CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Qikui Man,Xueheng Zhuang,Zhenkuang Lei,Shiqi Zhu,Lining Pan,Yu Gao,Guoguo Tan
For obtaining the ecofriendly microwave absorbing composites, flake carbonyl iron was mixed to the flotation carbon waste of titanium slag by ball-milling processes. The composites of 4 h ball-milling present excellent microwave absorbing performance of minimum reflected loss (RL) of −54.9 dB at 7.8 GHz with thickness of 2.6 mm. The same composites provide the performance of RL < −10 dB with the thickness from 1.2 mm to 5 mm at corresponding matching frequency from 3.3 GHz to 18 GHz. It means that the absorbing peak can be tunable at the wide frequency range with only adjusting the thickness. The strong absorbing intensity and wide tunable frequency range are attributed to the proper impedance matching of dielectric property from flotation carbon waste of titanium slag and magnetic property from carbonyl iron. Also, this work provides a research approach for handling industrial waste which contains carbon.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 43
·2306785
·
IF 19
Jian Sheng,Zhen Han,Guodong Jia,Sheng Zhu,Yifan Xu,Xinrui Zhang,Yixi Yao,Yan Li
Integrating 1D carbon nanotubes (CNTs) and 2D graphene with covalent bonds can inherit the outstanding properties of both components and obtain additional advantages. Here, this work reports the preparation of covalently bonded graphene/CNT (G/CNT) structure by a normal chemical vapor deposition method. Specifically, the pre-synthesized defects on the sidewall of CNTs act as nucleation sites for the growth of graphene sheets to form a branch-leaf structure. Graphene leaves restrict the sliding and re-stacking of CNTs, endowing G/CNT hybrid demonstrates excellent anti-agglomeration properties that are not present in either graphene or CNTs. In addition, the covalently bonded structure and high graphitization degree of graphene sheets and CNTs significantly enhance the comprehensive properties of the G/CNT hybrid material, such as large specific surface area, excellent thermal stability, and high electrical conductivity. Consequently, the microwave absorption properties of G/CNT are significantly enhanced compared with CNTs. This work provides a feasible pathway to synthesize high-performance covalently bonded G/CNT hybrids.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 11
·2311454
·
IF 19
Cong Liu,Meng Meng,Zhiyu Yang,Shaobin Wu,Ludan Shang,Yuanji Feng,Jiayan Wu,Kai Hao,Ruonan Wang,Danhua Zhou,Shasha He,Yanhui Li,Huayu Tian
Stimulus-responsive large-scale cell culture microcarriers are promising biological materials for large-scale cell production. Herein, multifunctional thermal and magnetic microcarriers (TMMs) made of poly( N -isopropylacrylamide) (PNIPAM), polylysines (PLLs), gelatin methacryloyl (GelMA), poly(ethylene glycol) diacrylate (PEGDA), N,N -methylenebis(acrylamide) (MBA), Fe 3 O 4 and SiO 2 are prepared to achieve large-scale enzyme-free cell harvesting and also can be used as cells stereogrowth scaffold to mimic cells suspension state to develop novel application, such as recombinant proteins produced. In TMMs, NIPAM and other materials are mixed and then underwent in situ radical polymerization by UV irradition with 2-hydroxy-2-methylpropiophenone as initiator, in which GelMA provides cell adhesion sites and PLLs enable a positive microenvironment with SiO 2 as filler. As enzyme-free cell microcarriers, cell harvesting from TMMs by PNIPAM are achieved at 25 °C through vortex oscillation within 15 min and TMMs can be recycled at least for four times by magnetic recovery. Moreover, TMMs can be used as stereoculture scaffold to let cells in suspension as adherent state to improve gene transfection efficiency. Combined with magnetothermal effect, TMMs can further improve gene transfer to obtain industrialization of proteins expression. Therefore, TMMs are potential for the development of cell manufacturing and the expansion of cell stereogrowth application for recombinant proteins production.
