ACS Applied Materials & Interfaces
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2019
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IF 8.456
Duan-Chao Wang,Hou-Yong Yu,Dongming Qi,Mohankandhasamy Ramasamy,Juming Yao,Feng Tang,Kam (Michael) Chiu Tam,Qingqing Ni
Nature employs supramolecular self-assembly to organize many molecularly complex structures. Based on this, we now report for the first time the supramolecular self-assembly of 3D lightweight nanocellulose aerogels using carboxylated ginger cellulose nanofibers and polyaniline (PANI) in a green aqueous medium. A possible supramolecular self-assembly of the 3D conductive supramolecular aerogel (SA) was provided, which also possessed mechanical flexibility, shape recovery capabilities, and a porous networked microstructure to support the conductive PANI chains. The lightweight conductive SA with hierarchically porous 3D structures (porosity of 96.90%) exhibited a high conductivity of 0.372 mS/cm and a larger area-normalized capacitance (Cs) of 59.26 mF/cm2, which is 20 times higher than other 3D chemically cross-linked nanocellulose aerogels, fast charge–discharge performance, and excellent capacitance retention. Combining the flexible SA solid electrolyte with low-cost nonwoven polypropylene and PVA/H2SO4 yielded a high normalized capacitance (Cm) of 291.01 F/g without the use of adhesive that was typically required for flexible energy storage devices. Furthermore, the supramolecular conductive aerogel could be used as a universal sensitive sensor for toxic gas, field sobriety tests, and health monitoring devices by utilizing the electrode material in lightweight supercapacitor and wearable flexible devices.
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ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Le Li,Han Tao,Bolang Wu,Ge Zhu,Ke Li,Ning Lin
Different from the conventional surface modification strategy, the end reaction based on the active aldehyde groups of cellulose nanocrystal (CNC) provides a targeted modification under the protection of its surface chemistry. With the purpose of promoting its redispersibility in water, the strategy of triazole end-grafting performed on CNC was proposed in this study, exhibiting the significant improvement on the redispersion and stability of nanocrystals in the aqueous suspension attributed to synergistic effect of steric stabilization and electrostatic repulsion. The end-modified CNC was then introduced into a natural rubber (NR) matrix to fabricate the composites with reactive compatibility from a thiol–ene click reaction. Ascribed to the formation of covalent linkage between nanofillers and matrix together with the architecture of the rigid percolating network, the mechanical properties of obtained composites were remarkably advanced. With the introduction of 10 wt % end-modified CNC, the tensile strength, Young’s modulus, and storage modulus of the prepared composite increased by 160, 468, and 1041% in contrast with those of the neat NR material. More importantly, this composite retained a high level of elongation at the break (1575%) similar to that of the raw rubber material attributed to the designed covalent linkage and resultant reactive enhancement of end-modified CNCs to the NR matrix.
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JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Han Zhao,Xiao-Kun Ouyang,Li-Ye Yang
Herein we report a new type of adsorbent for the efficient removal of Pb(II), which is prepared from cellulose nanofiber (CNF) and sodium alginate (SA) via a simple cross-linking method. During this process, the porous structure of the hydrogel beads was formed by the disintegration of calcium phosphate . The performance and structure of the prepared beads were systematically examined by X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, zeta potential measurements, and scanning electron microscopy. Investigations revealed that the adsorption equilibrium was attained after approximately 120 min. In addition, 82% of Pb(II) ions were absorbed in the initial 40 min at 297 K. The adsorption process was consistent with a pseudo-second order kinetic model and the Langmuir adsorption isotherm model, and the limit adsorption capacity reached 318.47 mg g −1 . Acid treatment and regeneration experiments verified that the adsorption capacity of Pb(II) on the beads was satisfactory, and the adsorption rate remained at >80% after 5 cycles. These results indicate that the prepared beads are potential adsorbents for water treatment.
