Journal of Coatings Technology and Research
·
2023
·Vol. 21
·期 2
·761-771
·
IF 2.3
Gou Rui,Zhang Shihong,He Yi,Li Changhua,Li Hongjie,Sun Dan,Wu Guiyang,Yuan Xi,Chen Wen,Yan Jing
In this study, polyethyleneimine (PEI) was grafted on the surface of graphene oxide (GO) to prepare PEI-GO material. The PEI-GO/EP composite coating was successfully deposited on carbon steel through the cathodic electrophoretic deposition (C-EPD) process. The zeta potential, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), atomic force microscopy (AFM), and thermogravimetric analysis (TGA) methods were used to characterize the GO and PEI-GO materials. The dispersibility of PEI-GO in epoxy electrophoretic paint was studied by TEM and the fracture surface morphology of the coatings was observed by scanning electron microscope (SEM). Electrochemical impedance spectroscopy (EIS) studies evaluated the corrosion resistance of composite coatings. In summary, the impedance modulus of PEI-GO/EP composite coating is two orders of magnitude higher than that of neat epoxy coating, with enhanced anticorrosion performance.
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高影响因子
FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 3
·751-763
·
IF 2.2
Ma Yaqian,Lei Tongda,Yang Xue,Zhang Li,Wang Yongheng,Liu Jianhua,Li Xipeng,Yang Qingqi,He Sen,Fan Jie
Electrical stimulation with conductive biomaterials shows great promising to promote skin wound healing in practical application. In this study, polypyrrole@keratin nanofiber membrane (PPy@KNM) with good conductivity was prepared using electrospinning technology and chemical in situ polymerization of pyrrole monomers. Morphological, chemical, X-ray and surface analyses suggested that PPy was deposited on the keratin nanofiber membrane (KNM). The PPy@KNM with the highest conductivity and the largest tensile strength was prepared with an oxidant concentration of 0.6 M and a dopant concentration of 0.5 M of the p-toluenesulfonic acid (p-TSA). In vitro cell culture experiments revealed that the conductive PPy@KNM performed good biocompatibility and no cytotoxicity. Electrical stimulation via the PPy@KNM can reasonably accelerate cell growth and cell proliferation with an optimal current intensity of 80 μA and a stimulation time of 5 min/d. The research outcomes demonstrated that PPy@KNM is suitable to be applied as a functional biomedical material to promote wound healing.
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高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 31
·期 1
·1-12
·
IF 4.705
Yuan Yuka,Fu Zhe,Liu Yudong,Liu Kai,Hua Jing
Poly (L-lactic acid) (PLLA) suggests attractive biomedical applications in drug releasing system, surgical suture, bone fixing and tissue repairing due to its degradable and biocompatible benefits. However, currently developed catalysts with high toxicity and currently reported PLLA with uncontrollable crystallinity are detrimental for the environmental protection and human health. Herein, we proposed a novel and effective approach to synthesizing PLLA using environmentally-friendly bio-based phenol-substituted triisobutylaluminum as the catalyst. The effects of the chemical structures of various bio-based phenols on the polymerization activity and stereoregularity of PLLA were explored in detail. The increased steric hindrance of bio-based phenols was beneficial for the polymerization activity of PLLA. The resultant PLLA exhibited an ultrahigh monomer conversion efficiency up to 98.32% among the highest value of reported PLLA. Moreover, the PLLA also demonstrated quick polymerization rate (< 5 h) and low polymerization temperature (< 100 °C), with controllable polymer crystallinity (36 ~ 46%) and number average molecular weight (8400 ~ 16,000 g mol −1 ). Consequently, the strategy and results collectively represent a significant advance toward the preparation of high-performance degradable and biocompatible PLLA.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·Vol. 28
·期 8
·2669-2677
·
IF 2.6
Xia Xiaohong,Duolihong Bawurejiang,Ma Xiangdong,Yue Shan,Liu Rui
Electrochemical biosensor based on horseradish peroxidase (HRP) modified gold nanoparticle/sulfur-doped graphene (AuNP/SG) has been developed for the quantification of trans -resveratrol (Res). Gold nanoparticle (AuNP) was selected as the carrier for HRP due to its excellent electrochemical catalytic activity, biocompatibility, and conductivity, while sulfur-doped graphene (SG) was selected as the support for AuNP due to the defects introduced in the carbon network by sulfur doping can facilitate the high dispersion state of AuNP and HRP. The results show that the excellent sensing performance of the HRP/AuNP/SG is attributed to the high charge polarization of material after sulfur dropping and the co-catalysis of HRP and AuNP. For the detection of Res, linear response can be observed with high sensitivity and low detection limit (4 × 10 −8 M). Further, this electrochemical biosensor presents strong reproducibility, stability, and anti-interference capability in detecting Res. These unique properties make it an excellent choice for Res reliable detection.
