Natural Products and Bioprospecting
·
2024
·Vol. 14
·期 1
·1-12
·
IF 4.8
Shi Yuru,Zhang Xiaoqian,Pei Shengji,Wang Yuhua
Adenosma buchneroides Bonati, also known as fleagrass, is an important medicinal plant used by the Akha (Hani) people of China for treating inflammation-related skin swelling, acne, and diarrhoea, among other conditions. In this study, we aimed to evaluate the anti-inflammatory activities and explore the molecular mechanisms of fleagrass on treating skin swelling and acne. The results demonstrated that fleagrass inhibited the enzymatic activities of 5-LOX and COX-2 in vitro, and decreased the release of NO, IL-6, TNF-α, and IL-10 in the LPS-induced RAW264.7 macrophages. The levels of proteins associated with the nuclear factor-kappa B (NF-κB) pathway were examined by western blotting and immunofluorescence, demonstrating that fleagrass downregulated the expression of TLR4, MyD88, NF-κB/p65, and iNOS and blocked the nuclear translocation of NF-κB/p65. Furthermore, fleagrass exhibited acute anti-inflammatory activity in paw oedema models. The results confirm that fleagrass exhibits remarkable anti-inflammatory activity and can be used in alleviating inflammation, suggesting that fleagrass has the potential to be a novel anti-inflammatory agent. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 2
·1-13
·
IF 2.8
Hua Wanlu,Hu Chunyan,Xie Xiaoli,Gou Guangjun
The three-dimensional (3D) porous carbon materials are helpful for forming thin, light-weight, wide effective absorption bandwidth and strong absorption intensity absorbers. However, previous methods were not environmentally friendly enough. Thus, in this work, the Fe/Fe 3 C@porous carbon was synthesized from soluble starch and Fe(NO 3 ) 3 ·9H 2 O via chemical bowling and subsequent carbonization at 700 °C with different ratios. When the ratio of starch to Fe(NO 3 ) 3 ·9H 2 O is 1:1.5, the porous carbon exhibits a strong absorption ability with minimum reflection loss ( RL min ) value of −16.64 dB at 16.78 GHz, when the thickness is 1.75 mm and the proportion of paraffin wax is 30 wt%. The synergy of well impedance matching, sufficient loss performance, and interface polarization makes 3D porous carbon materials an excellent wave absorber. This work provides a good inspiration for studying outstanding performance microwave absorption materials.
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CATALYSIS LETTERS
·
2024
·
IF 2.3
Shao Yulin,Xie Ping,Han Yuning,Zhong Tianhao,Li Tao,Yu Yingmin,Zhao Qingshan,Li Zhongtao
In response to the problem that the conventional concentrated sulfuric acid catalyst for esterification reactions are prone to corrosion and generate large amounts of acid-containing wastewater, highly efficient gel resin-loaded ionic liquid solid acid (SA-ILs) catalysts were prepared by a one-pot method of loading ionic liquids onto gel resins. It is shown that the gel resin carrier has a strong water-absorbing structure, and the ionic liquids are covalently loaded on the gel resin carrier through chemical bonding, leading to SA-ILs catalysts with excellent acidity and good structural stability. With an optimal ionic liquid loading of 11% and acid density of 3.25 mmol·g −1 ,the synthesized SA-ILs catalysts showed good catalytic performance in the transesterification reaction between acetic acid and ethanol at 80 °C for 1.5 h. The catalyst dosage was 10 wt% of the total mass of acetic acid and ethanol, and the ethanol to acetic acid addition was at a molar ratio of 1.5:1. Ethyl acetate yields of up to 81% were achieved after the reaction. The catalyst also showed slightly decrease of the catalytic performance after reused for five cycles. The lower activation energy of the catalyst is proved to be the key to facilitate the catalytic transesterification reaction. Graphical Abstract
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Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Gao Hang,Zhu Yuqin,Luo He’an,Lv Yang,Liu Pingle
Co–xCaO/g-C 3 N 4 catalysts were prepared using incipient wetness impregnation method and applied in isophthalonitrile hydrogenation to M-xylenedimethylamine. The characterization results and experimental data indicate that introduction of CaO crates large number of basic sites and leads to electron rich Co, hence inhibits the side reaction and improves the selectivity to M-xylenedimethylamine. 10Co–2CaO/g-C 3 N 4 gives the best catalytic performance of 100% conversion of isophthalonitrile and 95% selectivity to M-xylenedimethylamine without any alkaline additives in the reacion system. This work is valuable for the design and preparation of hydrogenation catalysts with rich basic sites and provides a green process for nitrile compounds to amine.