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Food & Function
·
2023
·
IF 6.1
Su Zhou,Zhelu Bao,Shicheng Ma,Cansong Ou,Hao Hu,Yunyun Yang,Xinyu Feng,Yani Pan,Shuying Gong,Fangyuan Fan,Ping Chen,Qiang Chu
The prevalence of oral health problems is ubiquitous in contemporary society, with particular emphasis placed on the central role of oral flora in mitigating this issue. Both ancient literature and modern research have highlighted the promising application of tea with substantial bioactive properties, particularly dark tea, in preserving and promoting oral health. Liubao tea, a widely consumed dark tea with increasing popularity in recent years, has been reported to possess abundant bioactive constituents, exhibit remarkable antioxidant and anti-inflammatory effects, modulate the flora structure and so on. It may be a promising candidate for addressing oral health problems. In this study, Liubao tea was meticulously extracted, purified and identified, followed by an investigation of its potential to modulate oral microecology by virtue of an acetic acid-induced oral disorder murine model. The results revealed that Liubao tea extract (LTE) application commendably reconstructed the oral mucosal barrier, promoted tissue regeneration and mitigated micro-inflammation. Furthermore, LTE treatment could also ameliorate the oral flora composition by decreasing the abundance of Proteobacteria and increasing the abundance of Firmicutes and Actinobacteria at the phylum level, as well as inhibiting pernicious bacteria such as Streptococcus and Delftia acidovorans. So, it could promote the generation of a beneficial microenvironment and regulate the immune process. Overall, LTE demonstrated remarkable potential in regulating the balance of oral microecology, suggesting that it may represent a promising therapeutic strategy for oral health concerns.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ping Li,Shuo Liu,Kang Li,HaiyunZhai,Qing Zhou,Yufang Pan
We studied the electrochemical behaviour of Clobetasol Propionate (CP) on a multi-walled carbon nanotube-modified carbon paste electrode (MWCNTs-CPE) and developed a corresponding determination method. Sample solutions were scanned using cyclic voltammetry (CV) with a homemade MWCNTs-CPE as a working electrode in KH 2 PO 4 -Na 2 B 4 O 7 buffer solution (pH=4.90), and the peak potential and peak current of the cyclic voltammogram were recorded. CP showed a clear oxidation peak near 1.16 V, and the CP concentration exhibited an excellent linear relationship with peak current in the range of 1.0×10 -4 to 1.0x10 -6 mol/L, with a correlation coefficient of 0.999 and a detection limit of 3.45×10 -8 mol/L. The content of CP in a facial mask was determined by this method, the recovery rate was between 98.0% and 106.2% in the presence of interfering substances, and the relative standard deviation (RSD) ranges between 2.0% and 4.1% (n=5). The MWCNTs’CPE showed a good electrochemical response to CP and possessed high sensitivity. This method can be applied to the determination of CP in cosmetics and pharmaceuticals.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Qing ZHOU,Ning Long,Lan LIU,Haiyun ZHAI,Mingfang ZHU
A highly selective molecularly imprinted polymer modified carbon paste electrode was developed. The Moxifloxacin Hydrochloride molecularly imprinted polymer was synthesized by thermal initiation precipitation polymerization, and the modified electrode was prepared by mixing graphite and polymer (90:10). Studied the electrochemical behavior and established the determination method of Moxifloxacin Hydrochloride at the electrode. The results showed that the sensor has high selectivity and sensitivity. and exhibited a linear voltammetric response for Moxifloxacin Hydrochloride in the concentration range of 3.13×10 -6 ~2.0×10 -4 mol•L -1 , with the limit of detection (LOD) of 5.9×10 -8 mol•L -1 (S/N=3). The sensor was applied to determine Moxifloxacin Hydrochloride in Avelox tablets and and human serum samples. The recoveries of Moxifloxacin Hydrochloride ranged from 97.2% to 104.5%.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Menghui Liu,Yunzhi Wang,Yanlv Chen,Liujun Li,Yang Sun,Yongchao Li,Yajun Yuan,Pan Lu,Wenkai Zhang,Pengfei Pang,Xin Peng,Hong Shan
Endovascular embolization can selectively deploy embolic agents into diseased or injured blood vessels to complete the treatment. However, traditional embolic agents still face challenges, such as poor intravascular diffusivity, non-biodegradable, unstable mechanical properties, radiolucency, and recanalization. Herein, we report a poly (lipoic acid-tannic acid)/tromethamine/Galinstan (PLTTG) dimethyl sulfoxide (DMSO) solution-derived hydrogel liquid embolic agent. By injecting PLTTG DMSO solution into body fluids, a PLTTG hydrogel can be formed in situ owing to the solvent exchange induced intra- and inter-polymer hydrogen bonding and electrostatic interactions. Moreover, the gelation time and injection forces of the solution as well as the mechanical properties and embolic pressure of the obtained hydrogels can be adjusted by changing the concentration of PLTTG. The PLTTG hydrogel can effectively embolize the renal artery and femoral vein without recanalization and displacement in rabbit models. Furthermore, the hydrogel can embolize the ruptured femoral artery to arrest active bleeding. Owing to the advantages of the hydrogel, including adjustable gelation time, mechanical properties, viscosities, injection forces, and embolic pressure, as well as good biocompatibility and biodegradability, radiopacity, excellent embolization performance and intravascular diffusivity, easy usage, low cost, allowing it to be a potential embolic agent to treat multiple vascular diseases in clinic.
