Biomaterials Advances
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2022
·
IF 0
Zong-Ju Chen,Yi Zhang,Liang Zheng,Hua Zhang,Hui-Hong Shi,Xiu-Cheng Zhang,Bing Liu
The preparation of bioactive materials with biomolecules as templates to control the nucleation and growth of nano-hydroxyapatite (n-HA) crystals is a vital research field in bone tissue engineering. However, meeting the performance requirements of possessing appropriate surface roughness, high porosity, structural stability, adequate mechanical strength, biodegradability and biocompatibility at the same time is the core issue that restricts the development of these biomimetic materials in biosciences as well as medical clinical translation. In this work, a mineralized self-assembled silk fibroin (SF)/cellulose interpenetrating network composite aerogel (M-S-C) material was prepared by freeze-drying using sol-gel and in situ mineralization strategy. The effects of the main factors, such as the surface properties of SF macromolecules and the change of mineralization time, on the n-HA self-assembly process and the property of M-S-C under defined conditions were explored. The properties of M-S-C, including the physicochemical properties, morphology, mechanical property, degradation behavior and in vitro cytotoxicity, were investigated to evaluate its application prospects in bone tissue engineering. M-S-C exhibits the microstructure required for an ideal cancellous bone repair material, porosity up to 99.2%, high thermal stability, moderately adjustable compressive strength (12.7–22.4 MPa), and appreciable in vitro degradation rate. Moreover, M-S-C extracts can significantly accelerate the proliferation of human embryonic kidney cells. This mineralized interpenetrating polymer network aerogel material with excellent comprehensive performance shows potential for application in bone repair and regeneration.
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PubMed
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1168-1179
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IF 11.806
Liu Huayu,Xu Ting,Liang Qidi,Zhao Qingshuang,Zhao Dawei,Si Chuanling
The investigation of electrodes with excellent electrochemical and mechanical properties is the key to achieve flexible supercapacitors. Herein, a nanocellulose-based carbon aerogel with 3D porous structure for high performance composite electrodes of compressible supercapacitors is proposed. Cellulose nanofibril (CNF) is used to construct the elastic network structure of carbon aerogel. Graphene oxide (GO) mainly acted as the skeleton in the carbon aerogel to prevent shrinkage of nanocellulose during the carbonization process. The as-prepared carbon aerogel displayed outstanding compressibility (undergoing a strain of 80%) and elasticity (96% stress retention after 2000 compressive cycles at 30% strain). Furthermore, highly flexible and solid-state supercapacitors using cellulose nanofibrils/reduced graphene oxide (CNF/RGO) carbon aerogels as electrodes are fabricated. Due to the porous structure and outstanding mechanical properties of the electrodes, the assembled supercapacitors exhibit excellent electrochemical properties with good cycle stability (82% retention after 5000 cycles). Therefore, this research provides a simple and effective method for fabricating well-designed structured electrodes for compressive energy storage devices. Graphic Abstract
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高影响因子
POLYMER
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2023
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IF 4.6
Zhi-Xiong Fei,Ji Lan,Jingrui Sun,Chenxiao Yin,Ling-Ying Shi
Flexible ionic conductors with excellent mechanical properties , stability and conductivity from green and efficient fabrication technology have great application potentials in the intelligent devices. In this work, we reported an ionic conductor fabricated from the polymerization of the polymerizable deep eutectic solvent (PDES) reinforced by the hydroxyethyl cellulose (HEC). The PDES with the cationic hydrogen bond acceptor as the polymerizable unit was synthesized from the methacrylate of the 2-choline bromide (ChBrMA) as hydrogen bond acceptor and the glycerol (Gly) as hydrogen bond donor. The PDES has solubility to dissolve the HEC and thus the HEC-reinforced poly (PDES) ionic conductors were successfully prepared by one step photopolymerization . The addition of HEC enhanced the mechanical strength of poly (PDES)-based ionic conductor. The ionic conductors present the characteristics of good elasticity, puncture resistance, heat resistance and low volatility, and their electrical conductivity reached 2 × 10 −2 S/m at room temperature . Finally we assembled a flexible sensor which can accurately detect the movement of human fingers and monitor the change of environmental temperature in real time, demonstrating their potentials in the multifunctional sensors with long-term durability.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2023
