ACS Applied Polymer Materials
·
2024
·
IF 4.4
Hui Zhang,Chen Fu,Liu C. Yong,Nan Sun,Feng G. Liu
High-dielectric-constant poly(vinyl alcohol)/cellulose nanofibril (PVA/CNF) hydrogels were synthesized by a convenience method. An ultrahigh dielectric constant of approximately 4.58 × 109 was obtained for the designed flexible hydrogel at the frequency of 0.1 Hz, and the dielectric loss was also simultaneously about 2.02. The high dielectric constant probably originated from the interfacial polarization arising from the porous and cross-linked structure of the polymer. The abundant hydrogen bonds between PVA and CNFs promote the formation of cross-linked networks. Such materials may break the restrictions on the applications of traditional dielectric materials and expand the usage of dielectric polymers in broad fields.
研究领域:
材料科学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yinghui Liu,Xiaoxuan Zhang,Jingrui Rong,De Li,Shujun Lv,Xuejiao Sun
Aqueous zinc ion batteries (AZIBs) are garnering attention as a promising energy storage technology, boasting high energy density, low cost and high safety. Nevertheless, Zn dendrite growth and side reaction seriously affect the AZIBs cycle stability. In this paper, the interlayer separator design strategy is innovatively proposed, and a titanium dioxide fiber membrane (TiO 2 /CNF) with three-dimensional network structure is fabricated using the electrostatic spinning technique, which is used as an interlayer with filter paper to form a new type separator. The TiO 2 /CNF interlayer can suppress the side reaction and promote the uniform Zn deposition. As a result, the Zn||Zn symmetric cell with a current density of 2 mA cm −2 can maintain stable cycling for 650 h. Excitingly, the Zn||CVO full cell equipped with the TiO 2 /CNF interlayer separator achieves remarkably improved, and shows long-term stability of 200 cycles with 1.0 A g −1 current density.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 4
·660
·
IF 3.164
Xiu Wang,Zhihuai Yu,Huiyang Bian,Weibing Wu,Huining Xiao,Hongqi Dai
Adding heat conducting particles to a polymer matrix to prepare thermally conductive and electrical insulation materials is an effective approach to address the safety issues arising from the accumulation of heat in the working process of electronic devices. In this work, thermally conductive and electrical insulation nano-paper, consisting of Boron Nitride nano-sheet (BNNS) and cellulose nanofiber (CNF), was prepared using an aerogel 3D skeleton template method. For comparison, BNNS/CNF nano-paper was also produced using a simple blending method. At a BNNS loading of 50 wt%, the thermal conductivity of BNNS/CNF aerogel nano-paper and blended nano-paper at 70 °C are 2.4 W/mK and 1.2 W/mK respectively, revealing an increase of 94.4%. Under similar conditions, the volume resistivity of BNNS/CNF aerogel nano-paper and blended nano-paper are 4.0 × 1014and 4.2 × 1014Ω·cm respectively. In view of its excellent thermal conductivity and electrical insulation performance, therefore, BNNS/CNF aerogel nano-paper holds great potential for electronic-related applications.Keywords:BNNS;CNF;aerogel;3D skeleton;nano-paper;thermal conductivity;electrical insulation
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IET Nanobiotechnology
·
2019
·Vol. 13
·期 6
·565-570
·
IF 1.925
Jiajia Li,Lijie Zhou,Xiangdong Jiang,Sicong Tan,Peng Chen,Huan Zhou,Zhaoyang Xu
Carbon aerogels have attracted considerable attention in basic research and for their potential applications in many fields. Here, the fabrication of a magnetic cellulose nanofibre (CNF)/poly(vinyl alcohol) (PVA)/multiwalled carbon nanotubes (MWCNT) carbon aerogel (m-CPMCA) is reported using a simple freeze-drying followed by a carbonisation process, and direct immobilisation of Fe 3 O 4 nanoparticle on the surface of aerogels. The obtained target aerogel has the characteristics of low density (0.098 g/cm 3 ), high porosity (>90%) and 3D interpenetrating porous structures. Furthermore, m-CPMCA has a surprising compressive strength (about 0.35 MPa) which is obviously higher than many other cellulose-based carbon