Research
·
2025
·
IF 10.7
Haoxu Si,Shuai Zhang,Yaqin Ding,Chongyang Chai,Shuaishuai Zhou,Cuiping Li,Jingwei Zhang,Chunhong Gong
According to the relationship between unit size and wavelength, electromagnetic waves (EMWs) in metacomposites can be effectively absorbed through inherent loss mechanisms. However, limited loss ability has emerged as a primary obstacle to achieving efficient EMW absorption (EMWA) performance. The challenge of enhancing the attenuation of corresponding metacomposites remains important. In this study, we prepared elaborate titanium nitride/reduced graphene oxide units with controllable conductivities and sizes, which formed the microwave antireflective surface of metacomposites. This configuration contributes to improved impedance matching and reduced temperature sensitivity concerning EMWA performance. More importantly, EMWs experience repeated collisions and loss, along with multiple reflections and scattering within metacomposites. This phenomenon extends the transmission pathways of EMWs, thereby increasing additional loss capacity. Consequently, these metacomposites exhibited exceptional EMWA performance across a broad temperature range (298 to 573 K), while maintaining a low filler content of 1.0 wt% units. Henceforth, our findings not only provide an advantageous pathway for high design flexibility in EMWA but also pave the way for new research directions and possibilities regarding advanced lightweight metacomposites that optimize EMWA over an extensive temperature range.
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DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Xincheng Wang,Yingxin Yuan,Jinhao Xu,Zhen Li,Tianyi Xu,Penglin Lu,Shanshan Guan
Multifunctional flexible sensing technology has emerged as a pivotal research hotspot. However, most existing flexible sensors are constrained by single-functionality limitations and thus fail to meet the increasingly urgent demand for integrated multiparameter sensing in complex real-world scenarios. In this study, we propose a multifunctional flexible sensor based on an rGO@MXene/PDMS nanocomposite, which integrates three functionalities: high gauge factor (GF) strain sensing, precise resistive temperature sensing, and efficient photothermal conversion. These capabilities enable reliable monitoring of physiological signals, health monitoring, and localized thermal therapy. The as-fabricated flexible strain sensor exhibits exceptional performance, exhibiting a low detection limit of 0.5%, high gauge factor (GF) of 1000, broad dynamic range of 0%–400%, and excellent cycling stability over 20,000 cycles. Notably, the sensor achieves a temperature coefficient of resistance (TCR) of −1.01% °C–1, enabling sustained real-time physiological temperature monitoring for up to 1800 min. Furthermore, the sensor exhibits efficient photothermal conversion capability, achieving a rapid temperature rise (ΔT > 40 °C under 1 kW m–2) and stable heat retention, making it highly promising for localized thermal therapy. This work provides great potential to advance the development of next-generation wearable devices, smart healthcare systems, and human–machine interaction technologies.
研究领域:
材料科学
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柔性电子学
·
可穿戴传感器
·
生物医学工程
·
智能医疗
·
纳米复合材料
·
热疗
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DOI
高影响因子
Advanced Materials Technologies
·
2025
·
IF 6.2
Zherong Yu,Hailin Wang,Jingjing Luo,Zhongqi Ren,Suzhu Yu,Jun Wei
Lead-free and environmentally friendly ceramic materials have been attracted extensive attention in flexible piezoelectric devices. In this work, a series of Ce 3+ doped Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 (BCZT- x Ce 3+ ) nanowires (NWs), with different molar ratios of Ce 3+ to BCZT ( x ), are synthesized using a two-step hydrothermal reaction method with HZTO NWs as a precursor. Flexible composites are prepared by dispersing BCZT- x Ce 3+ NWs into polydimethylsiloxane (PDMS) matrix. The BCZT-0.001 Ce 3+ NWs/PDMS composite is found to have a piezoelectric coefficient ( d 33 ) as high as 223.2 pC·N −1 , which is 393% higher than that of the pure BCZT NWs/PDMS composite. The BCZT-0.001 Ce 3+ NWs/PDMS composite shows the optimal sensing properties with output open-circuit voltage and short-circuit current of 9.04 V and 53 nA, respectively, which is significantly higher than that of the BCZT NWs/PDMS composite. Moreover, the sensor features a voltage – pressure linearity in the ultra-wide pressure range of 2.22 to 155.56 kPa, with sensitivity of 0.0565 V·kPa −1 , and a good durability over 10 000 cycles. Further demonstration shows that the sensor is suitable for monitoring human motion at low-frequency such as 2 Hz, with an ultra-fast response time of ≈120 ms, making it a promising candidate for applications in the fields of human health monitoring and artificial intelligence.