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RARE METALS
·
2024
·
IF 9.6
Wan Wen-Qiang,Liang Kai-Ming,Zhu Peng-Yu,Chen Xiang-Yu,Li Zhen-Feng,Liu Shi-Yu,Zhang Shuai,Song Yang,He Peng,Wong Yew-Hoong,Zhang Shu-Ye
Wearable, flexible devices have garnered widespread attention in the realm of human motion and life activity detection. Currently, the development of simple, green, and easily scalable methods for fabricating strain sensors still presents significant challenges. In this study, we successfully modified the surface of reduced graphene oxide (rGO) with SnCuNiIn multi-component alloy nanoparticles (MCA NPs), with an average size of 13.29 nm, utilizing a green and facile microwave heating approach. Leveraging the SnCuNiIn MCA NPs/rGO powder, we formulated a conductive ink based on water and ethylene glycol, which, when screen-printed, yielded conductive patterns with a minimum resistivity of 4.366 mΩ·cm. Strain sensors produced using this ink demonstrate exceptional performance, demonstrating favorable resistance change rates during a single bending process that meets practical application requirements, and enduring 5000 bending cycles with a resistance change of less than 5%. These sensors exhibited a high gauge factor (GF max = 52.7) and outstanding cycling stability. Lastly, strain sensors are employed to monitor human normal life activities and motion states, showcasing significant potential for application in wearable electronic products. Graphical abstract
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JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 8
·1-13
·
IF 2.6
Wang Y. B.,Deng X. L.,Cao B. Y.,Feng H. P.,Chen J.,Li P. D.,Ren L.,Zhang M. Y.
In this article, a strategy is proposed to prepare highly toughened composites from polypropylene (PP), rice husk charcoal (RHC) and glycidyl methacrylate (GMA)-modified EPDM using melt blending and hot pressing. The structure of GMA-modified EPDM is confirmed by Fourier transform infrared spectroscopy (FTIR). The influences of the amounts of EPDM and GMA-modified EPDM on PP composites are investigated by virtue of mechanical properties testing, dimensional stability analysis, thermogravimetric analysis (TGA), X ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicate that the incorporation of GMA-modified EPDM significantly improves the toughness of PP composites and compared to PRHC the impact strength of PRKEG10 is up to the value of 537 J/m and increases by 555%, concurrently the tensile strength and modulus exhibit less decrease with the value of 8.22 MPa and 353 MPa, respectively. Shrinkage measurements show the dimensional change rates of length, width, and height decrease from 3.2%, 2.9%, and 3.3% to 1.73%, 1.46%, and 1.93%, respectively, improving the dimensional stability of PP composites. SEM reveals that shear yield and cavitation during the loading process lead to the excellent toughness of PP composites. This strategy provides a novel route to fabricate high ductility rice husk charcoal-based PP composites and expand certain industrial application.
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CELLULOSE
·
2024
·
IF 4.9
Zheng Jiaojiao,Cao Tianyu,Wang Jianxiao,Xu Wenhao,Qu Yihan,Wang Jiafen,Wu Yunlong,Song Yanyan,He Lizhong,Chen Xudong,Yang Jie,Qu Yinhu
Engineering the active layer of pressure sensors with micro-nano structures is increasingly important in improving their sensing properties, such as sensitivity and detection range. However, existing structures based on template methods continue to face manufacturing challenges and uncontrolled structures, making it difficult to optimize sensing performance. To address the aforementioned shortcomings, this study proposes highly tunable metallic silver copper micro-nano structures adapted on cotton fabric (AgCu/cotton) to adjust the interfacial contact sites and optimize the sensing properties. The shape, size, and distribution of the metallic AgCu nano structures are precisely regulated, and various distinctive morphologies including two-dimensional (2D) nanosheet stacking, three-dimensional (3D) irregular protrusions, and nanoparticle aggregation were obtained. Specifically, the 3D irregular protrusions of varying heights and shapes (nanosheets, nanoparticles, and so on), encouraging multiple deformations and enhanced interfacial contact sites. On the other hand, the hierarchical porous structure of cotton fabric enhances structural compressibility. Collectively, the synergistic results of the 3D irregular protrusions and the hierarchical porous structure allow for a high sensitivity (115.65 kPa −1 ), a quick response time (500 ms), and outstanding stability (2000 cycles). The above sensing properties enable the pressure sensor to be successfully applied in joint movement detection and swallowing recognition. The discovery could pave the way for a more cost-effective and widespread approach to a controlled and improved piezoresistive pressure sensor. Graphical abstract We herein develop a highly morphology-controlled AgCu/cotton flexible pressure sensor with an economical strategy toward superior sensing performance. Such regulated morphology is responsible for optimized contact sites and structural deformation, resulting in a high sensitivity of 115.65 kPa −1 over 2–7.5 kPa, and showing great potential in various human motion detections.
