CHEMOSPHERE
·
2021
·
IF 7.086
Hanyu Wu,Jie Chen,Zengbo Su,Bin Ma,Yizhe Ji,Shuhan Lin,Dingfang Xu,Mingliang Kang
Europium(III), i.e., Eu(III), is chemically analogous to the trivalent lanthanides (Ln) and actinides (An). A good understanding of the adsorption behaviour of Eu(III) on mica group minerals is critical to the safety evaluation of the radioactive contamination. Nevertheless, the structural complexity of micaceous minerals makes it difficult to draw a consistent conclusion in the study of Eu(III) migration. In this work, we contrastively studied Eu(III) adsorption on dioctahedral muscovite and trioctahedral phlogopite as functions of pH, ionic strength, background electrolytes, interaction sequence, and fulvic acid (FA). Batch experiments showed that Eu(III) adsorption on both micas was strongly dependent on pH but quite independent on ionic strength that is determined by Na + . Planar sites are available on both muscovite and phlogopite while interlayer sites only on phlogopite under Na + and Ca 2+ electrolytes (not for K + and Cs + ). An interlayer expansion of phlogopite, as indicated by a newly appeared diffraction peak at ~6° 2-theta, occurred along with Eu(III) adsorption, which was also confirmed by transmission electron microscopy . Furthermore, the initial Eu(III) concentrations, the concentration ratios between Eu(III) and Cs + , and the reaction sequences of Eu(III)-electrolytes-FA affected both the adsorption behaviour of Eu(III) and reversely the structural alteration of phlogopite. The sequential extraction showed that the adsorbed Eu(III) was mainly in the ion-exchangeable form while the addition of FA could increase the portion of coordinative species. The currently proposed Eu(III) adsorption mechanism can shed new light on predicting the migration of Ln/An(III) at the mica-rich solid-liquid interface on a molecular scale.
研究领域:
环境科学
·
放射化学
·
矿物学
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DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 98
·期 1
·24-30
·
IF 2.326
Lu Qingjian,Gao Min,Lu Chang,Pan Taisong,Cheng Tiedong,Long Fei,Lin Yuan
Vanadium dioxide (VO 2 ) has unique electrical and optical properties, which have practical applications in many devices. However, preparing high-quality VO 2 films and transferring them to flexible substrates by an economic and simple way are still challenging. Functional thin films can be grown on van der Waals (vdW) substrates and then transferred to flexible substrates due to the weak interaction between films and their substrates. Herein, VO 2 thin films were grown on mica substrates by using the polymer-assisted deposition technique. By controlling the ion concentration in the polymer precursor solution, a flat seed layer was prepared at the initial growth stage. It was found that the introduction of the seed layer can improve the crystallinity, increase the grain size and reduce the defects of the VO 2 thin films. It is believed that less nucleation density and layered growth at the initial growth stage are critical to the formation of large size grains. Our results confirmed that chemical solution deposition can prepared high-quality VO 2 films on vdW substrates.