aerogels. After Carbonization, m-CPMCA exhibits superhydrophobicity, selective absorption for organic solvents and fire-resistance. The m-CPMCA also exhibited a magnetic response and can absorb oil on the water surface and can be actuated by a small magnet. More importantly, the m-CPMCA could be recycled many times by combustion, which showed economic significance. To sum up, the authors believe that m-CPMCA will become a very potential adsorbent for dealing with the increasingly serious problem of organic pollution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Simin Wang,Huijuan Xiu,Dingwen Yin,Jinbao Li,Gengmei Liu,Yuxin Qin,Feiguo Hua,Qingjun Meng,Minzhe Wu,Mengxia Shen
Achieving high shielding effectiveness in electromagnetic shielding materials relies heavily on high conductivity, yet simultaneously enhancing the absorption loss remains a persistent challenge. Consequently, the study successfully creates efficient electromagnetic shielding composite films with a unique grape-like bunch structure of hollow nanosilver (HCAF) through layer-by-layer assembly. The utilization of poly(dopamine) (PDA) to anchor nanosilver granules (AgNPs) onto cellulose nanofibers (CNF) results in the formation of CNF@PDA@AgNPs. Subsequently, a surface protection etching method is employed to etch the AgNPs, resulting in hollow nanosilver (H-AgNPs) and the generation of CNF@PDA@H-AgNPs. A composite film featuring a grape bunch structure is fabricated by interweaving high aspect ratio CNF with CNF@PDA@H-AgNPs. A substantial quantity of H-AgNPs creates an abundant interface, while the grape bunch structure establishes an efficient conductive network. That enables the composite film to exhibit excellent impedance matching, excellent conductivity loss, abundant polarization loss, and multiple reflection loss. Therefore, the conductivity of the composite film with a thickness of 148.8 μm reaches 212660 S/m, with SET, SEA, and SER 89.56, 79.03, and 10.53 dB in the X band, significantly better than the 76.9, 55.55, and 21.41 dB of the solid AgNPs composite film. The composite film also exhibits remarkable thermal conductivity (The coefficients of in-plane and out-plane thermal conductivity are 4.61 and 0.17 W/(m·K), respectively), mechanical properties, and strain sensing capabilities, making it significant potential for applications in flexible electronics and other related fields.
研究领域:
材料科学
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纳米技术
·
电磁干扰屏蔽
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柔性电子
·
热管理
·
传感器
✓ 已验证
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2024
·
IF 1.6
Yifei Gao,Jian Wang,Dehua Xu,Yuxuan Lin,Wenbao Song,Yubo Wang,Fei Xu,Gang Chen
In this article, polyether-modified polysiloxanes were synthesized by the reaction of poly(methyl hydrogen siloxane) (PMHS) with Allyl alcohol polyether B-400. FT-IR, laser particle size analysis, hydrophilic–lipophilic balance (HLB) value test, and surface tension measurements were used to characterize its structures and properties. The results show that the control law for the HLB value of polyether-modified polysiloxanes was obtained as follow: the HLB value increases with increasing hydrogen content of PMHS. When the polyether-modified polysiloxanes were used to emulsify the polysiloxane, at the HLB value of 10.5, the average particle size of the emulsion was about 0.23 μm with a narrow particle size distribution. The emulsion has good emulsifying and dispersing properties, as well as excellent foam elimination and foam inhibition performance. When the cellulose nanofibrils (CNF) was used as a protective agent for the preparing of the polysiloxane defoamer, the stability of the emulsion does not affect, but its foam elimination and foam inhibition of emulsion can be further improved at the presence of CNF. The lowest surface tension of CNF-enhanced polyether-modified polysiloxane defoamer is about 22.4 mN m −1 , which has good surface property. When the concentration of CNF-enhanced polyether-modified polysiloxane defoamer was 0.1 g L −1 , the foam elimination time and foam inhibition time were 5.8 s and 38 min, respectively, at the temperature (80°C) and alkali environment (pH 13).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
