNTs and stannous chloride were used as raw materials to prepare high-loading-rate Sn-MWCNT composite material to ensure the high loading rate of metal on the MWCNT surface. Then, Ag-MWCNT composite material was prepared by the chemical displacement method to solve the problem of the low loading rate of silver nanoparticles on the MWCNT surface. On the basis of this innovation, we analyzed and compared the electrical, thermal, and mechanical properties of Ag-MWCNT composite electronic paste. Compared with the electronic paste without adding Ag-MWCNTs, the resistivity was reduced by 77%, the thermal conductivity was increased by 66%, and the shear strength was increased by 15%. Therefore, the addition of Ag-MWCNTs effectively improves the electrical, thermal, and mechanical properties of the paste, making it a promising and competitive choice for new packaging materials in the future.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Chunyang Liu,Yanrong Cheng,Delan Ge,Ju Xie,Xia Guo
Aqueous two-phase systems (ATPS) are considered a new type of green separation system, but their low selectivity to target molecules limits their practical application. In this study, we used surfactant@MWCNT as an adjuvant to improve the selectivity of PEG/(NH4)2SO4 ATPS. The surfactants used include Triton X-100 (TX-100), Tween 80, sodium dodecyl sulfate (SDS), sodium dodecyl benzenesulfonate (SDBS), and bis(2-ethylhexyl)sulfosuccinate sodium salt (AOT). Nine aromatic compounds, including syringic acid, vanillin, tryptophan, phenylalanine, tyrosine, mandelic acid, theophylline, theobromine, and cephalexin, were selected as model extracts. The results showed that the use of the surfactant@MWCNT composite as an adjuvant significantly improved the selectivity of the ATPS toward syringic acid among the nine extracts. Moreover, the selectivity of the ATPS for syringic acid with the TX-100/MWCNT composite as the adjuvant is better than that with the Tween 80/MWCNT composite as the adjuvant, followed by that with the anionic surfactant/MWCNT composite as the adjuvant. The enhanced selectivity of ATPS by the surfactant/MWCNT composite is ascribed to the spatial effect and the electrostatic and hydrophobic interactions between the extract and the surfactant adsorbed on the MWCNT.
研究领域:
化学工程
·
分离科学
·
纳米技术
·
环境科学
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产品关联
DOI
PubMed
高影响因子
Nano Futures
·
2022
·Vol. 6
·期 2
·025001
·
IF 4.07
Yu-Ting Wang,Ze-Zhi Zhang,Ming-Xue Li
Two-dimensional transition metal dichalcogenides are regarded as the ideal hosts for zinc-ions. Herein, a facile hydrothermal method is proposed to fabricate the metallic phase (1T phase) MoS2/multi-walled carbon nanotube (MWCNT) hybrids serving as the cathode materials for zinc-ion batteries (ZIBs). By virtue of the exertion of phase engineering and the synergy between the 1T MoS2 nanosheets and MWCNT framework, the transfer kinetics of zinc-ions of the prepared hybrid are remarkably accelerated, leading to boosted electrochemical properties at both room temperature and low temperatures. The hybrid electrode delivers a high reversible capacity of 161.5 mAh g−1 after 100 cycles at 0.1 A g−1, and good cycling stability with a desired capacity retention of 84.6% over 500 cycles at 1 A g−1. Furthermore, its boosted capability of zinc-ion storage in a low-temperature atmosphere is revealed. This work not only provides an effective way to squeeze the values of phase engineering of MoS2 in ZIBs, but also reveals the great potential of MoS2-based composites in low-temperature energy storage devices.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Shingping Zhou,Pingxin Ge,Yu Zhang,Zhong Wang,Xin Yi,Qing Zheng,Wei Ma,Gebo Pan,Shaohui Zhang
Osteocalcin, a key biomarker of bone metabolism, is of significant clinical value for the diagnosis and management of osteoporosis through dynamic monitoring. The development of highly sensitive detection methods is therefore of great importance. This study developed a highly sensitive electrochemical immunosensor for osteocalcin detection based on a nanocomposite of carboxylated multi-walled carbon nanotubes (MWCNT-COOH), polyvinyl alcohol (PVA), and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). A uniform and stable nanocomposite film was prepared via a simple and rapid method involving physical blending and vortex dispersion. Osteocalcin (OC) antibodies were covalently immobilized onto the surface of a functionalized screen-printed electrode using an EDC/NHS coupling system. The detection principle relies on the specific antigen-antibody binding event hindering interfacial electron transfer, enabling the quantitative detection of OC via differential pulse voltammetry (DPV). Under optimal conditions, the sensor exhibited an excellent linear response (R² = 0.996) over a concentration range from 10 pg/mL to 100 μg/mL, with a detection limit of 1.2 pg/mL. Furthermore, the sensor demonstrated outstanding selectivity, reproducibility, and stability, showcasing its potential as a promising tool for the quantitative analysis of bone metabolism biomarkers in biological fluids.
