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.
研究领域:
生物材料学
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纳米医学
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 12
·7023-7036
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IF 4.21
Zhou Man,Chen Jingwen,Jiang Mengting,Zhang Yakang,Liang Qian,Xu Song,Yao Chao,Li Zhongyu
A series of thickness-controlled SrTiO 3 (commonly abbreviated ST) anchored on carbonized bacterial cellulose (CBC) was successfully prepared by a novel route of freeze-drying assisted crystallization/carbonization. For the first time, the cross-linked bacterial cellulose served as a carbon source as well as structure-directing scaffold for the construction of ST/CBC composites. Characterizations exhibited cracks and defects on the surface of CBC which provided ideal anchoring sites for the dispersion and crystallization of ST. Additionally, the relationship between morphology and photocatalytic activity of ST/CBC was carefully investigated by photocatalytic reduction of potassium dichromate (K 2 Cr 2 O 7 ) and degradation of tetracycline in water. This unique biomass-derived carbon fibers provide an ideal platform for further design of perovskite based materials with enhanced catalytic performance.
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
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 6
·2476-2486
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IF 3.665
Yadong Wu,Dandan Ju,Fang Wang,Yudong Huang
Aramid nanofiber (ANF) has been regarded as an emerging excellent building block for preparing multifunctional high-performance composites, which are suitable for many applications in various fields. Based on this, for the first time, nanoscale bacterial cellulose (NBC) is used to modify ANF membrane via a direct blending followed with vacuum filtration. The chemical and physical structures of the NBC/ANF composite hybrid membranes (BAFM) are characterized by using Fourier transform infrared, X-ray diffraction, transmission electron microscope, and scanning electron microscope, demonstrating that NBC is well-dispersed into the ANF matrix. The two kinds of nanofibers twine together and interact with each other through hydrogen bonds, so that the tensile strength is enhanced from approximately 202–260 MPa by the incorporation of NBC. Besides, it is notable that the transparency retains due to the nanoscale diameter (much smaller than light wavelength) of the nanofibers, and the flexibility of the membranes is improved. Furthermore, the measurement of wettability shows that the hydrophilicity of the composite membranes could be improved by the addition of NBC, and the static water contact angle decreases from 85.6° to 63.5°. The adsorption process toward cationic (methylene blue, MB) and anionic (methyl orange, MO) dyes are preliminarily investigated, respectively. Due to the negatively charged ANF and the hydrophilic NBC, the BAFM exhibits selective adsorption ability toward MB, and the capacity could be improved by increasing the amount of NBC. Therefore, NBC is a desirable modifier for ANF to fabricate the composite, which is a promising candidate for transparent, flexible membranes with selective adsorption capacity.
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
CELLULOSE
·
2021
·Vol. 29
·期 2
·849-861
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IF 5.044
Chen Shiliang,Wu Zhijing,Fan Qiujin,Huang Jiachi
Abstract The understanding of interaction between graphene oxide (GO) and bacterial cellulose (BC) at molecular level is indispensable for meeting the goal of constructing a graphene-oxide-bacterial-cellulose (GOBC) nanohybrid and the fabrication of GOBC-based functional nanocomposites. In this paper, a GOBC with hierarchical three-dimensional (3D) framework was designed as a substrate for the metal phthalocyanine (Pc) catalyst. This substrate caused a remarkable enhancement of the catalysis of organic dye molecules. Firstly, GOBC was conveniently fabricated with one-step biosynthesis. The interaction mechanism at the molecular level between GO and BC was modeled with DFT quantum mechanics calculations that followed semi-empirical molecular dynamics studies to propose a structure. The formation of hydrogen-bond between O(3)-H and O(6)-H of BC and oxygen atom of GO was verified by core valence bifurcation and revealing noncovalent interactions theoretical analysis. Graphene-bacterial-cellulose (GBC) nanohybrid was then prepared by brief reduction of GOBC with N 2 H 4 and used for the direct immobilization of Pc catalyst. The catalytic activity of the Pc that was immobilized on the GBC nanohybrid was evaluated based on its catalytic oxidation of organic dyes, and a remarkable enhancement of the catalytic activity by the GBC substrate was observed. The electron transfer and the electrical structure state of the catalytic system were investigated by charge density difference and density of states theoretical calculations. An innovative catalytic mechanism of “substrate-driven enhancement” of the highly reactive metal phthalocyanine immobilized graphene-bacterial-cellulose nanocomposite was proposed based on both experimental and theoretical calculation results.