研究领域:
材料科学
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压电材料
·
柔性电子学
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传感器技术
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纳米材料
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DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 9
·1680
·
IF 4.967
Qiuping He,Wei Chen,Pengfei Wang,Xiaoming Dou
Separation of dichlorobenzene (DCB) isomers with high purity by time− and energy−saving methods from their mixtures is still a great challenge in the fine chemical industry. Herein, silicalite-1 zeolites/polydimethylsiloxane (PDMS) hybrid membranes (silicalite-1/PDMS) have been successfully fabricated on the porous polyvinylidene fluoride (PVDF) supports to first investigate the pervaporation separation properties of DCB isomers. The morphology and structure of the silicalite-1 zeolites and the silicalite-1/PDMS/PVDF hybrid membranes were characterized by XRD, FTIR, SEM and BET. The results showed that the active silicalite-1/PDMS layers were dense and continuous without any longitudinal cracks and other defects with the silicalite-1 zeolites content no more than 10%. When the silicalite-1 zeolites content exceeded 10%, the surfaces of the active silicalite-1/PDMS layers became rougher, and silicalite-1 zeolites aggregated to form pile pores. The pervaporation experiments both in single-isomer and binary−isomer systems for the separation of DCB isomers was further carried out at 60 °C. The results showed that the silicalite-1/PDMS/PVDF hybrid membranes with 10% silicalite-1 zeolites content had better DCB selective separation performance than the silicalite-1/α−Al2O3membranes prepared by template method. The permeate fluxes of the DCB isomers increased in the order of m−DCB < o−DCB < p−DCB both in single-isomer and binary-isomers solutions for the silicalite-1/PDMS/PVDF hybrid membranes. The separation factor of the silicalite-1/PDMS/PVDF hybrid membranes for p/o−DCB was 2.9 and for p/m−DCB was 4.6 in binary system. The permeate fluxes of the silicalite-1/PDMS/PVDF hybrid membranes for p−DCB in p/o−DCB and p/m−DCB binary−isomers solutions were 126.2 g∙m−2∙h−1and 104.3 g∙m−2∙h−1, respectively. The thickness−normalized pervaporation separation index in p/o−DCB binary−isomers solutions was 4.20 μm∙kg∙m−2∙h−1and in p/m−DCB binary−isomers solutions was 6.57 μm∙kg∙m−2∙h−1. The results demonstrated that the silicalite-1/PDMS/PVDF hybrid membranes had great potential for pervaporation separation of DCB from their mixtures.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 40
·25101-25108
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IF 3.108
Jingfang Zhu,Liyun Wu,Jingjing Li,Bin Liu,Zhixiang Zeng
In this study, we created a robust and stable nanostructure coated on the surface of a stainless steel mesh via the electrodeposition of copper thin films and chemical modification with polydimethylsiloxane (PDMS) to enhance the mechanical durability of the stainless steel mesh surface with superhydrophobic performance. The obtained stainless steel mesh was tested by immersion in solutions of different pH values and abrasion cycling tests with sandpaper. The results showed that the coated stainless steel mesh retained excellent superhydrophobic and superoleophilic properties. Using the superhydrophobic and superoleophilic stainless steel mesh, we achieved the recycling of oil automatically and continuously via a vacuum pump.
研究领域:
材料科学
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环境工程
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表面化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiale Zhou,Kunquan Li,Zhuohan Chen,Xiaojing Su,Huali Xie,Lei Yao,Yunhui Wu,Xiaofan Zhang,Lu Chen,Xuting Wu,Wenjian Wu
Functional membranes with electrothermal/photothermal effects are considered an effective method for separating water/viscous crude oil mixtures. However, the loading of photothermal and electrothermal particles in polymeric membranes with poor compatibility will deteriorate the membrane performance, leading to the unstable photothermal/electrothermal effects. Therefore, we prepared a hydrophobic sandwich structure polyvinylidene fluoride/reduced graphene oxide/polydimethylsiloxane (PVDF/rGO/PDMS) composite membrane using a two-step electrospinning process, which improved the binding force between the photothermal/electrothermal particles and the matrix with the composite membrane exhibiting super fast electric heating and photothermal effect. The temperature of the composite membrane surface rapidly reached to 162.5 °C within 30 s at 25 V. In addition, the addition of graphene (GO) improved the mechanical properties of the composite membrane. Meantime, the composite membrane possessed stable hydrophobicity and lipophilicity, which was beneficial for separating water/viscous crude oil mixtures. Owing to the controllable pore structure and special wetting behavior, the water-in-oil emulsion was successfully separated. Importantly, the separation rates of the water/crude oil mixtures under the electrothermal effect was 2340 kg·m −2 ·h −1 ·bar −1 . Thus, this study provides a new method for preparing hydrophobic sandwich-like PVDF/rGO/PDMS composite membrane with electrothermal/photothermal effects, which has significant potential for engineering applications in high-viscosity crude oil removal and water-in-oil emulsion separation.
