Molecular Catalysis
·
2023
·
IF 4.6
Yi Liu,Shuangjiang Li,Xiaojian Yu,Ying Chen,Xiaoning Tang,Tianding Hu,Lan Shi,Manoj Pudukudy,Shaoyun Shan,Yunfei Zhi
For the simultaneous attainment of the utilization of renewable biomass resources and the mitigation of greenhouse effects, it is very promising to develop a green, recyclable, and highly efficient heterogeneous catalyst for the synthesis of cyclic carbonates by CO 2 cycloaddition reaction with epoxides. Herein, novel cellulose nanofibers (CNF) supported (Salen)Cr(Ⅲ) complex was effectively synthesized for the aforementioned reaction. The cellulose nanofibers (CNF) were firstly modified with (3-aminopropyl) triethoxysilane (APTES), and then its Schiff base with salicylaldehyde was synthesized, which further subjected to coordination treatment with chromium chloride to form a novel heterogeneous catalyst, labelled as CNF-(Salen)Cr(Ⅲ). The catalytic performance of the catalysts shown that CNF-(Salen)Cr(Ⅲ) and co-catalyst TBAB can synergistically catalyze the cycloaddition of CO 2 with epichlorohydrin (ECH) at mild reaction conditions, and the yield of chloropropene carbonate (CPC) reached up to 97.8% with high selectivity. The CNF-(Salen)Cr(Ⅲ) complex maintained high catalytic activity after six cycles of repeated runs and has acceptable catalytic effect on other series of epoxies. Based on density functional theory (DFT) calculations, a reaction mechanism including adsorption activation of epoxides, epoxides ring opening, CO 2 insertion, and the formation of cyclic carbonate, was proposed for the CNF-(Salen)Cr(Ⅲ) complex catalyzed cycloaddition of CO 2 with epoxides.
研究领域:
绿色化学
·
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chunyong Zhang,Lei Su,Linna Huang,Jiehong Cheng,Jianning Li,Hengfei Qin
The carbon nanofiber composite containing Cu and MnO was fabricated by electrospinning method. The precursor solution was prepared by mixing Cupric Acetate Monohydrate, Manganous acetate, N,N-dimethylformamide (DMF) and polyacrylonitrile in a certain proportion. Then the material of Cu- MnO/CNF with higher capacitance was prepared by electrostatic spinning at 15 kV and high temperature heat treatment. The Cu-MnO/CNF was characterized by scanning electron microscopy (SEM) and X-Ray diffraction (XRD). It’s clear from the results that, carbon nanofiber had overlaped by metal oxides and metals, at the same time, the Cu(OAc) 2 was converted to Cu and the MnACAC was turned into MnO after thermal treatment. Through a series of electrochemical tests, it showed the Cu-MnO/CNF has excellent electrochemical performance and indicated its potential advantages for supercapacitors. The results indicated the specific capacitance of the Cu-MnO/CNF displayed a larger specific capacitance of 581 F/g than the electrical capacity of Cu-CuO/CNF and MnO-Mn(OH) 2 /CNF
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Polymers
·
2025
·Vol. 18
·期 1
·126
·
IF 4.9
Adila Abdirym,Xue Wu,Bin Liu
This work investigated the stabilization mechanisms and β-carotene encapsulation characteristics of cellulose nanofibrils (CNFs) stabilized Pickering emulsions (PE) prepared by different emulsification processes. For 48 days of storage, ultrasound-prepared Pickering emulsions (US-PE) stabilized by at least 2.0 wt.% CNFs have obvious cream stabilization, and high-pressure homogenization-prepared Pickering emulsions (HPH-PE) stabilized by over 1.6 wt.% CNFs have excellent cream stabilization. The stabilization of HPH-PE, which was superior to that of US-PE, mainly relied on the steric stabilization of CNFs’ space networks. Although the encapsulation efficiency of β-carotene in US-PE was higher than that in HPH-PE when the CNF concentration was over 1.2 wt.%, the retention rate of β-carotene in US-PE was obviously lower than that in HPH-PE. So, the internal space structure of CNF-stabilized HPH-PE was conducive to stabilizing the emulsion and protecting the bioactive molecule.
