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
✓ 已验证
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2015
·
IF 0
Yin Yan Ding,Bi Xu,Feng Yan Ge,Zai Sheng Cai
In this work, self-cleaning cotton fabrics were prepared based on the TiO2-SiO2-Polydimethylsiloxane (PDMS) composites. TiO2-SiO2 composites were synthesized by depositing TiO2 nanocrystals onto preformed porous SiO2 and PDMS was used to enhance the linkage between TiO2-SiO2 composites and cotton fabrics. The TiO2-SiO2-PDMS composites coated cotton fabrics show superhydrophobicity with a water contact angle of 157°because of the abundant of methyl groups and hierarchical roughness features of the coated cotton fabrics. Meanwhile, the TiO2-SiO2-PDMS composites coated cotton fabrics display photocatalytic property, which were analyzed based on the removal and degradation of rhodamine B (RhB) under ultraviolet light. Abrasion resistance test indicates that the coating possesses a good mechanically durability.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Houbao Liu,Xinqing Su,Renli Fu,Binyong Wu,Xudong Chen
The flexible heat dissipation material with high thermal conductivity and electrical insulation is ideal for highly integrated flexible electronic devices. In this study, the flexible polymer composite films were prepared by spin coating process, the thermal conductivity and electrical insulation of the composite film are significantly enhanced by adding short carbon fibers (SCF) and boron nitride (BN) particles to PDMS matrix. SCF and BN particles construct an effective thermal conduction path in the PDMS matrix, while highly insulating BN particles inhibit the formation of conductive paths. The thermal conductivity of 15%SCF/20%BN/PDMS film achieved 2.29 W/m·K when 15 wt% SCF and 20 wt% BN were loaded, which was 990% enhancement compared to pure PDMS. And its volume electrical resistivity and breakdown strength reached 2.11 × 1014 Ω·cm and 12.5 KV/mm respectively, showing excellent electrical insulation property.
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
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fei Xie,Huan Liu,Minyu Bai,Shuai Wen,Fang Xu,Jijie Zhao,Weiguo Liu
Flexible electronics are usually fabricated using stretchable or foldable materials, whereas these materials have no predominance in miniaturization of high-frequency flexible electronics because of low permittivity. In effort to scale down dimensions of electronic devices, the use of ferrite ceramic/polymer matrix may offer superiority over conventional dielectric ceramics. Polydimethylsiloxane (PDMS), which exhibits high transparency and stretchability, has emerged as functional or substrate material for high-performance devices, such as RF antenna. Here, to improve high-frequency magnetic-dielectric properties of PDMS matrix, a high-performance LiZnTiMn (LZTM) ferrite is synthesized and added in the PDMS matrix. We demonstrate, through magnetic, dielectric spectra and elasticity test, a flexible 3L/PDMS composites ( f = 1.0 GHz, μ r = 2.87, ε r = 6.51, tanδ μ = 0.55, tanδ ε = 0.015) was prepared by using mechanical mixing method. Moreover, the elastic modulus and miniaturization factor (n) of the flexible composite are 16.78 MPa and 4.32@1.0 GHz, respectively. The present results provide a reference connecting flexible electronic and RF devices, and offer experience on how to enhance high-frequency performance of polymer-matrix based on ceramic material.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 32
·期 1
·430-441
·
IF 2.22
Liu Yuping,Wu Peng,Kang Peng,Li Liuyang,Shi Jinchao,Zhou Zheng,Chen Guang-xin,Li Qifang
With the development of new mobile communication systems, the composite substrate used for the wideband antennas will show a suitable dielectric constant, low dielectric loss, and good dielectric stability in a wide frequency range. In this work, a kind of dielectric filler, Sr 2+ -doped CaCu 3 Ti 4 O 12 nanowires (Ca 1− x Sr x Cu 3 Ti 4 O 12 NWs, x SCCTO NWs), was synthesized via a two-step hydrothermal method for the first time. The composites were then prepared by adding the obtained filler to polydimethylsiloxane (PDMS). Results revealed that Sr 2+ doping can significantly reduce the dielectric loss of composites and stabilize both the dielectric constant and the dielectric loss in a wide frequency range compared with those of CCTO NWs–PDMS composites. Moreover, 0.4SCCTO NWs–PDMS composites exhibit high thermal stability, tensile strength, breakdown strength, and energy density. These properties effectively broaden the frequency range of the PDMS based composites, which are very suitable for the application in flexible wideband antenna substrate materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 11
·1491
·
IF 4.7
Hongyi Zhu,Shunxia Wu,Rui Tang,Yang Li,Gang Chen,Bingxue Huang,Biyou Peng
Electronic devices play an increasingly vital role in modern society, and heat accumulation is a major concern during device development, which causes strong market demand for thermal conductivity materials and components. In this paper, a novel thermal conductive material consisting of polydimethylsiloxane (PDMS) and a binary filler system of h-BN platelets and Al2O3nanoparticles was successfully fabricated using direct ink writing (DIW) 3D printing technology. The addictive manufacturing process not only endows the DIW-printed composites with various geometries but also promotes the construction of a 3D structural thermal conductive network through the shearing force during the printing process. Moreover, the integrity of the thermal conductive network can be optimized by filling the gaps between the BN platelets with Al2O3particles. Resultingly, the configuration of the binary fillers is arranged by the shearing force during the DIW process, fabricating the thermal conductive network of oriented fillers. The DIW-printed BN/Al2O3/PDMS with 45 wt% thermal conductive binary filler can reach a thermal conductivity of 0.98 W/(m·K), higher than the 0.62 W/(m·K) of the control sample. In this study, a novel strategy for the thermal conductive performance improvement of composites based on DIW technology is successfully verified, paving a new way for thermal management.