研究领域:
材料科学
·
表面科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Junying Xiao,Zhidong Pan,Ti Zhang,Youjun Lu,Yanmin Wang
Mica/(Ni, Sb)-co-doped rutile yellow composite pigment with a high near-infrared reflectance was prepared via mechanochemical pretreatment and subsequent sintering. (Ni, Sb)-co-doped rutile yellow pigment was synthesized by a solid-phase method in the presence of sodium fluoride (NaF) as a mineralizer, and mica was peeled by ultrafine grinding . The pigment, mica and mica/pigment composite were characterized by X-ray diffraction, laser diffraction particle size analysis , nitrogen gas adsorption method, scanning electron microscopy, energy dispersive spectroscopy, ultraviolet–visible–near-infrared spectroscopy, CIE L * a * b * color scales, and infrared irradiation image, respectively. The results show that the temperature of synthesizing a pure rutile pigment in solid-phase reaction is reduced by 100°C due to the addition of mineralizer NaF. (Ni, Sb)-co-doped rutile pigment has better color rendering performance and near-infrared (NIR) reflectance. Ultrafine grinding produces the finer flatty mica particles with fresh reflective surfaces, thus improving NIR reflectance of peeled mica. In mica/pigment composite prepared via mechanochemical pretreatment and subsequent sintering, peeled mica has a synergistic effect on (Ni, Sb)-co-doped rutile pigment particles to further scatter near-infrared radiation through the multiple layer reflections, leading to a better heat insulation . The high near-infrared reflectance of composite pigment increases to 97.72%, and the b * value of the pigment synthesized with 1 wt% NaF is 37.77. For the irradiation infrared lamp, the surface temperature of aluminum plate coated with mica/(Ni, Sb)-co-doped rutile yellow composite pigment is 40.1 ± 0.2°C, which is lower than that of aluminum plate uncoated determined by thermal camera and thermocouple. When aluminum plate coated with mica/(Ni, Sb)-co-doped rutile yellow composite pigment is under sunshine, its surface temperature is 38.6 ± 0.2°C. In addition, the mechanism of preparing the composite pigment via mechanochemical pretreatment and subsequent sintering and the multiple structure reflection effect on peeled mica surface coated with (Ni, Sb)-co-doped rutile yellow pigment particles were also discussed.
研究领域:
材料科学
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化工
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颜料技术
·
热绝缘
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Mohamed M. Abdel-Halim,Zhongyu Wang,Zhenyi Hu,Xuesong Jiang,A. Shahboub,Zongrong Zhou,Boyuan Ban,Jian Chen
A new collector, N-Oleyl-1, 3-propanediamine (NOPDA), has strong collecting power and excellent selectivity. • NOPDA achieves effective separation of mica and quartz using a low dosage a 0.016 mmol/L at pH 2.5. • NOPDA preferentially adsorbs onto mica surfaces through hydrogen bonding and electrostatic interactions. • NOPDA is demonstrated as a new flotation collector for the mica surface with high-efficiency separation. The selective separation of mica from quartz remains a significant challenge because of their similar physicochemical properties. In this study, a cationic diamine collector, N-oleyl-1,3-propanediamine (NOPDA), was evaluated for the flotation separation of mica from quartz under acidic conditions. Single-mineral flotation results demonstrated a substantial recovery difference of approximately 84%, with mica recovery reaching 95%, whereas quartz recovery remained low (10.91%) at pH 2.5, indicating a strong selectivity. Mixed-mineral flotation further confirmed effective separation, yielding a concentrate enriched in mica-associated components, including Al 2 O 3 (33.05%, 94.41% recovery) and K 2 O (11.39%, 98.46% recovery), with a relatively low SiO 2 recovery (32.50%). The flotation mechanisms were analyzed through zeta potential testing, contact angle, zeta potential, FTIR, and XPS analyses, which revealed that NOPDA preferentially adsorbs on mica surfaces, significantly enhancing hydrophobicity, whereas only weak interactions were observed on quartz. The adsorption mechanism is primarily attributed to the electrostatic attraction and hydrogen bonding of the protonated amine species with the surface Al–O and Si–O sites of the adsorbent. Density Functional Theory (DFT) calculations indicated that the adsorption energy difference between NOPDA on mica and quartz was 2.75 eV, which is consistent with the flotation results. Overall, these findings demonstrate that NOPDA exhibits promising selective flotation performance for mica–quartz separation under acidic conditions. The combined flotation experiments, surface characterization, and DFT analysis provide insights into the preferential adsorption behavior of NOPDA on the mica surface. Download: Download high-res image (175KB) Download: Download full-size image
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DOI
高影响因子
