CARBOHYDRATE POLYMERS
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2010
·
IF 3.167
Xue Mao,Bin Ding,Moran Wang,Yanbing Yin
In this study, a novel nanocomposite multilayers was deposited on the electrospun nanofibrous mats by an electrostatic layer-by-layer (LBL) self-assembly technique. The positively charged water-insoluble 2,9,16,23-tetraaminophthalocyanine copper (CuTaPc) and the negatively charged water-soluble poly(acrylic acid) (PAA) were alternately deposited on the surface of negatively charged nanofibrous cellulose mats. The cationic CuTaPc was synthesized and characterized by UV–Vis and Fourier transform infrared (FT-IR) spectroscopy. The template nanofibrous cellulose mats were obtained from the alkaline hydrolysis of electrospun nanofibrous cellulose acetate mats. The resultant nanofibrous mats were characterized by scanning electron microscopy (SEM) and FT-IR spectroscopy. The SEM images showed that the composite LBL structured films were homogeneously deposited on the surface of the nanofibers . The diameters of nanofibers increased with the number of deposition bilayers . The average thickness of each CuTaPc/PAA bilayer is about 10 nm. Additionally, the FT-IR spectra results also indicated that the CuTaPc and PAA were coated on the nanofibrous cellulose mats.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 27
·期 2
·1479-1484
·
IF 1.569
Li Jing,Cao Jun,Zhang Xiufang,Wang Song,Zheng Yingying,Pan Jiaqi,Li Chaorong
The ZnO/CdS nanocomposites have been successfully synthesized on the electrospun cotton cellulose nanofibers (CCNFs). ZnO nanorods (70–80 nm in diameter and 1 μm in length) are uniformly grown on the CCNFs by a simple hydrothermal method firstly and then different amount of CdS nanoparticles (20–30 nm in diameter) are loaded on the ZnO nanorods by the chemical bath deposition method. The visible light photocatalytic activity of ZnO/CdS nanocomposites is investigated by degradation of Rhodamine B under visible light irradiation, and it demonstrates that the photocatalytic performance of this composites is significantly enhanced compared with that of pure ZnO. Furthermore, the relatively narrow band gap and novel nanostructure of the composites are considered as the main reasons of this enhancement.
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
INTEGRATED FERROELECTRICS
·
2016
·
IF 0.375
Zhang-Yunhua,Liu-Chuanting,Lv-Yanyan,Zhou-Zhenwen,Wang-Feijun,Shao-Ziqiang,Zuo-Yingying,Wei-Xiaolin
Cellulose nanofibers (CNFs) with high aspect ratio was prepared from wood cellulose using 2,2,6,6-tetramethylpiperidine oxygen radical (TEMPO) oxidation method. By UV, TEM, FT-IR, XRD and TG, the characterizations of CNFs were studied. The results showed that CNFs was a a hydrophilic natural nanomaterials with good suspension stability, high aspect ratio and cellulose I crystal structure. The modified double base propellant with high solid content prepared by calendering process was modified by using CNFs as nano-fillers. The results of tensile test and burning test of propellant showed that the mechanical properties and combustion performances of CNFs modified double base propellant had been improved significantly compared to conventional modified double base propellant. The tensile strength and elongation at break can be increased by nearly 34%, 45%,respectively. The burning rate of propellant can be increased by 27.5% while the pressure coefficient decreased by 20%.
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
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Jinqiang Sun,Mengge Shang,Minna Zhang,Shimo Yu,Zhipeng Yuan,Xibin Yi,Serguei Filatov,Jing Zhang
Biomass aerogels are attractive in various applications owing to their inherent advantages of renewability, biodegradability and eco-friendly. Herein, a novel composite aerogel of konjac glucomannan (KGM)/TEMPO-oxidized cellulose nanofibers (TOCNF)@HKUST-1 (KTA@HKUST-1) is prepared through a facile vacuum impregnation method combined with the directional freeze-drying process, which using KGM and TOCNF as raw materials. The structural analyses disclose that the KTA@HKUST-1 has a hierarchical porosity, in which HKUST-1 can provide micropores for adsorption, while the meso -/macropores from KTA act as high-speed channels to improve diffusion and mass transfer rate to transport CO 2 components into the micropores of HKUST-1. The experiment results of KTA@HKUST-1-10 (KTA@H10) show that the CO 2 adsorption capacity can reach 3.50 mmol·g −1 at 1 bar and 298 K, and the adsorption capacity retention rate as high as 91.43% after 7 cycles. In addition, the CO 2 /N 2 adsorption selectivity of KTA@H10 can reach 18.42, which has an excellent potential for selective CO 2 adsorption.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Changling Wu,David Julian McClements,Bohui Ma,Zhiquan Lai,Fenghua Wu,Xingquan Liu,Peng Wang
