INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tao Yuan,Zhen Zhang,Qian Liu,Xiu-Tong Liu,Shao-Qu Tao,Chun-li Yao
In recent times, there has been significant interest in the utilization of cellulose nanofiber (CNF) films as the foundation for supercapacitors due to their three-dimensional structure, flexibility and eco-friendliness. An ultrasonic and vacuum filtration method was used to prepare a hybrid film consisting of MXene (Ti 3 C 2 T x ), CNF and liquid metal (LM). The combination of CNF and LM with MXene produces a porous structure with higher electrical conductivity, which facilitates the transportation of ions and electrons within the composition and confers the material with heightened electrochemical properties. The CNF/MXene/LM electrode has a significant area capacitance of 871.3 mF cm −2 at a current density of 5 mA cm −2 . The hybrid film demonstrates excellent stability, maintaining a high conductivity of 546.4 S∙cm −1 and retaining 96.9 % capacitance after 2000 cycles at a current density of 10 mA cm −2 . By utilizing the thin film as an electrode, a high-performance quasi-solid supercapacitor was fabricated, with a remarkably thin thickness of only 0.319 mm. Supercapacitors show exceptional electrical properties, including a surface-specific capacitance of 188.2 mF cm −2 at a current density of 5 mA cm −2 . This study indicates that flexible electrodes made from cellulose nanofiber have extensive potential in the realm of supercapacitors.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2015
·Vol. 22
·期 4
·2341-2348
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IF 3.573
Rao Xianmeng,Kuga Shigenori,Wu Min,Huang Yong
Ball mill-assisted surface-fluorination of cellulose nanofiber was studied for two solvents with different polarity as dispersion/reaction medium. Milling cellulose in neat toluene gave irregular-shaped decrystallized cellulose particles; addition of pentafluorobenzoyl chloride (PFBC) to the system gave partially fluorinated cellulose as thin flakes with smooth surfaces, which maintained original crystallinity. Milling in neat dimethyl formamide (DMF) caused partial dispersion of nanofibers without decrystallization; milling in PFBC/DMF gave more enhanced dispersion of surface-fluorinated nanofibers. Both fluorinated materials were hydrophobic, with water contact angles of 103°–113°. Bulk degree of esterification was 0.20 for toluene and 0.57 for DMF systems. These results show characteristic influences of solvent species in reactive ball milling of cellulose in terms of fibrillation and surface esterification of nanofibers.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Aihua Qiao,Renliang Huang,Anastasia Penkova,Wei Qi,Zhimin He,Rongxin Su
Nanocellulose-based aerogels have gradually attracted attention in the field of oil/water separation owing to their light weight, excellent absorption properties, and environmental-friendliness. Herein, we report a facile and easily scalable method for fabricating superhydrophobic, elastic and anisotropic cellulose nanofiber (CNF) aerogels. Directional freeze-drying, soaking in polydimethylsiloxane (PDMS) solution and heat treatment were applied to obtain anisotropic and aligned CNF-PDMS aerogel sheets and blocks with superhydrophobicity and high elasticity. The CNF-PDMS aerogel sheets could realize continuous oil/water separation by filtration with a flux up to 2800 L·m −2 ·h −1 and a separation efficiency of 99.9%. The CNF-PDMS aerogel blocks could separate the oil/water mixture by the absorption–extrusion, and could also be applied in real-time continuous oil/water separation by vacuum suction with a flux as high as 145 L·h −1 ·g −1 and a separation efficiency of 99.9%. Overall, our anisotropic CNF-PDMS aerogels are the promising materials for low-cost rapid oil/water separation in multiple separation pathways.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Qindan Chu,Hao Lin,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
