FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 2
·771-778
·
IF 2.5
Li Mengmeng,Xu Qiuyu,Jiang Wei,Farooq Amjad,Qi Yirui,Liu Lifang
Herein, Fe 3 O 4 nanoparticles and graphene oxide (GO) are compounded first, followed by the addition of cellulose nanofiber (CNF) and l -ascorbic acid, to obtain Fe 3 O 4 @reduced graphene oxide (rGO)/CNF foams via the freeze-drying method. The electrical conductivity and magnetism of as-prepared foams were improved due to the presence of rGO and Fe 3 O 4 , which is suitable for electromagnetic interference (EMI) shielding material. The results exhibit that Fe 3 O 4 @rGO/CNF foams all possess a porous structure, and the optimized foam shows an EMI shielding effectiveness value of ~ 23 dB in the X-band. The good EMI shielding performance of the Fe 3 O 4 @rGO/CNF foam originates from the synergy of its composition and structure. This work could provide a reference for the design and fabrication of novel EMI shielding materials.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Sun Yiwei,Luo Yuting,He Yuyang,Wang Haoxiang,Wang Ruoyu,Lu Mengqi,Li Ke,Wu Siqi,Wei Sucan,Song Huiqiao,Xu Dongpo
A highly efficient electrochemical molecularly imprinted sensor for the detection of chloramphenicol (CAP) was prepared using carbon nanofibers (CNFs). The conductivity and large surface area of CNFs improved the electrochemical detection performance while providing more binding sites for chloramphenicol molecularly imprinted polymers. CNF@MIP was prepared using polypyrene as the functional monomer and chloramphenicol as the template molecule. The electrochemical performance of CNF@MIP was evaluated with cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under optimized conditions, CNF@MIP exhibited a wide detection range (0.1–100 nM), low detection limit (1.15 pM), and good selectivity, stability, and reproducibility. In addition, CNF@MIP can be used to detect chloramphenicol in milk samples.
研究领域:
分析化学
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食品科学
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生物医学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lili Zhu,Hao Zhang,Zuming Hu,Junrong Yu,Yan Wang
To acquire excellent wave-absorbing materials with broadened applications, transition metal carbides (Ti 3 C 2 T x , MXene) have been the research focus. However, the high conductivity of MXene limits its electromagnetic wave (EMW) absorption capability; meanwhile, the inferior mechanical properties of MXene-based aerogels severely restrict their applications. Here, porous MXene (PMXene) nanosheets were prepared by hydrogen peroxide etching, which was then physically and chemically crosslinked with cellulose nanofibres (CNF) to successfully prepare PMXene/CNF composite wave-absorbing aerogels with excellent mechanical properties. PMXene/CNF aerogel achieved a minimum reflection loss (RL min ) of − 72.27 dB and an effective absorption bandwidth (EAB) of 5 GHz at a thickness of 1.63 mm without any magnetic component. The aerogels exhibited excellent environmental stability at a density of 12.5 mg/cm 3 , including fatigue resistance (100 compression cycles, 0.075 energy loss efficiency) and low-temperature resistance. Refining the mechanical properties exploits the aerogel’s potential for motion monitoring and electronic skin applications. In addition, the aerogels integrate properties such as water–oil separation, photothermal conversion, and thermal insulation (thermal conductivity of 0.045 W/(m-K)). Therefore, multifunctional PMXene/CNF aerogels have a broad potential for future application in the defence industry, electronic devices, and smart wearable fields.