研究领域:
食品科学与技术
·
纳米技术
·
胶体化学
·
封装技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jiahua Chen,Xinyi Chen,Baoquan Zhang,Li He,Xinjian Li,Yingzhan Li,Zhen Zhang,Ying Zhou,Wanhui Jin,Xia He,Hongchen Liu
The development of a thermoplastic , biodegradable composite material to replace conventional polymers derived from petroleum was the main area of concentration. Herein, a method for preparing antibacterial, UV-blocking and degradable CNF/Lignin/PBAT composite films (CLP) using cellulose nanofibrils (CNF), lignin, and Poly (butylene adipate-terephthalate) (PBAT) as raw materials by solution casting method was described. With the adding of PBAT , the thermal stability, thermoplastic , mechanical properties were enhanced by improving the compatibility between components. The maximum tensile strength of CLP could reach 189.72 MPa, which increased 25.5 % compared to CNF/Lignin film. The average initial decomposition temperature could reach 321 °C, which was much higher than that of CNF and lignin. At the same time, its good heat-sealing performance made it suitable for practical use. Meanwhile, the composite films had excellent UV resistance and could block over 95 % of UV light. The antibacterial results indicated that the films had a good inhibitory effect on E. coli and S. aureus , with a maximum inhibitory ring diameter of 5.56 and 6.36 mm. In addition, the composite film also had excellent barrier capability to liquid and gas. The prepared film had potential to produce flexible packing, industrial compositing and biomedical fields .
研究领域:
材料科学
·
生物医学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Ye Zhang,Kai Yan,Yi Jiang,Shengda Liu,Jiayin Zhan,Guixia Liu
Among strategies for protecting anodes in aqueous Zn-ion batteries (AZIBs), the slurry coating method is widely used to construct protective layers. However, conventional slurry coating processes often inevitably employ organic solvents, which contradicts the inherently environmentally friendly nature of AZIBs. This study proposes a “hydrophilic substrate modification–aqueous dispersion spraying” strategy for protective layer construction: a hydrophilic Zn foil (H–Zn) was prepared through a UV/O3 cleaning process, and carboxylated cellulose nanofibers (CNF) were spray-coated onto the H–Zn substrate using ultrapure water as the sole dispersion medium, successfully fabricating an H–Zn@CNF anode. The entire process was conducted without any organic solvents, offering distinct eco-friendly advantages. Symmetrical cell tests demonstrated excellent cycling stability of the H–Zn@CNF anode: it achieved stable cycling for 2500 h (vs bare Zn, 184 h) at 1 mA cm–2/1 mAh cm–2 and for 1250 h (vs bare Zn, 50 h) at 2 mA cm–2/1 mAh cm–2. The enhanced stability originates from the dual functions of the CNF protective layer: first, it isolates the Zn substrate from active water molecules in the electrolyte, suppressing hydrogen evolution reactions and the formation/accumulation of byproducts; second, the carboxyl groups on CNF molecular chains promote the desolvation of [Zn(H2O)6]2+, facilitating rapid and uniform deposition of Zn2+ and thereby inhibiting Zn dendrite growth. This study achieves a green preparation route for highly stable AZIB anodes and provides a novel approach for promoting the environmentally friendly fabrication and industrial application of aqueous batteries.
✓ 已验证
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Huixiang Wang,Xinchao Yang,Jing Wang,Ya Lu
Flexible supercapacitors have emerged as promising energy storage devices, owing to their high power density and long cycle life. However, the development of electrode materials with high specific capacitance, superior electrochemical and mechanical stability remains a critical challenge. In this work, we report a facile strategy for fabricating cellulose nanofiber (CNF)-carbon nanotube (CNT)@polyaniline (PANI) nanocomposite aerogels via TEMPO oxidation, freeze-drying, and in-situ polymerization. The CNFs serve as a dispersive scaffold to uniformly distribute CNTs, forming a three-dimensional (3D) interconnected network, while PANI coats the CNF-CNT hybrid to construct a core-shell structure, enhancing pseudocapacitive performance. The resulting CNF-CNT@PANI aerogel exhibits a hierarchical porous structure with a high specific surface area of 121.4 m 2 g -1 and low density of 12.8 mg cm -3 . The assembled flexible supercapacitors deliver a high areal specific capacitance of 722.4 mF cm -2 at 2 mA cm -2 , long-term capacitive cyclic stability (86% capacitance retention after 3000 cycles), and remarkable mechanical stability (95.2% capacitance retention after 200 bending cycles). Additionally, the device achieves a maximum areal energy density of 99.5 μWh cm -2 at a power density of 1005.4 μW cm -2 , outperforming many reported PANI-based supercapacitors. This work provides a feasible approach for designing high-performance flexible electrode materials for next-generation energy storage systems.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Ao Wang,Zhenqiu Gao,Shaokuan Wu,Yihan Wei,Bohan Lu,Jia Shi,Lanyue Shen,Yina Liu,Xuhui Sun,Zhen Wen