研究领域:
材料科学
·
热管理技术
·
增材制造
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULES
·
2020
·
IF 5.918
Huitao Yu,Yiyu Feng,Long Gao,Can Chen,Zhixing Zhang,Wei Feng
Thermally conductive, robust, but self-healable polymer/carbon nanocomposites are the research focus in functional materials. However, the trade-off between molecular interaction and cross-linking makes it difficult to simultaneously achieve excellent self-healing, high strength, and thermal conduction. Herein, we fabricated boroxine poly(dimethylsiloxane) 2-ureido-4[1H]-pyrimidinone selectively cross-linked by molecular boron ester bonds and hydrogen bonds. By optimizing the reversible interaction, a maximum strength of 7.33 MPa and a high self-healing efficiency of 97.69 ± 0.33% were achieved at a boroxine-to-2-ureido-4[1H]-pyrimidinone molar ratio of 1:3 (BE-PDMS1:3-UPy). Highly robust composites of BE-PDMS1:3-UPy were obtained using a UPy-modified graphene aerogel. A transected sample recovered its mechanical properties (78.83 ± 2.40%) and thermal conductivity (98.27 ± 0.13%) after self-healing at 40 °C for 6 h. The outstanding reversible association/disassociation of hydrogen bonds at the polymer–graphene interface makes the composites to be used as structure–function integrated materials in interfacial thermal conductors.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jianan Song,Guangxing Huang,Feng Wei,Jiajia Meng,Kan Zhang
The increasing demand for high-performance strain sensors has driven the development of innovative composite systems. This study focused on enhancing the performance of composites by integrating liquid metal, carbon nanotubes, and polydimethylsiloxane (PDMS) in an innovative approach that involved advanced interface engineering, filler synergy, and in situ cross-linking of PDMS in solution. Surface modification of liquid metal with allyl disulfide and hydrogen-containing polydimethylsiloxane significantly improved its stability and dispersion within the polymer matrix. Through in situ cross-linking in solution and subsequent segment rearrangement after solvent evaporation, a continuous filler network was formed within the composite. The composites exhibited enhanced thermal stability, achieving a thermal conductivity of up to 2.13 W/(m·K) while simultaneously attaining a high electrical conductivity of 416 S/cm. The composite demonstrated excellent thermal management capabilities, alongside remarkable mechanical properties, including over 400% elongation at break and a low modulus of 0.587 MPa, even at high filler content. These attributes make the composite highly suitable for flexible strain sensor applications. Notably, the composite demonstrated outstanding strain sensing capabilities, effectively monitoring both human motion and handwriting. This work highlighted the critical roles of interface modification, filler interactions, and in situ cross-linking in achieving significant improvements in thermal, electrical, and sensing performance, thereby advancing the potential applications of flexible electronic materials.
研究领域:
材料科学
·
电子工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yongchun Li,Yesong Xu,Hongrui Liu,Hao Duan,Hong Wang
Ionized Calcium (Ca 2+ ) is the physiologically active component involved in many physiological processes such as blood coagulation, muscle contraction, neurotransmitter release, and hormone secretion. It is known that derangement in Ca 2+ level is associated with adverse outcomes and increased mortality, therefore, the dynamic and continuous monitoring of blood Ca 2+ concentrations are essential for managing patients, which can avoid consequences of delayed treatment and overcorrection in critically ill and severely injured patients. This study presents a needle-shaped Ca 2+ solid-contact ion-selective electrode (SC-ISE) utilizing a graphite-polydimethylsiloxane (Gr-PDMS, GP) composite as the transduction layer. The composite integrates the excellent conductivity and low cost of Gr with enhanced double-layer capacitance, hydrophobicity, and adhesion, making it an ideal material for ISEs. The electrode demonstrates a near-Nernstian response (28.2 mV/decade) and exceptional long-term stability (potential drift: 25 μV/h). Its performance was validated through accurate Ca 2+ detections in serum and blood, with in vivo testing on New Zealand rabbits under dynamic conditions such as fluid administration and injection, highlighting its potential for real-time clinical applications.
