CELLULOSE
·
2024
·Vol. 31
·期 10
·6373-6385
·
IF 4.9
Du Wenfang,Li Hong,Luo Jie,Wang Yuxiao,Xi Qiang,Liu Jie,Yang Shengyuan,Li Junjie,Xiao Fubing
The development of wound dressing materials with both self-healing and antibacterial properties for promoting wound closure is highly desirable in health care. Herein, a smart double-network hydrogel (GS/DPPDH) with promising traits was developed by combining a dynamic Schiff base reaction between dialdehyde carboxymethyl cellulose (DCMC) and poly(ethylene imine) (PEI) with free radical polymerization. Because of its abundant amino groups, the common antibacterial drug gentamycin sulfate (GS) can be loaded into hydrogels by the formation of Schiff base bonds with DCMC. The slightly acidic wound microenvironment caused hydrolysis of the Schiff base bonds, thus releasing the drug GS on-demand. The prepared hydrogel not only showed good self-healing and injectable properties but also displayed excellent blood compatibility and cytocompatibility. The in vitro antibacterial experimental data proved that the GS/DPPDH had high antibacterial ratios of nearly 90% against both gram-positive ( S. aureus ) and gram-negative ( E. coli ) bacteria. In addition, in vivo assessment in a mouse model of S. aureus -infected full-thickness skin wounds revealed a wound closure ratio of 83.22 ± 2.90% after 7 days of healing, which was significantly greater than that in the gauze (59.78 ± 2.60%) and DPPDH (66.08 ± 0.21%) groups. Taken together, the results showed that the prepared antibacterial double-network hydrogel with injectable, self-healing, and pH-responsive properties exhibits great potential as a dressing material for infected wound healing.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Chen Wang,Li Wenxin,Jiang Jiahao,Yao Changyu,Li Li,Gao Hanyang
Silicon nanomaterials have received much attention due to their ability to adapt to large volume changes and thus avoid fragmentation. Studies have shown that two-dimensional flaky silicon particles (F–Si) have better mechanical stability than spherical silicon particles (S–Si), but the larger specific surface area of flaky silicon highlights the problem of chemical stability. A suitable binder can stabilize the surface of the silicon particles through interaction with the silicon particles. This work is a comparative study of various binder systems for S–Si and F–Si: sodium carboxymethyl cellulose (CMC), polyacrylic acid (PAA), and sodium alginate (SA). The relationships between the rheological properties of the electrode slurry, the functional group states of the silicon particles and electrode coatings, the state of the dried electrode surface, and the type of binder were investigated. The experimental analysis shows that CMC and SA as rigid binders exhibit better cycling performance in S–Si/F–Si electrodes due to their better dispersion states. The dispersion of S–Si electrodes with higher silanol (Si–OH) content is dominantly influenced by electrostatic repulsion, and that of F–Si electrodes with lower Si–OH content is dominantly influenced by bridging. The experimental analysis demonstrates that CMC and SA as rigid binders exhibit better cycling performance in S–Si/F–Si electrodes, respectively, due to their better dispersion states. The dispersion of S–Si electrodes with higher silanol Si–OH content is dominantly influenced by electrostatic repulsion, and that of F–Si electrodes with lower Si–OH content is dominantly influenced by bridging.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 5
·1815-1824
·
IF 2.2
Xu Jiwei,Zhao Hongjuan,Zhao Qian,Xiong Xiaoqing,Zheng Laijiu,Jiao Chengqi
The color-rendering abilities of esterified natural dyes are influenced by the structure of their parent dyes and the position at which the ester group is introduced, resulting in low efficiency in screening and synthesizing suitable esterified natural dyes for dyeing natural fibers with supercritical carbon dioxide. In this study, density functional theory was used to quickly screen the parent natural dyes and esterification position of natural dyes. The findings indicated that B3LYP/def2-TZVP level and CAM-B3LYP (ω = 0.01)/def2-TZVP level yield the most accurate UV–vis absorption spectra calculations for natural dyes and their esterified derivatives, as evidenced by the smallest error compared to experimental values. The rutin, the carminic acid, and the icariin as the parent dyes were more suitable for esterification, and the introduction of ester groups solely on the glycosides of these dyes had negligible impact on their color-rendering abilities. Furthermore, considering the influence of ester groups on natural dye solubility, it was observed that the dyeing properties of glycoside esterified products derived from rutin, carminic acid, and icariin were better than those of their parent dyes, rendering them more appropriate for dyeing natural fibers in supercritical carbon dioxide.