·
IF 8.4
Li Yan,Xugang Dang,Mao Yang,Wenjia Han,Yanchun Li
Carboxymethyl cellulose (CMC) has potential applications in food packaging given its good processibility and biological properties. In this research, dialdehyde carboxymethyl cellulose (DCMC) was first modified with polyamidoamine (PAMAM G0) to synthesize hyperbranched dialdehyde carboxymethyl cellulose (HPD). Then, a novel hyperbranched dialdehyde carboxymethyl cellulose-grafted gelatin (HPD/Gs) film was obtained by the “one-pot” method. The structural characteristics, degree of cross-linking, thickness, swelling behavior, water solubility, water vapor permeability, surface morphology, hydrophilicity, mechanical strength, antibacterial properties, and biocompatibility of HPD/Gs were characterized by using Fourier transform infrared (FTIR), scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDS), X-ray diffractometry (XRD), thermogravimetric analysis/derivative thermogravimetry (TGA/DTG), differential scanning calorimetry (DSC), and other analysis technologies. The results revealed that the prepared HPD/Gs film showed good thermal stability and mechanical properties. In particular, when the mass ratio of HPD to G was 1:1.5, the cross-linking degree, swelling behaviors, water vapor permeability (WVP), water contact angle, tensile strength, and elongation at break of the HPD/1.5G film reached 42.757%, 109.114%, 46.71 g·mm/m2·day·kPa (1 day), 115.4 ± 4.5°, 1.77 MPa, and 320.93%, respectively. Moreover, the HPD/Gs films had good cytocompatibility and antibacterial properties against Staphylococcus aureus and Escherichia coli. The research indicated that the designed HPD/Gs are a type of green antimicrobial material with potential value.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Anxiang Chen,Xia Li,Wenjia Han
In this study, we prepared spherical cellulose nanocrystals (S-CNCs) and stabilized n-hexadecane Pickering emulsions in conjunction with graphene oxide (GO), exploring the interaction between S-CNCs and GO in the emulsions. Both S-CNCs and GO are amphiphilic and synergistically stabilize Pickering emulsions by adhering to the surface of oil droplets and within the emulsion space through hydrogen bonding. GO's two-dimensional sheets assemble into a 3D network structure, further improving the stability of Pickering emulsions. Consequently, the stability of Pickering emulsions can be adjusted by altering the S-CNCs/GO ratio, modifying the spatial distribution relationship of stabilizers in the emulsions. At an S-CNCs concentration of 1 g/L and a GO concentration of 3 g/L, the Pickering emulsion demonstrated excellent stability and exhibited no delamination after 31 days of storage. Thus, the S-CNCs/GO combination serves as an effective Pickering emulsion stabilizer, utilizing the synergistic effect between the two components.
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高影响因子
Membranes
·
2021
·Vol. 12
·期 1
·23
·
IF 4.106
Jizhen Wang,Shaoyang Liu,Xu Yan,Zhan Jiang,Zijing Zhou,Jing Liu,Guangting Han,Haoxi Ben,Wei Jiang
Environmentally friendly face masks with high filtration efficiency are in urgent need to fight against the COVID-19 pandemic, as well as other airborne viruses, bacteria and particulate matters. In this study, coaxial electrospinning was employed to fabricate a lithium chloride enhanced cellulose acetate/thermoplastic polyurethanes (CA/TPU-LiCl) face mask nanofiber filtration membrane, which was biodegradable and reusable. The analysis results show that the CA/TPU-LiCl membrane had an excellent filtration performance: when the filtration efficiency reached 99.8%, the pressure drop was only 52 Pa. The membrane also had an outstanding reusability. The filtration performance maintained at 98.2% after 10 test cycles, and an alcohol immersion disinfection treatment showed no effect on its filtration performance. In summary, the CA/TPU-LiCl nanofiber membrane made in this work is a promising biodegradable and reusable filtration material with a wide range of potential applications, including high-performance face mask.Keywords:electrospinning;Cellulose;degradable;TPU;LiCl;air filtration