研究领域:
材料科学
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电磁学
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环境科学
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机械工程
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DOI
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Ma Hailong,Wang Wenbo,Yu Wei,Kong Fangong,Wang Shoujuan,Liu Keyin,Zhou Zhe,Wei Guijuan,Wang Xiaohui,Liu Yu
Nanocellulose, which can be derived from abundant renewable plant sources, possesses outstanding properties such as nano-size, high strength, and high reactivity, rendering it a promising alternative to fossil-based materials in the future. However, the conventional drying of nanocellulose aqueous suspensions tends to result in significant aggregation, which substantially impedes the functionalization of nanocellulose by organic modifying reagents. This study presents an innovative method for drying nanocellulose from aqueous suspension into ultrafine powders while preserving its nanoscale properties. Ammonium bicarbonate was introduced into the aqueous suspension of cellulose nanofibrils (CNFs) to precipitate CNFs that were then dispersed in n-butanol. During the evaporation process, the ammonium bicarbonate decomposed, and the water evaporated, leading to the drying of CNFs in pure n-butanol into an ultrafine powder with high dispersibility. When prepared with a large amount of n-butanol, these ultrafine powders demonstrate enhanced redispersibility in water, with the ability to form a stable suspension through simple agitation. Our research in this paper centers on elucidating the dispersion mechanism of CNF ultrafine powders. We suggest that CNF ultrafine powders dried from n-butanol form a loosely porous mesoporous structure. In the absence of significant changes in crystallinity, the substantial reduction in the inaccessible area of the amorphous regions is likely responsible for their enhanced redispersibility in water. Additionally, by capitalizing on the micro- and nano-structural characteristics of CNF ultrafine powders, we have successfully developed a superhydrophobic coating by applying hydrophobic modification and adhering the treated powder to the surface of filter paper. This outcome not only substantiates the practical applicability of CNF ultrafine powders but also affirms their micro- and nano-dimensional structural attributes. This paper proposes a straightforward and viable approach for the reaction of functionalized organic reagents with nanocellulose, thereby significantly broadening its potential applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ACS Sensors
·
2026
·Vol. 11
·期 7
·6157-6166
·
IF 10.9
Lu Jiaqi,Chen Xiangdong,Ding Xing,Liu Yanchang,Zhong Jialun,Liu Fang,Li Han,Li Guoping
Respiratory infectious diseases continue to pose a serious threat to public health. Their transmission relies on respiratory droplets that are small in size and evaporate rapidly, making real-time monitoring difficult. In this study, we propose a flying droplet sensor based on hydroxylated graphene quantum dots (H-GQDs) deposited on a cellulose nanofiber (CNF) film. Owing to the network water-locking structure of the film, the sensor is capable of detecting coughing droplets transmitting over long distances (≥2.4 m). By placing multiple such sensors at equal intervals along the cough airflow direction, the spatiotemporal transmission features of coughing droplets were obtained, including arrival time and signal intensity at different distances. On this basis, we investigated the transmission behavior of cough droplets from multiple individuals at various distances. The results show that regions close to the volunteer’s mouth exhibit a broader droplet size distribution, whereas at longer distances, the remaining droplets are mainly composed of small-size and low-intensity components. We further found that coughing droplets typically take 4−5 s to travel more than 2 m, indicating that a time window for timely protection still exists at this distance. In addition, the relationships between cough sound level and droplet signal intensity as well as transmission time were evaluated. No clear correlation was observed, suggesting that acoustic indicators alone cannot directly reflect the infection risk associated with cough droplet transmission. This study provides important insights for the real-time monitoring and protection against respiratory droplet transmission.