IET Nanobiotechnology
·
2018
·Vol. 12
·期 4
·500-504
·
IF 2.059
Zhaoyang Xu,Xiangdong Jiang,Sicong Tan,Weibing Wu,Jiangtao Shi,Huan Zhou,Peng Chen
In recent years, carbon aerogels have attracted much attention in basic research and as potential applications in many fields. Herein, the authors report a novel approach using bamboo powder as raw material to fabricate cellulose nanofibers (CNFs)/multi-walled carbon nanotubes (MWCNTs) carbon aerogels by a simple dipping and carbonisation process. The developed material exhibits many exciting properties including low density (0.056 g cm −3 ), high porosity (95%), efficient capability for separation of oily droplets from water, and high adsorption capacity for a variety of oils and organic solvents by up to 110 times its own weight. Furthermore, the CNF/MWCNT carbon aerogels (CMCA) can be recycled many times by distillation and combustion, satisfying the requirements of practical oil-water separation. Taken together with its economical, environmentally benign manufacturing process, sustainability of the precursor and versatility of material, the CMCA developed in this study will be a promising candidate for addressing the problems arising from the spills of oily compounds.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2019
·Vol. 12
·期 2
·322
·
IF 2.972
Ren’ai Li,Kaili Zhang,Guangxue Chen
Conductive paper has the advantages of being low-cost, lightweight, disposable, flexible, and foldable, giving it promising potential in future electronics. However, mainstream conductive papers are opaque and rigid, which seriously affect the wide application of conductive paper. In this paper, we demonstrate a highly transparent, flexible, and conductive paper, fabricated by mixing cellulose nanofibers (CNFs) with silver nanowires (AgNWs) and then plasticizing with choline chloride/urea solvent. The as-prepared CNF/AgNW paper showed high transparency (~90% transmittance) and flexibility (~27% strain), and low sheet resistance (56 Ω/sq). Moreover, the resistance change of CNF/AgNW paper increased only ~1.1% after 3000 bending−unbending cycles under a 150° large angle, implying a long working life and stability. In view of this, our methodology has the potential to open a new powerful route for fabrication of paper-based green electronics.Keywords:conductive paper;cellulose nanofiber;silver nanowires;choline chloride/urea
研究领域:
材料科学
·
纳米技术
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
·
2023
·
IF 3.3
Jing Wang,Yumin Song,Futong Cui,Wenbin Wu,Haodong Zhu,Xiaoping Li,Kunyong Kang
In this paper, using Styphnolobium japonicum, Cryptomeria fortunei and Pinus yunnanensis as raw materials, cellulose (CE) was first extracted by chemical method (CM1) and biological enzymatic method 2 (BM2), and then further prepared into nanocellulose fiber (CNF) by biological enzymatic method 1(CPM (CPM stands for cellulase and pectinase)). The CE and CNF were characterized by FTIR, XRD, SEM, DSC and TG. The results showed that the CNF prepared by CM1-CPM was cellulose type II, CNF prepared by BM2-CPM was cellulose type I. The best crystallinity of the CNF prepared by CM1-CPM reached 74.1% (C. fortunei CNF), the best yield was 24.0% (S. japonicum CNF) and the minimum average diameter was 62.6 nm (C. fortunei CNF). However, the best crystallinity of CNF prepared by BM2-CPM reached 80.1% (C. fortunei CNF), the best yield was 27.4% (C. fortunei CNF), and the minimum average diameter was 31.6 nm (C. fortunei CNF). And also, the thermal degradation analysis of the CNF prepared from the three raw materials revealed that the CNF prepared by BM2-CPM had better thermal degradability. Finally, the thermal stability analysis of the C. fortunei CNF was carried out, and it was found that the residual mass of CNF prepared by BM2-CPM was 48%, while the residual mass of C. fortunei CNF prepared by BM1-CPM was 22%, which showed the C. fortunei CNF prepared by BM2-CPM had better thermal stability. Therefore, the properties of nanocellulose prepared by BM2-CPM are optimal.