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JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Li Longyun,Xiao Kunkun,Zhang Jinpu,Du Ruihan,Kang Chunli
This study successfully synthesized a composite photocatalyst g-C 3 N 4 /PbTiO 3 through hydrothermal and calcination methods using PbTiO 3 and g-C 3 N 4 . The catalyst was characterized by XRD, FTIR, Raman, XPS, SEM, TEM, UV–vis DRS, PL, and other techniques. The results indicate that the composite photocatalyst exhibits efficient electron transfer, enhanced light absorption, effective separation and utilization of photogenerated electron–hole pairs, demonstrating superior photocatalytic activity. Under simulated sunlight, the removal efficiency of methyl blue (MB) with an initial concentration of 10 mg/L reaches 93.0% after 120 min. After five cycles, the degradation efficiency of MB is 79.2%, still maintaining 85% of the initial catalytic activity. The pH values in the range of 4.0–7.0, inorganic anions, and water quality have a minimal impact on the photocatalytic degradation of MB. Additionally, the composite photocatalyst exhibits strong removal capabilities for other pollutants, such as tetracycline. Therefore, the prepared catalyst demonstrates good feasibility for practical applications. Free radical quenching experiments indicate that hydroxyl radicals (·OH) are the primary active groups in the photocatalytic degradation of MB. Based on this, a photocatalytic mechanism involving a S-scheme heterojunction has been proposed. This study provides new insights into preparing PbTiO 3 composite semiconductors and constructing novel S-scheme heterojunctions.
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PubMed
JOM
·
2025
·
IF 2.3
Wang Ya-Long,Yang Xiao-Hui,Zhang Guo-Hua
A simple and effective method is proposed for producing polycrystalline La 1- x Ce x B 6 (LaB 6 , La 0.75 Ce 0.25 B 6 , La 0.5 Ce 0.5 B 6 , La 0.25 Ce 0.75 B 6 , and CeB 6 )-Al 2 O 3 ceramics. La 1- x Ce x B 6 solid-solution powders were first prepared by the reaction between lanthanum oxides, cerium oxides, boron carbide, and aluminum powders at 1573 K, during which a trace amount of Al 2 O 3 (1–3 wt.%) was inevitably introduced. Subsequently, highly dense (> 98.5%) La 1- x Ce x B 6 -Al 2 O 3 ceramics were produced using spark plasma sintering (SPS) technology at 1850°C, and the results revealed that the existence of Al 2 O 3 can enhance the mechanical properties of La 1- x Ce x B 6 by pinning the grain boundaries and refining the grains. Among the samples, the La 0.5 Ce 0.5 B 6 -Al 2 O 3 composition exhibited the most excellent mechanical properties, which were 22.8 GPa, 4.14 MPa m 1/2 , and 271 MPa for the Vickers hardness, fracture toughness, and flexural strength, respectively. Moreover, compared to the polycrystalline LaB 6 and CeB 6 bulks, the work functions of La 1- x Ce x B 6 bulks were lower, and the presence of Al 2 O 3 had a slight influence on the work function of La 1- x Ce x B 6 .
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Biology Direct
·
2024
·
IF 5.7
Hao Wang,Lei Zhang,Yunxiao Shang
Endoplasmic reticulum (ER) stress has been shown to play a pivotal role in the pathogenesis of asthma. DEPTOR (DEP Domain Containing MTOR Interacting Protein) is an endogenous mTOR inhibitor that participates in various physiological processes such as cell growth, apoptosis, autophagy, and ER homeostasis. However, the role of DEPTOR in the pathogenesis of asthma is still unknown. In this study, an ovalbumin (OVA)-induced mice model and IL-13 induced 16HBE cells were used to evaluate the effect of DEPTOR on asthma. A decreased DEPTOR expression was shown in the lung tissues of OVA-mice and IL-13 induced 16HBE cells. Upregulation of DEPTOR attenuated airway goblet cell hyperplasia, inhibited mucus hypersecretion, decreased the expression of mucin MUC5AC, and suppressed the level of inflammatory factors IL-4 and IL-5, which were all induced by OVA treatment. The increased protein expression of ER stress markers GRP78, CHOP, unfolded protein response (UPR) related proteins, and apoptosis markers in OVA mice were also inhibited by DEPTOR overexpression. In IL-13 induced 16HBE cells, overexpression of DEPTOR decreased IL-4, IL-5, and MUC5AC levels, preventing ER stress response and UPR process. Furthermore, from the proteomics results, we identified that SOD1 (Cu/Zn Superoxide Dismutase 1) may be the downstream factor of DEPTOR. Similar to DEPTOR, upregulation of SOD1 alleviated asthma progression. Rescue experiments showed that SOD1 inhibition abrogates the remission effect of DEPTOR on ER stress in vitro. In conclusion, these data suggested that DEPTOR attenuates asthma progression by suppressing endoplasmic reticulum stress through SOD1.