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高影响因子
RENEWABLE ENERGY
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2021
·
IF 8.001
Feng Shen,Ye Li,Xiaoya Qin,Haixin Guo,Jialu Li,Jirui Yang,Yongzhen Ding
Formic acid (FA) is one of the most promising vectors for sustainable hydrogen energy and it can be synthesized from renewable biomass resources . In this work, a range of heteropolyacid derived temperature-responsive catalysts (Ch n H 4-n PMo 11 VO 40 , n=1–3) were prepared by modifying H 3 PMo 12 O 40 heteropolyacid with an oxidation site V 5+ and temperature-responsive monomer choline chloride (Ch + ), and used for the cascade conversion of biomass derived cellulose into FA via hydrolysis-oxidation in water. The ChH 3 PMo 11 VO 40 with a Ch/H ratio of 1/3 exhibited an outstanding catalytic performance to give a 49.5% yield of FA at 165 °C after 3 h reaction time. Catalytic activity of Ch n H 4-n PMo 11 VO 40 was found to be related to its amount of H + and V 5+ , while the recyclable ability of Ch n H 4-n PMo 11 VO 40 was found to be related to its amount of Ch + . The as-prepared catalyst could be perfectly recycled with a single decrease the temperature of reaction systems, and be reused four times with limit loss in catalytic activity. The developed temperature-responsive catalysts have both advantages of homogeneous catalyst and heterogeneous catalyst , which should have potential application in other reactions of lignocellulosic biomass valorization.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 47
·22354-22360
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IF 3.591
Li Zha,Yahui Zheng,Jianfei Che,Yinghong Xiao
In recent years, the cellulose sponge has become an attractive material for bone tissue materials in tissue engineering. However, cellulose with hydroxyl groups shows weak apatite nucleation ability in simulated body fluid (SBF). In this study, cellulose/sodium alginate (SA) composite sponges were prepared via freeze-drying technique. The incorporation of SA in the cellulose matrix effectively increased the macroporous ability of composite scaffolds. Furthermore, the phosphate groups were grafted onto the surface of the composite sponges by esterification reaction in order to induce the formation of an apatite crystal. The morphology and structure were characterized by Fourier transform infrared spectrometer, scanning electron microscope, X-ray diffraction and X-ray photoelectron spectroscopy. The results showed that the deposition of apatite nanoparticles on the surface of phosphorylated composite sponges was very robust, and the spherical apatite nanoparticles were aggregated into rod-like apatite crystals. The Ca/P molar ratio of HA on the surface of the phosphorylated cellulose/SA composite sponge was 1.45. In addition, sponges with biocompatibility were demonstrated by CCK8 assay and Live/Dead fluorescence staining of L929 cells. The L929 cell activity of both cellulose/SA and phosphorylated cellulose/SA composite sponge extracts were higher than 80%. We draw a conclusion that the biocompatible mineralized phosphorylated cellulose/SA composite sponges show potential to be applied as a bone repair material.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
·
IF 6.953
Shumin Zhang,Jican Hao,Fang Ding,Xuehong Ren
Reactive oxygen species (ROS) for treating bacterial infection is an alternative strategy to overcome the drawbacks such as bacterial resistance of commonly used antibiotics. Nanocatalysts have been proved highly effective in regulating intracellular ROS level due to their intrinsic enzymes-mimicking ability. Herein, we prepared a carbon-based nanozyme doped with copper atoms with peroxidase mimetic activity to catalyze the decomposition of bio-safety dosage of H 2 O 2 to highly reactive OH radicals for antibacterial treatment. Furthermore, we designed the thermo-responsive nanogels consisting of bacterial cellulose nanowhiskers as the carrier of the nanozyme. The obtained nanogels displayed remarkable intelligent response to temperature change with sol-gel transition temperature of ~33 °C and in situ gel forming ability. Moreover, the nanogels exhibited excellent biocompatibility in vitro , along with remarkable antibacterial efficacy which could inactivate 6.36 log of S. aureus and 6.01 log of E. coli in 3 h, respectively. The findings provide a novel strategy for advancing the development of nanocatalysts-based responsive biomaterials for treating bacterial infections.
