CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Xinwang Cao,Xianfeng Wang,Bin Ding,Jianyong Yu,Gang Sun
Cellulose nanowhiskers as a kind of renewable and biocompatible nanomaterials evoke much interest because of its versatility in various applications. Herein, for the first time, a novel controllable fabrication of spider-web-like nanoporous networks based on jute cellulose nanowhiskers (JCNs) deposited on the electrospun (ES) nanofibrous membrane by simple directly immersion-drying method is reported. Jute cellulose nanowhiskers were extracted from jute fibers with a high yield (over 80%) via a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)/NaBr/NaClO system selective oxidization combined with mechanical homogenization. The morphology of JCNs nanoporous networks/ES nanofibrous membrane architecture, including coverage rate, pore-width and layer-by-layer packing structure of the nanoporous networks, can be finely controlled by regulating the JCNs dispersions properties and drying conditions. The versatile nanoporous network composites based on jute cellulose nanowhiskers with ultrathin diameters (3–10 nm) and nanofibrous membrane supports with diameters of 100–300 nm, would be particularly useful for filter applications.
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高影响因子
CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Chao Zhong,Chunming Wang,Fan Huang,Honghua Jia,Ping Wei
In this article, a novel and high efficient solvent, tetra - n -Butylammonium Hydroxide (TBAH), was used for dissolution and isolation of straw cellulose from wheat straw. The composition analysis with gas chromatography (GC) and the spectroscopic characterization analysis conducted by X-Ray diffraction (XRD)/Fourier transform infrared spectroscopy (FTIR) indicated that straw cellulose can be directly dissolved and isolated by TBAH without derivatization . The investigation on the properties of straw cellulose isolation was based on the results of single factor experiments and orthogonal experiments, with optimum conditions for straw cellulose isolation being obtained as follow: reaction temperature 60 °C, reaction time 40 min, concentration of TBAH 50% and ratio of TBAH to straw 10:1 (m/m). In addition, as a solvent for cellulose, TBAH could be recycled several times with high activity being retained.
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PubMed
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Yifeng Wang,Ting Wang,Chunyu Ji,Bin Tang,Xiaohan Sun,Zhihua Sun,Qian Ding,Siying Liu,Han Yang
Passive radiative cooling is a promising technology for mitigating global warming by reflecting sunlight and radiating heat into the supercooled outer space. This approach has attracted increasing attention. However, achieving efficient light scattering typically depends on high-refractive-index inorganic materials, such as titanium dioxide. Despite its widespread application, recent research reveals that titanium dioxide may pose a potential carcinogenic risk. As a sustainable alternative, cellulose offers renewability, biodegradability, and biocompatibility. Inspired by the scale structure of the Calothyrza margaritifera beetles, all-cellulose-based highly scattering films are developed to overcome the intrinsic low refractive index of cellulose. These films consist of ethyl cellulose microspheres with optimized size and filling fraction as scattering centers and cellulose nanofibers as a supporting network to anchor these microspheres. Despite their ultrathin thickness (10 µm), these films achieved a reflectivity of 70%. When applied for passive radiative cooling, 300-µm-thick all-cellulose-based films reduced temperature by 8 °C during the day and 2 °C at night. The use of cellulose to achieve thinner, more efficient scattering materials while minimizing material usage, offering a sustainable and safer alternative to titanium dioxide as a scattering material. Such all-cellulose-based highly scattering films hold great promise for the fields of functional coatings, foods, and personal care products.
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BIOMACROMOLECULES
·
2025
·
IF 5.4
Yinsong Li,Zhuozheng Yu,Yang Wang,Shuhan Xu,Xiangrui Zheng,Yao Zhang
Cellulose-based materials have been widely studied due to their biodegradability and excellent mechanical strength. However, the intrinsic brittleness of cellulose limits its applications. In this study, the bacterial cellulose-chitosan films were prepared by a casting method. The cellulose films with ≤ 30% chitosan exhibited a simultaneous increase in strength and toughness. The slippage of cellulose chains and dense network structure contribute to the improved strength and toughness of the cellulose-chitosan films. Besides, coarse-grained molecular dynamics simulations were performed to investigate the effects of different molecular factors (i.e., chain length, molecular interaction strength, and density) on the mechanical properties of cellulose-chitosan films. These molecular factors exhibited opposite effects on the tensile strength and strain at break. In particular, modifying the density of cellulose-chitosan films could simultaneously improve the strength and toughness significantly without sacrificing the elastic modulus. The findings provide physical insights into the strengthening and toughening effects of the cellulose-chitosan films.