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Biofabrication
·
2023
·
IF 9
Jianpei Dong,Jianhua Zhou,Hao Tang,Baiqi Chen,Lu Huang
Cell-laden hydrogel microstructures have been used in broad applications in tissue engineering, translational medicine, and cell-based assays for pharmaceutical research. However, the construction of cell-laden hydrogel microstructures in vitro remains challenging. The technologies permitting generation of multicellular structures with different cellular compositions and spatial distributions are needed. Herein, we propose a laser-guided programmable hydrogel-microstructures-construction platform, allowing controllable and heterogeneous assembly of multiple cellular spheroids into spatially organized multicellular structures with good bioactivity. And the cell-laden hydrogel microstructures could be further leveraged for in vitro drug evaluation. We demonstrate that cells within hydrogels exhibit significantly higher half-maximal inhibitory concentration values against doxorubicin (DOX) compared with traditional 2D plate culture. Moreover, we reveal the differences in drug responses between heterogeneous and homogeneous cell-laden hydrogel microstructures, providing valuable insight into in vitro drug evaluation.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Laiquan Lv,Shengyao Huang,Chengyue Zhou,Weiwei Ma
Chemically activated biochar, which is characterized by its high surface area, thermal stability, and chemical compatibility, exhibits great potential for loading phase change material (PCM) to enhance heat transfer and prevent leakage. However, conventional chemical activation processes typically involve highly corrosive and toxic chemical activators that pose environmental hazards. Biochar that is activated by K 2 CO 3 , which achieves high porosity while minimizing adverse environmental effects, has been applied in some fields. In this study, K 2 CO 3 was employed as a chemical activator, and five waste biomass materials were utilized as precursors to produce biochar samples for the loading of paraffin (PA), stearic acid (SA), and polyethylene glycol (PEG). The results revealed that the activated biochar derived from corncob (CC) exhibited remarkable textural characteristics, and it had a specific surface area of 1053.95 m 2 /g and a total pore volume of 0.467 cm 3 /g. Additionally, owing to its larger specific surface area and richer textural characteristics, the loading capacities of CC for PA, SA, and PEG were as high as 78.79 %, 80.83 %, and 85.19 %, respectively. Furthermore, introducing PA, SA, and PEG into CC resulted in thermal conductivity enhancements of 1.460-, 1.138-, and 1.271-fold, respectively. Lastly, incorporating biochar improved the thermal stability of the composite PCMs. This study aimed to explore the performance of the biochar activated by K 2 CO 3 in PCM loading, enhancing the environmental sustainability of waste biomass-derived activated biochar in PCM loading applications.
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TALANTA
·
2023
·
IF 6.1
Zeying Yang,Boyong Cao,Xiaowei An,Zhongliang Yu,Wuduo Zhao,Fangcheng Su,Guoqing Guan,Yanhao Zhang,Zhengkun Xie,Baoxian Ye
The rapid and sensitive determination of antioxidant N-(1,3-dimethylbutyl)-N′-phenyl- p -henylenediamine (6-PPD) in the environment is crucial for early intervention to prevent its adverse effects. Here, a reliable electrochemical sensor based on a N–C mediated γ-Mo 2 N nanocomposite (γ-Mo 2 N@N–C) modified carbon paste electrode (CPE) was developed and applied for selective and sensitive determination of 6-PPD. Benefiting from the superior stability and faster electron diffusion coefficient , the peak current responded to 6-PPD on the sensor linearly over a concentration range from 5 × 10 −8 mol L −1 to 1.0 × 10 −5 mol L −1 with a detection limit of 1.67 × 10 −8 mol L −1 (4.48 ng mL −1 ). Moreover, the sensor maintained good anti-interference ability in the determination of 6-PPD in soil samples from different regions in Zhengzhou City. Furthermore, the density functional theory (DFT) calculations combined with kinetics analysis proved that the enhanced basicity of the γ-Mo 2 N@N–C facilitated the deprotonation of 6-PPD, with the preferred orientation facet of (200) in γ-Mo 2 N playing a vital role in inducing the dissociation of 6-PPD, thereby improving the sensor's response. Such an electrochemical sensor, with its good stability and superior sensitivity, has the potential to be applied for real-time evaluation and monitoring of environmental pollutants .