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高影响因子
RENEWABLE ENERGY
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2021
·
IF 8.001
Jun Zhang,Chengyu Li,Haoran Yuan,Yong Chen
In the present study, Ru modified hierarchical zeolites x Ru-MZSM were developed for cellulose fast pyrolysis . Comprehensive catalyst characterizations including XRD , XPS , N 2 adsorption-desorption, Py-IR and so on, were performed to unveil the essential structural properties. The chemical modification and Ru decoration remarkably regulated the distribution of Brønsted/Lewis acid sites. The presence of RuO x species would supply abundant strong Lewis acid sites for participating catalytic cracking , dehydration, decarbonylation, decarboxylation, cyclization, aromatization, etc., in cooperation with Brønsted acid sites. In-situ generated active Ru 0 centers during cellulose pyrolysis might facilitate the proceeding of deoxygenation , hydride transfer, and dehydrogenation . Among the as-prepared catalysts screened, 2Ru-MZSM was much more efficient in aromatics production from cellulose fast pyrolysis compared to parent ZSM, wherein the total aromatics yield achieved 16.8% at temperature of 650 °C and heating rate of 10 °C/ms with corresponding E value as low as 23.40 kJ/mol. Also, plausible reaction mechanism for x Ru-MZSM involved cellulose fast pyrolysis was proposed in detail.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2021
·
IF 8.198
Zece Zhu,Lifan Zeng,Wei Li,Di Tian,Weilin Xu
Organic persistent luminescence is usually emitted from synthesized materials containing π units (aromatic rings, double bonds, etc.). It is challenging but desirable to develop organic materials from renewable resources with tunable persistent luminescence to reduce environmental impact. Herein, we proposed an effective method to enhance the luminescence of cellulose, the most abundant natural renewable material free of π units. It was found that removing the crystal water in cellulose would increase the compactness of molecular packing and stabilize the hydroxyl clusters of polysaccharide chains, consequently leading to significant enhancement of phosphorescence with lifetime up to subseconds. This dehydration induced luminescence enhancement was found in not only purified cellulose but also cellulose-contained substances such as papers, cottons, and many other plant tissues. This indicated easier access to cellulose-based luminescence materials without chemical purification. In addition, label-free time-resolved luminescence imaging of plant tissues was achieved on a smartphone-based apparatus, since endogenous cellulose is distributed extensively in plants. Compared with synthetical luminophores, cellulose is a renewable and biodegradable source abundant in nature, not only readily available but also environmentally friendly. We believe this method may be used to develop other sustainable organic luminescence materials with a lack of π units for various optical applications.
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高影响因子
ACS Omega
·
2021
·
IF 3.512
Mingzhu Yao,Chen Liang,Shuangquan Yao,Yang Liu,Hui Zhao,Chenni Qin
The adsorption of hemicellulose derived from bagasse onto nanofibril cellulose has been studied in terms of kinetics and thermodynamics. In situ monitoring of bagasse hemicellulose with different molecular weights onto the nanofibril cellulose surfaces has been investigated using quartz crystal microbalance and dissipation. Then, the adsorption kinetics and thermodynamic properties were analyzed. Also, the sorption behavior and the adsorption layer properties were quantified in aqueous solutions. The maximum adsorption mass was 2.8314 mg/m2 at a concentration of 200 mg/L. Also, compared with that of the low-molecular-weight hemicellulose, the adsorption capacity of the high-molecular-weight hemicellulose was higher, and the adsorption rate changed faster and could reach an equilibrium in a shorter time. The intraparticle diffusion kinetic model represented the experimental data very well. Therefore, the kinetics of hemicellulose on the fiber adsorption was commonly described by a three-stage process: mass to transfer, diffusion, and equilibrium. The Gibbs energy change of the adsorption of hemicellulose was found to range from −20.04 to −49.75 kJ/mol at 25 °C. The entropy change was >0. It was found that the adsorption was spontaneous, and the adsorbed mass increased with the increase in temperature. This strengthened the conclusion that the adsorption process of the bagasse hemicellulose on the NFC was driven by the increase in entropy caused by the release of water molecules due to hydrophobic interaction or solvent reorganization.
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高影响因子
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