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Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 4
·1-14
·
IF 23.2
Wang Ping,Tian Hongyu,Liu Wenxiu,Lu Haibing,Liu Jiajia,Dong Shi,Xu Jie,Cao Tian,Shi Min,Huang Haopeng,Zhou Yiyang
By structural design, a new type of highly functional ionic liquid (NHFIL) was synthesized by combining 1-vinylimidazole with tris(2-chloroethyl) phosphate through a one-pot method. When it is melted into the polymer composite, the highly reactive vinyl of NHFIL promotes the cross-linking within the polymer system to enhance the compatibility between the inorganic filler and polymer matrix and further improve the mechanical properties of the composite, additionally, the N and P elements would generate non-flammable gas phase and carbonized layer during combustion, which endows the polymer composites with remarkable flame-retardant performance. On this basis, the low-smoke flame retardant ethylene–vinyl acetate (EVA)-based composites were prepared by introducing NHFIL into the industrial formula of the cable sheath material for maglev trains. The effects of the composition and molecular structure of NHIFL on the interfacial compatibility, microstructure, mechanical properties, and flame retardancy of composite materials have been studied in detail. The results indicate that with the addition of NHFIL, the cross-linking degree, gel content, thermal stability, mechanical properties, oil resistance, and the flame retardancy of the EVA-based composites were comprehensively improved. Significantly, with a low addition of 3.5% NHFIL, the gel content reaches 90.3%, the carbon residue reaches 42.7%, and the limiting oxygen index (LOI) reaches 36.3%, and surprisingly, the oil resistance increased by five times, which endows the composites with great application potential in cables of major transportation equipment.
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IONICS
·
2024
·Vol. 30
·期 6
·3279-3296
·
IF 2.4
An Ruifeng,Wang Bolun,Niu Hongkun,Liu Zhiwei,Gao Bingliang
CoSe 2 exhibits a high theoretical sodium storage capacity as an anode material for sodium-ion batteries (SIBs). However, it faces several challenges during electrochemical cycling, including the shuttle effect of sodium polyselenide, volume expansion, and poor electrical conductivity. To address these issues, this study proposes a novel approach to synthesize CoSe 2 @NC/CNTs materials using cross-linked PMMA spheres as templates. The resulting structure demonstrates a hollow core-shell configuration comprising nitrogen-doped carbon nanotubes (N-CNTs) and dispersed CoSe 2 nanoparticles. This is confirmed through characterization techniques such as XRD, Raman spectroscopy, SEM imaging, and TEM analysis, which verify the successful preparation. Moreover, XPS and TG analyses reveal the presence of strong interfacial interactions within the structure. These unique structural features enable CoSe 2 @NC/CNTs to exhibit exceptional sodium storage performance: remarkable stability (after 5000 cycles at 20 A·g −1 , the specific capacity only slightly decreases from 320 to 280 mAh·g −1 with a minimal degradation rate of 0.8% per cycle) and practicality (the specific capacity of the full battery NTO||CoSe 2 @NC/CNTs assembled with sodium nickel-iron-manganate oxide (NTO-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 ) remains at 323 mAh·g −1 after 120 cycles at a high current intensity of 5 A·g −1 ). Additionally, we elucidate the intrinsic reason behind the strong stability of CoSe 2 @NC/CNTs through SEM and EDS analysis after cycling while also providing ex situ characterization to explain their sodium storage.
