JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Meng Pan,Yang Zhang,Lijie Dong
Poly(vinylidene fluoride) (PVDF) is a prominent fluoropolymer whose functional properties are governed by its polymorphic crystal structure. Conventional strategies for controlling PVDF crystallization face challenges in achieving precise, multi-scale control over molecular chain conformation, segment orientation, crystal phase, and crystallinity, hindering the simultaneous optimization of high polar β- phase content, low dielectric loss, and mechanical toughness. Here we introduce a crystallization control strategy utilizing trace fluorinated organic molecules (FOM) as additives. This approach exploits strong C-F···H-C intermolecular interactions between FOM and PVDF chains to both induce the formation of all- trans (TTTT) chain conformation and directionally guide crystalline architecture through fluorine-induced dipole alignment. At an ultralow FOM loading of 0.5 wt%, this strategy significantly enhances crystallinity and boosts the β- phase fraction from 27 % to 77 %. The resulting molecular-scale dipole orientation enables a maximum polarization ( P max ) exceeding 9.1 μC·cm −2 . Crucially, the FOM suppresses excessive crystal growth while preserving polymer chain mobility and mechanical flexibility. This molecular-level design strategy facilitates unprecedented multi-level control over chain conformation, crystal alignment, and additive dispersion, thereby overcoming the traditional trade-offs among β -phase content, dielectric loss, and toughness while offering a versatile approach to polymer crystallization control.
研究领域:
高分子材料科学
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功能高分子
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介电材料
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结晶工程
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分子设计
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 1
·119
·
IF 3.52
Yuyang Wei,Wenbin Zhang
Nickel electrodes under continuous potential cycling were applied for the electrooxidation of benzyl alcohol and glycine in KOH solutions, and their activities were measured and compared by cyclic voltammetry. It is shown that intrinsic activities of both reactions decrease with the increasing catalyst loadings, and a more significant decreasing trend was observed in glycine electrooxidation when compared to benzyl alcohol electrooxidation. These phenomena may be explained by an increasing of mass loading induced a decrease of the catalyst surface conductivity, structure changes of Ni(OH)2from α-phase to β-phase, and the intercalation of glycine molecules into nickel hydroxide interlayers.
研究领域:
电化学
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催化
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材料科学
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DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Wenquan Liu,Yu Sun,B. Narsu,Liang Qiao,Jipeng Huang,Chang Q. Sun,Guiye Shan,Biao Wang
The escalating demand for energy harvesting technologies to power small wireless devices has intensified interest in triboelectric nanogenerators (TENGs), yet challenges in energy conversion efficiency and durability persist. In this study, we present a novel core-shell BaTiO 3 @P(VDF-TrFE) nanofiber (BT@PVFT NF) structure, developed to enhance the triboelectric performance of TENGs for wearable and portable electronic applications. The BT@PVFT NF were fabricated using coaxial electrospinning , combining the high dielectric constant of BT with the ferroelectric properties of PVFT to maximize surface charge density and energy conversion efficiency. The morphological, structural, and phase characteristics of the BT@PVFT NFs were thoroughly investigated, with significant findings on the enhancement of the β-phase of PVFT through the synergistic effects of the core-shell configuration and electrospinning process . The optimized TENG demonstrated remarkable electrical output, achieving peak output voltage of 450 V and power density of 80 μW cm −2 , alongside exceptional durability over 15,500 cycles. Furthermore, the device successfully powered commercial electronics and exhibited robust mechanical energy harvesting from human motion. This work not only advances the understanding of core-shell structures in energy harvesting but also highlights the potential of the BT@PVFT NFs for self-powered sensing applications, opening new pathways for the development of energy-efficient wearable technologies .