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Materials Science & Engineering C-Materials for Biological Applications
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2019
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IF 4.959
Wei Yang,Yuanyuan Zheng,Jie Chen,Qiyu Zhu,Longbao Feng,Yong Lan,Ping Zhu,Shuo Tang,Rui Guo
The regeneration of cartilage is a challenging problem for lack of innate abilities to mount a sufficient healing response. Kartogenin (KGN), an emerging chondroinductive non-protein small molecule, bound to the surface of the ultrasmall super-paramagnetic iron-oxide (USPIO) by innovational one-step technology, followed by being incorporated into the cross-linking collagen/cellulose nanocrystals (Col/CNC) bioactive scaffolds to stimulate an appropriate microenvironment for the growth and differentiation of bone marrow-derived mesenchymal stem cells (BMSCs), thus facilitating the formation of chondrocyte. Herein, USPIO not only served as a carrier for small molecule drugs, but also as MRI contrast agents, which can non-invasively monitor the degradation of the scaffolds and the self-repair capacity of cartilage. In vitro studies showed that the KGN could release from the composite scaffolds in a sustained and stable manner and promote the chondrogenic differentiation of BMSCs based on UV spectrophotometry test, and specific markers analysis. Of note, USPIO labeled composite scaffolds retained their stability without loss of relaxation rate the composite scaffolds can be a promising biomaterials for cartilage repair, with the function of noninvasive visualization and semiquantitative analysis of scaffolds degradation and neocartilage.
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ULTRASONICS SONOCHEMISTRY
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2019
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IF 7.279
Huiming Gu,Xin Gao,Heng Zhang,Keli Chen,Lincai Peng
In this study, parenchyma cellulose, which was extracted from maize stalk pith as an abundant source of agricultural residues, was applied for preparing cellulose nanoparticles (CNPs) via an ultrasound-assisted etherification and a subsequent sonication process. The ultrasonic-assisted treatment greatly improved the modification of the pith cellulose with glycidyltrimethylammonium chloride, leading to a partial increase in the dissolubility of the as-obtained product and thus disintegration of sheet-like cellulose into nanoparticles. While the formation of CNPs by ultrasonication was largely dependent on the cellulose consistency in the cationic-modified system. Under the condition of 25% cellulose consistency, the longer sono-treated duration yielded a more stable and dispersible suspension of CNP due to its higher zeta potential. Degree of substitution and FT-IR analyses indicated that quaternary ammonium salts were grafted onto hydroxyl groups of cellulose chain. SEM and TEM images exhibited the CNP to have spherical morphology with an average dimeter from 15 to 55 nm. XRD investigation revealed that CNPs consisted mainly of a crystalline cellulose Ι structure, and they had a lower crystallinity than the starting cellulose. Moreover, thermogravimetric results illustrated the thermal resistance of the CNPs was lower than the pith cellulose. The optimal CNP with highly cationic charges, good stability and acceptable thermostability might be considered as one of the alternatively renewable reinforcement additives for nanocomposite production.
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ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Chen Xu,Rui Feng,Fei Song,Xiu-Li Wang,Yu-Zhong Wang
Water collection from moisture and fog has been of particular interest to arid areas. To mimic the water-collecting capacity of Namib desert beetles, herein, we exploit a facile and low-cost approach to develop a superhydrophilic/superhydrophobic hybrid cellulose film, on which TiO2 nanoparticles (NPs) act as the hydrophilic region to catch water while Ag NPs coated with thiol behave as the hydrophobic area to induce the rolling of water droplets. The water collection performance can be easily modulated by controlling the two regions, and the collecting efficiency is achieved at as high as 1043 mg cm–2 h–1. Additionally, the film shows good antibacterial behavior, which can improve the water safety. The results indicate that the strategy reported in this work to prepare hybrid surfaces can bring more benefits for constructing highly safe water-collecting devices.
