Nano Energy
·
2024
·
IF 16.8
Rongyan Yin,Yinhui Li,Weidong Li,Fei Gao,Xiao Chen,Tingyu Li,Jianguo Liang,Hulin Zhang,Haifeng Gao,Pengwei Li,Yunlei Zhou
High-temperature sensors are critical in petrochemical, aerospace, and automotive industries. However, the inorganic piezoelectric materials for high-temperature sensors are usually rigid and only can work in low temperatures due to their low Curie temperature (< 200 °C), which restricts these sensors for high-temperature application. Herein, we report a high-temperature piezoelectric sensor based on PAN/Zn(Ac) 2 composite nanofiber mat created via electrospinning and thermal-oxidative stabilization process, which can continuously work over 500 °C. Moreover, the heat-treatment PAN is first found to be pyroelectric. The effects of the different heat-treatment temperatures on the mechanical and electrical performance of PAN/Zn(Ac) 2 composite nanofiber mats are studied systematically. The maximum voltage output of the PAN/Zn(Ac) 2 composite film sensor is 14.13 V at room temperature, and the voltage output of the composite film (450 ℃ heat-treated) sensor is about 14.86 V at high temperature. Besides, it has durability for over 10000 cycles (room temperature), and it has durability for over 5000 cycles and stability after 60 days (400 ℃). The PAN/Zn(Ac) 2 composite nanofiber film also showed a linear voltage response to the thermal gradient, but the pyroelectric output of the PAN/Zn(Ac) 2 composite nanofiber film is independent of the heat treatment temperature. The PAN/Zn(Ac) 2 composite film sensor can charge a capacitor and can instantly drive small electronic devices when the capacitor discharges, and the PAN/Zn(Ac) 2 composite film sensor can be applied to fire safety. Overall, good flexibility, high-temperature resistance, and bifunctional sensing ability make PAN/Zn(Ac) 2 -type sensors expected to be widely used in the high-temperature field of fire safety, the automotive industry, and other harsh environment.
研究领域:
材料科学
·
传感器技术
·
能源与环境
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 7
·4167-4175
·
IF 12.732
Haoyu Li,Peng Mu,Jian Li,Qingtao Wang
Purification of highly emulsified oily wastewater is of significance but challenging due to the critical limitations of low efficiency and serious membrane blocking. Herein, inspired by the desert beetle's capability of water-collection in air, we first constructed an inverse desert beetle-like membrane to achieve oil capture in water, thus improving the separation performances of the surfactant-stabilized oil-in-water emulsion. The as-prepared nanofibrous membrane consists of hydrophobic/oleophilic ZIF-8 bumps and underlying underwater superoleophobic polyacrylonitrile (PAN), and possesses a similar structure to desert beetles but with opposite wettability. In the process of emulsion demulsification, besides the sieving effect of the underlying traditional underwater superoleophobic PAN membrane, the bumpy oleophilic ZIF-8 particles of the composite membrane can capture oil, thus strengthening the demulsification ability of the membrane. Furthermore, the separation efficiency of the inverse desert beetle-like membrane is up to 99.92% for surfactant-stabilized oil-in-water emulsion, which is superior to that of traditional single underwater superoleophobic PAN membranes lacking the hydrophobic bump structure. Moreover, for light oil-in-water emulsion, the permeation flux also increases because the captured tiny oil droplets can aggregate subsequently and grow large enough to detach from the underlying surface which greatly reduces the incidence of filter cake formation and congestion. This inverse desert beetle-like membrane opens up new avenues for designing advanced membranes in the oil/water emulsion separation field.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 11
·4669-4679
·
IF 2.8
Tang Liping,Wu Yankang,Lei Zhiqiang,He Yu,Chen Jian
An in situ–grown TiO 2 membrane was prepared by an electrospinning method using polyacrylonitrile as the spinning precursor, combined with the TiO 2 hydrolysis mechanism. The performance of tetrabutyl titanate and isopropyl titanate as two titanium source precursors hydrolyzed under the inhibition of acrylic acid to produce TiO 2 with different contents for lithium-ion batteries was compared. The experimental results showed that when both titanium sources were prepared at 3 wt%, the comprehensive performance of the separator manufactured with tetrabutyl titanate as the titanium source (PAN/TBT-3) and isopropyl titanate as the titanium source (PAN/TPT-3) was finest than that of the Celgard 2400 and the composite membrane with direct TiO 2 addition (PAN/TiO 2 -3). The tensile strength of PAN/TPT-3 and PAN/TBT-3 membranes were 7.82 MPa and 4.03 MPa higher than that of Celgard 2400, and 17.03 MPa and 13.29 MPa higher than that of PAN/TiO 2 -3 separator, respectively. PAN/TPT-3 and PAN/TBT-3 membranes exhibited a discharge capacity of 107.72 mAh/g and 115.79 mAh/g at 2 C, and both the capacity retention rate was above 99.5% higher than 80.5% for Celgard 2400.