研究领域:
材料科学
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纳米能源
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柔性电子学
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生物医学工程
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可穿戴设备
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能量收集
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ning Chen,Jun Han,Xingchen He,Junhui Shao,Najun Li,Dongyun Chen,Jianmei Lu
Efficient and recyclable piezocatalysts are expected to use natural mechanical energy to degrade organic pollutants in water during piezoelectric degradation. Herein, flexible piezocatalytic membrane (HPVDF/Ti 3 C 2 ) was obtained by introducing Ti 3 C 2 nanosheets into PVDF with further hydrophilic modification. Polar functional groups on the Ti 3 C 2 surface interact with PVDF chains to form the high piezoelectric β-phase. The good conductivity of Ti 3 C 2 contributes to enhanced electron transport in PVDF/Ti 3 C 2 . The hydrophilic and porous HPVDF/Ti 3 C 2 composite membranes facilitate the abundant adsorption and catalytic sites. Thus, HPVDF/Ti 3 C 2 degraded BPA in water under ultrasonic vibration at a rate constant 29.5 times higher than that of the pure PVDF. Furthermore, HPVDF/Ti 3 C 2 membranes coated on stainless steel packing in filled column were found to be effective in the removal of bisphenol A (BPA) under conditions of peristaltic pump-driven water flow, thus providing a promising piezoelectric membrane for water purification using low-frequency mechanical energy from nature.
研究领域:
环境科学
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材料科学
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纳米技术
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水净化技术
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电化学
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高分子科学
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催化作用
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Bo Li,Bin Yang,Xinchen Cai,Shu Zheng,Fang Wang,Chuanlai Ren,Hongxia Guo,Qianjin Wang,Weishu Liu
Polyvinylidene fluoride (PVDF) and its copolymers have garnered significant interest for flexible and wearable sensors. However, the sensitivity of PVDF-based sensors is limited by their relatively low pyroelectric properties compared to those of inorganic ferroelectric materials. In this study, we report on poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) films exposed to x-ray irradiation to increase the crystallinity and β-phase content. This increase in crystallinity and β-phase content ultimately improved the pyroelectric coefficient (150.9 μC m −2 K −1 ) by almost more than five times. The sensors, based on the irradiated P(VDF-TrFE) films, showed an outstanding thermal voltage sensitivity of 15.07 V K −1 and a current sensitivity of 12.19 nA K −1 . The sensors exhibited excellent linear temperature sensing and a precision infrared detector, making them promising candidates for self-powered electronic skin in human-machine interaction applications.
研究领域:
高分子材料科学
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柔性电子学
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生物医学工程
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传感器技术
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智能可穿戴设备
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热电材料
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人机交互
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yuxin Zhou,Tianhuan Huang,Shaohua Zhong,Xiaoqing Li,Yiwen Chen,Kunyao Su,Weihuang Yang,Jiangrong Lu,Jian Zhang
Modified poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP) exhibits excellent electrochemical stability and safety, making it one of the most promising gel polymer electrolytes (GPEs) for lithium metal batteries. To further optimize the performance of PVDF-HFP GPEs, N-formylmorpholine is used as a novel high-boiling nonsolvent for PVDF-HFP, and a uniform porous network rich in the β phase is prepared through a nonsolvent induced phase separation method. The optimized PVDF-HFP GPE (PNG10), enriched with the strongly polar β phase, can better promote the dissociation of lithium salts, while the uniform porous network provides the necessary conditions for the uniform distribution and conduction of ions, optimizing the electrode/electrolyte interface. As a result, the PNG10 GPEs achieves a simultaneous enhancement of ionic conductivity (1.32 × 10 −3 S cm −1 ) and lithium-ion transference number (0.82). Moreover, the Li|PNG10|LiFePO 4 cells demonstrate excellent long-term cycling stability and rate performance. The study highlights the importance of high-throughput porous network structures in the design of GPEs.
研究领域:
电化学
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高分子科学
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储能
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材料科学
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电池技术
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Hanbai Wu,Shuo Shi,Huiqun Zhou,Chuanwei Zhi,Shuo Meng,Weng-Fu Io,Yang Ming,Yuchao Wang,Leqi Lei,Bin Fei,Jianhua Hao,Jinlian Hu
Smart electroactive materials that can dynamically regulate stem cell fate without external stimuli have fascinated increasing attention. Meanwhile, noninvasive electrical stimulation has emerged as a less restrictive approach, generating considerable interest in its potential biomedical applications. The intricate interplay between cells and materials within complex microenvironments includes encompassing substrate response, ion exchange, and membrane potential alterations. However, the mechanisms by which smart materials influence stem cells have yet to be fully elucidated. Herein, electrospinning technology is utilized to fabricate bone-mimicking microenvironments comprising disordered and highly oriented polyvinylidene fluoride (PVDF) nanofibers. The aligned annealed PVDF (AA) and random annealed PVDF (RA) membranes present high fractions of β-phase. By comparing the osteogenic ability, calcium activity, and F-actin distribution of bone marrow-derived mesenchymal stem cells (BMSCs) cultured with these PVDF nanofibers, it is proposed that the stem cells autonomously regulate their differentiation by remodeling the cytoskeleton on the electrospun membranes. Electrical stimulation, more adhesion area, and active calcium influx support the greater osteogenesis of BMSCs on RA than AA. This mechanism can provide a basic theory for the design and preparation of bone tissue engineering scaffolds and contribute to the further study of cells and microenvironments.