In the face of complex pressure stimuli, pressure sensor is required to sense the magnitude of static force and sensitive to transient mechanical stimuli. However, an individual sensing mechanism has difficulty meeting practical needs simultaneously. In this work, an MXene/cellulose nanofiber (CNF) aerogel@PDMS-based dual-modal pressure sensor is reported for complex stimuli monitoring. The aerogel-based sensing material is fabricated through MXene nanosheets and CNFs. Aerogel ice crystals sublimate and then form a 3D porous structure during vacuum freeze-drying. After attaching PDMS dilution, aerogels achieve >200 reversible compressions, and hysteresis energy is reduced by 57.8%. By utilizing both triboelectric and piezoresistive properties of MXene/CNF aerogel@PDMS, a dual-modal pressure sensor is achieved. The triboelectric effect acquires high sensitivity of 26.95 kPa −1 under low pressure (3.46 Pa–3.32 kPa) and responds to vibrations up to 1000 Hz. On the basis of variable resistances of aerogels, the piezoresistive effect can be used to identify static pressures stably (167 kPa −1 , 1.56–26.64 kPa). Combining two effects broadens the lower limit of high-sensitivity monitoring, realizing static-dynamic detection simultaneously and breaking the frequency limit of piezoresistive materials. Finally, the dual-modal pressure sensor is demonstrated to monitor complex physiological and physical signals, such as pronunciation, gestures, and tone recognition.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Rui Xiao,Changgeng Li,Lu Wu,Lingzhi Huang,Wenchao Jia,Bing Wang,Xueru Sheng,Pedram Fatehi,Haiqiang Shi
To address the poor water resistance and mechanical degradation of conventional paper straws, this study develops an environmentally benign, fully biodegradable superhydrophobic coating using cellulose nanofibers (CNF), stearic acid (SA) and citric acid (CA). CNF was first dispersed in ethanol, followed by chemical grafting of hydrophobic alkyl chains onto its surface; a synergistic micro-nano hierarchical structure was then constructed by optimizing thermal soaking and drying processes. The hybrid material's morphology was comprehensively characterized via FTIR, SEM, and AFM. The resulting coating exhibited exceptional superhydrophobicity (water contact angle, WCA = 166°), effectively resisting liquid penetration and maintaining structural integrity under humid conditions. Mechanical tests showed 216 % higher tensile strength, 137 % improved compressive performance, enhanced abrasion resistance, and better water vapor barrier properties; notably, it retained 83.67 % of dry strength after water immersion and degraded rapidly in soil. The coating formulation was further engineered into a curcumin-loaded film, thereby adding a smart, visual pH-indication function for monitoring beverage freshness over 0–6 days. This multifunctional approach provides a viable bio-based alternative to petrochemical coatings, paving the way for next-generation eco-friendly disposable paper products.
研究领域:
材料科学
·
环境工程
·
绿色化学
·
纳米技术
·
包装技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 6
·3717-3728
·
IF 4.9
Wang Wenxi,Han Sirui,Ren Junjie,Xiao Xiufeng,Chen Jingbo,You Ruiyun,Zhang Guifeng,Lu Yudong
A two-dimensional (2D) substrate composed of nanocellulose-gold nanostars (S-CNF/Au NSs) was prepared, which exhibited remarkable homogeneity and stability. P-aminothiophenol (PATP) was modified on the S-CNF/Au NSs substrate by Au–S bonds. The amino group of PATP was utilized to react with the aldehyde group of malondialdehyde (MDA) in a Schiff base reaction, resulting in a new Raman peak at 1655 cm −1 attributed to C = N vibration. Since the intensity of the Raman peak at 1078 cm −1 was hardly affected under acidic conditions, the ratio of the characteristic peak of C = N (1655 cm −1 ) to the peak intensity at 1078 cm −1 was used as a characterization of the MDA concentration. The precision of signal intensity was further corrected to improve confidence of the results. The developed SERS sensing system displayed satisfactory sensitivity with a linear detection range of 1 × 10 –9 ~ 2.5 × 10 –2 mM and a limit of detection (LOD) of 1.29 × 10 –11 mM. The S-CNF/Au NSs 2D substrate was able to sensitively differentiate serum from gastric cancer patients and healthy individuals by SERS analysis ( p < 0.0001), which was superior to colorimetric analysis ( p < 0.01). This result suggests that the proposed S-CNF/Au NSs 2D substrate has potential for MDA detection and can be used for early diagnosis of gastric cancer.