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CARBOHYDRATE POLYMERS
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2018
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IF 5.158
Xuexia Zhang,Minghui Liu,Hankun Wang,Ning Yan,Zhiyong Cai,Yan Yu
Cellulose aerogels have shown outstanding potential as renewable functional materials; however, their practical applications are still limited by inherent hydrophilicity and weak mechanical properties. To overcome hydrophilicity and fragility issues of aerogels, in this study, silylated bamboo-derived cellulose nanofibrils (CNF) aerogels with aligned porous structures were achieved by directionally freeze-casting a mixture of CNF suspension and methyltrimethoxysilane sol. The silylated CNF aerogels exhibited distinct aligned lamellar structures and significantly anisotropic mechanical properties. They had improved strength and stiffness in the axial direction (along the freezing direction) and excellent rapid shape recovery ability in the radial direction (perpendicular to the freezing direction) with a significant high shape recovery ratio of 92% after 100 cycles at 80% compression. Owing to their ultra-low density, hydrophobicity, and high compressive recoverability, the silylated CNF aerogels can be potentially used in a wide range of industrial applications, such as hydrophobic polymer nanocomposites, absorbents, and biomedical scaffolds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Guifa Xiao,Ying Wang,Hui Zhang,Zhaodong Zhu,Shiyu Fu
Electro-conductive hydrogel (ECH) with self-healing, shape memory and biocompatible properties is highly urgent for wearable strain sensors to prolonging their lifespan, endowing programmable shape control property, and improving affinity to skin during service. However, most of synthetic polymer-based ECH usually involve potential toxicity, long healing and shape drive time. Herein, a fast healable and shape memory ECH with excellent biocompatibility is reported for the first time by incorporating cellulose nanocrystals grafted phenylboronic acid (CNCs-ABA) and multiwalled carbon nanotubes (MWCNTs) into polyvinyl alcohol (PVA). CNCs-ABA is designed as dispersant and crosslinker in hydrogel. pH-induced dynamic borate bonds give hydrogel excellent shape recovery and fixity ratio of 82.1% and 78.2%, respectively. Meanwhile, 97.1% healing efficiency is obtained within 2 min depending on remarkable photothermal effect of MWCNTs and reversible microcrystallization. Double crosslinking networks endow excellent mechanical properties to hydrogel, whose tensile strength , strain and elastic modulus reach 227.0 kPa, 395.0% and 9.0 kPa, respectively. Furthermore, the synergistic effect of MWCNTs and NaOH enhance the conductivity of hydrogel with value of 3.8×10 −2 S/m. In addition, the hydrogel can act as strain sensor for detecting human motion with superior biocompatibility and fast resistance response to applied strain, which is suitable for human health management.
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CARBOHYDRATE POLYMERS
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2018
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IF 5.158
Wei Li,Li Zhang,Qi Li,Shenggao Wang,Xiaogang Luo,Hongbing Deng,Shilin Liu
In order to develop a biosensor based on porous structured cellulose microspheres for glucose detection with “signal-and-color” output, in this work, active group carboxyl was introduced to cellulose matrix by using plasma technology, and then glucose oxidase (GOx) was chemically immobilized through EDC-NHS cross-linking reaction. The cellulose microgels containing 21.28 mg/g of enzymes exhibited a fast response to 0.003 M glucose within only 4 min. As for detecting subject with a lower concentration of glucose, the probe still worked. When the concentration of glucose solution was 0.005 M, it took only 2 min that the reaction mixture changed from colorless to yellow. By the introduction of starch, the reaction mixture presented as amaranth color. Besides, the porous-structured substrate and the facile plasma technology were also promising for constructing enzyme-driven catalytic systems with enhanced performance.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Shuyang Gan,Tianran Zheng,Jiayu Miao,Yunhua Bai,Xiong-Fei Zhang,Jianfeng Yao
Escalating environmental concerns over plastic packaging have prompted extensive researches into renewable bio-based alternatives. In this study, bacterial cellulose (BC) films modified with natural Sapindus saponin (SS) and gelatin were developed as multifunctional active packaging materials for fruit preservation. SS and gelatin gave the composite a denser and more stable structure via the formation of covalent crosslinking, thereby strengthening the mechanical properties of the bio-based films (BFs). The tensile stress of the designed film (BF3) was 28.21 MPa, which was 89.93% greater than that of the BC film. Compared with the control, the BFs had better thermal stability and greater barrier properties, coupled with good natural affinity. Additionally, owing to the presence of SS, the BF3 showed remarkable ultraviolet-blocking capacity (92.24% UVA and 99.71% UVB shielding rates), antioxidant activity (68.47% DPPH and 74.38% ABTS scavenging activities), and anti-bacterial property ( Escherichia coli , 6.4 mm; Staphylococcus aureus , 22.8 mm), which corresponded to the excellent freshness preservation ability. The fresh blueberries packaged with BF3 had less weight loss, reduced postharvest decay, and delayed softening, thus achieving a longer shelf life. In summary, BFs have a promising application prospect as a sustainable and effective packaging material for fruit preservation.