研究领域:
材料科学
·
生物学
·
林学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Can Luo,Ruyun Qiu,Gen Li,Xiaojun Shi,Zhifei Mao,Rui Wang,Jun Jin,Beibei He,Yansheng Gong,Huanwen Wang
Sodium-ion hybrid capacitors (SIHCs) are promising technology for energy storage because they combine the merits of high-energy batteries and high-power capacitors as well as naturally abundant sodium resource. However, conventional SIHCs consume a mass of electrolyte during the charge process, thus generating some side reactions at high potentials. In this work, we report a novel rocking-chair SIHC using Na 3 V 2 (PO 4 ) 3 /carbon composite nanofibers (denoted as “NVP@CNF”) as binder-free cathodes and SiO 2 -templated hollow carbon nanofibers (HCNF) as the capacitive anode. Resulting from the unique carbon-encapsulation configuration, the NVP@CNF cathode demonstrates excellent rate capability (105.8 mAh/g at 0.5C; 66.9 mAh/g at 100C) and long-term cycling stability (98% capacity retention after 2000 cycles) in sodium half-cells. The as-fabricated HCNF||NVP@CNF SIHC device delivers a high energy density of 216.4 Wh/kg at a power density of 381.8 W/kg. Even at an increased power density of 15272.7 W/kg, the energy density is still as high as 123.0 Wh/kg (based on the total mass of active materials in both electrodes). These results provide a new route to design various flexible self-supporting composite fiber electrodes through a simple electrospinning encapsulation strategy, which finally pushes the development of next-generation hybrid energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Qiufang Yao,Bitao Fan,Ye Xiong,Chao Wang,Hanwei Wang,Chunde Jin,Qingfeng Sun
A self-reporting aerogel toward stress sensitive slectricity (SSE) was presented using an interconnected 3D fibrous network of Ag nanoparticles/cellulose nanofiber aerogel (Ag/CNF), which was prepared via combined routes of silver mirror reaction and ultrasonication. Sphere-like Ag nanoparticles (AgNPs) with mean diameter of 74 nm were tightly anchored in the cellulose nanofiber through by the coherent interfaces as the conductive materials. The as-prepared Ag/CNF as a self-reporting material for SSE not only possessed quick response and sensitivity, but also be easily recovered after 100th compressive cycles without plastic deformation or degradation in compressive strength. Consequently, Ag/CNF could play a viable role in self-reporting materials as a quick electric-stress responsive sensor.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 35
·16308-16316
·
IF 6.97
Lihong Xu,Peixun Xiong,Lingxing Zeng,Yixing Fang,Renpin Liu,Junbin Liu,Fenqiang Luo,Qinghua Chen,Mingdeng Wei,Qingrong Qian
Exploring advanced anode materials with excellent electrochemical performance for rechargeable batteries, including lithium-ion batteries (LIBs), sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs), has attracted great attention. However, low electronic conductivity, severe particle agglomeration and lack of effective synthesis methods have still greatly hampered their rapid development. Herein, we initially fabricate a novel VSe1.5/CNF composite through a facile electrospinning method followed by selenization. The electrochemical measurements show that VSe1.5/CNFs can enable the rapid and durable storage of Li+, Na+, and K+ ions. When used as an anode material for LIBs, the VSe1.5/CNF composite delivers a high capacity of 932 mA h g−1 after 400 cycles at a high current density of 1 A g−1. In addition, for SIBs, the VSe1.5/CNF composite manifests a high reversible capacity of 668 mA h g−1 after 50 cycles and an excellent capacity of 265 mA h g−1 at 2 A g−1 even after an ultra-long 6000 cycles. This is one of the best performances of vanadium-based anode materials for SIBs reported so far. Most remarkably, the VSe1.5/CNF composite also demonstrates a satisfactory reversible K+ storage performance. The simple synthetic route and excellent ion storage properties make the VSe1.5/CNF composite a great prospect for application as an anode material for alkali metal ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）