研究领域:
生物医学工程
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组织工程
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细胞生物学
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材料科学
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产品关联
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2023
·
IF 1.4
Suyue Li,Shiting Wang,Wenzhong Ma,Haicun Yang,Zheng Cao,Chunlin Liu,Haimu Ye
The increased micro-capacitance of a poly (vinylidene fluoride) (PVDF) matrix can effectively improve the piezoelectric properties of the composite material. This work used chemically modified carbon nanotubes (CNTs) as the main reinforcement material. Atom transfer radical polymerization (ATRP) was used to graft polyionic liquids (PILs) with different hydrophilic anions to the CNTs’ surfaces. Solution casting and compressive melt molding were used to prepare the PVDF-composite piezoelectric films. Micro-capacitance formed by the PIL grafted CNTs dispersed well in the PVDF matrix, and their effects on the crystalline form and piezoelectric properties were studied. The hydrophobic hexafluorophosphate anion (-PF6-) can significantly improve the CNTs dispersion and enhance the micro-capacitance formation in the PVDF matrix. During solution crystallization, the synergistic effect of CNTs and PIL on the PVDF and the solvent effect made the content of β phase of PVDF/CNTs@PIL-PF6 film reach 80.2%, resulting in a high dielectric constant of 188 and a piezoelectric coefficient of 36. In the process of melt crystallization, due to shear stretching and extrusion, the CNTs@PIL-PF6 had an obvious nucleation effect on the polar crystalline phase of PVDF, with a β phase content up to 99.3%, leading to the higher dielectric constant of 530 and the piezoelectric coefficient of 31. The current discovery provides a development direction for smart piezoelectric polymer matrix composites, which have great potential in preparing piezoelectric energy storage materials.
研究领域:
材料科学
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高分子科学
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纳米技术
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电气工程
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传感器技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 39
·e57531
·
IF 2.8
Dawei Gao,Haixiang Wang,Qiaoli Lu,Chao Ye,Wang Lili
Piezoelectric sensors are critical components in advancing smart electronic devices, offering significant potential for energy harvesting and self-powered applications in flexible and wearable technologies. Poly(vinylidene fluoride) (PVDF) and molybdenum disulfide (MoS 2 ) are recognized for their exceptional piezoelectric properties, with monolayer MoS 2 effectively enhancing the piezoelectric response. This study innovatively fabricates PVDF/MoS 2 composite films via electrospinning, directly inducing polar β -phase crystal formation in PVDF and significantly enhancing piezoelectric performance. Furthermore, PVDF micro- and nanoparticles were electrostatically deposited onto the PVDF/MoS 2 films, resulting in a P-PVDF/MoS 2 composite with enhanced mechanical and piezoelectric properties. Under a mechanical force of 3 N at 2 Hz, the fabricated sensor achieved an output voltage of 5 V, a short-circuit current of 0.08 μA, and a power density of 3.5 mW/m 2 , representing increases of 552% in voltage, 33% in current, and 192% in power density compared to pure PVDF sensors. The highly flexible composite demonstrates significant potential as a wearable self-powered sensor and energy harvester, addressing applications in artificial intelligence and wireless technologies.
