Polymers
·
2019
·Vol. 11
·期 3
·526
·
IF 3.164
Jiayun Chen,Xiaoying Xiong,Qilong Zhang,Lingling Shui,Shitao Shen,Hui Yang,Zhicai Zhu,Fang Zhang
P(VDF-TrFE) (vinylidene fluoride-co-trifluoroethylene)/PMMA (PVT/PMMA) blended films synthesized through a facile solution-blending method show outstanding performance for practical electrowetting and energy storage applications. The van der Waals forces and dipolar interactions in neighboring P(VDF-TrFE) and PMMA chains, together with the suppressed free volume (or defect) are critical to the significantly-enhanced electrical properties. Typical, Teflon-covered P(VDF-TrFE)/PMMA blended film exhibits a high dielectric constant of 13 with low dielectric loss (~0.05) at 100 Hz and a large initial contact angle of 122°. Its electrowetting response with a contact angle modulation of 50° in air and low contact angle hysteresis demonstrate that it is promising for low-voltage electrowetting applications. Furthermore, with an energy density of 11.8 J/cm3, approximately double that of pure P(VDF-TrFE), PVT/PMMA blended films containing 20 wt % PMMA turn out to be superior materials for energy storage applications, due to their significantly-enhanced polarization and reduced remnant polarization.Keywords:electrowetting;energy storage;dielectric constant;hydrophobicity
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Sujian You,Chang Liu,Huiqing Liu,Xiaolei Yu,Shasha Li,Wei Liu,Shishang Guo,Xingzhong Zhao
In this work, one-dimensional (1D) multiferroic BiFeO 3 (BFO) and poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] composite nanofibers are fabricated by using a two-step sol–gel based electrospinning method . X-ray diffraction (XRD) study reveals that crystalline phases corresponding to both BiFeO 3 and P(VDF-TrFE) are found. Microstructure measurement shows that the nanofibers are alignment and BFO nanorods are well-dispersed in the P(VDF-TrFE) fiber matrix. The coexistence of electric and magnetic hysteresis for the composite materials also has been observed successfully at room temperature. It indicates that such nanofibers would perform a wide range of potential applications in flexibility information storage, magnetic recording media , spintronics devices and sensors.
研究领域:
材料科学
·
纳米技术
·
多铁性材料
·
聚合物复合材料
·
自旋电子学
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 20
·5083
·
IF 3.1
Wen Huang,Caiyuan Liu,Xin Fang,Hui Peng,Yonggang Yang,Yi Li
This work presents a facile way to fabricate a polymer/ceramics composite gel electrolyte to improve the overall properties of lithium-ion batteries. Lithium salt-grafted silica was synthesized and mixed with P(VDF-HFP) to produce a nanofiber film by the electrostatic spinning method. After coating a layer of SiO2onto the surface of nanofibers through a sol-gel method, a composite nanofiber film was obtained. It was then immersed in plasticizer until saturation to make a composite gel electrolyte film. Electrochemical test results showed that the obtained gel electrolyte film shows high thermal stability (~450 °C), high ionic conductivity of 1.3 × 10−3S cm−1at 25 °C and a lithium-ion transference number of 0.58, and superior cycling stability, providing a new direction for manufacturing secondary batteries with higher safety and performance.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 73
·69580-69585
·
IF 3.289
Xingrong Xiao,Nuoxin Xu,Yongchang Jiang,Qilong Zhang,Enjie Yu,Hui Yang
Ag-loaded TiO2 hybrid particles (TiO2@Ag) were synthesized as fillers by using an ethylene glycol reduction method. Based on this, the TiO2@Ag/P(VDF-HFP) hybrid films were prepared by embedding TiO2 nanoparticles in a poly(vinylidene fluoride-co-hexafluoropropylene) [P(VDF-HFP)] matrix. Morphology and thermal analysis show that the introduction of TiO2@Ag does not disrupt the continuity of the polymer matrix, while the strong interaction between fillers and matrix influences the crystallization process of the composite. The adhesion of Ag to TiO2 efficiently separates the Ag particles from connecting and suppresses the formation of a conductive network, and the ultra-small Ag nanoparticles “trap” the carriers due to coulombic blockade and quantum confinement effect, which results in low dielectric loss and electrical conductivity of the composites. As a consequence, the dielectric permittivity of polymer nanocomposites was enhanced by 300% over the P(VDF-HFP) matrix at a filler content of 30 vol% while maintaining a rather low dielectric loss (0.037 at 1 kHz), demonstrating promising applications in electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 16
·4576-4587
·
IF 7.59
Jiamin Zhang,Xuzhao He,Zhiyuan Zhou,Xiaoyi Chen,Jiaqi Shao,Donghua Huang,Lingqing Dong,Jun Lin,Huiming Wang,Wenjian Weng,Kui Cheng
Piezoelectric poly(vinylidene fluoride-trifluoroethylene) has demonstrated an ability to promote osteogenesis, and biomaterials with a chirality-patterned topological surface could enhance cellular osteogenic differentiation. In this work, we created a chirality-patterned surface potential distribution of CoFe2O4/poly(vinylidene fluoride-trifluoroethylene (CFO/P(VDF-TrFE)) membranes to explore their osteogenic response under no change in surface chemical and topology, attempting to further strengthen the ability of the membranes to promote osteogenesis. The chirality-patterned surface potential distribution was established by microdomain contact polarization with the help of sinistral/dextral-patterned ITO interdigital microelectrodes. In the in vitro evaluations, the mesenchymal stem cells showed a positive response in osteogenic differentiation to CFO/P(VDF-TrFE) membranes with both sinistral- and dextral-patterned surface potential distributions, however, the dextral-patterned distribution gave a stronger response than the sinistral-patterned one. And the in vivo evaluation showed a response tend in new bone tissue formation similar to the in vitro evaluations. The stronger response in osteogenic differentiation and osteogenesis for the CFO/P(VDF-TrFE) membrane with the dextral-patterned distributions may be attributed to that the intense interaction of the cells with the electrophysiological microenvironment appears due to a correspondingly higher expression of integrin α5β1, which significantly up-regulates the Arp2/3 complex expression, a crucial factor for cytoskeleton reorganization, possibly increases cytoskeleton contractility, and strengthens the transduction of the osteogenesis-related signaling cascade. This work proves that the chirality-patterns in surface potential distributions could provide an osteogenic response similar to a chirality-patterned topological surface.