Currently, there is great interest in converting edible agro-waste, such as okara from soybean production, into value-added products. For this study, we focus on fabricating composite hydrogels from okara cellulose nanofibers (CNFs) and carrageenan (CA). We also examined the effects of TEMPO oxidation of the okara CNFs, as well as CA concentration, on the microstructure and physicochemical properties of the composite hydrogels. The water holding capacity, oil holding capacity, surface tension, gel strength , and viscoelasticity of the composite microgels increased with increasing CA concentration, and it was found that the highest values were obtained for TC-CA2 hydrogel: contact angle = 43.6° and surface tension = 45.12 mN/m, which was attributed to the formation of a more regular and dense three-dimensional gel network. All the CNF-CA microgels had highly anionic ζ-potential values (−38.8 to −50.1 mV), with the magnitude of the negative charge increasing with TEMPO oxidation and carrageenan concentration. These results suggest there would be strong electrostatic repulsion between the composite hydrogels. The composite microgels produced in our work may be useful functional materials for utilization within the food industry, thereby converting a waste product into a valuable commodity.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuntao Liang,Xiaolong Cai,Yan Liu,Zhenglong He,Yong Sun,Shuanglin Song
Ion-conductive hydrogels have emerged as the promising candidate materials for flexible sensors due to their high ion migration efficiency and rapid responsiveness. However, achieving synergistic optimization of the mechanical, electrical and sensing properties of ion-conductive hydrogels remains a challenge. This study synthesized a dual-network ion-conductive hydrogel (PCN) via an in-situ thermal radical polymerization method. This hydrogel is formed through multiple cross-linking mechanisms involving covalent bonds, ionic bonds and hydrogen bonds. The optimal hydrogel (PCN-30) exhibits outstanding mechanical properties across a broad strain and temperature range (938 % tensile strain, 0.23 MPa tensile strength) and sensing performance (its relative resistance change exhibits good linearity with both tensile strain and temperature variation. For tensile strains of 10–300 %, the average gauge factor ( GF ¯ ) reaches 1.71. During temperature rise (15–45 °C) and drop (−35–15 °C) processes, GF ¯ are 2.46 and 1.63, respectively). Additionally, PCN-30 as a sensor enables rapid and precise motion and vital sign sensing as well as information transmission. This work highlights that the hydrogel combines the environmental adaptability over a wide temperature range and the sensitive response capability within a wide strain range, greatly promoting its practical application in the field of human-computer interaction.
研究领域:
材料科学
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柔性电子学
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传感器与执行器
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高分子化学
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人机交互
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jie Wei,Shuai Jia,Jie Wei,Chao Ma,Ziqiang Shao
Although humidity-responsive actuators serve as a promising candidate in smart wearables, artificial muscles, and biomimetic devices, most of them derived from synthetic polymers could not simultaneously achieve multifunctional properties. In this work, a cellulose nanofiber (CNF)-based film actuator with high mechanical properties, excellent Joule heating, and antibacterial capability is successfully constructed by integrating with Ti3C2Tx (MXene) and tannic acid (TA) via a vacuum-assisted filtration approach. Owing to the unique nacrelike structure and strong hydrogen bonds, the tensile strength and toughness of the composite film could reach 275.4 MPa and 10.2 MJ·m–3, respectively. Importantly, the hydrophilic nature of CNFs and alterable interlayer spacing of MXene nanosheets endow the composite film with sensitive humidity response and extraordinary stability (1000 cycles). With the assistance of MXene nanosheets and TA, the composite film could not only present outstanding Joule heating but also possess remarkable antibacterial properties against both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus. Benefiting from the above merits, the proof-of-concept smart garment is assembled by the as-prepared film and is capable of regulating humidity and temperature.
研究领域:
材料科学
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生物医学工程
·
智能穿戴设备
✓ 已验证
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Xiaohe Li,Yongzhuang Liu,Yanyan Yu,Wenshuai Chen,Yixing Liu,Haipeng Yu
Given its health benefits to the human body, quercetin (QT) offers promising applications in the healthcare food and pharmaceutical industries. However, the instability, low water solubility and low bioavailability of QT remain to be solved. In this paper, cellulose nanofiber (CNF) was used as an effective nanoscale carrier to alleviate these problems. By adjusting the solvent composition ratio and processing method, QT was optimally immobilized on CNF surfaces and was eventually encapsulated in the CNF matrices, forming a CNF/QT nanoformulation. A high loading capacity of 78.91% and encapsulation efficiency of 88.77% were achieved simultaneously. The nanoformulation exhibited better dietary performance and antioxidant activity than raw QT. Moreover, sustained release of QT was demonstrated in vitro. These results reveal that CNF is an ideal natural nanoscale dietary carrier and offers high encapsulation efficiency for healthcare supplementation. This work also provides a promising nanoformulation candidate for managing sustained antioxidant requirements.