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高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Liang Miao,Wang Yiqun,Dai Shuiping,Hong Liu,Li Ruili,Xu Zhenyu,Su Jiakun,Zhang Junsong
Cigar is a kind of air-dried tobacco raw material with different physical structures and chemical compositions compared with flue-cured tobacco. The pyrolysis and thermal release characteristics of cigar tobacco are important for advancing their use in heat-not-burn cigarette. In this study, the thermal release behavior of cigar tobacco with different glycerol additions under heating conditions was analyzed by thermogravimetric technique as well as a self-built infrared rapid heating furnace combined with GC–MS analysis. The results showed that the thermal weight loss process of cigar tobacco could be divided into three stages. The addition of glycerol exhibited significant impact on pyrolysis process, especially in the stage II, accompanied by a decrease in T max , an increase in DTG max , and weight loss at this stage. Thermal release kinetic analysis of stage II by Coats-Redfern method showed an increased activation energy and pre-exponential factor. With the amount of glycerol addition increasing, the total aroma components released from cigar tobacco showed a trend of first increasing and then decreasing at both heating rates, and reached the highest level when the glycerol addition amount was 20%. By means of multi-factor analysis of variance, the significance of heating rate and glycerol addition as well as the optimum combination between them that could maximize the release of various types of aroma components was determined. This study may be beneficial for the reasonable utilization of cigar tobacco in related products.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 11
·7047-7062
·
IF 5.7
Fei Guiqiang,Wang Yu,Wang Haihua,Zhang Wenjing,Shu Kewei,Sun Liyu,Tian Siyu,Niu Huizhu,Duan Yihao,Hu Guangyu,Wang Mengxi
High-performance supercapacitors are in an Increasing demand with tremendous energy consumption and technological progress. Reduced graphene oxide (RGO) is regarded as a promising electrode material for supercapacitor due to its high surface area and excellent electrochemical properties. However, restacking and lateral aggregation are still hampering the performance of RGO. In this study, the 3-chloro-2-hydroxypropyltri methyl ammonium chloride (QA) functionalized bacterial cellulose (QBC) was introduced to prepare novel QBC-RGO composites with superior electrochemical performance. The interaction between the QA group and BC resulted in further exfoliation of RGO sheets and improved electrolyte absorption. Therefore, RGO was uniformly dispersed in QBC matrix to form a fast electron transport network with facilitated electrolyte access. The maximum specific capacitance (356 F/g) of QBC-RGO electrode at 1 A/g was obtained in 1.0 mol/L H 2 SO 4 electrolyte in a three-electrode system, a value much higher than that of BC-RGO electrode (160 F/g). The energy density and power density of the QBC-RGO symmetrical supercapacitor were 31.6 Wh/kg and 400.0 W/kg, respectively. Moreover, 96.7% capacitance retention was found for QBC-RGO electrode after 10,000 cycles. The excellent performance of QBC-RGO3 electrode is derived from the continuous uniform 3D structure, good wettability, suggesting its great potential for energy storage devices. Graphical abstract
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高影响因子
Journal of Neuroinflammation
·
2024
·Vol. 21
·期 1
·1-16
·
IF 9.3
Chen Lushu,Zhang HuiYing,Zhang Ying,Li Xiumiao,Wang MeiHuan,Shen Yaming,Cao Yuan,Xu Yong,Yao Jin