研究领域:
材料科学
·
纳米技术
·
储能
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Mengjie Pu,Daqi Ye,Jinquan Wan,Bentuo Xu,Wei Sun,Wei Li
A novel peroxymonosulfate (PMS) catalyst, zinc-based metal–organic framework electrospinning (ES) nanofibers membrane (short for ZIF-65/PAN) was firstly fabricated and used for the degradation of aqueous ciprofloxacin (CIP). Physicochemical properties, catalytic performance, stability, reusability, and the regeneration of ZIF-65/PAN was observed and conducted. Influence of various parameters including ZIF-65 loading content, reaction temperature, initial pH, and competitive organic molecules on CIP degradation was investigated. Reactive active species and degradation intermediates that involved in ZIF-65/PAN/PMS/CIP process were identified. Corresponding reaction mechanisms were speculated. The results indicate that the easy-separation ZIF-65/PAN nanofibers exhibit high efficiency for PMS activation, 89.2 % of CIP was degraded within 60 min, with up to 87.5 % of PMS utilization efficiency. ZIF-65/PAN was renewable through simple layer-by-layer self-assembly, thus shows good prospect in future applications. 26.4 % of surface Zn 2+ of ZIF-65/PAN exists in the form of + III oxidation state after activation, indicating the role of zinc catalytic site. Through activation, oxidative active species SO 4 ·− , ·OH, and 1 O 2 was generated, CIP was thus degraded through mainly-three pathways. This study provides novel ideas for the application of MOF-based membrane on PMS based advanced oxidation processes.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 26
·39638-39648
·
IF 5.19
Liu Suo,Wu Dingsheng,Hu Jinyan,Zhao Lingling,Zhao Lei,Yang Maohuan,Feng Quan
It is necessary to effectively separate photocatalytic materials from water bodies and reuse catalysts for industrial wastewater treatment. Herein, a novel nanofiber membrane with enhanced light absorption and reusability of photocatalytic materials was prepared. The three-dimensional porous structure of the nanofibers helps the photocatalyst efficiently degrade pollutants. Specifically, a high-efficiency photocatalyst carrier with a nanofiber structure (PAN/PU/β-CD@Ag nanofiber membrane) was prepared by electrospinning and a simple silver plating process, and then ZnO NPs were synthesized in situ on the nanofiber membrane during the hydrothermal process. Under visible-light irradiation, the ZnO-loaded PAN/PU/β-CD@Ag nanofiber membranes exhibited excellent photocatalytic performance for the degradation of methylene blue (MB, 71.5%) and tetracycline hydrochloride (TCH, 70.5%). Additionally, a possible pathway of charge migration in this system was proposed. This design may provide a new idea for the preparation of visible-light photocatalytic nanofiber membranes and their treatments of wastewater containing dyes and hormones.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 20
·4387
·
IF 4.967
Shiqian Hu,Zida Zheng,Ye Tian,Huihong Zhang,Mao Wang,Zhongwei Yu,Xiaowei Zhang
The growing issue of particulate matter (PM) air pollution has given rise to extensive research into the development of high-performance air filters recently. As the core of air filters, various types of electrospun nanofiber membranes have been fabricated and developed. With the novel poly(acrylonitrile) (PAN)-CuCl2composite nanofiber membranes as the filter membranes, we demonstrate the high PM removal efficiency exceeding 99% and can last a long service time. The nanoscale morphological characteristics of nanofiber membranes were investigated by scanning electron microscopy, transmission electron microscopy, and mercury intrusion porosimeter. It is found that they appear to have a special net structure at specific CuCl2concentrations, which substantially improves PM removal efficiency. We anticipate the PAN-CuCl2composite nanofiber membranes will be expected to effectively solve some pressing problems in air filtration.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2025
