FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 3
·801-810
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IF 2.5
Wang Yi,Qin Hui,Chen Shuyi,Liu Yuan,Luo Jun,Nie Shengqiang
In this study, a highly efficient, convenient, and universal protocol of in situ cross-linking copolymerization of 2-hydroxyethyl methacrylate and sodium p-styrenesulfonate in polyvinylidene fluoride (PVDF) solution was presented to prepare blood-contacting material with good blood compatibility. The modified PVDF membranes were prepared by liquid–liquid-phase inversion technology, which could induce the enrichment of hydrophilic groups including sulfonic acid and hydroxyl groups on the surface of the modified PVDF membranes. The hydrophobic-fluorinated PVDF surfaces with hydrophilic sulphonic acid and hydroxyl groups exhibited high performance with prolonged clotting time (activated partial thromboplastin time and thrombin time) and low activation of blood components (platelets, coagulation cascade, and complements) when they contacted blood. On the other hand, the ultrafiltration experiment results revealed the improvement in the antifouling properties of the modified PVDF membranes after the introduction of hydrophilic groups on the membranes surface. The results indicate that the blood-compatible PVDF membranes may have potential to be used in the field of blood purification, and can be used as long-term blood-contacting materials as well.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 6
·925-933
·
IF 1.6
Tang Tingfan,Li Xiaohui,Zhu Jiaqing,Huang Wenyi,Cheng Hao,Feng Jun
In this paper, a polymer monolithic column based on poly (Butyl methacrylate-co-ethylene glycol dimethacrylate) (poly (BMA-co-EDGMA)) doped with MIL-53(Al) metal–organic framework (MOF) was prepared using an in situ polymerization method. The characteristics of MIL-53(Al)-polymer monolithic column were studied through scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), energy-dispersive spectroscopy (EDS), X-ray powder diffractometry (XRD), and nitrogen adsorption experiment. Due to its large surface area, the prepared MIL-53(Al)-polymer monolithic column has good permeability and high extraction efficiency. Using MIL-53(Al)-polymer monolithic column for solid-phase microextraction (SPME), coupled to pressurized capillary electrochromatography (pCEC), a method for the determination of trace chlorogenic acid and ferulic acid in sugarcane was established. Under optimized conditions, chlorogenic acid and ferulic acid have a good linear relationship ( r ≥ 0.9965) within the concentration range of 50.0–500 µg/mL, the detection limit is 0.017 µg/mL, and the relative standard deviation (RSD) is less than 3.2%. The spike recoveries of chlorogenic acid and ferulic acid were 96.5% and 96.7%, respectively. The results indicate that the method is sensitive, practical, and convenient. It has been successfully applied to the separation and detection of trace organic phenolic compounds in sugarcane samples. Graphical abstract
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2023
·Vol. 31
·期 9
·3894-3906
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IF 5.3
Zhang Hankun,Xu Xia,Tang Xinru,Kong Fanxing
The combined pollution of microplastics (MPs) and antibiotics in the water environment has received much attention in the past decade. MPs are often considered ideal adsorption carriers for organic matter (OM) in the water environment. Meanwhile, mechanical wear and ultraviolet radiation will make MPs age and enhance the adsorption of OM on MPs. In this study, biodegradable polylactic acid (PLA), non-biodegradable polyethylene terephthalate (PET), and polypropylene (PP) were aged by K 2 S 2 O 8 advanced oxidation. The adsorption behavior of MPs before and after aging to norfloxacin antibiotic (NOR) was studied. Results showed that the surface of MPs after aging had cracked and become rougher. The aged PLA was the most changed among the three kinds of aged MPs, and its specific surface area, equilibrium, and saturated adsorption capacity of aged PLA reached 15.826 m 2 /g, 1.184 mg/g, and 15.241 mg/g, respectively. Most of the adsorption of NOR on pristine and aged MPs was more aligned with the pseudo-first-order. The NOR was multiple adsorptions on the surface of aged PLA and aged PET, while it was monolayer adsorption on the surface of aged PP. In addition, it was different for the effect of pH, salinity, and dissolved organic matter (DOM) on the adsorption of NOR on different MPs. These results suggested that the chemical aging of MPs can enhance the adsorption capacity of MPs to NOR and promote the carrier effect of it to NOR.