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Kaihuai Duan,Tao Yang,Zhongyou Xu,Yijie Sun,Huiyun Hu,Hu Yang,Zhenliang Xu
Self-supporting and degradable (Zn-MOF/SA/CNF) acts as multifunctional photoactive membrane. • Zn-MOF acts as a porous skeleton to enhance flux, SA as a binder, and CNF as a photo-Fenton catalyst. • Membrane shows 96–98% rejection of dye, 80% rejection of tetracycline and a flux of 50–60 L‧m −2 ‧h −1 ‧bar −1 . • Membrane shows antibacterial property, photo-Fenton induced flux recovery and acid-triggered regeneration. In this study, self-supporting multifunctional photoactive membranes with a sandwich structure were prepared via a green route using eco-friendly materials for water treatment. The Zn-BDC synthesized at 25 °C was employed to construct a strippable skeleton with high flux. Sodium alginate (SA) acted as both a binder and cavity filler to repair defects and enhance tensile properties. Meanwhile, C₃N₄-Fe₂O₃ (CNF) was synthesized and applied as a photo-Fenton catalyst. The results showed that both the membrane with SA on the top (MCS) and the membrane with SA in the middle (MSC) achieved over 98% rejection toward Congo red, Alcian blue, and nickel(II) phthalocyanine-tetrasulfonic acid tetrasodium salt, with a flux ranging from 50 to 70 L·m −2 ·h −1 ·bar −1 . While the MSC membrane displayed better photocleaning performance and mechanical flexibility than the MCS membrane. Its flux could be restored via the photo-Fenton reaction. Moreover, the MSC membrane also attained over 80% rejection of tetracycline with the assistance of the photo-Fenton reaction. Furthermore, the membrane showed over 95% dye rejection in ethanol and exhibited favorable antibacterial performance. In addition, the membrane could be dissolved in a citric acid solution, which offers a convenient strategy for membrane disposal or recycling. Collectively, this work provides a green and sustainable membrane candidate for water treatment applications. Download: Download high-res image (129KB) Download: Download full-size image
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ziyan Liu,Junrong Chen,Yuanlan Wang,Wenqing Zhang,Wenlei Wang,Jing Wang
The photocatalytic reduction of CO 2 to CO is often constrained by suboptimal visible-light harvesting, interfacial recombination losses, and durability under repeated cycling. Here we design a Bi–BiOBr@CNF architecture that integrates metallic Bi (for plasmon-assisted excitation and interfacial electron transfer), oxygen/bromine vacancies (for CO 2 adsorption/activation), and a conductive CNF network (for dispersion and transport). Photoelectrochemical characterizations elucidate the synergistic mechanism. Under visible light, the catalyst delivers CO as the single detectable product with high selectivity; cycling tests reveal performance decay that is mechanistically linked to defect evolution, and a moderate-temperature regeneration restores activity. The results elucidate the respective roles of Bi 0 , O V , Br V , and the CNF scaffold within an integrated mechanistic framework, and indicate a viable strategy for durable photocatalytic reduction of CO 2 to CO.
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DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 7
·3789-3804
·
IF 4.21
Xu Wenlong,Xin Binjie,Yang Xue
Polyacrylonitrile (PAN)/cellulose nanofibril (CNF) based carbon nanofiber membranes were produced by electrospinning and carbonization method, in which the CNF amount was 1 wt%. In order to control the spinning process, the rheological properties of the PAN/CNF suspensions were measured before electrospinning. In addition, the effects of CNF particle size on the structure and properties of carbon nanofiber membranes were investigated systematically by SEM, FTIR and mechanical test. Meanwhile, the reaction mechanism of PAN and PAN/CNF nanofiber membranes in the process of stabilization and carbonization was also fully discussed. The results show that the addition of CNFs can improve the breaking strength and conductivity of PAN carbon nanofiber membrane. Moreover, CNFs also can accelerate the carbonization rate and reduce the reaction conditions of PAN nanofiber membranes. Therefore, CNFs are effective enhancers for PAN based carbon nanofiber membranes.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hong Wang,Jingyu Zhou,Jun Sun,Yan Wang,Yuejin Ma,Zelin Bai,Yajun Zhao,Wenming Zhang
Coaxial core-shell hierarchical flower-like cobalt oxide@doped-Sn carbon nanofiber (Co3O4@Sn-CNF) prepared by loading Co3O4 shells on Sn-CNF that were synthesized via electrostatic spinning and subsequently thermally treated by electrophoretic deposition were used as the anode material for lithium- ion batteries in this paper. The Co3O4 shells were not solid but flower-like, provided abundant inner space, facilitated the transfer of lithium ions and electrons and the contact with the electrolyte via the increase in space, increased the electrochemical reaction sites, and improved the electrochemical performance. After the initial discharge specific capacity of 1519 mAh g -1 , the discharge specific capacity of the Co3O4@Sn-CNF reached 1000 mAh g -1 without an obvious capacity decay, and the coulombic efficiency reached 98.6%, indicating the excellent cycle stability of this material. In addition, a specific capacity recovery of 90% demonstrated a remarkable rate performance. The improvement in the electrochemical performance was due to the introduction of the Sn-CNF, which had a good electroconductivity and mitigated the volume deformation due to the elastic deformation of the CNF, in addition to the unique and firm structure.