INVESTIGATIONAL NEW DRUGS
·
2023
·Vol. 41
·期 5
·664-676
·
IF 3.4
Pan Mingzhu,Liu Yali,Sang Tian,Xie Jiajun,Lin Huishu,Wei Jianpeng,Shao Shuai,Zheng Yanying,Zhang Juan
Liposomal doxorubicin exhibits stronger drug accumulation at the tumor site due to the Enhanced Permeability and Retention (EPR) effect. However, the prognosis for the patient is poor due to this drug’s lack of targeting and tumor metastasis during treatment. Vascular epidermal growth factor receptor (VEGFR2) plays an important role in angiogenesis and cancer metastasis. To enhance antitumor efficacy of PEGylated liposomal doxorubicin, we constructed a VEGFR2-targeted and doxorubicin-loaded immunoliposome (Lipo-DOX-C00) by conjugating a VEGFR2-specific, single chain antibody fragment to DSPE-PEG2000-MAL, and then we inserted the antibody-conjugated polymer into liposomal doxorubicin (Lipo-DOX). The immunoliposome was formed uniformly with high affinity for VEGFR2. In vitro, Lipo-DOX-C00 enhanced doxorubicin internalization into LLC and 4T1 cells compared with non-conjugated, liposomal doxorubicin. In vivo, Lipo-DOX-C00 delivered DOX to tumor tissues effectively, which exhibited an improved antitumor and anti-metastasis efficacy in both LLC subcutaneous tumor models and 4T1 tumor models. In addition, the combined therapy of a VEGFR2–MICA bispecific antibody (JZC01) and Lipo-DOX-C00 achieved enhanced inhibition of cancer growth and metastasis due to activation of the immune system. Our study provides a promising approach to clinical application of liposomal doxorubicin.
研究领域:
肿瘤学
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药学
·
免疫疗法
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药物递送系统
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癌症生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaolai Zhang,Luxing Wei,Xiaoyong Qiu,Tianbiao Wu,Yiming Zhao,Baohua Hu,Teng Yang,Haichao Fu,Shuai Chen,Jun Huang
Okra is an important vegetable that is rich in mucilage, which is a promising and environment friendly bio-lubricant due to its excellent physicochemical and lubrication properties. In this work, the adsorption behavior and lubrication mechanism of purified okra mucilage on model surfaces ( e.g., freshly-cleaved mica) were systematically investigated using nano-mechanical techniques such as surface force apparatus and atomic force microscopy. Experimental results indicate that thin layers of okra-mucilage coatings are built up within 120 min after injecting diluted mucilage solution between two mica surfaces. Moreover, the confined mucilage layers can serve as good bio-lubricants and exhibit anti-wear performance. Because of the varying film thickness and configuration of adsorbed mucilage films, the measured friction coefficient (μ) is lower on hydrophobic silane ( e.g., octadecyltrichlorosilane) modified mica (μ ∼ 0.07) than that on hydrophilic mica (μ ∼ 0.12). Additionally, it is demonstrated that the incorporation of okra mucilage into the polyacrylamide hydrogel network could further reduce the interfacial friction by one order of magnitude at high loads (friction coefficient μ < 0.01). This work provides fundamental insights into the adsorption and lubrication behavior and mechanisms of water-based bio-lubricants on solid substrate, which contributes to the developing of environment friendly bio-lubricants for various applications.
研究领域:
材料科学
·
生物学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2026
·
IF 3.4
Chen Linyang,Xing Zheng,Liu Weiwei,Luo Jing
In this article, a series of acrylic ester copolymer hyperdispersants with different chemical structures (anchoring segments and solvated segments) were designed and synthesized by free radical polymerization and used to disperse mica in UV-curable systems. The influence of anchoring segments and solvated segments of the polyacrylic hyperdispersant on the dispersion of mica in UV-curable coating as well as the coating properties was systematically investigated. The dispersion performance of the hyperdispersants was investigated by rheology measurement, mechanical property, and anticorrosion property (via electrochemical impedance spectroscopy and neutral salt spray test) of the UV-curable coatings. It was found that the optimum anchoring segment and solvated segment of the polyacrylic hyperdispersant for dispersing mica in UV-curable systems were N-isopropylacrylamide (NIPAM) and butyl methacrylate (BMA), respectively. With the addition of p(BMA- co -NIPAM), the viscosity of the UV-curable resin system with mica decreased obviously. Moreover, the negative effect of mica on the mechanical properties of the UV-curable coatings was significantly mitigated, and the coating exhibited outstanding anticorrosion performance. The electrochemical low-frequency impedance value of the coating remains above 10 9.0 Ω cm 2 for 40 days without any decrease. After 1,200 h of neutral salt spray testing, only slight pitting corrosion was observed on the coating surface.