研究领域:
食品科学
·
药学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xuran Xu,Luyu Yang,Xuebao Xiong,Yanan Zhang,Junhong Liu,Yubing Hu
The rapid development of moisture-responsive actuators has attracted considerable research attention in fields such as flexible electronics and soft robotics. However, the fabrication of robust cellulose-based actuators with superior mechanical strength and excellent moisture responsiveness remains a significant challenge. Herein, inspired by the adhesive properties of mussels, we developed a homogeneous moisture-responsive actuator (BCNF/PDA) by integrating bacterial cellulose nanofibers (BCNF) with polydopamine (PDA). The catechol and amino groups in PDA form strong interactions with BCNF through multiple covalent and noncovalent bonds, endowing the resulting actuator with high tensile strength (336 MPa), a high Young’s modulus (7.12 GPa), excellent toughness (12.4 MJ m–3), and rapid hygroscopic actuation performance. Owing to the fast moisture adsorption/desorption capabilities of BCNF and PDA, an effective moisture gradient is established within the actuator, enabling stable and rapid hygroscopic deformation. Consequently, the actuator exhibits a fast response, large deformation (133°), and high actuation force output (9.3 N m–2). Furthermore, its feasibility as a mechanical arm, smart switch and smart curtain for moisture control was demonstrated in a prototype device, highlighting the great potential of this type of actuator for practical applications.
研究领域:
材料科学
·
纳米技术
·
软体机器人
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柔性电子器件
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 3.9
Lihao Shi,Wenjun Yu,Enfu Wang,Weisheng Han,Yu Miao,Yipeng Liang,Yifan Chen,Wenbiao Zhang,Ran Zhang,Jingda Huang
In this work, we used cellulose nanofibers (CNF) as the skeleton, Fe 3 O 4 @ZnO composite particles as magnetic synergist particles, 3-(2-aminoethylamino) propyltrimethoxysilane (AS) and trimethoxy(octyl)silane (OTMS) as water-based hydrophobic modifiers to prepare magnetic and superhydrophobic cellulose nanofibers based-aerogel with low density and intricate three-dimensional structure. Fe 3 O 4 @ZnO confers magnetic properties (3.82 emu/g) and exceptional thermal stability (water contact angle of 150.1° at 200 °C) to the system, while the combination with OTMS/AS endows the system superhydrophobic (157.5°) and excellent mechanical properties (stress of 96.95 kPa at 80% strain). It is worth noting that in the process of modifying the system with OTMS/AS, no organic solvents and acidic substances are used in the solution. Benefiting from their synergies, the system demonstrates a notable oil absorption capacity (12.31–41.91 g/g) and outstanding oil selectivity (exceeding 90%), driven by gravity alone. Interestingly, this system, marked by its cost-effectiveness, simplicity, eco-friendliness, and heightened efficiency, holds promising prospects for diverse applications in different oil–water separation behavior and purifying industrial oil wastewater, as well as oil flooding incidents. Graphical
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
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Fang Tian,Shuyi Xu,Miaoyu Gan,Baihui Chen,Qian Luan,Luyun Cai
Fucoxanthin (FX) has various excellent biological properties but suffers from poor bioavailability. In this work, we build a bionic cell wall model using TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-oxidized cellulose. The bionic cell wall enhances the environmental stability of the liposomes and serves as a pH-responsive mechanism. The coating processes protect the structure of liposomes and fucoxanthin under the acidic conditions of the stomach. The bionic cell wall disperses and releases the fucoxanthin in simulated intestinal fluid (SIF). Overall, the protective and release capabilities highlight the potential of cellulose in a bionic cell wall model and provide diversity for the structural design of carriers for delivering functional bioactive components.
研究领域:
材料科学
·
药学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Chuanyin Xiong,Congmin Zheng,Zhao Zhang,Qing Xiong,Qiusheng Zhou,Dongping Li,Mengxia Shen,Yonghao Ni
Recently, multifunctional materials have received widespread attention from researchers. Cellulose nanofibers (CNF) is one of biomass materials with abundant hydroxyl groups, which shows great potential in manufacturing multifunctional composite material. In this paper, a kind of polyaniline@CNF/polyvinyl alcohol-H 2 SO 4 multifunctional composite material (PANI@CNF/PVA-H 2 SO 4 ) was successfully designed by in-situ chemical polymerization of conductive polyaniline (PANI) onto CNF aerogel with high aspect ratio, and then coated with PVA-H 2 SO 4 gel. The composite material has a specific capacitance of 502.2 F/g at a scan rate of 5 mV/s as supercapacitor electrode. Furthermore, when the composite was assembled into a symmetrical supercapacitor, it can still provide an energy density of 11.49 W h/kg at a high power density of 413.55 W/kg. Besides, the as-obtained PANI@CNF/PVA-H 2 SO 4 composite has an excellent electromagnetic shielding performance of 34.75 dB in X-band. In addition, due to the excellent flexibility of CNF and PVA, the PANI@CNF/PVA-H 2 SO 4 composites can be further applied to stress sensors to detect pressure and human motion signals.
研究领域:
材料科学
·
能源技术
·
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）