Graphical abstract
研究领域:
材料科学
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化学工程
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生物技术
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
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2022
·
IF 7.34
Tang Zhou,Lei Zhao,Dingsheng Wu,Quan Feng,Baobao Zhao
As an emerging and promising technology , photocatalytic technology can effectively remove trace organic pollutants such as tetracycline hydrochloride (TC-H, an antibiotic) in water. However, the research on photocatalysis is mainly focused on the powder photocatalyst, which is difficult to separate from the water body after use. Generally, fixing the photocatalytic material on a specific carrier can effectively avoid the above problems. In this article, we uniformly assembled g-C 3 N 4 on bacterial cellulose (BC) with 3D nanofiber network and enhance its catalytic activity by polypyrrole (PPy). Different from the modification of the photocatalyst in most studies, we have effectively improved the catalytic activity through the design of the support material and reactor in this work. The PPy@(BC/g-C 3 N 4 ) flexible membrane prepared has high-efficiency catalytic performance (64.28%, 2 h, TC-H) under a low-power xenon lamp (λ > 420 nm) in the reactor designed, which is 5.27 times the catalytic efficiency of the original BC/g-C 3 N 4 (12.20%, 2 h, TC-H). After 10 times of repeated use, it can stably retain more than 80% of the initial catalytic activity. Specifically, we propose to introduce oxygen in the active substrate generation stage and construct a photoelectrocatalytic reaction cell. This study can be used as a general strategy to prepare flexible membrane materials with high-efficiency catalytic properties.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
·
IF 6.064
Jia Liu,Shuxia Wang,Lei Jiang,Wei Shao
Kanamycin covalently grafted onto regenerated bacterial cellulose (RBC) membranes were constructed to prepare novel antimicrobial BC membranes. The prepared kanamycin grafted RBC membrane exhibits nanoporous three-dimensional network structure with a large surface area and high porosity. The antibacterial activity was explored and the result shows that the kanamycin grafted RBC membrane displays excellent antibacterial activity towards E. coli , C. albicans and S. aureus without any kanamycin leaching. Furthermore, MTT assay was carried out and the result demonstrates that the kanamycin grafted RBC membrane displays good biocompatibility.
研究领域:
生物材料学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
·
IF 10.319
Meng Zhu,Yuting Lei,Heng Wu,Luo Kong,Hailong Xu,Xuanxuan Yan,Yongjian Xu,Lei Dai
Exploring an advanced and efficient electromagnetic (EM) wave absorbing material by improving dielectric loss capacity and adjusting impendence matching is crucial yet challenging. Herein, the bacterial cellulose (BC) derived carbon aerogel (CA) with a robust nanofibrous network was used as a conductive loss scaffold to dissipate EM waves effectively, and the ZnO microparticles with excellent dielectric properties and low electrical conductivity were decorated on the scaffold to adjust dielectric parameters and impedance matching adequately. By using different zinc precursors, the tunable size and morphologies of ZnO crystals were obtained due to the growth rate of different crystallographic, including flower-like, nanorod like, and cauliflower-like morphologies, which is beneficial to strong multiple reflections, intensive interfacial polarization, better impendence matching, as well as excellent maintenance of the hierarchical structure. Owing to the appropriate impendence matching and the considerable EM wave dissipation, the CA@ZnO composites achieve a superior EM absorbing performance with a broad effective absorbing bandwidth (whole X band) and a minimum reflection coefficient (−53.3 dB). This work paves a new way for developing lightweight and highly efficient EM absorbing materials comprising the carbon scaffold and semiconductor microparticles.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 15
·期 1
·203
·
IF 4.967
Kewei Shu,Siyu Tian,Yu Wang,Guiqiang Fei,Liyu Sun,Huizhu Niu,Yihao Duan,Guangyu Hu,Haihua Wang
One of the most critical challenges for commercialization of sodium-ion battery (SIB) is to develop carbon anodes with high capacity and good rate performance. Graphene would be an excellent SIB anode candidate due to its success in various kinds of batteries. Liquid-phase exfoliation (LPE) method is an inexpensive, facile and potentially scalable method to produce less-defected graphene sheets. In this work, we developed an improved, dispersant-assisted LPE method to produce graphene composite materials from raw graphite with high yield and better quality for SIB anode. Here, bacterial cellulose (BC) was used as a green dispersant/stabilizer for LPE, a “spacer” for anti-restacking, as well as a carbon precursor in the composite. As a result, the carbonized BC (CBC)/LPE graphene (LEGr) presented improved performance compared to composite with graphene prepared by Hummers method. It exhibited a specific capacity of 233 mAh g−1at a current density of 20 mA g−1, and 157 mAh g−1after 200 cycles at a high current density of 100 mA g−1with capacity retention rate of 87.73%. This method not only provides new insight in graphene composites preparation, but also takes a new step in the exploration of anode materials for sodium-ion batteriesSIBs.Keywords:liquid phase exfoliation;bacterial cellulose;graphene composite;sodium-ion battery