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DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Xinyi Zhang,Zhaoqing Lu,Doudou Ning,Nan Li,Kaiyue Huang,Dinggen Hu,Songfeng E
Nanofiltration (NF) membranes hold considerable promise for desalination and water reuse. However, the trade-off between permeability and selectivity restricted their efficient applications. Herein, we successfully prepared thin-film nanocomposite NF membranes with mica nanosheets interlayer (M-TFNi) by introducing polyethyleneimine-modified mica nanosheets between the porous support layer and the polyamide (PA) layer, which exhibited superior permeance along with high divalent salt rejection. Owing to the “tortuous effect” of PEI-mica nanosheets and hydrogen bonding interactions, the diffusion rate of piperazine (PIP) was slowed down, which resulted in the formation of a thinner and looser PA layer with higher surface roughness and hydrophilicity. The optimized M-TFNi membrane demonstrated an exceptional permeance of 16.24 L m −2 h −1 bar −1 in 1000 ppm Na 2 SO 4 solution at pH of 8 and a high Na 2 SO 4 rejection of 98.8 % at 4 bar, which is enormously higher than that of the pristine NF membrane without the PEI-mica nanosheets as interlayer. Overall, this work devised a new approach to fabricating high-performance NF membranes for efficient water purification.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Bo Ma,Wei Guo,Jixiang Zhang,Cui Liu,Nian Li,Shudong Zhang,Zhenyang Wang
Radiation-cooled films accompanying the required high solar reflectance and emissivity as well as environmental durability are challenging to develop for passive daytime radiant cooling (PDRC) applications. Herein, an inorganic dielectric scatterer, producing strong scattering in the visible to near-infrared wavelength band, had been constructed by tunable TiO2 nanorod arrays with high refractive index on the surface of 2D Mica nanosheets with good mechanical strength and chemical stability. Subsequently, radiation-cooled aramid composite films featuring a well-organized 2D layered stack structure of inorganic scatterer was developed for PDRC applications. By the feature inorganic scatterers effectively stimulating multi-level scattering of light through TiO2 nanorod arrays and multi-layered Mica structures, the radiation-cooled aramid composite films have ultra-high reflectivity of 97.5% and emissivity of 96.3% in sunlight, and achieve subambient cooling of 8.62°C for daytime and 4.84°C for nighttime. Meanwhile, the well-organized lamellar PDRC films possess high strength (98 MPa) as well as excellent environmental durability, including scratch-resistant, UV radiation-resistant and flame retardance, suggesting its great potential in PDRC for thermal regulation.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Chao Wang,Min Chen,Huimin Hu,Junwei Huang,Ting Jiang,Lei Peng,Qing Shi,Qiwu Zhang
The deep treatment of monovalent thallium (Tl + ) and the study of Tl + incorporation mechanism are of great value for water safety. However, current research objectives have focused on how to oxidize or precipitate Tl + , while neglecting to investigate the underlying mechanisms of the direct immobilization and stable storage state of Tl + . Therefore, the present study examines in detail how Tl + is directly incorporated and stably stored by silicate minerals. In this study, an idea is proposed to enhance the purification of Tl-containing wastewater by using mechanically activated mica to stabilize Tl + in the silicate structure in the form of lattice residue state. Elucidation of the removal mechanism was first performed with focus on Tl + exchange with interlayer K + and H(H 2 O) + inside the silicate mineral based on the quantitative data and a series of characterizations such as XRD, XPS, FTIR, SEM-EDS and TG. As adsorbents for Tl-containing wastewater, both activated phlogopite and biotite for the purification