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高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 6
·3379-3390
·
IF 4.21
Zhang Yi,Zheng Xudong,Bian Tingting,Zhang Yuzhe,Mei Jinfeng,Li Zhongyu
Abstract The purpose of the paper is to achieve adsorption and secondary application of La(III) through strong coordination ability of phosphate groups and La(III). Firstly, cellulose nanocrystals (CNCs) were phosphorylated in two solvents (water and molten urea). p-CNC(water)/MWCNT and p-CNC(urea)/MWCNT thin films were successfully synthesized by using p-CNCs as film units based on EISA method. The addition of multi-wall carbon nanotube was to improve thermal stability and repeatability of films and carboxyl groups thereon could also involve in the coordination of La(III). Adsorption experiments show that, at pH 4.0, adsorption capacities of p-CNC(water)/MWCNT and p-CNC(urea)/MWCNT films were 21.23 and 44.71 mg g −1 , with half equilibrium time ( t 1/2 ) of 23.06 and 4.87 min. Repeatability tests show that the adsorption capacities of films remained above 82% of the maximum adsorption capacities after five adsorption–desorption cycles. Graphic abstract
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 2
·1193-1204
·
IF 6.123
Ma Hongliang,Liu Zhuqing,Lou Jiang,Ding Qijun,Jiang Yifei,Li Xia,Han Wenjia
As a human-computer interaction technology for the Internet of Things (IoT), non-contact humidity sensors have been widely explored. However, traditional humidity sensors have become a bottleneck in the development of flexible electronics owing to their complex processes and non-degradability. Here, bacterial cellulose (BC) and MWCNT were sequentially coated on paper to construct a durable and highly sensitive bacterial cellulose/MWCNT humidity sensor (BCNT). The BC endows the paper substrate with dense structure and significantly reduces the consumption of active materials (6.7 times reduction). Further, the well-dispersed CNT coating forms an interlocking structure with the BC nano-network, which results in a high mechanical strength (66.3 MPa). The maximum response of BCNT02 can be up to 94.5% (− ΔI/I 0 ) under 98% RH, and the response and recovery times were 150 and 297 s, respectively. Moreover, the high humidity sensitivity of the BCNT make it an excellent choice for research and development of humidity sensors for respiration detection, non-contact switching and humidity localization.
研究领域:
材料科学
·
电子学
·
传感器
·
物联网(IoT)
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DOI
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 33
·期 12
·2406-2416
·
IF 3.223
Yao Wang,Yang Zhang,Yuedan Wang,Rufeng Zhu,Yuanli Chen,Xue Liu,Jia Xu,Mufang Li,Dong Wang
A cotton yarn biosensor based on electrochemical transistor functionalized with MWCNT and PANI was developed for the detection of urea. The transistors based on PANI/MWCNT/cotton yarns under optimized MWCNT concentration has been obtained, which exhibited high on/off current ratio, fast response time, and good operational stability. A transistor-based urea sensor was prepared from PANI/MWCNT/cotton yarns, which could monitor urea in the 1 nM–1 mM linear range with the correlation coefficient of 0.9716. Furthermore, the sensor showed superior reproducibility and high specificity. The practical applications of the proposed sensor were also confirmed. These results indicate the flexible transistor can be used as an efficient platform for biological detection in body fluids.
研究领域:
生物医学工程
·
材料科学
·
分析化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Pascal Habimana,Yanjun Jiang,Jing Gao,Jean Bernard Ndayambaje,Osama M. Darwesh,Jean Pierre Mwizerwa,Xiaobing Zheng,Li Ma
The continuous use of chemical dyes in various industries, and their discharge into industrial effluents, results in severe problems to human life and water pollution. Laccases have the ability to decolorize dyes and toxic chemicals in industrial effluents as green biocatalysts. Their possible industrial applications have been limited by poor reusability, low stability, and loss of free laccase action. In this research, laccase was immobilized on zeolitic imidazolate framework coated multi-walled carbon nanotubes (Laccase@ZIF-8@MWCNTs) via metal affinity adsorption to develop an easy separable and stable enzyme. The optimum reaction conditions for immobilized laccase are at a pH of 3.0 and a temperature of 60 °C. The immobilized laccase was enhanced in storage and thermal stability. The results indicated that Laccase@ZIF-8@MWCNTs still maintained 68% of its original activity after 10 times of repeated use. Most importantly, the biocatalytic system was applied for decolorization of different dyes (20 mg·L −1 ) without a mediator, and up to 97.4% for Eriochrome black T and 95.6% Acid red 88 was achieved in 25 min. Biocatalysts with these properties may be used in a variety of environmental and industrial applications.