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PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 22
·1745
·
IF 4.3
Jiangwei Li,Qian Guan,Hualiang Wei,Mengju Zhang,Suxia Ren,Lili Dong,Zaifeng Li,Shuhua Yang,Xiuqiang Zhang
As a fundamental component of sodium-ion batteries, separators are considered to isolate two electrodes and simultaneously allow for the transport of ions. Cellulose separators have attracted widespread interest for their remarkable properties. In this study, we prepared composite separators comprising cellulose nanofibers (CNFs) and halloysite nanotubes (HNTs) for sodium-ion batteries. When the content of the HNT was up to 60%, the tensile strength and elongation at break of the composite separator (denoted as C/H-60) were 24.39 MPa and 2.22%, respectively. Importantly, the C/H-60 separator demonstrated a high porosity (69.08%), improved ionic conductivity (1.142 mS/cm), decent thermal stability, and good electrolyte retention (91.3% electrolyte uptake). The assembled sodium-ion battery containing the composite separators had an excellent rate capacity and cycling property. The proposed composite separators are expected to be applied in high-performance sodium-ion batteries.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Huili Peng,Hao Wang,Jianning Wu,Guihua Meng,Yixi Wang,Yulin Shi,Zhiyong Liu,Xuhong Guo
It is still a challenging global task for oil/water separation. Here we fabricate superhydrophobic magnetic cellulose sponge (SMCE) that can be used to separate free oil/water mixtures and surfactant-stabilized W/O emulsions. The simple modification includes only two steps: a thin layer of ferroferric oxide (Fe3O4) was coated on cellulose sponge surface via codeposition method, and subsequently magnetic cellulose sponge was modified with hexadecyltrimethoxysilane, which could react with Fe3O4 or hydroxyl groups of cellulose. The purpose of coating Fe3O4 is to increase the roughness of the surface and recycle the sample by magnetic force. SMCE could separate oil–water mixtures with a high separation efficiency and good reusability. The sample is green, low cost, and environmental friendly, which makes it a promising candidate to be used in oil–water separation.
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高影响因子
Journal of Renewable Materials
·
2019
·Vol. 7
·期 12
·1363-1380
·
IF 1.427
Wang Xu,Zhou Jianhong,Pang Bo,Zhao Dawei
Introduction of the strategy of anhydrous calcium carbonate protection incorporated with the drop by drop reaction, high-purity 1-butyl-3-methylimidazolium chloride ([Bmim] Cl) was prepared at reaction temperature of 80°C for only 10 h. Cellulose samples from different biomass sources
(with different degree of polymerization characteristic) could be rapidly (no more than 10 minutes) and completely dissolved in the [Bmim] Cl using a microwave-assisted ionothermal route. Homogeneous cellulosic regenerates with high degree of polymerization and thermal stability characteristics
were obtained through a coagulation process in water. Furthermore, the dissolved celluloses were readily regenerated into solid products such as casting films and spinning fibers, which exhibited high transparency and flexibility, as well as superior mechanical properties of over 300 MPa (tensile
strength) more than those of cellulose samples reported. This study therefore provides a new process for the synthesis of high-purity [Bmim] Cl for the highly efficient dissolution of cellulose to produce high performance cellulosic materials for various applications such as flexible electronic,
optoelectronic, soft robots.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2017
·Vol. 26
·期 4
·1625-1634
·
IF 1.877
Huang Biaobiao,Tang Yanjun,Pei Qinqin,Zhang Kaijie,Liu Dongdong,Zhang Xueming
Hemicellulose-based composites have become promising candidates for eco-friendly packaging applications because of their biodegradability and cost-effectiveness. However, the inherently poor mechanical properties of hemicellulose-based composites largely hinder their potential for targeted application. Fortunately, nanocrystalline cellulose (NCC), an eye-catching nanomaterial, may offer opportunities for addressing the above issue due to its outstanding mechanical properties and environmental friendliness. Herein, a comparative study was conducted on the effect of unmodified and cationically modified nanocrystalline cellulose (CNCC) on the overall properties of the as-prepared hemicelluloses (HC)/sorbitol (SB) films. Scanning electron microscopy (SEM) image shows that the addition of CNCC imparted a relatively smooth surface to the obtained HC/SB films in comparison to NCC. Furthermore, CNCC reinforced HC/SB films exhibited improved thermal stability as compared to that with NCC. From rheological behavior evaluation, the presence of NCC, particularly CNCC, had an important effect on thickening HC/SB suspensions. The tensile stress of the composite films with 9% NCC and 9% CNCC was 9.18 and 10.44 MPa, respectively, which was increased by 14 and 30% in comparison to that of pure HC/SB film (8.05 MPa). The marked increase in elastic modulus as a function of the added NCC or CNCC was also identified. This result strongly supports the conclusion that the addition of NCC or CNCC was effective in improving the mechanical properties of HC/SB films.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xiaoyu Wang,Yanjun Tang,Xianmei Zhu,Yiming Zhou,Xinghua Hong
Polylactic acid (PLA) serves as an ideal matrix for preparing electrically conductive materials for electrode, electromagnetic shielding and functional biological material application. Here, an environmentally friendly PLA/polyaniline (PANI)/nanocrystalline cellulose (NCC) nanocomposite film was prepared. Effects of NCC loadings on the rheological behavior of PLA/PANI/NCC suspensions and the microscopic, thermal, mechanical and conductive properties of nanocomposite films were investigated. Results revealed that PLA was wrapped with PANI particles and NCC was uniformly distributed in the obtained nanocomposite films. The PLA/PANI/NCC films exhibited an electrical conductivity of up to 2.16 S∙m −1 with 1% NCC dosage. Besides, the viscosity and viscoelasticity of the PLA/PANI/NCC suspensions were decreased and the dispersion stability of the suspensions was improved with the incorporation of NCC. Furthermore, the mechanical strength of PLA/PANI/NCC nanocomposite films was significantly improved with the reinforcement effect of NCC. In presence of 4% NCC loading, the tensile strength (TS) and tensile modulus (TM) of PLA/PANI/NCC films had an increase of 38.1% and 89.1%, respectively, while the elongation at break (Eb) exhibited a decrease of 27.3%, as compared to that of PLA/PANI films. These results demonstrated that the as-prepared PLA/PANI/NCC nanocomposite film may have the potential to be used as a bio-based electrically conductive material.