Retinal neovascularisation is a major cause of blindness in patients with proliferative diabetic retinopathy (PDR). It is mediated by the complex interaction between dysfunctional ganglion cells, microglia, and vascular endothelial cells. Notably, retinal microglia, the intrinsic immune cells of the retina, play a crucial role in the pathogenesis of retinopathy. In this study, we found that lysophosphatidylserines (LysoPS) released from injured ganglion cells induced microglial extracellular trap formation and retinal neovascularisation. Mechanistically, LysoPS activated the GPR34-PI3K-AKT-NINJ1 signalling axis by interacting with the GPR34 receptor on the microglia. This activation upregulated the expression of inflammatory cytokines, such as IL-6, IL-8, VEGFA, and FGF2, and facilitated retinal vascular endothelial cell angiogenesis. As a result, inhibition of the GPR34-PI3K-AKT-NINJ1 axis significantly decreased microglial extracellular trap formation and neovascularisation by suppressing LysoPS-induced microglial inflammatory responses, both in vitro and in vivo. This study reveals the crucial role of apoptotic ganglion cells in activating microglial inflammation in PDR, thereby enhancing our understanding of the pathogenesis of retinal neovascularisation.
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PubMed
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2021
·Vol. 30
·期 6
·4543-4551
·
IF 1.819
Liu Fangfang,Chuan Xiuyun,Yang Yang,Huang Dubin,He Xin
Solid-state lithium batteries using solid-state electrolytes (SSE) improve both thermal stability and energy density compared with organic liquid electrolytes lithium-ion batteries (LIBs). However, their usage is still challenged by low lithium-ion conductivity and high interfacial resistance between SSE and electrodes, as well as difficulties running at room temperature (RT). Herein, we demonstrate an electrode/solid-state electrolyte interface, in which poly(ether-acrylate) (PEA) network was introduced on the surface of ceramic electrolytes via photo-polymerization, thus dramatically reducing the SSE/Li interfacial resistance from 4822 to 122 Ω cm 2 . As a result, the Li/Li cells can cycle over 500 h at 0.3 mA cm −2 , LiFePO 4 /Li delivers 200 cycles with capacity retention of 91.1% at RT, respectively. This research provides a method to improve the interface contact between SSE and electrodes, and offers possibilities for application of solid-state Li metal batteries under ambient condition.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Chen Tianhong,Yan Dongpeng
Long persistent luminescence (LPL) has gained considerable attention for the applications in decoration, emergency signage, information encryption and biomedicine. However, recently developed LPL materials – encompassing inorganics, organics and inorganic-organic hybrids – often display monochromatic afterglow with limited functionality. Furthermore, triplet exciton-based phosphors are prone to thermal quenching, significantly restricting their high emission efficiency. Here, we show a straightforward wet-chemistry approach for fabricating multimode LPL materials by introducing both anion (Br − ) and cation (Sn 2+ ) doping into hexagonal CsCdCl 3 all-inorganic perovskites. This process involves establishing new trapping centers from [CdCl 6-n Br n ] 4− and/or [Sn 2-n Cd n Cl 9 ] 5− linker units, disrupting the local symmetry in the host framework. These halide perovskites demonstrate afterglow duration time ( > 2,000 s), nearly full-color coverage, high photoluminescence quantum yield ( ~ 84.47%), and the anti-thermal quenching temperature up to 377 K. Particularly, CsCdCl 3 : x %Br display temperature-dependent LPL and time-valve controllable time-dependent luminescence, while CsCdCl 3 : x %Sn exhibit forward and reverse excitation-dependent Janus-type luminescence. Combining both experimental and computational studies, this finding not only introduces a local-symmetry breaking strategy for simultaneously enhancing afterglow lifetime and efficiency, but also provides new insights into the multimode LPL materials with dynamic tunability for applications in luminescence, photonics, high-security anti-counterfeiting and information storage.