研究领域:
环境科学
·
生物技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Jianwei Zhou,Zhongxun Yu,Yarong Lv,Ce Wang,Ping Hu,Yong Liu
The development of modern microelectronic devices and chip integration cause electronics devices to generate excessive heat. To overcome such challenges in the near future, designing thermally conductive composites with improved stability, conductivity, and excellent electric insulation properties is critical. In this study, a novel strategy was proposed to construct superior thermally conductive networks with boron nitride nanosheets-Multiwalled carbon nanotubes (BNNS-MWCNT)/ poly(vinyl alcohol) (PVA) nanocomposites through the electrospinning technique and hot-pressing process. BNNS and MWCNT are aligned along with the fiber orientation , and MWCNT, with high length-to-diameter ratio characteristics, can act as a bridging point for uncontacted BNNS. Interestingly, when the mass fraction of BNNS-MWCNT was 20 % and the mass ratio between the BNNS: MWCNT was maintained as 9:1, the resultant BNNS-MWCNT/PVA nanocomposites exhibited an excellent in-plane thermal conductivity of 11.49 W/(m·K) and observed a tremendous heat dissipation capacity than PVA and BNNS/PVA composites. Moreover, the BNNS-MWCNT/PVA recorded excellent electrical insulation properties. The present work provides inspiration for the preparation of composites with low fillers and high thermal conductivity.
研究领域:
材料科学
·
热管理技术
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 4
·1-12
·
IF 2.8
Yang Qun,Zhang Run,Tian Jing,He Hailong,Xue Ping,Chen Xiaonong,Jia Mingyin
Ultra High Molecular Weight Polyethylene (UHMWPE), a captivating material, presents incomparable physical and chemical properties due to very high molecular weight and intricate crystalline process. In this study, two kinds of nano-materials, one-dimensional multi-walled carbon nanotubes (MWCNT) and two-dimensional lamellar graphene nanoplatelets (GNP), were added to UHMWPE, investigating the isothermal and non-isothermal crystallization processes of UHMWPE/nano-materials composites. Jeziorny and Mo method are all suitable for describing the non-isothermal crystallization process. Interestingly, both MWCNT and GNP did not play the role of heterogeneous nucleating agents. The crystallization activation energy of UHMWPE/nano-materials composites is slightly enlarged, proving that the addition of these two nanomaterials is unfavorable to the crystallization process. In addition, during the non-isothermal crystallization process, the neat UHMWPE exhibits a lower crystallization rate than that of samples modified by nano-materials at initial crystallization stage, and possesses a slower crystallization rate than that of samples modified by nano-materials at end crystallization stage. This phenomenon may be attributed to the fact that the incorporated nano-materials abate the number of the physical entanglement points of UHMWPE molecular chains, which weakens the restriction on the movement of molecular chains and increases the crystallization rate at the initial stage. However, the crystallization rate of the samples incorporated with nano-materials decreases rapidly with time. Besides, the Avrami exponent is about 2 in both isothermal and non-isothermal crystallization process, which may be related to the geometry of crystal growth.
研究领域:
材料科学
·
聚合物工程
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DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2025
·Vol. 99
·期 11
·2797-2808
·
IF 0.8
Guangtao Gao,Jiang Zichao,Ma Kaiyue,Chen Qizhi,Liu Huijun
Metal-organic frameworks (MOFs) are widely used as electrode materials due to their porous structure. However, their low conductivity often limits their further development. To overcome the issue, NiCo bimetallic organic framework (NiCo-MOF) and Multiwall carbon nanotube (MWCNT) were attached to Nickel foam (NF) surface without any binder by a simple one-step hydrothermal synthesis, resulting in electrodes with a regular linear layered structure. The structure promoted the electron/ion conduction and exposed more redox active sites, significantly improving electrochemical performance. The electrode prepared with Ni : Co = 1 : 2 and 2% MWCNT exhibited an areal specific capacitance of 5.94 C at 5 mA cm –2 and the capacity retention rate of 83.1% after 5000 cycles at 15 mA cm –2 . The areal-specific capacitance of the modified electrode material increased by nearly 7 times from 0.87 C to 5.94 C cm –2 . Hybrid supercapacitors (HSCs) consisting of the obtained electrodes and activated carbon (AC) had energy density up to 770 mW h cm –2 at a power density of 5.63 W cm –2 .
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DOI
高影响因子
危险品化学品经营许可证（带存储）