CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 39
·期 5
·566-572
·
IF 3.154
Luo Qi,Pu Hong-Ting,Zhang Zhi-Hua,Zhang Xiong,Yu Cheng-Long
Multilayer membranes prepared via microlayer coextrusion have attracted wide attention due to their unique properties and broad applications. In present study, the foam/film alternating multilayer sheets based on ethylene-vinyl acetate copolymer (EVA) and high-density polyethylene are successfully prepared via microlayer coextrusion. The cells in the sheets are single-cell-array along the foamed EVA layers with uniform cell size. In addition, the effects of layer number and foam relative thickness on morphology, mechanical properties, damping and heat insulation properties are investigated. The cell size decreases significantly with increasing layer number due to the enhanced confine effects. The tensile strength, elongation at break, and heat insulation also increase significantly. However, the mechanical damping properties change little in the observed frequency. Meanwhile, with higher relative thickness of EVA foam, the sheets have lower tensile strength and lower thermal conductivity, while the damping properties are enhanced in a specific frequency scope. The elongation at break of the optimized sample comes to 800% and the thermal conductivity decreases to 61 mW·m −1 ·K −1 , which shows high toughness and low thermal conductivity, indicating a possible method for preparing materials with high toughness and heat-insulating properties.
研究领域:
材料科学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Zhanghua Zou,Zhiyu Hu,Hongting Pu
Low-dimensional nanomaterial separators are considered prime candidates for next-generation lithium-ion battery separators due to their higher porosity and thinner thickness. For polyolefin materials, there is no suitable solvent for solution electrospinning, the low yield of melt electrospinning, and the large size of melt-blown fibers make it challenging to efficiently prepare polyolefin low-dimensional nanomaterials. Moreover, polyolefin materials have been criticized for poor electrolyte wettability and insufficient thermal stability. Herein, polypropylene (PP) nanobelts (NBs) are prepared via a high-efficient nanolayer co-extrusion technique as supporting skeleton to suppress the shrinkage of natural cellulose separators during dehydration effectively, and the cellulose fibers have optimized pore size to prevent internal short circuits. The results indicate that the as-prepared PPNBs/cellulose composite separator (PPNBs/CS) with sandwich structure has superior porosity (78.4%) and ionic conductivity (1.04 mS cm −1 ). Meanwhile, the thermal stability, electrolyte uptake, and tensile strength are all significantly improved due to the synergies between PPNBs and cellulose fibers. More importantly, the LiFePO 4 ||PPNBs/CSs||LM half cells exhibit better rate-performance and cycling durability than Celgard® 2400. Similarly, the NCM811||LM half cells and NCM811||graphite full cells assembled from PPNBs/CS-1/2 also exhibit good electrochemical performance. This work opens a new approach for easy batch preparation of high-performance lithium-ion battery separators.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 9
·45917
·
IF 1.86
Yajie Li,Hongting Pu,Junfeng Cheng,Jiang Du,Haiyan Pan,Zhihong Chang
A convenient and continuous method to prepare porous polystyrene (PS) membranes via a microlayer coextrusion and template method is proposed. The porous PS membranes can be obtained via the acid etching of a CaCO 3 template embedded in the membranes. Scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy of the porous PS membranes show that most of the CaCO 3 particles can be etched away. The effects of etching time, CaCO 3 content, and membrane thickness on the porous structures are investigated, which can be used to regulate and control the porous structure. To demonstrate the adsorption performance of porous PS membranes on polycyclic aromatic hydrocarbons, pyrene is used as the model compound. Compared with that of solid PS membranes, porous PS membranes exhibit much higher adsorption performance for trace pyrene. The adsorption kinetics and isotherm of porous PS membranes can be well fit by pseudo-second-order kinetics and a Freundlich isotherm model. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45917.