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高影响因子
Nano Research
·
2023
·Vol. 16
·期 5
·7810-7819
·
IF 9.9
Zheng Nan,Liu Jie,Wang Guoqing,Yao Pan,Dang Lihong,Liu Ze,Lu Jiufu,Li Wenge
Polydimethylsiloxane containing methacryloyloxy and methoxy silane groups (MAPDMS)-microcapsule-SiO 2 (MPMS) functional materials were prepared by constructing micro-nano hierarchical structures on the surface of MAPDMS matrix. Herein, MAPDMS@1,1-stilbene-modified hydrolyzed polyglycidyl methacrylate/graphene oxide/dimethyloctadecyl[3-(trimethoxysilyl) propyl]ammonium chloride (MAPDMS@PGMA m /GO/QC18) self-healing microcapsules with compact multi-shell structure were synthesized and combined with nano-SiO 2 to construct the hierarchical structures. Furthermore, ultraviolet (UV)/moisture dual curing mode was introduced into deep curing reaction and efficient self-healing reaction of the MPMS. The results show that the introduction of UV/moisture dual curing mode and micro-nano hierarchical structure gives MPMS functional materials excellent mechanical properties, antifouling properties, self-healing properties, and antibacterial properties. The shear strength and tensile strength of MPMS increase from 3.32 and 4.26 MPa of MAPDMS to 3.81 and 5.06 MPa, respectively. Its static contact angle increases from 115.9° of MAPDMS to 156.5°, and its slide angle decreases from 68.5° of MAPDMS to 7.8°, respectively. The antifouling performance of MPMS against seawater, soy sauce, juice, coffee, protein, and other contaminants is effectively improved compared with MAPDMS matrix. At the same time, the tensile strength and elongation at break of MPMS after healing reach 98.22% and 96.57% of those in original state, respectively. In addition, the antibacterial rates of MPMS against Escherichia coli and Staphylococcus aureus reach 99.85% and 100%, respectively. The MPMS prepared in this paper is expected to be widely used in marine antifouling, pipeline network, anti-icing, microfluidics, wearable devices, medical devices, electrochemical biosensors, and other fields.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Ange Nsilani Kouediatouka,Qi Liu,Fagla Jules Mawignon,Wei Wang,Jiawei Wang,Chunbiao Ruan,Kanfolo Franck Herve Yeo,Guangneng Dong
In this paper, a polymer blend labeled PDMS/Ecoflex (PE) was fabricated using Polydimethylsiloxane (PDMS) and Ecoflex 00-30 in various proportions. An innovative carbon nanotube/carbon black (CNT/CB) hybrid filler reinforced cetyltrimethylammonium bromide (CTAB) surfactant was prepared and sprayed to obtain CNT/CB/PE composite material. The resulting PE blend matrix showed excellent mechanical properties, including high stretchability of nearly 500% strain, minimal hysteresis, and reduced friction by up to 75% with decreasing wear. These properties were attributed to the combined effect of Young’s modulus, stiffness, and hardness of PDMS and Ecoflex. Additionally, three types of contacts CNT-CB, CB-CB, and CNT-CNT were produced by the favorable interaction of CNT and CB particles, stabilizing the sensor signal. The CNT/CB/PE sensor had an improved wear resistance, conductivity stabilization, stretchability, gauge factor during the tensile test, and strain-dependent sensitivity across a broad range of fixed strains (up to 100% strain). Furthermore, the sensor was attached to various human body joints to track the related human motions, proving the fascinating perspective in detecting various human movements and making it appropriate for application in multifunctional wearable devices in hostile environments.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xiaojian Li,Lijun Li,Yangzhi Wang,Xuehui Hao,Changzheng Wang,Zhenshan Yang,Hefu Li
The large-area fabrication of flexible and transparent surface-enhanced Raman scattering (SERS) substrates with high performance by a facile and efficient method is still challenging. Here, we demonstrated a large-scale, flexible and transparent SERS substrate composed of PDMS nanoripple array film decorated with silver nanoparticles (Ag NPs@PDMS-NR array film) prepared by a combination of plasma treatment and magnetron sputtering. The performances of SERS substrates were characterized by rhodamine 6G (R6G) using a handheld Raman spectrometer. The optimal Ag NPs@PDMS-NR array film exhibited high SERS sensitivity, with a detection limitation of R6G reaching 8.20 × 10 −8 M as well as excellent uniformity (RSD = 6.8%) and batch-to-batch reproducibility (RSD = 2.3%). In addition, the substrate showed outstanding mechanical stability and good SERS enhancement by backside illumination, thus it was suitable for in situ SERS detection on curved surfaces. The detection limit of malachite green on apple and tomato peels was 1.19 × 10 −7 and 1.16 × 10 −7 M, respectively, and quantitative analysis of pesticide residues could be realized. These results demonstrate that the Ag NPs@PDMS-NR array film has great practical potential in rapid in situ detection of pollutants.