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 10
·6507-6521
·
IF 5.7
Fan Lingling,Zheng Wenfeng,Yang Yuan,Sun Yan,Peng Songlin,Xu Jie,Yin Guangfu
Bacterial cellulose (BC)/polypyrrole (PPy) nanofibrous composites have been extensively studied in supercapacitors owing to their large specific surface area and excellent tensile strength. However, the inferior cycling stability due to structural pulverization of PPy impedes their potential applications. Herein, nanofibrous composite membranes of MXene, PPy and oxidized BC (TOBC) were prepared for flexible supercapacitor electrodes. The C6 primary hydroxyl groups of BC nanofibers were oxidized into aldehyde or carboxyl groups. Due to the enhanced interaction of TOBC with PPy and MXene, the TOBC nanofibers were horizontally wrapped on the MXene nanosheets and PPy was homogeneously deposited on the TOBC nanofibers. The flexible solid-state supercapacitors fabricated with the MXene@TOBC@PPy (TMP) electrodes achieved an areal specific capacitance of 928.9 mF cm −2 at 0.7 mA cm −2 and a capacitance retention of 85.5% after 5000 cycles. Therefore, the TMP electrodes could be a promising electrode material for flexible supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Xiaoxia Liu,Danyang Wang,Shuai Wang,Wuzhe Fan,Yulu Yang,Pengfei Gao,Maowen Chen,Weihu Yang,Kaiyong Cai
The biologically inert and excessive elastic modulus of Ti implant surface, as well as the excessive gap between implant and host, will lead to poor bone integration even implant failure. To solve the above problems, in this study, a method for functional Ti implant is reported, in which metal ions-containing bacterial cellulose (BC) coating is introduced in situ on the surface of Ti with complex shapes. Magnesium and strontium ions can be loaded into BC by in situ biosynthesis , which have great effects on the growth of bacteria and the structure of cellulose. In addition, both in vitro and in vivo experiments confirmed that the in situ preparation of functional BC coating on the Ti surface can integrate the operative crevices and promote osteogenesis. This simple and novel method for functional Ti implants has potential application value in clinical bone tissue repair and regeneration.
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yuanyuan Huang,Haixia Yang,Yunhua Yu,Haotong Li,Haokun Li,Jie Bai,Fei Shi,Jingxiao Liu
The use of environment-friendly biomass for the preparation of functional materials has attracted increasing attention. In this study, bacterial cellulose (BC) was prepared from fruit waste via kombucha fermentation without involving any secondary enzymatic hydrolysis treatments. A three-dimensional network of bacterial cellulose aerogels (BCAs) with ultralow density (5.693 mg/cm 3 ), high porosity (98–99%), and low thermal conductivity (23.4 mW/(m·K)) were obtained using two directional freeze-drying techniques. Here, the proposed freezing method can not only control the concentration of BC but make access to fibres reassembly by extremely low temperature freezing (−196 °C), which can further form a multi-stage pore structure. To increase their compressive resistance and optimise their ability to adsorb organic solvents and oils, the aerogels were subjected to chemical vapour deposition using methyltrimethoxysilane. The modified biomass aerogel exhibits a compression resilience exceeding 90% and achieves a hydrophobic angle of approximately 146.4°. This cost-effective, environmentally friendly, and highly efficient BCAs can be employed to treat oil spills and industrial waste.
研究领域:
材料科学
·
环境科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Luyao Bian,Jingchao Fu,Tingting Chang,Chuang Zhang,Chong Zhang
In response to the growing demand for biodegraded film with high mechanical properties for complex preservation application scenarios, we developed a curdlan (CD) blended films with exceptional mechanical strength through an alkali dissolution method. Notably, the alkali-soluble CD film exhibited five-fold increase in tensile strength (TS) when compared to its water-soluble counterpart. Furthermore, the inclusion of 2 % bacterial cellulose (BC) resulted in a significant 41.1 % augmentation of the film's TS. Thermal stability improvements were observed through differential scanning calorimetry (DSC) analysis and thermogravimetric analysis (TGA). X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) results provided insights into alterations in film crystallinity and intermolecular interactions. Specifically, the incorporation of 10 % CEO led to an additional improvement in TS. Our experimental investigations involving the packaging of chilled fresh meat with these blended films unveiled their capacity to effectively inhibit microorganism growth, maintain meat color stability, delay protein decomposition and fat oxidation , and extend the storage time up to 9 days. Our study offers a promising solution for food packaging, emphasizing the development of a high-strength degradable CD/BC/CEO blended film, which holds potential for extending the shelf life of food products.
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
危险品化学品经营许可证（带存储）