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
WATER RESEARCH
·
2025
·
IF 12.4
Wenjian Lao,Xiaoyan Shang,Shuiqiang Yu,Huiquan Xiao,Yingying Lou,Cuihua Song,Jinmao You
Passive sampling methods can provide valuable insights for monitoring hydrophobic organic compounds (HOCs) in aquatic environments. As the list of target HOCs expands, there is an increasing demand for passive samplers that can detect a broader range of these compounds. This study aimed to assess the efficacy of a three-layer co-extruded polyethylene/ethylene vinyl acetate (TLC-EVA) film alongside three existing materials (polyethylene (PE), polydimethylsiloxane (PDMS), and poly(methyl methacrylate) (PMMA)) for passive sampling of carbazole and five halogenated carbazoles (PHCZs), a group of dioxin-like chemicals, in water. The films were calibrated through batch experiments to determine the partition coefficients between the polymer and water ( K PW ). The performance of the samplers and the presence of PHCZs were evaluated through 7- and 14-day exposures in the Xiaoyi River, which flows through Qufu City, China. The log K PW values varied significantly among the compounds and were generally consistent across the four films, ranging from 2.73 to 4.14 for EVA, 2.65 to 4.21 for PE, 2.85 to 3.98 for PMMA, and 2.62 to 4.22 for PDMS. These findings indicate that the films can effectively function as passive samplers for PHCZs. Additionally, a comparison of log K PW results with physicochemical parameters (log K OW and log K OC ) highlighted the negative impact of halogen substituents and steric hindrance on sorption, particularly for 1,3,6,8-tetrabromocarbazole. The passive sampling reached equilibrium within the 7-day exposure period, with all PHCZs detected in the river water. Increased concentrations at urban and wastewater treatment plant outlet sampling sites suggested specific sources of PHCZs. Our results advocate for the application of multilayer co-extrusion films as a novel material for passive sampling of HOCs.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2022
·
IF 4.432
Yajie Li,Haicun Yang,Azita Ahmadi,Aziz Omari,Hongting Pu
Multilayer separators are widely used due to their wide shutdown window by combining lower melting temperature and higher melting temperature of different layers. With the development of high power lithium-ion batteries, multilayer separators equipped with effective thermal stability and flame retardancy are highly required. Herein, the poly(methyl methacrylate) modified attapulgite (ATPM) is selected as the heat resistant reinforcing component and blended with polypropylene (PP)/polyethylene (PE) respectively. Then we prepare PP(ATPM)/PE(ATPM) separators via multilayer coextrusion efficiently without multiple stretching processes, which can avoid serious separator shrinkage at elevated temperature. The intertwined ATPM could not only enhance the separator integrity, but also produce water vapor and oxide anti-flaming isolation layers at high temperatures. The as-prepared separators, referred to as MC-TIPS PP/PE/ATPM, exhibit higher thermal stability (with negligible dimensional shrinkage up to 180 °C), better flame retardancy and wider shutdown temperature window (124–183 °C) than the commercial multilayer separators. Moreover, the introduction of ester and hydroxyl groups could improve the wettability and electrolyte uptake of the separators. These properties, as well as the potential for large-scale production of multilayer coextrusion, make MC-TIPS PP/PE/ATPM an ideal choice for high-power battery separators.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Liyun Huang,Kui Wu,Rui Zhang,Hongbing Ji
Herein, we designed two simple devices by exploiting the advantages of coaxial shear microfluidic and coextrusion minifluidic devices to generate multicore milli- and microcapsules for encapsulating hydrophobic drugs. The number of cores could be precisely controlled by tailoring the flow rate or number of inner tubes. Similarly, the shell thickness and core size could be controlled accurately. In this study, the UV stability of α-tocopherol (model drug) capsules was investigated. The result shows that the oxidation rate of α-tocopherol in millimeter capsules was much slower than that in free or micrometer capsules, which was related to the shell thickness of the capsules. Moreover, size- and core-number-dependent release was observed in vitro, where the millimeter capsules exhibited dramatic discrepancies of release rate compared with micrometer capsules. The release mechanism of capsules was primarily illustrated to include burst release, swelling and erosion release, and diffusion release, which was consistent with the phenomenon observed online using a high-speed camera.
研究领域:
药学
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药物递送系统
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微流控技术
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhanghua Zou,Yanli Wei,Zhiyu Hu,Hongting Pu
Nanofiber separators are becoming increasingly popular in high-performance lithium-ion batteries (LIBs) due to their high porosity, high electrolyte uptake, and thinner thickness. So far, polypropylene (PP) materials occupy a large share of the LIB separator market due to their low cost and stable electrochemical properties. However, it is difficult to realize the preparation of PP nanofibers by solution electrospinning because there is no corresponding solvent for PP materials. Moreover, the large size of melt-blown PP fibers cannot reach the nanoscale. PP nanofibers produced by nanolayer coextrusion technology at mass can be processed into LIB separators. The tensile strength of PP nanofiber separators (PPNFS) treated with hot pressing at 120 °C (PPNFS-120) increases by 423%. PPNFS-120 has low interfacial impedance and high ionic conductivity (1.5 mS cm −1 ) and exhibits satisfactory thermal stability at 160 °C. In addition, the electrolyte uptake of PPNFS-120 (265%) is significantly enhanced due to the higher porosity (71.7%). More importantly, the PPNFS-120-based NCM811/graphite and LFP/graphite full cells exhibit excellent rate-performance and cycling stability. This work provides a new idea for the large-scale preparation of high-performance polyolefin nanofiber separators.
研究领域:
材料科学
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电化学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 6
·433-439
·
IF 1.808
Li-Jing Lu,Li-Xin Lu
High density polyethylene/low density polyethylene (LDPE) antioxidant multilayer films were prepared by the co-extrusion method, and quercetin was incorporated in the LDPE layers as an antioxidant. The release rates of quercetin and the antioxidant activities of films were adjusted by changing the amount of ethylene vinyl acetate (EVA) and diatomite added into the LDPE active layer. The morphologies of the films were observed by SEM, and the release property of quercetin was characterized by a high-performance liquid chromatography (HPLC) method. The mechanical properties and heat sealing performance of the films were influenced to a certain extent by the amounts of EVA and diatomite in the active layers, while the barrier properties of the films were almost unchanged. The release of quercetin from the active films to a food simulant (95% alcohol) at 37°C was measured over 55 days. When the EVA amounts were 30% and 40% to 50%, the diffusion coefficients, D, were 10 −14 and 10 −13 cm 2 /s, respectively. In addition, the antioxidant activity values of the films were enhanced as the EVA amount increased. When adding diatomite into the active layer with 50% EVA, the diffusion coefficient, D, was 10 −11 cm 2 /s, and the quercetin was almost completely released with a partition coefficient, K, of less than 1. Meanwhile, the antioxidant activity values of the films exceeded 95%. The antioxidant release rate could be adjusted within a wide range; thus, these active films could be used for food antioxidant protection.