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高影响因子
Systems Microbiology and Biomanufacturing
·
2022
·Vol. 2
·期 4
·634-642
·
IF 0
Zhou Hengrui,Gao Song,Zeng Weizhu,Deng Zhenshan,Zhou Jingwen
Citrinin is a common mycotoxin produced by different fungi. Although considerable endeavors have been made to increase citrinin output to meet the requirements of research and industrial needs, few methods are effective, owing to potential safety concerns and technical limitations. In this study, a blue fungus that produces a yellow pigment was isolated from Ziziphus jujuba . The strain was then identified as Penicillium citrinum and named HR-087. Preparative liquid chromatography was used to extract the yellow pigment. Both LC–MS and NMR assays showed that it was citrinin. To enhance the citrinin production of this strain, the culture medium was optimized through orthogonal experiments, as well as batch and fed-batch process. The final titer and productivity of citrinin reached 9.62 g/L and 0.1 g/(L × h), respectively. The high titer achieved indicates the possibility of large-scale production of high purity citrinin for low-cost supply for both academic and diagnostic analysis standard.
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Systems Microbiology and Biomanufacturing
·
2024
·
IF 0
Huang Yu,Li Hedan,Zhao Guihong,Hu Xiaoqing,Wang Xiaoyuan
The production of L-alanine was enhanced in Corynebacterium glutamicum ATCC13869 through metabolic engineering of the biosynthesis pathways of L-alanine and fatty acids. Strains Δ fasB , Δ fasBR , Δ fasB Δ pks13 and Δ fasBR Δ pks13 were constructed and exhibited increased L-alanine yields up to 17.29 g/L. Different from Δ fasB mutant constructed from C. glutamicum ATCC13032 in which L-glutamate production accumulated, the muatnt Δ fasB constructed from C. glutamicum ATCC13869 in this study significantly produce L-alanine without L-glutamate accumulation. Transcriptional level analysis revealed that the knockout of fasB upregulated the expression levels of the genes related to L-alanine synthesis but downregulated those associated with fatty acid synthesis, confirming the redirection of metabolic flux from fatty acid synthesis to L-alanine synthesis in these strains. L-alanine productions were further enhanced in strains Δ fasB and Δ fasBR through the combinatorial expression of heterologous genes Bacillus subtilis alaD encoding alanine dehydrogenase and Escherichia coli alaE encoding alanine export protein, and the yields reached 55.21 g/L and 54.95 g/L, respectively. Finally, 69.9 g/L L-alanine was obtained in Δ fasB /pJYW-5- alaDE after 60 h of fermentation by supplementing glucose. Our data indicate that disrupting the fatty acid biosynthesis could redirect metabolic flux towards L-alanine biosynthesis. These results provide a new strategy for increasing the production of L-alanine in C. glutamicum . Graphical Abstract
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Collagen and Leather
·
2023
·Vol. 5
·期 1
·1-13
·
IF 0
Dong Jinhong,Wang Tianyou,Li Haotian,Zhang Jianhua,Zhang Hengjie,Liu Weijie,You Xinru,Gu Zhipeng,Li Yiwen,Chen Xianchun,Fu Qiang
The development of advanced sustainable biomedical materials with superior biosafety and bioactivity for clinical applications is highly desirable. In the present investigation, biomass-based nanoparticles (NPs) were assembled through the Mannich reaction between the plant polyphenols and the broad-spectrum antibiotic tigecycline (TG). The fabricated NPs with uniform size demonstrated excellent oxidative balance effects, pH-responsive release properties and antibacterial performances. Furthermore, the intracellular and in vivo studies confirmed that the NPs are capable of reducing oxidative damage to cells and significantly repairing tissue injury in mice with peritonitis. This work presents an effective method and idea for constructing biomass-based materials for the treatment of infection-induced diseases. Graphical Abstract
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