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高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 11
·8049-8062
·
IF 5.2
Xiu Wang,Meiling Yan,Jun Yu,Weiang Luo,Guorong Chen
Paraffin is a potential thermal energy storage material, but leakage and flammability are the two major problems affecting its storage and safe use. Here, a novel flame retarded paraffin/epoxy resin composite was developed by using paraffin, epoxy resin and hollow metal organic framework (W-UiO66-PPA) as thermal energy storage material, supporting material and flame retardant, respectively. The thermal energy storage and flame retardancy performances were examined with differential scanning calorimetry, vertical burning, limiting oxygen index and cone calorimeter tests. The results show that the paraffin/epoxy resin retains intact without leakage when the content of paraffin reaches 40 wt%, and this material exhibits high melting latent heat and remarkable thermal recycling property. In addition, the flame retarded paraffin/epoxy resin shows excellent flame retardancy, which is attributed to the following three aspects: (1) the hollow structure with open vertices of W-UiO66 is capable of absorbing and collecting the combustible gasses produced by the combustion of epoxy resin; (2) the Zr and W elements of W-UiO66 can facilitate catalytic charring and form a dense char layer; (3) phosphorous-containing free radicals are able to capture OH· and O· free radicals during the combustion of paraffin and epoxy resin, thus interrupting the combustion chain reaction. On the whole, the flame retarded paraffin/EP possesses excellent thermal energy storage, thermal recycling, and flame retardancy properties. Our work provides a fantastic inspiration for the rational design of other flame retarded form-stable phase change materials.
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ChemistrySelect
·
2023
·Vol. 8
·期 29
·e202300694
·
IF 2.1
Haitao Meng,Xuecong Pan,Xuemei Li,Haijun Meng,Shouzhu Li
Graphical An efficient and durable hydrophilic SiO 2 fiber membrane was designed by a template-free strategy combined with electrostatic spinning technology. The material can perform separation of oily wastewater under gravity-only conditions and has demonstrated high separation performance for effective separation of oil-water mixtures and oil-in-water (O/W) emulsions. The discharge of oily wastewater seriously affects human health and the sustainable development of the ecological environment. Therefore, developing oil-water separation materials capable of removing organic pollutants is imperative. In this study, we report the preparation of a SiO 2 nanofiber membrane based on tetraethyl orthosilicate (TEOS) using a template-free strategy combined with electrostatic spinning technology. The prepared SiO 2 nanofiber membrane was characterized using SEM, EDX, FT-IR, AFM, XRD, CA, and TG techniques. The prepared SiO 2 nanofiber membranes exhibit excellent hydrophilicity (WCA=0°) in air and oleophobicity (UWOCA=136°) underwater, with excellent anti-pollution properties for gravity-driven oil-water separation. The SiO 2 nanofiber membrane can effectively separate different kinds of oil-water mixtures with high water flux (4420 L m −2 h −1 ) and excellent separation efficiency (99.1 %), with a flux loss of 5.65 % after ten cycles, indicating excellent cycling stability. In addition, it can also be used to separate various oil-in-water emulsions stabilized by surfactants with a separation flux higher than 2079 L m −2 h −1 and a separation efficiency maintained at more than 97 %. During the separation of 150 mL lotion, the membrane was seriously scaled due to long-term pollution. Simple water washing could not restore the membrane flux, and the irreversible scaling rate was 50.74 %, which seriously affected the continuous separation. However, due to the excellent thermal stability of SiO 2 nanofiber membranes, oil contaminated membranes can be heated and regenerated, resulting in a flux recovery rate of nearly 100 %. Overall, this material has a wide range of potential applications in environmental protection, especially in the treatment of oily wastewater, due to its simple fabrication method, high flux, and superb oil resistance and recyclability.
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