研究领域:
材料科学
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聚合物科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Wenjun Li,Jianyou Feng,Haoyu Zhang,Chengqiang Tang,Jinyan Li,Ziwei Liu,Yiqing Yang,Jiajia Wang,Kun Zhang,Songlin Zhang,Huisheng Peng,Xuemei Sun
Fiber electrochemical sensors hold great promise for wearable and implantable biomedical monitoring due to their miniature size and excellent compatibility with biological tissues. However, their application in stable and long-term monitoring, particularly in vivo, has been hindered by structural instability and inconsistent performance stemming from conventional fabrication approaches based on surface functionalization. Here, a novel co-extrusion strategy is presented to enable continuous fabrication of highly stable and performance-consistent fiber electrochemical sensors, through co-extruding sensing active materials with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) suspension. Utilizing this strategy, a series of co-extruded fiber sensors (EFSs) tailored for versatile biochemical sensing, including hydrogen peroxide (H 2 O 2 ), ascorbic acid (AA), and glucose are developed. Benefiting from the uniform embedding of active materials within interpenetrating conductive polymer networks, the EFSs exhibited robust structural integrity and functional stability under complex dynamic conditions (e.g., cyclic bending and friction) and prolonged liquid immersion, along with highly consistent performance with deviations < 5%. Furthermore, after implantation in mice, the EFSs demonstrated stable subcutaneous monitoring of H 2 O 2 under dynamic biological environments and continuous intracerebral monitoring of AA over 14 days. This co-extrusion strategy offers a promising pathway for the scalable fabrication of high-performance fiber electrochemical sensors and other bioelectronic devices with exceptional stability and consistency.
研究领域:
电化学传感器
·
柔性电子学
·
生物医学设备
·
纳米技术
·
高分子科学
·
可穿戴传感器
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植入式器件
·
生物电子学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenquan Huang,Zhiqiang Li,Weiqi Liu,Shiyuan Liu,Rujin Zhou,Yanbin Jiang
Zein is an excellent protein-based pharmaceutical excipient , which has been extensively studied as a carrier for drug delivery system (DDS). However, the poor target ability of zein has limited its efficient delivery and in vivo applications. In this study, the B16 cancer cell membrane coated α-zein biomimetic drug delivery system was prepared to enhance homotypic target ability. The solubility and self-assembly behavior of α-zein were studied using different solvents, the particle size uniformity, stability and toxicity were evaluated. Then B16 cancer cell membrane (CCM) modified α-zein based nanocarrier was prepared by using the co-extrusion method. The AFM analysis showed that Young’s modulus (530.53 ± 66.55 MPa) of CCM-α-zein was smaller than that of membrane-derived vesicles, but bigger than that of α-zein. After coating the CCM on the surface of α-zein, the surface adhesion force of CCM-α-zeinα-zein (56.4 ± 4.6 nN) was significantly reduced. The results of protein electrophoresis showed that CCM-α-zein could completely retain the proteins of α-zein and CCM after co-extrusion. The safety of the DDS prepared was proved by the hemolysis test and non-tumor cells experiment. Paclitaxel was selected as the model drug to prepare DDS nanoparticles , the results of the cell experiment showed that the migration area of B16 cells was reduced by 5.79%, which indicated the strong inhibition migration ability of DDS. The nuclear activity analysis showed that the nuclei of B16 cells were broken into fragments. Qualitative and quantitative studies suggested that the prepared CCM-α-zein possessed homologous targeting ability. Therefore, this work presents an effective strategy to enhance the targeting ability, which will extensive biomedical applications of zein.
研究领域:
药学
·
生物医学工程
·
纳米技术
·
癌症研究
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2014
·
IF 3.633
Huyan Shi,Fu Liu,Lixin Xue,Huafeng Lu,Qingbo Zhou
Ag-loaded zeolites were synthesized and embedded into the outer layer of poly(vinylidene fluoride) (PVDF) dual-layer hollow fiber membrane (D) using a dry-jet wet-spinning co-extruding technique. The distribution of the Ag-loaded zeolites in the outer layer was confirmed by field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX). It was found that the D contained only 54% of the amount of Ag-loaded zeolites that were distributed throughout the cross section of PVDF single-layer hollow fiber membrane (S), as calculated by thermogravimetric analysis (TGA). However, D showed excellent antibacterial efficiency and resistance to bacterial adhesion because of the higher concentration of Ag + in the outer layer of the membrane. The surface morphologies , pure water flux, mean pore size, pore size distribution , and thermal stability of both PVDF membranes were also investigated.
研究领域:
材料科学
·
化学工程
·
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）