of target wastewater demonstrated excellent performances at a dose of 2 g/L and a reaction time of 240 min, reaching quantitatively down to 23.88 μg/L and nearly 0 μg/L respectively, from an initial Tl + concentration of 1203 μg/L, so that the effluent concentrations would meet the requirements of US EPA and Chinese discharge standards for industrial wastewater and drinking water. In addition, density functional theory (DFT) calculation was used to quantify the adsorption energy of Tl + being solidified in the interlayer structure to further give insight into the mechanism of Tl + immobilization by silicate mineral.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 23
·2201271
·
IF 17.521
Yihang Gong,Wenjie Chen,Xiuxing Chen,Yizhan He,Hua Jiang,Xijian Zhang,Lijie Pan,Beibei Ni,Fan Yang,Yan Xu,Qi Zhang,Lei Zhou,Yusheng Cheng
Triple-negative breast cancer (TNBC) exhibits resistance to conventional treatments due to the presence of cancer stem cells (CSCs), causing postsurgical relapse and a dismal prognosis. Umbilical cord blood natural killer (UCB-NK) cell-based immunotherapy represents a promising strategy for cancer treatment. However, its therapeutic efficacy is greatly restrained by downregulation of the NK cell activation ligand MHC class I-related chain A/B (MICA/B) and autophagy-mediated degradation of NK cell-derived granzyme B (GZMB) in CSCs. Herein, it is demonstrated that suberoylanilide hydroxamic acid (SAHA) epigenetically downregulates let-7e-5p and miR-615-3p to increase MICA/B expression and that 3-methyl adenine (3MA) inhibits autophagy-mediated GZMB degradation, thereby sensitizing breast CSCs to UCB-NK cells. Then, an injectable hydrogel is designed to codeliver SAHA and 3MA to enhance UCB-NK cell infusion efficacy in TNBC. The hydrogel precursors can be smoothly injected into the tumor resection bed and form a stable gel in situ, allowing for a pH-sensitive sustained release of SAHA and 3MA. Moreover, UCB-NK cell infusion in combination with the hydrogel efficiently controls postsurgical relapse of TNBC. In addition, the hydrogel exhibits good hemostasis and wound-healing functions. Therefore, the work provides proof of concept that an injectable epigenetic autophagic modulatory hydrogel augments UCB-NK cell therapy to combat postsurgical relapse of TNBC.
研究领域:
肿瘤学
·
免疫治疗
·
药学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 86
·83163-83174
·
IF 3.289
Hailin Mo,Genlin Wang,Fei Liu,Pingkai Jiang
Achieving a better interface between epoxy and mica particles is the key issue to realize desirable thermal conductivity and low dielectric loss in epoxy-based dielectric materials. In this paper, we report two strategies to improve the interface between synthetic mica and epoxy resin. Polymer coated mica and organically modified mica were prepared by coating polydopamine (PDA) films and grafting a silane coupling agent (KH 560) and fluoro-chemicals via self-polymerization and in situ grafting. The thermal conductivity, dielectric loss and mechanical properties of the epoxy/functionalized mica dielectric materials were markedly improved in comparison with that of the epoxy/mica dielectric materials. The results suggests that the mechanical and dielectric properties of the epoxy/functionalized mica dielectric materials both depended on a good interface and good adhesion between mica and the epoxy matrix. The thermal conductivity of the epoxy/functionalized mica dielectric materials results from a balance of interfacial thermal resistance and quality of the interface. The better overall performance of the epoxy/mica@PDA and mica@PDA@F dielectric materials is attributed to the better interface between mica and epoxy matrix, and provided a new route for preparing epoxy-based dielectric materials with high thermal conductivity and low dielectric loss for use in electronics and the electrical industry.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）