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PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Shixue He,Jian Wu,Benlong Su,Shouyao Liu,Youshan Wang
Introducing microstructure on the surface or porous structure inside of dielectric layer can improve the sensitivity and monitoring range of the flexible pressure sensor . However, developing pressure sensors with high sensitivity in the high-pressure range is challenging because of the trade-off between sensitivity and linearity of pressure. Here, we report a design approach based on the collaboration of double structure and electrical characteristics that can improve sensor sensitivity at high pressure. The surface microstructural and internal porous structure of the dielectric layer provide a more comprehensive deformation range for the sensor from a mechanical perspective. The effects of the conductive carbon nanotube (CNT) content between two structures on the overall electromechanical characteristics of the sensor were studied. This collaborative (structure and component) design can effectively increase the monitoring range of the sensor and accomplish “gear shifting” of the sensitivity by the non-uniform distribution of CNT in the structure. The optimized capacitive pressure sensor exhibits outstanding sensitivity over a wide monitoring range (1.17 kPa −1 in the 0−100 kPa, 0.49 kPa −1 in the 100−350 kPa, and 0.23 kPa −1 in the 350−1000 kPa), and fast response capability (30 ms). The pressure sensor has excellent integrated sensing performance in rubber wheels' static/dynamic pressure monitoring, demonstrating application potential in high-pressure fields.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tiantian Du,Jun Niu,Leyao Wang,Jintao Bai,Shengxing Wang,Shijie Li,Yongzhe Fan
Daytime radiative cooling technology can release heat into outer space without consuming any electricity during the day while reflecting as much solar radiation as possible. This characteristic gives radiative cooling materials considerable application potential in the fields of energy-saving buildings, fabrics, and photovoltaic cells. The radiative cooling coating (RC coating) applied to a building should cover a large area of the building surface, so a RC coating was prepared by spraying. The RC coating consisted of highly near-infrared reflective yttrium oxide (Y2O3), titanium dioxide (TiO2), and polydimethylsiloxane (PDMS). The RC coating could reach a high solar reflectance of 92.2% and a high atmospheric window emissivity of 94.9%. The complementary reflectivity of TiO2 and Y2O3 was the key to obtaining high reflectivity for RC coatings. The results of field tests showed that the cavity where the RC coating is cooled was 7.7 °C lower than the ambient temperature under direct sunlight. Moreover, the average radiative cooling power of the RC coating was 72.5 W/m2 on a hot summer day. In addition, the RC coating has good stability and thus can be used in various conditions, such as on outdoor buildings.
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PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 22
·8078-8078
·
IF 3.748
Xi Zhang,Jianan Song,Jiajia Meng,Kan Zhang
The development of polymer-based composites with a high thermal conductivity and electromagnetic interference (EMI) shielding performance is crucial to the application of polymer-based composites in electronic equipment. Herein, a novel strategy combining ice-templated assembly and stress-induced orientation was proposed to prepare polydimethylsiloxane (PDMS)/alumina/carbon fiber (CF) composites. CF in the composites exhibited a highly oriented structure in the horizontal direction. Alumina was connected to the CF, promoting the formation of thermal conductive pathways in both the horizontal and vertical directions. As the CF content was 27.5 vol% and the alumina content was 14.0 vol%, the PDMS/alumina/CF composite had high thermal conductivities in the horizontal and vertical directions, which were 8.44 and 2.34 W/(m·K), respectively. The thermal conductivity in the horizontal direction was 40.2 times higher than that of PDMS and 5.0 times higher than that of the composite with a randomly distributed filler. The significant enhancement of the thermal conductivity was attributed to the oriented structure of the CF and the bridging effect of alumina. The PDMS/alumina/CF composite exhibited an excellent EMI shielding effectiveness of 40.8 dB which was 2.4 times higher than that of the composite with a randomly distributed filler. The PDMS/alumina/CF composite also exhibited a low reflectivity of the electromagnetic waves. This work could provide a guide for the research of polymer-based composites with a high thermal conductivity and an EMI shielding performance.
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高影响因子
危险品化学品经营许可证（带存储）