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PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Zhu Hongmei,Yang Bo,Niu Yang,Huang Yongjiu
Laryngeal cancer, a common malignant respiratory tumor, is primarily treated through surgery. However, challenges such as recurrence, metastasis, and drug resistance persist. In recent years, multifunctional drug delivery systems (DDS) based on nanoparticles have shown great potential in improving drug loading and release. We developed a biocompatible core-shell nanoparticle system with a zinc-based metal-organic framework (MOF) as the core, named CP1. The shell, composed of polyethyleneimine (PEI), folic acid, and calcium carbonate, forms a composite called CaCO 3 -PEI-FA. This system enhances biocompatibility and increases the efficacy of biomedical applications. Encapsulating CP1 within the CaCO 3 -PEI-FA shell allows for the targeted delivery of the anticancer drug doxorubicin (DOX) to laryngeal cancer cells (Hep-2), resulting in the CaCO 3 -PEI-FA@CP1@DOX system. The CaCO 3 -PEI-FA composite exhibits strong fluorescence with a peak around 350 nm, confirming successful synthesis and demonstrating its potential as a bioimaging probe. Importantly, the nanoparticle system without DOX showed low toxicity to normal human skin fibroblasts (HSF). In vitro cytology experiments revealed a 38% inhibition rate of Hep-2 cells after 24 h, highlighting the nanocomposite’s significant potential in inhibiting laryngeal cancer cell proliferation and inducing apoptosis, underscoring its promise in targeted laryngeal cancer therapy.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2024
·
IF 2.8
Tong Jiale,Huang Yeyin,Tang Wanjun,You Qingliang,Xie Guangyong
This work aims at developing a customized ammoxidation catalyst through optimizing the metal oxide content in CrVO 4 /SiO 2 catalysts. Various amounts of Cr–V–O with 1:1 molar ratio of Cr/V were successfully loaded on SiO 2 via spray-drying method with colloidal silica as the binder. Polarized light microscope illustrated that the CrVO 4 /SiO 2 particles presented as well dispersed microspheres in the microsize (20–80 μm). X-ray diffraction spectra confirmed the formation of monoclinic CrVO 4 phase wherein the metal oxide content was ranged from 30 to 70 weight percent. FT-IR spectra indicated that the introduction of metal oxide had no obvious effects on the skeletal structure of SiO 2 . X-ray photoelectron spectroscopy analysis revealed that the valence state of V and Cr was hardly affected with increasing the metal oxide content. Performances of the obtained CrVO 4 /SiO 2 catalysts with different metal oxide contents were investigated via the ammoxidation of a model compound, namely para-chlorotoluene (PCT) to para-chlorobenzonitrile (PCBN). A maximum conversion of 99.6% of PCT and 86.5% yield and 86.8% selectivity to PCBN have been obtained over the CrVO 4 /SiO 2 catalyst with 60% weight of metal oxides at a temperature of 410 °C, n( PCT): n (NH 3 ): n (air) = 1:3:15 and reaction load = 0.13 g/gCat·h. In addition, this catalyst was efficient and selective toward ammoxidation reactions of toluene, ortho- and meta-chlorotoluenes. Graphical abstract
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高影响因子
TRIBOLOGY LETTERS
·
2024
·Vol. 72
·期 2
·1-14
·
IF 2.9
Peng Feng,Fan Shuguang,Song Ningning,Gao Chuanping,Zhang Shengmao,Zhang Yujuan
Nickel acetyl acetonate (Ni(acac) 2 ), a metal-organic compound, was directly dispersed in base oils alkylated naphthalene (AN-5), diisooctyl sebacate (DIOS), poly-α-olefin (PAO6), and mineral oil (liquid hydrocarbon mixtures:150 N) in the presence of commercial dispersant RF1151 (monoallyl poly(isobutylene succinimide). The tribological properties of the lubricants were tested with a four-ball friction and wear tester. The friction-induced in-situ formation of carbon films on rubbed steel surfaces under the catalysis of Ni(acac) 2 was investigated, and the as-formed carbon films were characterized by scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results show