研究领域:
材料科学
·
电化学
·
纳米技术
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Tiantian Dai,Yanting Liu,Dandan Rong,Meng Wang,Zhenkun Qi,Yinling Zhao,Xiandi Wang,Qing Yang,Lei Wei,Mengxiao Chen
Inspired by natural organisms, soft actuators can convert environmental stimuli into mechanical deformation, making them indispensable for applications in a variety of fields such as soft robotics. MXene, displaying exceptional attributes in conductivity, thermal efficiency, good dispersibility etc., has emerged as a preferred material for high-performance thermal actuators. However, single actuators struggle to achieve complex tasks realized by intelligent robotic systems. Herein, a bioinspired dynamic matrix is presented utilizing the developable structure of MXene-cellulose nanofibers (CNF) soft actuators. The inclusion of CNF considerably bolsters the mechanical properties of MXene. The MXene-CNF film possessed a higher working strain range (≈14%) than pure MXene film (≈2%). The designed developable structures complete the actuating movements. The sensing layer integration with the actuating layer led to an extremely low touch detection limit (0.3 kPa) and expedited actuating-feedback due to the interaction between contact charging and electrostatic induction. A responsive dynamic matrix containing 3 × 3 soft actuators, completed with a close-looped sensing-feedback function, is developed similar to the behavior of the mimosa plant. This mimosa-inspired dynamic matrix is capable of identifying the source of touch stimuli and providing immediate feedback. This research broadens the potential for enhancing adaptability and intelligence of soft robotic system.
研究领域:
材料科学
·
仿生学
·
软体机器人
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Bincheng Huang,Qiang Fu,Yuxiao Wang,Yunchen Du,Xianjie Wang,Peng E
Modern communications infrastructure has given rise to significant levels of electromagnetic wave interference (EMI), leading to increased requirements for the preparation of multifunctional EMI shielding composites. Ti3C2TX aerogels are well-studied materials to achieve this, with the abundant functional groups of hydroxylated nanocellulose able to achieve sufficient electromagnetic wave attenuation. This article reports that samples of NC/35C/25M6 achieved an EMI SE of 30.3 dB and an SSE/t of 2346 dB cm2g−1 using 1.15 g of conductive fillers with a density of only 0.06 g/cm3. In addition, the photothermal conversion properties of this material contribute to efficient energy utilization, demonstrating the multiple functionality of Ti3C2TX aerogels. Therefore, these ultralight, low-cost and multifunctional aerogels meet the requirements of EMI shielding and photothermal conversion, providing a valuable method for the fabrication of EMI shielding composites.
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 14
·2028
·
IF 4.7
Chao Du,Yangyang Zhang,Jiangmin Lin,Guotao Fan,Can Zhou,Yan Yu
Polymeric positive temperature coefficient (PTC) materials with low switching temperature points are crucial for numerous electronic devices, which typically function within the room temperature range (0–40 °C). Ideal polymeric PTC materials for flexible electronic thermal control should possess a room-temperature switching temperature, low room-temperature resistivity, exceptional mechanical flexibility, and adaptive thermal control properties. In this study, a novel PTC material with a room-temperature switching temperature and superb mechanical properties has been designed. A blend of a semi-crystalline polymer EVA with a low melting temperature (Tm) and an amorphous polymer (PVAc) with a low glass transition temperature (Tg) was prepared. Low-cost graphite was chosen as the conductive filler, while CNF was incorporated as a hybrid filler to enhance the material’s heating stability. PVAc0.4/EVA0.6/GP-3wt.% CNF exhibited the lowest room temperature resistivity, and its PTC strength (1.1) was comparable to that without CNF addition, with a Curie temperature of 29.4 °C. Room temperature Joule heating tests revealed that PVAc0.4/EVA0.6/GP-3wt.% CNF achieved an equilibrium temperature of approximately 42 °C at 25 V, with a heating power of 3.04 W and a power density of 3.04 W/cm2. The Young’s modulus of PVAc0.4/EVA0.6/GP-3wt.% CNF was 9.24 MPa, and the toughness value was 1.68 MJ/m3, indicating that the elasticity and toughness of the composites were enhanced after mixing the fillers, and the mechanical properties of the composites were improved by blending graphite with CNF.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
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