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AAPS PHARMSCITECH
·
2024
·Vol. 25
·期 8
·1-18
·
IF 3.4
Zou Zhihui,Xue Yuanyuan,Adu-Frimpong Michael,Wang ChengWei,Jin Zhou,Xu Ying,Yu Jiangnan,Xu Ximing,Zhu Yuan
This study aimed to construct a self-microemulsion drug delivery system (SMEDDS) for Formononetin (FMN) to improve its solubility and bioavailability while combining the nanocrystals (NCs) technology. The SMEDDS prescription composition was optimized with a pseudo-three-phase diagram, followed by a series of in vitro and in vivo evaluations of the selected optimal prescriptions. FMN-NCs loaded SMEDDS showed a homogeneous spherical shape in the Transmission electron microscope and the particle size was measured as (20.65 ± 1.42) nm. The in vitro cumulative release rate in each dissolution medium within 30 min was higher than 80%, much higher than that of FMN (6%) and FMN-NCs (40%); Cellular experiments confirm that the formulation has a high safety profile and significantly promotes cellular uptake. The results of pharmacokinetics and intestinal absorption in rats showed that the relative bioavailability of FMN-NCs and FMN-NCs loaded SMEDDS were (154.80 ± 3.76)% and (557.73 ± 32.88)%, respectively, and both of them significantly increased the rate and extent of absorption of the drug in intestinal segments. FMN-NCs loaded SMEDDS significantly enhanced the solubility and bioavailability of FMN. Graphical
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·
IF 3.8
Liu Xuan,Cui Enna,Wang Mengxiao,Zhu Yujie,Li Hongliang,Guo Chao
We present a novel approach for iodide sensing based on the heavy-atom effect to quench the green fluorescent emission of organosilicon nanoparticles (OSiNPs). The fluorescence of OSiNPs was significantly quenched (up to 97.4% quenching efficiency) in the presence of iodide ions (I – ) through oxidation by hydrogen peroxide. Therefore, OSiNPs can serve as a fluorescent probe to detect I – with high selectivity and sensitivity. The highly selective response is attributed to the hydrophilic surface enabling good dispersion in aqueous solutions and the lipophilic core allowing the generated liposoluble I 2 to approach and quench the fluorescence of OSiNPs. The linear working range for I – was from 0 to 50 μM, with a detection limit of 0.1 μM. We successfully applied this nanosensor to determine iodine content in edible salt. Furthermore, the fluorescent OSiNPs can be utilized for the determination of total antioxidant capacity (TAC). Antioxidants reduce I 2 to I – , and the extent of quenching by the remaining I 2 on the OSiNPs indicates the TAC level. The responses to ascorbic acid, pyrogallic acid, and glutathione were investigated, and the detection limit for ascorbic acid was as low as 0.03 μM. It was applied to the determination of TAC in ascorbic acid tablets and fruit juices, indicating the potential application of the OSiNP-based I 2 sensing technique in the field of food analysis. Graphical Abstract
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Biomass Conversion and Biorefinery
·
2025
·
IF 4.1
Wang Yuanyuan,Dong Xingshen,Xia Yingjing,Song Hua,Liu Shetian
This study compares the effects of K 2 CO 3 and KOH on the preparation of porous carbon materials derived from the calyx husk of Physalis peruviana. Using the calyx husk of Physalis peruviana as the precursor, a series of porous carbon materials (PPCPC- x–y , PPCPC stands for porous carbon derived from the calyx husk of Physalis peruviana, where “x” represents the varying ratio of activator addition, and “y” represents the different activation temperatures) were prepared through carbonization combined with K 2 CO 3 . Experiments revealed that PPCPC-2–700 exhibits exceptional performance, characterized by abundant pore structure, high surface heteroatom content (N/O), high specific capacitance (311.3 F g −1 ), and excellent rate capability (capacitance retention of 81.0%). Compared to KOH, K 2 CO 3 offers a gentler activation process, requires less activator, operates at a lower temperature, thereby simplifying the preparation procedure and reducing the preparation time. The symmetric supercapacitor assembled from the porous carbon material activated by potassium carbonate demonstrates a high voltage window of 2.0 V in 1 M Na 2 SO 4 electrolyte and achieves a high energy density of 24.37 Wh kg −1 at a power density of 500 W kg −1 . Furthermore, this supercapacitor exhibits remarkable cycle stability in alkaline electrolyte, with a capacitance retention rate close to 98% after 12,000 charge–discharge cycles. In summary, K 2 CO 3 as an activator for the preparation of porous carbon materials exhibits significant advantages, not only facilitating a simple and efficient preparation process but also yielding materials with immense potential for application in the field of electrochemical energy storage.
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