·
IF 2.4
Qiuxue Zhang,Yunjiao Deng,Zhongyu Fu,Pengfei Deng,Chao Zhou,Huixuan Zhang
Spinning oil was an important adjuvant used in the process of polyacrylonitrile (PAN) precursors. In this article, amino modified polydimethylsiloxane (AMPS) emulsions with excellent properties that could be used as spinning oil were successfully prepared. AMPS was synthesized firstly with octamethylcyclotetrasiloxane (D4), 3-(dimethoxy(methyl)silyl)propylamine (KH554) and decamethyltetrasiloxane(MD2M). The AMPS emulsion was prepared with AMPS, emulsifiers, acetic acid and water, and the influence of amino content on the properties of AMPS and AMPS emulsions was investigated in detail. The introduction of amino decreased the thermal decomposition temperature and enhanced the thermal stability of AMPS at 500–600 °C. In addition, the particle size and water contact angles of AMPS emulsion were obviously reduced with the increase of amino content, as the interaction between AMPS and PAN was enhanced. When the proportion of KH554 was 7.5%, AMPS emulsion had a proper particle size of 160.3 nm and a small contact angle of 34.5° with PAN film, which could be applied as spinning oil during the processing of PAN precursors. The optimum solid content of AMPS emulsion coating on the PAN precursors was also investigated. The surface of PAN precursors was smooth and the grooves were nearly repaired with the solid content of 1 wt%.
研究领域:
高分子科学
·
材料工程
·
化学工程
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Haipeng Dong,Xiaowei Li,Yu Liu,Wanying Cheng,Xinghua Li,Dongxiao Lu,Changlu Shao,Yichun Liu
Wearable gas sensors have drawn great attention for potential applications in health monitoring, minienvironment detection, and advanced soft electronic noses. However, it still remains a great challenge to simultaneously achieve excellent flexibility, high sensitivity, robustness, and gas permeability, because of the inherent limitation of widely used traditional organic flexible substrates. Herein, an electrospinning polyacrylonitrile (PAN) nanofiber network was designed as a flexible substrate, on which an ultraflexible wearable gas sensor was prepared with in situ assembled polyaniline (PANI) and multiwalled carbon nanotubes (MWCNTs) as a sensitive layer. The unique nanofiber network and strong binding force between substrate and sensing materials endow the wearable gas sensor with excellent robustness, flexibility, and gas permeability. The wearable sensor can maintain stable NH3 sensing performance while sustaining extreme bending and stretching (50% of strain). The Young’s modulus of wearable PAN/MWCNTs/PANI sensor is as low as 18.9 MPa, which is several orders of magnitude smaller than those of reported flexible sensors. The water vapor transmission rate of the sensor is 0.38 g/(cm2 24 h), which enables the wearing comfort of the sensor. Most importantly, due to the effective exposure of sensing sites as well as the heterostructure effect between MWCNTs and PANI, the sensor shows high sensitivity to NH3 at room temperature, and the theoretical limit of detection is as low as 300 ppb. This work provides a new avenue for the realization of reliable and high-performance wearable gas sensors.