Polymer nanocomposites with excellent electromagnetic interference (EMI) shielding and thermal conductivity (TC) are urgently needed to solve the increasingly serious electromagnetic pollution and heat accumulation in devices. Herein, a distinct strategy was proposed to improve the dispersity of graphene nanoplatelets (GNPs) and integrate cellulose nanofiber (CNF), graphene nanoplatelets (GNPs), and MXene into a layered structure. The presence of MXene can improve the dispersity of GNPs, and the presence of GNPs can protect MXene from oxidation. By combining the excellent electrical conductivity of MXene and the high thermal conductivity of GNPs, the CNF/GNPs/MXene composite films exhibit excellent EMI shielding performance and high in-plane thermal conductivity. The electromagnetic shielding property of the CNF/GNPs/MXene composite films reaches 33.74 dB and the in-plane TC is 8.55 W/(m·K) when the total filler content is 50 wt % while the thickness of the composite film is only 38.5 μm. In addition, the mechanical properties of the composite membrane can meet general requirements. Therefore, these ultrathin CNF/GNPs/MXene composite films show great application potential as effective EMI shielding and thermal management materials.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Jie Zhou,Zhiqiang Fang,Kaihuang Chen,Jinyi Cui,Dongjie Yang,Xueqing Qiu
The degree of polymerization (DP) of cellulose plays an essential role in unlocking the superior mechanical potential of wood cellulose nanofibrils (CNFs). However, severe degradation of cellulose chains during the chemical pulping is a big challenge to obtain CNFs with high DP. In this work, we tend to improve the DP of wood CNFs by significantly preserving the native structure of wood fibers in an industrial method. Wood sticks are first pretreated with hydrothermal treatment to partially remove hemicellulose , thus leading to an increased porous structure that facilitates the penetration of cooking liquid and lignin removal during delignification , and dilute-alkali-sulfate pulping is then employed to obtain wood fibers with highest viscosity average DP (DP V ) of nearly 2400. After that, the as-prepared wood fibers with high DP are separated into CNFs with highest average DP V of 1333. Finally, we demonstrate the potential application of wood CNFs with improved DP V in the fabrication of strong and tough isotropic films and macrofibers.
研究领域:
材料科学
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林业工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Building Engineering
·
2022
·
IF 7.144
Ren Luo,Huai Liu,Ping Duan,Jiayuan Ye,Wei Chen,Zuhua Zhang,Aiguo Wang
As an alternative to the ordinary Portland cement (OPC), it is imperative to improve the performance of geopolymer under harsh conditions (such as sulfate/seawater attack). Sulfate attack is one of the reasons which cause deterioration and damages of geopolymer structures. Thus, the strategy of sulfate resistance attracts attention of researchers. As a reinforcement for geopolymer, the cellulose nanofiber (from waste bamboo powder) facilitates the utilization of waste bamboo powder. High-purity cellulose nanofiber (CNF) was obtained by using alkali, bleaching and acid hydrolysis treatments on waste bamboo powder. The purification effect and environmental impact of CNF were compared by different bleaching methods. The optimal conditions (containing 5 wt% H 2 O 2 , 0.04 wt% MgSO 4 and 0.05 wt% TAED) for CNF purification were determined. This work aims to investigate the effect of CNF and wollastonite (WS) on the sulfate resistance of metakaolin (MK) geopolymer. The deterioration mechanism of geopolymer reinforced by natural fiber (CNF and WS) exposed to sulfate environment was revealed by employing XRD , SEM and MIP . The influence of extreme sulfate environment on mechanical properties and microstructure was investigated. The analysis results of microstructure, mass loss rate and mechanical properties were also combined to evaluate the sulfate resistance. The outcomes show that the bleaching method of H 2 O 2 can effectively remove impurities and enhance the purification effect of CNF. The optimum mix proportion of MK geopolymer reinforced by natural fiber (formulated as 2% of CNF, 10% of WS and 88% of MK) is obtained. The compressive and flexural strengths are increased by up to 76.1% and 135.5% (compared to the control group), respectively. The deterioration of geopolymer is related to the concentration of Na 2 SO 4 and the immersion time. The degradation mechanism is attributed to the incomplete geopolymerization and the destruction of the pore structure due to sulfate attack exposure. The deterioration processes of geopolymer can be slowed down by introducing WS and CNF. It improves the sulfate resistance of the matrix from the structural aspect.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 34