研究领域:
医学诊断
·
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 7
·1-14
·
IF 1.434
Yuan Ruixia,Liu Hui,Yu Peng,Wang Huaiyuan,Liu Jincheng
Traditional insulative coatings usually suffer from pitting corrosion in harsh corrosive environment. Herein, in this work, electroactive polyaniline/carboxylated carbon nanofiber (PANI/CNF) nanocomposite was prepared via in situ chemical polymerization and first incorporated into superhydrophobic coating with better barrier effect. Multilayer coatings were constructed by facial spraying using polyphenylene sulfide (PPS) and ethylene tetrafluoroethylene (ETFE) with gradient weight ratios as film-forming materials. The composite coating with 40 wt% ETFE in top layer (denoted as ETFE-40) possesses best superhydrophobicity and highest oleophobicity with water contact angle (CA) and glycerol CA of 160° and 155° as well as low water sliding angle (SA) and glycerol SA of 2.2° and 8.8°, respectively. The lotus-like nano/micro structures, low surface energy material ETFE and modification of 1H,1H,2H,2H -perfluorooctyltriethoxysilane (POTS) should contribute to the superior liquid repellency. Especially, robust mechanical strength and durable anti-wettability are obtained with high WCA of 151° and glycerol CA of 147° after 8000 cycles abrasion. The composite coating also exhibits strong adhesion and superior self-cleaning. The enhanced electrochemical corrosion resistance of the coating in 3.5 wt% NaCl solution can be attributed to the outstanding barrier function of superhydrophobic surface and the passivation effect of electroactive PANI/CNF. This novel and effective coating system would definitely benefit the development of robust protective coating and promise wider engineering application.
研究领域:
材料科学
·
纳米技术
·
表面工程
·
电化学
·
防护涂层
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 11
·6217-6233
·
IF 4.21
Jiang Shuai,Zhang Meiling,Li Mengmeng,Liu Liu,Liu Lifang,Yu Jianyong
Abstract Herein, a facile method on fabricating aerogels with hierarchical porous structures was created by freeze-drying the cellulose nanofibril (CNF)/methyltrimethoxysilan (MTMS)/fumed silica (FS) suspension. FS was introduced for its porous structure, which could improve the thermal insulation performance of freeze-dried aerogels. The as-prepared aerogels were hydrophobic with improved mechanical properties (elastic recovery rate was up to 99.7%) and reduced thermal conductivity (0.027 Wm −1 K −1 at 25 °C). Most importantly, the addition of FS was proved to improve the thermal insulation stability of cellulose aerogels efficiently in different values of relative humidity (RH) and temperatures. The thermal conductivity of pure CNF aerogel conditioned at 25 °C and 95% RH was 196% higher than that of the fully-dried one, while the increase was 56% for the composite aerogel. Besides, at 30% RH, the thermal conductivity increased by 24% for the pure CNF aerogel when tested from 20 to 60 °C while only a 2% increase for the composite aerogel. Moreover, when tert-butanol was used as the solvent to optimize the distribution of the pores of freeze-dried aerogels, their thermal insulation performance was further improved. Our work provides easily available CNF/MTMS/FS ternary aerogels, which are stable in thermal conductivity in the changing environment. Graphic abstract
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wei Zhang,Hengrui Wang,Siyi Ji,Yongqian Shi,Jiefeng Gao,Long-Cheng Tang,Pingan Song
In today's digital era, electromagnetic radiation pollution and fire hazard stand as a dual-edged sword, not only diminishing the efficacy of sophisticated electronic devices but also threatening human health. As a result, the pursuit of advanced electromagnetic shielding materials with high flame retardancy has ascended to the forefront of research priorities, underscoring their crucial role in mitigating these risks. In this study, pyrrole polymerization was employed to obtain a modified PPy-MXene, which was used to construct flame retardant modified MXene aerogel composites by the "Concreting" method. It was found that peak heat release rate, the total heat release, peak CO₂ production rate, peak smoke production rate and total smoke release of the C 1 M 2 MT FRs were reduced by 67.7 %, 46.7 %, 71.4 %, 71.7 % and 77.3 %, respectively. Furthermore, the average electromagnetic interference shielding effectiveness of C 1 M 2 MT FRs in the X-band and K-band reached 67.3 dB and 91.4 dB, respectively. It was noted that CMMT FRs had the ultra-low reflectivity (as low as 0.14). Additionally, the mechanical durability and strength of the aerogel composites were obviously enhanced, with compressive stress increased by a factor of 3.2, in comparison with that of the CNF aerogel.
研究领域:
材料科学
·
电子工程
✓ 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）