研究领域:
生物医学工程
·
临床检验医学
·
电化学传感器
·
重症监护
·
转化医学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Xiaosen Su,Weilin Liao,Fei Fang
Flexible piezoelectric energy harvesters (FPEHs) made of polymer-based piezoelectric composites are urgently needed for powering wearable electronics. Employing water-based freeze casting and emulsion-template method, a porous structured Barium titanate(BaTiO 3 )/PDMS composite is obtained, which combines the piezoelectric ceramics with piezoelectric electret. For the BaTiO 3 ceramic skeletons, three different pore arrangements are obtained by utilizing flat-bottomed mold, wedge-shaped mold and round-table mold. The ceramic skeletons are then encapsulated with the PDMS matrix with and without porous forming ingredient. Finite element simulation is carried out to reveal the influence of the alignment of BaTiO 3 skeleton and porous PDMS on the piezoelectric behavior. The output performance is investigated for the BaTiO 3 /PDMS composite upon a vibration exciter, as well as human motion. It is found that the BaTiO 3 skeleton with a scattered porous structure aligned in the horizontal direction, encapsulated with a porous PDMS possesses the most prominent output voltage and power, reaching 6.63 V and 26.46 μW, respectively upon a compressive load of 21 N at 8 Hz. Moreover, a smart insole based on the porous structured BaTiO 3 /PDMS piezocomposites with both energy harvesting and posture recognition functions is constructed. The open-circuit voltage of the smart insole reachs 40 V in jumping states, and can successfully power an alarm clock. The study offers a new approach for designing of the flexible piezoelectric composites for applications in energy harvesting and posture recognition.
研究领域:
材料科学
·
能源技术
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 6
·2000126
·
IF 7.527
Hanjin Jiang,Hairui Fang,Dong Wang,Jianbo Sun
Due to its promising potential applications in seawater desalination and purification, solar steam conversion has attracted tremendous attention recently. The light-to-heat conversion capacity of solar absorbers directly affects the rate at which freshwater is produced by the evaporation system. Herein, an efficient double-layer evaporator is developed using MoS 2 /LaF 3 /PDMS ink as an absorber that is printed onto a commercial PTFE membrane by the controlled ink-spray method. The LaF 3 nanoparticles-decorated MoS 2 nanoflowers nanocomposite exhibits enhanced adsorption of sunlight due to semiconductor/solid electrolyte interface synergetic effect-induced broadband absorption ability. Combining the advantages of local heating and rapid vapor emission, the water evaporation rate of the evaporator with spray ink in sunlight is 1.76 kg m −2 h −1 and the corresponding high light-to-heat conversion efficiency is 91%. Also, the membrane module has good operability, certain mechanical strength, and good long-term stability. The synergistic effect of a rare-earth solid electrolyte and semiconductor provides new ideas for the design and development of materials with high light-to-heat conversion efficiency and good thermal stability.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Minghui Xu,Xuechun Yang,Xue Yang,Yuanhao Zhou,Guoxue Pan,Wanli Shang,Qingwen Tan,Zhan Xu,Guangda Niu,Jianjun Dong,Yukun Li,Zhenghua Yang,Feng Wang,He Feng,Jingtai Zhao,Kuan Ren,Qianli Li
Cesium manganese bromide metal halide has great potential in the field of X-ray imaging and anti-counterfeiting due to its excellent optoelectronic properties. Here, Cs 3 MnBr 5 was successfully prepared by a simple method. Uniquely a novel phenomenon based on H 2 O induced color change was discovered, Cs 3 MnBr 5 can recover from aqueous solution more than 10 times under heating, which can be used in fluorescent anti-counterfeiting applications. Furthermore, Cs 3 MnBr 5 @PDMS, prepared by the PDMS composite strategy, has been demonstrated to exhibit a stability that is 20 times greater than that of Cs 3 MnBr 5 . Simultaneously, the light yield of Cs 3 MnBr 5 is evaluated to be 21688 photons/MeV. Furthermore, it has been successfully applied in non-destructive detection and biological imaging and the spatial resolution can be restored to 10 lp mm −1 .
研究领域:
材料科学
·
光电技术
·
成像技术
✓ 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）