·18323-18335
·
IF 11.9
Rui Cheng,Ying Wu,Bin Wang,Jinsong Zeng,Jinpeng Li,Jun Xu,Wenhua Gao,Kefu Chen
To shield significantly serious radiation pollution and reduce fire disasters, fire-retardant MXene-based electromagnetic interference (EMI) shielding nanocomposites featuring superb mechanical properties are highly desired, but remain a major challenge to prepare. Here, we propose a Janus structural engineering strategy to manufacture all-natural cellulose nanofiber (CNF)/montmorillonite (MMT)-supported MXene papers (CMMPs) using a sequential deposition followed by hot-pressing. Inspired by natural nacre, MMT nanosheets are incorporated into CNFs to construct a substrate layer with a “brick-mortar” layered structure that serves to provide mechanical properties, while the independent MXene layer ensures electrical conductivity. The resultant CMMPs exhibit extraordinary mechanical performances involving a mechanical strength of 272.7 MPa and Young's modulus of 10.8 GPa, high electrical conductivity, and a superb EMI shielding effectiveness of 56.1 dB and EMI SE/t of 19 140.8 dB cm−1. Moreover, the designed CMMPs possess impressive flame-retardant and electro-/photothermal heating features, demonstrating their reliability, safety, and versatility. Therefore, such high-performance CMMPs developed by a facile and sustainable preparation strategy possess substantial application prospects in EMI shielding, thermal management, and fire protection.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Jianming Wu,Qian Ma,Qingkai Pang,Shuaishuai Hu,Zhihao Wan,Xiangfang Peng,Xi Cheng,Lihong Geng
In recent years, there has been a lot of interest in developing composite hydrogels with superior mechanical and conductive properties. In this study, triple-network (TN) cellulose nanofiber hydrogels were prepared by using cellulose nanofiber as the first network, isotropic poly(acrylamide- co -acrylic acid) as the second network, and polyvinyl alcohol as the third network via a cyclic freezing-thawing process. The strong (9.43 ± 0.14 MPa tensile strength , (445.5 ± 7.0)% elongation-at-break), tough (15.12 ± 0.14 MJ/m 3 toughness), and conductive (0.0297 ± 0.00021 S/cm ionic conductivity) TN cellulose nanofiber hydrogels were effectively created after being pre-stretched in an external force field, cross-linked by Fe 3+ and added Li + . The produced composite TN cellulose nanofiber hydrogels were successfully used as a flexible sensor for real-time monitoring and detecting human movements, highlighting their potential for wearable electronics, medical technology, and human-machine interaction. Chemical compounds studied in this article Acrylamide (PubChem CID: 6579); Acrylic acid (PubChem CID: 6581); Ammonium persulfate (PubChem CID: 6579); N , N ′-methylene bisacrylamide (PubChem CID: 17956053); Sodium bromide (PubChem CID: 253881); Sodium hydroxide (PubChem CID: 14798); Sodium hypochlorite (PubChem CID: 23665760); Sodium chlorite (PubChem CID: 23668197); 2,2,6,6-tetramethylpiperidinyl-1-oxide (PubChem CID: 2724126); Polyvinyl alcohol (PubChem CID: 11199); Lithium chloride (PubChem CID: 433294); Iron nitrate nonahydrate (PubChem CID: 129774236)
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer-Plastics Technology and Materials
·
2023
·
IF 2.7
Qianyong Liang,Ying Pan,Jia Du,Dong Zhang,Yan Zhang,Zhishun Zhong,Hongting Zhao
Carbon sphere@layered double hydroxides filled cellulose nanofibers (ACS@LDHs/CNF) aerogel was successfully synthesized. The removal rate of Cr(VI) using ACS@LDHs/CNFs aerogel at a solid-liquid ratio of 1 g/L was 89.4%, which was higher compared to the removal rate of 65.2% using LDHs alone. The adsorption capacity of ACS@LDHs/CNFs for Cr(VI) was determined to be 44.9 mg/g. The adsorption kinetics followed the pseudo-second-order kinetic equation, and the isotherm data showed good agreement with the Langmuir model. The adsorption mechanism of Cr(VI) onto ACS@LDHs/CNFs aerogel was also investigated. Additionally, the ACS@LDHs/CNFs aerogel demonstrated consistent high adsorption efficiency over 4 consecutive cycles of adsorption-regeneration.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Afroza Akter Liza,Shihao Wang,Yanchen Zhu,Hao Wu,Lukuan Guo,Yungeng Qi,Fengshan Zhang,Junlong Song,Hao Ren,Jiaqi Guo