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CELLULOSE
·
2023
·Vol. 30
·期 8
·5171-5185
·
IF 5.7
Zhao Bencheng,Li Chengze,Chen Yongfang,Tian Qiong,Yurekli Yılmaz,Qiu Fengxian,Zhang Tao
To handle the increasingly harsh living space caused by extreme temperatures and floods of electromagnetic waves, wearable materials have been attracting much attention for decades due to their good versatile compatibility and precise utility. In this work, a Janus MXene/cellulose/ZnO nanorods membrane for accurate on-demand personal thermal management and electromagnetic interference shielding was fabricated via hydrothermal treatment and vacuum-assisted filtration, followed by a hydrophobization process. The ZnO nanorod side of obtained Janus membrane exhibits a high visible reflectance (96.3%) and infrared emissivity in the atmospheric window band (0.837). The corresponding visible absorption and average infrared reflectivity (5–25 μm in wavelength) of the MXene side are over 90% and 0.7, respectively. Remarkable temperature differences on both sides (7 °C increment on MXene side and 5 °C reduction on ZnO side compared to bare wooden board) were achieved in the validation test under direct sunshine, reflecting to the great optical properties and radiative thermal management performances of the obtained membrane. Moreover, the water contact angles (≥ 120°) indicated the hydrophobicity and associated stain resistance of this membrane. Active Joule heating and electromagnetic interference shielding characteristics have been successfully introduced into the Janus membrane by means of the integration of MXene. A rapid increase in temperature to 75 °C was attained within a 1 min of low voltage (2 V) applying. The effectiveness of the electromagnetic shielding (~ 30 dB) was higher than the commercial shielding materials. The results in general, provide a promising solution to protecting people from temperature extremes and electromagnetic waves interference in modern living space.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 10
·1-12
·
IF 2.8
Zhao Jiaqi,Hu Chen,Fang Jiapeng,Sun Ruyi,Lu Jingyao,Su Shikun,Lei Zonghao,Fang Pengfei,Feng He,Degao Zhong,Teng Bing
In this work, a series of iso-structural eulyite-type Ba 3 Yb(PO 4 ) 3 :Tb 3+ solid solution phosphors were synthesized via high-temperature solid-phase method. The corresponding unit cell structure, luminescence properties, thermal stability, and chromaticity coordinates of the as-obtained phosphors were systematically investigated. The crystal structure of Ba 3 Yb(PO 4 ) 3 :Tb 3+ was refined by GSAS program, which indicates the oxygen ions in Ba 3 Yb(PO 4 ) 3 are disordered at one C3 site, and the oxygen atoms are distributed at two sites. Under 378 nm ultraviolet excitation, the emission peak of Ba 3 Yb(PO 4 ) 3 :Tb 3+ appears in the range of 450–650 nm, and a characteristic green emission peak appears at 542 nm. Moreover, the luminous intensity of the Ba 3 Yb(PO 4 ) 3 :14 at.% Tb 3+ sample at 160 °C is 87.7% at room temperature, and the quantum yield is 55.8%, which reveals good thermal stability. Our results suggest that the Ba 3 Yb(PO 4 ) 3 :Tb 3+ phosphors are promising high-efficiency green light conversion materials for UV-LED applications.
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Nano Research
·
2023
·Vol. 16
·期 5
·6568-6576
·
IF 9.9
Zhang Genrui,Li Xiaojing,Li Na,Wu Tingting,Wang Lei
Constructing 2D/2D face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites. Herein, 2D porous NiCo oxyphosphide (NiCoOP) was synthesized for the first time and coupled with graphitic carbon nitride (g-C 3 N 4 ) nanosheets to form 2D/2D heterojunctions via an in-situ phosphating method. The optimal 4 wt.% 2D/2D NiCoOP/g-C 3 N 4 (OPCN) photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h −1 ·g −1 , which is 33 times higher than that of pure g-C 3 N 4 . The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions. Amazingly, the 2D/2D OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions. This study not only designs new noble-metal-free NiCoOP/g-C 3 N 4 composite photocatalysts but also provides a new sight in fabricating face-to-face 2D/2D heterojunctions for their application in energy conversion areas.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Ba Ziyu,Luo Hongyun,Guan Juan,Luo Jun,Gao Jiajia,Wu Sujun,Ritchie Robert O.