研究领域:
生物材料
·
组织工程
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 15
·1808415
·
IF 15.621
Fengren Cao,Wei Tian,Linxing Meng,Meng Wang,Liang Li
Flexible and self-powered perovskite photodetectors attract widespread research interests due to their potential applications in portable and wearable optoelectronic devices. However, the reported devices mainly adopt an independent layered structure with complex fabrication processes and high carrier recombination. Herein, an integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite bulk heterojunction film photodetector on the polyethylene naphthalate substrate is demonstrated. Under the optimum treatment conditions (the polarization voltage and time, and the concentration of P(VDF-TrFE)), the photodetector exhibits a largely enhanced performance compared to the pristine perovskite device. The resulting device exhibits ultrahigh performance with a large detectivity (1.4 × 10 13 Jones) and fast response time (92/193 µs) at the wavelength of 650 nm. The improved performance is attributed to the fact that the polarized P(VDF-TrFE)/perovskite hybrid film provides a stronger built-in electric field to facilitate the separation and transportation of photogenerated carriers. These findings provide a new route to design self-powered photodetectors from the aspect of device structure and carrier transport.
研究领域:
光电子学
·
材料科学
·
柔性电子学
·
光电探测器
·
铁电材料
·
钙钛矿太阳能电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Qiao Huang,Hang Luo,Chao Chen,Xuefan Zhou,Kechao Zhou,Dou Zhang
Dielectric capacitors are of urgently demand in modern micro-electric industry. The surface modified inorganic filler introduced to polymer matrix represents a promising avenue for the dielectric material's enhancement of energy storage density. To ease the electric field concentration of the composite induced by permittivity difference between ceramic fillers and polymer matrix, the specific dielectric fillers of TiO 2 nanowires modified BT particles were synthesized in this study. Gradient dielectric composite consisting of poly(vinylidene fluoride-co-hexafluoropylene) [P(VDF-HFP)] matrix ( ε r ∼10), TiO 2 shell ( ε r ∼40), and BaTiO 3 (BT) core ( ε r ∼1000) were focused to investigate the electric field contribution and interface polarization. The results revealed that the permittivity of the composites increased as a result of large interfacial polarization induced by the large specific surface area of the nanowires as compared to the composite with randomly mixed TiO 2 /BT fillers. The breakdown strength of the composite was slightly improved with 20 vol% fillers, attributed to the fact that the electric field intensification was weakened by the BT@TiO 2 /Dop gradient dielectric fillers. The composite could endure up to 10 6 times of field cycling at the applied cycling field and the leakage current density was rather low. The composites with 20 vol% fillers exhibited a discharged energy density of 2.8 J/cm 3 at a low electric field, which was much higher than that of the neat P(VDF-HFP). The findings of this research introduced a new inorganic particle with large specific surface area and gradient dielectric permittivity as filler in composite for energy storage application.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 16
·14161-14169
·
IF 2.324
Xiong Xiaoying,Zhou Zhou,Zhang Zhao,Yang Hui,Zhang Qilong
In this study, rod-like TiO 2 filler was synthesized one-step hydrothermal method and was incorporated into P(VDF-TrFE-CFE) polymer matrix to obtain composites with high dielectric constant. It is found that the morphology and content of TiO 2 fillers play a vital role in tailoring the performance of the as-fabricated composites. The rod-like TiO 2 assembled by numerous nanoparticles maintained its primary shape and homogenously distributed in the matrix, thus achieved sophisticated interface and strong interfacial adhesion with P(VDF-TrFE-CFE) polymer, which together contributed to a dramatic improvement in permittivity of composites. Typically, the dielectric constant of composite with 10 vol% rod-like TiO 2 reaches 160 at 100 Hz, in contrast to 102.5 for the composite with 10 vol% commercial TiO 2 and 47 for pristine P(VDF-TrFE-CFE). This study provides a solution for obtaining high-k dielectric composites with low dielectric loss, which is highly desired for advanced electronic devices.