This study aimed to explore the synergistic mechanism of lignin chromophore modifications via UV treatment and to analyze the effects of mechanical treatments on LCNF properties for future uses. The procedure involved two steps: first, lignin's chromophore modification via UV illumination, and then the ball milling process was proceeded for 1 h, followed by high-intensity ultrasonic for 15–135 min. Characterization included preserved lignin content percentage, FTIR, UV–vis NMR, and color analysis for UV-modified samples, and to access the influence of mechanical treatment on LCNF samples further yield, zeta potential analysis, XRD, thermogravimetric analysis, atomic force microscopy, and scanning electron microscopy were performed. LCNFs S-120 demonstrated a zeta potential of −21.7 mV, indicating enhanced stability compared to the S-135 sample (−10.95 mV). The S-120 sample also showed the highest yield (74.02 %) and TGA at 391 °C. In XRD analysis, the S-120 sample demonstrated the highest CrI 64.3 %, than the S-15 sample (48.2 %). Preserved lignin in the LCNFs led to a slight reduction in crystallinity across all samples but improved thermal stability for all the prepared LCNFs samples. The UV and ultrasonication improved the homogeneity and durability of the LCNF samples, enabling a process that may be used to industries.
研究领域:
材料科学
·
林业工程
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Mei Long,Xiaohui Yang,Tao Shi,Yinye Yang
Developing an effective and user-friendly hemostatic agent is highly desired in the treatment of hemorrhage. Inspired by the natural nanostructure and abundant hydroxyl groups of cellulose and clay minerals, we designed an aerogel (HNTs/TOCNs) composed of halloysite nanotubes (HNTs) and TEMPO-oxidized cellulose nanofibers (TOCNs) with a hierarchical porous structure for the treatment of bleeding, using a simple and environmentally friendly self-assembly method. TOCNs formed a three-dimensional porous scaffold with excellent water-holding capacity. The incorporation of HNTs enhanced the hemostatic efficiency and mechanical properties of the 3D framework. The large interlayer spaces and wide channels within the HNTs/TOCNs aerogel provided rapid passage for blood, facilitating blood concentration and offering ample room for interactions between the HNTs/TOCNs aerogel and platelets, erythrocytes, and coagulation factors, thereby promoting hemostasis. Benefiting from the natural hemostatic properties and well-designed structure, the HNTs/TOCNs aerogel displayed excellent hemostatic performance both in vitro and in vivo . Notably, the hemostatic time of HNTs/TOCNs-2 was only 74 ± 8 s, which is approximately 50 % shorter than the blank control (151 ± 20 s) in liver femoral artery injury model. This design of an HNTs/TOCNs aerogel presents a unique opportunity to enhance hemostatic efficacy by synergizing the advantages of natural materials.
研究领域:
生物医学工程
·
材料科学
·
止血材料研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Qiyue Zhao,Hong-Man Hou,Gong-Liang Zhang,Hongshun Hao,Bei-wei Zhu,Jingran Bi
Heterocyclic aromatic amines (HAAs), arising as chemical derivatives during the high-temperature culinary treatment of proteinaceous comestibles, exhibit notable carcinogenic potential. In this paper, a composite aerogel (AG D-UiO-66 ) with high-capacity and fast adsorption of HAAs was made with anchoring defective UiO-66 (D-UiO-66) mediated by lauric acid on the backbone of cellulose nanofibers (CNF). AG D-UiO-66 with hierarchical porosity reduced the mass transfer efficiency for the adsorption of HAAs and achieved high adsorption amount (0.84–1.05 μmol/g) and fast adsorption (15 min). The isothermal adsorption model demonstrated that AG D-UiO-66 belonged to a multilayer adsorption mechanism for HAAs. Furthermore, AG D-UiO-66 was successfully used to adsorb 12 HAAs in different food (roasted beef, roasted pork, roasted salmon and marinade) with high recoveries of 94.65%–104.43%. The intrinsic potential of AG D-UiO-66 demonstrated that it could be widely applicable to the adsorption of HAAs in foods.
研究领域:
食品科学
·
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）