High-performance, fast-growing natural materials with sustainable and functional features currently arouse significant attention. Here, facile processing, involving delignification, in situ hydrothermal synthesis of TiO 2 and pressure densification, is employed to transform natural bamboo into a high-performance structural material. The resulting TiO 2 -decorated densified bamboo exhibits high flexural strength and elastic stiffness, with both properties more than double that of natural bamboo. Real-time acoustic emission reveals the key role of the TiO 2 nanoparticles in enhancing the flexural properties. The introduction of nanoscale TiO 2 is found to markedly increase the degree of oxidation and the formation of hydrogen bonds in bamboo materials, leading to extensive interfacial failure between the microfibers, a micro-fibrillation process that results in substantial energy consumption and high fracture resistance. This work furthers the strategy of the synthetic reinforcement of fast-growing natural materials, which could lead to the expanded applications of sustainable materials for high-performance structural applications.
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高影响因子
BMC NEUROSCIENCE
·
2023
·Vol. 24
·期 1
·1-12
·
IF 2.4
Cai Jimin,Yang Yang,Han Jiahui,Gao Yu,Li Xin,Ge Xin
Background Microglial polarization and the subsequent neuroinflammatory response and oxidative stress are contributing factors for traumatic brain injury (TBI) plus hemorrhagic shock (HS) induced brain injury. In the present work, we have explored whether Lysine (K)-specific demethylase 4 A (KDM4A) modulates microglia M1 polarization in the TBI and HS mice. Results Male C57BL/6J mice were used to investigate the microglia polarization in the TBI + HS model in vivo. Lipopolysaccharide (LPS)-induced BV2 cells were used to examine the mechanism of KDM4A in regulating microglia polarization in vitro. We found that TBI + HS resulted in neuronal loss and microglia M1 polarization in vivo, reflected by the increased level of Iba1, tumor necrosis factor (TNF)-α, interleukin (IL)-1β, malondialdehyde (MDA) and the decreased level of reduced glutathione (GSH). Additionally, KDM4A was upregulated in response to TBI + HS and microglia were among the cell types showing the increased level of KDM4A. Similar to the results in vivo, KDM4A also highly expressed in LPS-induced BV2 cells. LPS-induced BV2 cells exhibited enhanced microglia M1 polarization, and enhanced level of pro-inflammatory cytokines, oxidative stress and reactive oxygen species (ROS), while this enhancement was abolished by the suppression of KDM4A. Conclusion Accordingly, our findings indicated that KDM4A was upregulated in response to TBI + HS and microglia were among the cell types showing the increased level of KDM4A. The important role of KDM4A in TBI + HS-induced inflammatory response and oxidative stress was at least partially realized through regulating microglia M1 polarization.
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FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 4
·1265-1274
·
IF 2.5
Yuan Yun,Bao Xueming,Wu Leilei,Wang Ping,Yu Yuanyuan,Wang Qiang
Due to the weak interaction between dye molecule and silk fiber, traditional acid dyeing of silk fabrics has some shortcomings such as high energy consumption and poor dyeing fastness. In the present work, in situ coloring of silk fabric was carried out via graft polymerization of caffeic acid (CA) by using a Fenton system consisting of FeCl 2 and H 2 O 2 . Subsequently, silver ions were reduced to silver nanoparticles (AgNPs) by poly(caffeic acid) (PCA) grafted in silk fibroin and deposited on the fiber surfaces, aiming at improving the antibacterial property of silk fabric. The results indicate that it is feasible to achieve in situ dyeing of silk fabrics under low temperature condition through graft polymerization of CA, and the color depth (K/S value) increases to 4.8. Meanwhile, the iron ions might further form coordination bonds with PCA and tyrosine residues in silk fibers, which can improve the washable resistance and wet rubbing fastness of the dyed fabrics, reaching the grade of 4–5. In addition, PAC grafted on silk fibers exhibits high reductivity, which can reduce silver ions and guide the AgNP deposition on the surface of silk fibers. This allows silk fabrics to achieve efficient and durable antibacterial effects, and the antibacterial rate remains above 98% even after cyclic washings. The present work provides a novel approach for in situ coloring and functionalization of silk fabrics without additional synthetic dyes or antibacterial agents.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2023
·Vol. 40
·期 4
·999-1013
·
IF 2.7
Gao Yan,Li Jinfeng
According to the requirements of flame retardant and environmental protection of wool fabrics, a phosphorus-nitrogen intumescent flame-retardant (IFR) system was constructed on the surface of wool fabrics based on dip-rolling-drying process with DEA serving as carbonizing agent, phosphorous acid and phosphoric acid used as acids, and urea serving as blowing agent. Ammonium N-ethoxy-n-methylene phosphonate-n-ethyl phosphate (ANPP) was designed and the treated wool fabrics with a weight gain (WG) of 27.4% presented highly flame retardancy and exhibited a high limiting oxygen index (LOI) of 37.8%; after 50 laundering cycles (LCs), LOI can still be remained at 30.5%. Self-extinguishing properties in the vertical combustion. The cone calorimeter (CONE) test verified that the peak heat release rate (PHRR) of the untreated wool fabrics declined to 82.2 from 251.7 kW/m 2 after ANPP treatment, and the total heat release (THR) was reduced to 4.4 from 37.9 MJ/m 2 . In addition, the physical properties were maintained in the usable range. The flame-retardant mechanism analysis showed that the dense phosphorus-nitrogen char layer shaped effectively prevented the release of heat and spread of flammable volatile substances in the condensed phase. This study supplies novel ideas on devising and manufacturing of environmentally friendly treated wool fabrics with superior flame retardancy, durability, and high efficiency.