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高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2016
·
IF 3.42
Ningxiao Yuan,Lu Xu,Lu Zhang,Haowen Ye,Jianhao Zhao,Zhong Liu,Jianhua Rong
Hybrid polyacrylamide/bacterial cellulose nanofiber clusters (PAM/BC) hydrogels with high strength, toughness and recoverability were synthesized by in situ polymerization of acrylamide monomer in BC nanofiber clusters suspension. The hybrid gels exhibited an extremely large elongation at break of 2200%, and a high fracture stress of 1.35 MPa. Additionally, the original length of hydrogels could be recovered after releasing the tensile force. Compressive results showed that the PAM/BC hybrid gels could reach a strain of about 99% without break, and was able to completely recover its original shape immediately after releasing the compression force. The compressive stress at 99% reached as high as 30 MPa. Nearly no hysteresis in cyclic compressive tests was observed with these hybrid gels. The FT-IR, XRD and TGA analysis showed that hydrogen bonds between the PAM chains and BC nanofiber clusters mainly contributed to the superior mechanical properties of hybrid hydrogels. The cell viability results suggested that PAM/BC hybrid hydrogel was benign for biomedical application. These PAM/BC hydrogels offer a great promise as biomaterials such as bone and cartilage repair materials.
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Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 18
·6402-6411
·
IF 0
Liangbo Yu,Jinyou Lin,Feng Tian,Xiuhong Li,Fenggang Bian,Jie Wang
Cellulose nanofibrils (CNF), as a kind of renewable, sustainable and biodegradable natural-based nanomaterial, have shown great potential application in numerous fields due to their fascinating properties. Some properties of CNF-based materials are closely related to their cellulose polymorph and crystallinity index. In this work, we present a facile method for the generation of CNF with tunable polymorphs and crystallinity via the alkali treatment of jute fibers under various conditions followed by (TEMPO)-mediated oxidation and mechanical disintegration. The changes of the cellulose polymorphs and crystallinity induced by alkali treatment on the jute fibers and consequently obtained CNF were well investigated by synchrotron radiation wide-angle X-ray scattering (SR-WAXS), Fourier transform infrared spectra (FTIR) and differential scanning calorimetry (DSC), respectively. Moreover, the morphology of the as-prepared CNF was also examined by transmission electron microscopy (TEM). It has been found that the CNF showed an identical cellulose polymorph to their source material, but a much higher crystallinity index, which revealed the feasibility of CNF generated from jute fibers with tunable polymorphs and crystallinity indexes.
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DOI
CELLULOSE
·
2019
·Vol. 26
·期 13
·7717-7725
·
IF 3.917
Tao Peng,Wu Zhengmei,Xing Chuyue,Zhang Qi,Wei Zuyun,Nie Shuangxi
In this work, bagasse pulp was used to prepare cellulose nanofibrils (CNFs) by enzymatic assisted mechanical treatment. A xylanase pretreatment was applied for varying the hemicellulose content in the pulp fibers, and the contribution of this pretreatment to the post-mechanical treatment was investigated. The results showed that CNFs prepared after xylanase pretreatment exhibited enhanced thermal stability with an increase in crystallinity. However, the overall thermal stability of the CNFs decreased significantly after xylanase was applied directly to the mechanical treated CNFs. The results indicate that the presence of hemicellulose in the fiber could affect the thermal stability of CNFs. The direct application of xylanase to CNFs could affect both the hydrogen bond between the hemicellulose and the cellulose and the covalent bond between the hemicellulose molecules, which partially destroys the internal network structure and reduces of thermal stability of CNFs. Graphic abstract
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高影响因子
危险品化学品经营许可证（带存储）