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高影响因子
CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Tingting Luo,Zihan Zhang,Nana Zhang,Yufei Liu,Kai Zhang,Lanlan Wei,Lijuan Long,Shuhao Qin,Min He,Jie Yu,Heng Luo
Wounds infected with Staphylococcus aureus ( S.aureus ) represent a significant healthcare challenge. The interaction between the bacterial cell membrane and functional groups of conductive materials induces deformation or rupture of the bacteria, thereby achieving an antibacterial effect. Conductive hydrogels mimic this phenomenon through localized current distribution, offering a promising therapeutic strategy. However, conventional conductive materials like PEDOT:PSS often suffer from phase separation in hydrogels, limiting their applications. To address these limitations, this study engineers a three-dimensional bacterial cellulose (BC) nanofiber template that utilizes hydroxy-mediated hydrogen bonding to adsorb and align PEDOT:PSS within the hydrogel matrix, forming continuous conductive pathways. The composite consists of a conductive moiety made of BC/PEDOT:PSS, which is incorporated into a hydrogel composed of polyvinyl alcohol, polyacrylic acid, and tannic acid. The resulting material achieves a conductivity of 11.1 S/cm and a tensile strain of 605.8 %, significantly surpassing existing benchmarks. The incorporation of BC greatly enhances the hydrogel's mechanical properties and conductivity, making it a promising candidate for wound healing applications.
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Case Studies in Thermal Engineering
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2025
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IF 6.4
Wenhui Bao,Yini Tan,Zhen Jia,Guoliang Li,Daxin Liang,Wanke Cheng,Hui Chen
Rising global building energy consumption underscores the urgent need for sustainable materials capable of passive thermal regulation. Regenerated cellulose, a renewable and biodegradable polymer, presents promising potential for energy-efficient optical systems; however, achieving reversible light modulation with precise solvent responsiveness remains a significant challenge. This study introduces an optically switchable regenerated cellulose membrane fabricated through an ionic liquid-based dissolution-regeneration process. The material incorporates dioctyl phthalate (DBP) to dynamically generate and remove microdroplet scattering domains during solvent exchange. The membrane exhibits exceptional optical properties: a transparent state with 95.2 % transmittance in ethanol/DBP and a scattering state achieving 78.5 % visible reflectance in water. Mechanistic investigations reveal that DBP microdroplets (∼5 μm) form due to their hydrophobic characteristics and long carbon chain structure, creating dynamic light-scattering interfaces. Thermal performance evaluation demonstrates a remarkable 14 °C temperature modulation between transparent and scattering states during summer conditions. In winter operation, the transparent mode increases indoor temperature by 13.9 °C with a heating power density of 269.2 W·m -2 . By integrating biodegradability, mechanical flexibility, and reversible optical switching capabilities, this membrane offers a groundbreaking solution for energy-adaptive window materials and sustainable building thermal management systems.
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