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Nano Research
·
2023
·Vol. 16
·期 7
·9997-10003
·
IF 9.9
Yu Zhumin,Zhao Kai,Li Lin,Ye Changqing,Dong Yuxiang,Song Yanlin
Localized surface plasmon resonance (LSPR) has been widely used in medical detection because of its time effectiveness, non-invasiveness, high sensitivity, and relatively simple fabrication process. Porous anodic alumina (PAA) can be regarded as a plasma substrate for label-free detection due to its unique two-dimensional structure. In this work, a vivid Au-PAA composite film with the inverted taper structure was developed by multi-step anodic oxidation and pore-widening processes followed by magnetron sputtering with Au nanoparticles (AuNPs). The highly saturated and bright structural color was generated by the synergistic effect of photonic and plasmonic modes. Interestingly, various Au-PAA composite films with structural colors altering from purple to red were obtained via adjusting the height/diameter ratio of PAA. Benefiting from the inverted taper structure, light trap characteristics were effectively enhanced by increasing the incident light and reducing the diffuse light. In addition, a finite difference time domain (FDTD) model was proposed to predict the relationship between the reflectance peak and the height of the composite film, and the simulated data were in good agreement with the experimental results. As a proof of concept, label-free detections of various reagents (water, ethanol, glycol, glycerol, and glucose), the concentration of glucose (refractive index sensitivity of 376 nm/RIU, RIU: refractive index unit), and thrombin (detection limit of 0.1 × 10 −7 mol/L) were realized by the Au-PAA composite film. This vivid Au-PAA composite film provides a very powerful tool for in-situ label-free bio-detection.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Zhang Guangzhao,Chang Jian,Wang Liguang,Li Jiawei,Wang Chaoyang,Wang Ruo,Shi Guoli,Yu Kai,Huang Wei,Zheng Honghe,Wu Tianpin,Deng Yonghong,Lu Jun
The electrochemical stability window of the electrolyte solution limits the energy content of non-aqueous lithium metal batteries. In particular, although electrolytes comprising fluorinated solvents show good oxidation stability against high-voltage positive electrode active materials such as LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811), the ionic conductivity is adversely affected and, thus, the battery cycling performance at high current rates and low temperatures. To address these issues, here we report the design and synthesis of a monofluoride ether as an electrolyte solvent with Li-F and Li-O tridentate coordination chemistries. The monofluoro substituent (-CH 2 F) in the solvent molecule, differently from the difluoro (-CHF 2 ) and trifluoro (-CF 3 ) counterparts, improves the electrolyte ionic conductivity without narrowing the oxidation stability. Indeed, the electrolyte solution with the monofluoride ether solvent demonstrates good compatibility with positive and negative electrodes in a wide range of temperatures (i.e., from −60 °C to +60 °C) and at high charge/discharge rates (e.g., at 17.5 mA cm −2 ). Using this electrolyte solution, we assemble and test a 320 mAh Li||NCM811 multi-layer pouch cell, which delivers a specific energy of 426 Wh kg −1 (based on the weight of the entire cell) and capacity retention of 80% after 200 cycles at 0.8/8 mA cm −2 charge/discharge rate and 30 °C.
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危险品化学品经营许可证（带存储）