that Ni(acac) 2 added in the base oils can decompose to form metallic nickel to form nickel layer on the rubbed metal sub-surfaces and catalyze the degradation of the base oil molecules adsorbed to form carbon-based tribofilms. The carbon film formed from AN-5 with aromatic ring structure has a high degree of graphitization and the best friction-reducing and antiwear abilities, and those formed from PAO6 and 150 N with linear structure have a low degree of graphitization as well as good tribological properties. Under the lubrication of DIOS with Ni(acac) 2 , however, there is no carbon film formation while the tribological properties of the lubricant are relatively poor, due to the absence of the catalytic metallic nickel and nickel oxide layer on the rubbed metal sub-surface. Thanks to the catalytic effect of metallic nickel released from Ni(acac) 2 for the degradation of various base oils with different molecular structure, the present approach could provide a rational pathway to tune the in-situ formation of carbon-based tribofilm on rubbed steel surfaces so as to effectively reduce the friction and wear of steel-steel sliding pair.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Kong Lingchen,Li Yu,Peng Cong,Zhao Ziyue,Xiao Junwei,Zhao Yimin,Feng Wei
The development of disordered Li dendrite and the adverse reaction between Li and electrolyte impede practical use of Li metal batteries (LMB). Herein, we propose quasi-two-dimensional fluorinated metal-organic framework carbon (q2D-FcMOF) that is utilized to construct artificial solid electrolyte interface (ASEI) to achieve robust interfacial protective double-layer. The outer organic layer provides ample space for Li deposition, while the inner inorganic LiF layer promotes conduction of Li + and blocks electron transport. Metal clusters within the hybrid layer are uniformly dispersed, encouraging Li + to cluster around metal active sites that are thermodynamically compatible with Li. Consequently, q2D-FcZ8@Li symmetrical batteries demonstrate an ultralong cycle life over 3600 h. When paried with commercial cathodes, the cells exhibite cyclability under conditions of high-loading, lean-electrolyte, even exposure to air for some time. This research suggests an effective method for fabricating ASEI using 2D quasi-ordered superstructure MOF NPs, which is expected to the development of LMB.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-15
·
IF 2.8
Ou Juhua,Dai Zilin,Kong Zhenxing,Yang Rui
A novel fiber-derived unsaturated polyester resin (UPR) was synthesized through alcoholysis and polycondensation by using PET and hybrid fibers as raw materials. The effects of alcoholysis conditions including alcoholysis time, temperature, initiator concentration, type of alcoholysis agents and amount of hybrid fibers on the alcoholysis behavior were investigated by HPLC, LC–MS and GPC. A comprehensive analysis of the fiber-derived UPR was conducted under different reaction conditions and discussed by FTIR, viscosity, acid value and mechanical properties. HPLC results indicated a strong correlation between the maximal peak area in spectrometry and the yield of main glycol products. It was established that the alcoholysis of PET with hybrid fiber samples mainly obtain alcoholysis monomers and dimers by using glycol as an alcoholysis agent. It was discovered that less alcoholysis products was obtained with lower diethylene glycol. The molecular weight of glycolyzed products are oligomers based on a alcoholysis reaction time reached above 3 h. Under the optimal conditions, PET: EG: zinc acetate = 1.0: 2.0: 0.3 (wt%), 200 ℃, 3 h, PET/PU was completely alcoholyzed and produced oligomers. The performance of liquid UPR and its cured product have been investigated. The UPR prepared by PET/PU was utilized as a fiber source unsaturated resin, meeting the standards for organic artificial stone. This article highlighted the potential usage of PET with hybrid fibers in unsaturated resin.
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高影响因子
危险品化学品经营许可证（带存储）