研究领域:
材料科学
·
纳米技术
·
可穿戴技术
·
传感器技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Junyan Cui,Menghui Wan,Zhihua Wang,Yanbao Zhao,Lei Sun
Air particulate pollution from increasing industrialization poses an enormous threat to public health. It is therefore of particular importance to develop air filters with excellent filtration properties and antimicrobial properties. Here we design a novel air filter for outdoor personal protection. The air filter’s composite nanofibrous materials are prepared by electrospinning method using polyacrylonitrile (PAN) as the base polymer, silica dioxide (SiO 2 ) as the electret r and cetyltrimethylammonium bromide (CTAB) as the antimicrobial agent. Fourier-infrared spectroscopy, surface potential, and X-ray photoelectron spectroscopy characterization reveal the successful incorporation of SiO 2 and CTAB into PAN . The air filtration test shows that the composite nanofibrous membrane has outstanding PM 0.3 filtration efficiency (98.5%) and lower pressure drop (76 Pa) at 32 L/min flow rate. Moreover, the durability tests show that the composite nanofibrous membranes have a long lifetime in terms of filtration performance. The filtration efficiency is reduced by only 2% after 48 h. In addition, the antimicrobial properties were tested by implementing both E. coli and S. aureus with up to a 99% bacteriostasis rate. Thus, this work improves the application potential of high-performance air filters for the removal of particulate pollution and may provide useful insights into the design of next-generation air filters suitable for applications in high antibacterial applications.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Cailin Yang,Qiuyu Mei,Haipu Li,Zhian Wang,Hua Wan,Kai Han
We developed electrospun MXene/PAN nanofiber membranes (EMPs) for efficient photothermal interfacial evaporation (PIE) in radioactive wastewater treatment. Ti3C2Tx nanosheets were uniformly intercalated into the PAN matrix during electrospinning, improving membrane stability and durability. We used the CIE Lab color space to analyze the relationship between membrane color and solar absorption, and the EMP membrane showed a strong average light absorption of 92.7%. A two-dimensional (2D) water transport structure was employed to improve water supply during evaporation. As a result, the EMP evaporator reached a high evaporation rate of 1.96 kg·m–2·h–1 and a photothermal conversion efficiency of 91.34%. The membranes also exhibited excellent nuclide rejection of I–, Cs+, Sr2+, and Co2+ and showed a self-cleaning effect as surface salts redissolved during dark periods. This work highlights the potential of combining material design and water management for solar-driven radioactive wastewater purification.
研究领域:
材料科学
·
环境工程
·
核工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 23
·e53928
·
IF 3
Jiawen Fu,Haowei Pan,Mingzhe An,Zihao Li,Hong Wang,Xinping He,Chunhai Yi
Polyvinyl alcohol (PVA) is a promising membrane material for pervaporation (PV) desalination. However, the adjustment and control of the cross-linking structure is still a challenge for PVA membrane. In this study, a novel pH-resistant PVA-based composite membrane for efficient pervaporation desalination was developed by precisely adjusting the cross-linking behavior. Vinyl alcohol-vinylamine copolymer (VA-co-VAm) containing both hydroxyl and amino groups was synthesized. Cross-linking reaction was carried out based on the Schiff base reaction between amino groups (in VAm moiety) and glutaraldehyde (GA) under alkaline conditions. Cross-linking degree of PVA selective layer was carefully controlled by adjusting the amino group content in copolymer. Results showed that membrane prepared with VA-co-VAm that containing 5 wt% N-vinylformamide (NVF) displayed superior hydrophilicity and the largest free volume fraction. Pervaporation test indicated that the modified cross-linking membrane showed good stability under extreme pH conditions. Specifically, under strong acid conditions (pH ~ 1) and alkaline conditions (pH ~ 14), the membrane showed excellent desalination performance with water flux over 12 kg/(m 2 h), and the salt rejection higher than 99.95%. Based on the above results, the prepared membrane offers a promising platform for desalination under extreme pH conditions, which shows great potential in industrial wastewater treatment.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Chunlong Zuo,Wei Tan,Jieyun Zhao,Lina Jiang,Yongli Zhang,Yuanlin Ren,Xiaohui Liu
To develop green and efficient polyacrylonitrile (PAN) fibers with excellent fire safety properties, a new biomass-based flame retardant (PPC@VA) with vinyl-terminated groups was prepared based on the reaction of hexachlorocyclotriphosphonitrile, teat polyphenols, ethylenediamine and vinylphosphonic acid. Subsequently, it was mixed with spinning solution to obtain PPC@VA/PAN through wet spinning, which were then chemically cross-linked via thermal initiation to achieve CC-PPC@VA/PAN fibers. CC-PPC@VA/PAN showed a significant improvement in flame retardancy with a limiting oxygen index value of 32.5 %. The peak of smoke production rate, total smoke production and CO production rate were lowered by 81.9 %, 77.8 % and 91.3 %. Besides, the hazardous gas HCN was greatly suppressed. Owing to the macromolecular entanglement, hydrogen bonding and covalent cross-linking, CC-PPC@VA/PAN improved elongation at break and tensile strength by 19.2 % and 72.1 %. Also, chemical cross-linking contributed to decrease the migration of P/N-based flame retardants, lower the potential risk of water eutrophication and increased the service life of the fibers.
研究领域:
材料科学
·
环境科学
✓ 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）