研究领域:
材料科学
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纳米技术
·
柔性电子学
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可穿戴传感器
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能量收集
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Haitao Li,Yingying Zhang,Han Dai,Veronica Pereir,Junfeng Zhao,Hiang Kwee Lee
Polyvinylidene fluoride (PVDF)-based piezoelectric catalysts show promise in mechanical force-driven catalysis due to their good biocompatibility, flexibility, and ease of fabrication. However, the catalytic activity of pristine PVDF is limited due to its low piezoelectric phase content (<20%), poor orientation, and low surface carrier concentration. Here, we introduce an efficient PVDF-based composite nano-catalyst (rGO/PVDF) with high piezoelectric catalytic performance. We achieve this by employing a composite strategy that combines nanoscale water-induced polarization with polar functional group-modified graphene (rGO) serving as a nanoelectrode. The nanoscale water polarization effect, together with the two-dimensional planar structure of PVDF and the modified graphene's polar functional groups, effectively induces orientation in the PVDF piezoelectric phase to increase the functional β phase content. As a result, the β phase content and crystallinity of rGO/PVDF reach 95% and 40%, respectively, which are 600% and 170% higher compared to those of pristine PVDF. This enhancement plays a crucial role in endowing the material with strong force-to-electricity conversion characteristics. Additionally, the surface-modified rGO also boosts PVDF's surface carrier concentration and provides active sites for catalysis on the rGO/PVDF composite. Notably, under optimized conditions, our catalyst achieves a ∼99.1% degradation rate of organic pollutants (10 mg L−1) after 12 minutes of sonication at 240 W and maintains a high efficiency of ∼93.7% even at a 10 times higher pollutant concentration (100 mg L−1). Our piezoelectric catalyst also demonstrates efficient H2O2 production at 95.8 mmol grGO−1 h−1, which is ∼9-fold and ∼134-fold higher than those of untreated PVDF and previously reported PVDF-based piezoelectric catalysts, respectively. This work paves the way for the development of highly efficient PVDF-based piezoelectric catalysts, thereby offering valuable insights for the advancement of mechanically driven catalysis in the environmental, energy, and chemical sectors.
研究领域:
材料科学
·
环境科学
·
催化
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Zhiyuan Zhou,Jie Wang,Jiamin Zhang,Xiyue Duan,Weiming Lin,Kui Cheng,Wenjian Weng,Zuobing Chen
Surface potential of biomaterials is found to be important for wound healing. Here, poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) films with different surface potentials and piezoelectric responses were prepared and explored for the effect of surface potential on wound healing. The crystalline state of P(VDF-TrFE) films were characterized with X-ray diffraction (XRD), differential scanning calorimetry (DSC) and Fourier-transformed infrared spectroscopy (FTIR), illustrated that the electric polarization will promote the crystallization of the β phase of P(VDF-TrFE), in which the content of β phase increased from 82.9 % to 86.8 % compared with the control. Then, Kelvin potential and piezoelectric coefficient d 33 were to evaluate surface potential and polarization performance. Moreover, bovine serum albumin (BSA) adsorption and cell culture results showed that high surface potential can promote protein adsorption as well as fibroblast proliferation and macrophage polarization. Finally, in vivo experiments indicated that high voltage polarized P(VDF-TrFE) films can generate higher dynamic potential up to 2.3 V, and promoted wound healing from the phases of inflammation, proliferation and remodeling, the wound healing rate of which was 88.8 % ± 0.8 %, significantly higher than 79.1 % ± 2.5 % and 86.4 % ± 1.8 % of blank and control. In general, this work revealed that polarized P(VDF-TrFE) films can promote wound healing, shed light on designing wound healing materials with similar properties.
研究领域:
生物材料
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伤口愈合
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2025
·
IF 1.4
Jixuan Yin,Wenzhong Ma,Haicun Yang,Qiuyan Bi,Zheng Cao,Chunlin Liu
This article describes a significant enhancement of the piezoelectric properties of poly(vinylidene fluoride) (PVDF) through interfacial engineering and a magnetically oriented structural design. Reversible addition-fragmentation chain transfer (RAFT) polymerization and click chemistry were used to graft three polyionic liquids (PILs) with different alkyl chain lengths onto the surface of MXene. This successfully suppressed MXene’s self-stacking problem and enhanced its compatibility with PVDF. Next, Fe3O4 nanoparticles were introduced to impart a magnetic response, followed by a solution-melt synergistic "piezo-folding cycle” process to induce the formation of the β-phase. In the experiments, this resulted in a piezoelectric coefficient (d33) of 45 pC/N, a 15-fold increase compared to pure PVDF (∼3 pC/N). The resulting piezoelectric nanogenerator (PENG) produces an output current of 0.2 mA at a 120 N load and exhibits a sensitivity of 6.67 µV/N. This work demonstrates the effectiveness of using MXene to induce piezoelectricity in PVDF.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
能量存储
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传感器
·
电气工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）