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
Coatings
·
2022
·Vol. 12
·期 12
·1947
·
IF 3.236
Qin Luo,Xuzhao He,Xiyue Duan,Haoqing Liu,Zhiyuan Zhou,Kui Cheng
Bone repair and regeneration have aroused widespread interest due to their potential usefulness in cases when bone self-healing is insufficient. In this work, a Poly(vinylidene fluoride-trifluoroethylene)-coated-Poly methyl methacrylate Janus membrane was prepared, where a P(VDF-TrFE) coating on a PMMA film serves as Janus-A to mediate cell growth behavior, owing to its electroactivity, and the PMMA film serves as Janus-B to inhibit soft-tissue growth. A P(VDF-TrFE) coating separated from the substrate was put above the PMMA film before the PMMA film had dried completely, and a Janus membrane formed because of the flowability and adhesion of the nonvolatile PMMA solution. Their bonding could withstand the pressure of the body fluids in the shear direction. Various crystallization substrates were also applied to modulate the P(VDF-TrFE) coating’s surface potentials, as the surface potential would further affect cellular response. It was also found that the responses of the bone marrow mesenchymal stem cells (BMSCs) and bone marrow macrophages (BMDMs) could be adjusted through surface potential modification. Such a Janus membrane could potentially be applied to a biological environment with the effect of both guiding bone regeneration and preventing soft tissue adhesion.Keywords:Janus membrane;P(VDF-TrFE);PMMA;bone tissue regeneration
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Zhiyuan Zhou,Jiamin Zhang,Xiyue Duan,Weiming Lin,Yang Yi,Wenjian Weng,Kui Cheng,Zuobing Chen
Graphene (Gr)/poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) composite films were annealed by the photothermal effect that produced between near-infrared laser and graphene. Raman spectra, X-ray Diffraction (XRD), Fourier-Transformed Infrared Spectroscopy (FTIR), Differential scanning calorimetry (DSC) are used to characterize the crystalline state of Gr/P(VDF-TrFE) films. Further, piezoelectric coefficient d 33 were to test polarization performance. Finally, the Bovine serum albumin (BSA) adsorption shows that annealing and polarization of Gr/P(VDF-TrFE) films are important for protein adsorption.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Device
·
2024
·
IF 0
Cong Liu,Fang Wang,Xuemin Du
Manipulating objects using physical tweezers is crucial in physics, chemistry, and biology. Despite significant advancements, however, these tweezers are still limited by the need for complex electrode arrays, external power sources, and restricted charge-generation capability. Here, we report an innovative self-powered electrostatic tweezer (SET) that harnesses the unique capability of accumulation and tunability of triboelectric charges of the poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE))-based self-powered electrode during sliding triboelectrification, imparting unprecedented flexibility and adaptivity for object manipulation. The SET enables the precise manipulation of objects with diverse materials, including bubbles, solid balls, and liquid droplets, with a superior high velocity of 353 mm s −1 . Notably, the SET is adaptive to open-to-closed platforms, single-to-multiple objects, and two-dimensional (2D)-to-3D surfaces, thereby extending the SET to various applications including droplet robots, cell assembly, and pump-free microfluidics. By eliminating the need for complex electrode arrays, external power sources, and heat generation, the SET holds great potential for next-generation tweezers and microfluidics.
研究领域:
微流控
·
静电学
·
材料科学
·
纳米技术
·
生物物理学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jing Wang,Zhong Yang,Jianyong Jiang,Chaoyong Deng,Kongjun Zhu
Flexible dielectric materials with benign energy storage performance are highly desirable for the miniaturization, portability and integration of modern electronics. However, the limited energy storage density seriously restricts their practical applications. Herein, multilayered composite films composed of the P(VDF-HFP) matrix and Nd doped BaTiO 3 nanofibers with various filling ratios, layer numbers and topological structures were systematically designed and constructed via the layer-by-layer non-equilibrium process. The 3-layered composite films (3.0 wt% filling ratio) with the pure P(VDF-HFP) layer adjacent to the electrodes revealed good mechanical behavior, greatly enhanced captured ions at interfacial regions and suppressed injected charges from electrodes, which facilitated the improvement of the breakdown strength and discharged energy density. And a maximum U e of 25.5 J/cm 3 with a E b of 719.9 MV/m was achieved, which was not only 1.4 times more than the pure P(VDF-HFP) via the same process, but also behaved better than counterparts with the similar filling ratios and was among the top U e values of related P(VDF-HFP)-based nanocomposites.
研究领域:
材料科学
·
介电材料
·
能量存储
·
纳米复合材料
·
聚合物基复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）