CERAMICS INTERNATIONAL
·
2026
·
IF 6
Haonan Xue,Zihao Song,Yongguang Wang,Haiming Li,Hongyan Li,Centao Zheng,Dongqing Wei,Xiaolan Liao,Huan Li
SiO 2 aerogels have drawn significant attention for waterborne thermal-insulation coatings in buildings owing to their excellent properties: low density, high porosity, and ultra-low thermal conductivity. However, their practical use is hampered by structural collapse upon direct exposure to coating solvents, leading to a notable loss of thermal insulation performance. To overcome this challenge, we proposed a bioinspired shell-protection strategy by constructing SiO 2 aerogel@PMMA core-shell fibers via coaxial electrospinning. The PMMA shell, inspired by animal epidermis, provided size-selective permeability: it blocked liquid penetration during waterborne coating preparation while allowing steam escape during drying of SiO 2 aerogel core layer. Meanwhile, mimicking the dermis of animal skin, the entangled molecular chains in PMMA shell dynamically resisted internal gas-expansion stress during the drying, maintaining structural integrity. The resulting fibers exhibited excellent mechanical and thermal insulation performance, with respective values of 35.47 MPa and 0.043 W/m·K, respectively. Furthermore, the prepared coatings also presented exceptional mechanical and thermal insulation properties, with respective values of 13 MPa and 0.059 W/m·K. This work will provide a new and effective pathway for SiO 2 aerogels to remain stable and fully exert their thermal insulation efficacy in building coatings.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Nana Zhao,Chen Zhou,Weiqi Liu,Fukang Hao,Mengjie Han,Zhicheng Pan,Jinfeng Yuan,Mingwang Pan
Dumbbell-shaped Janus particles with asymmetric morphology, completely separated hydrophilic and lipophilic regions, and acidic/basic dual pH-responsive functional groups (DHL-ABR JPs) are in high demand because they can endow Pickering emulsions with excellent stability and flexible switching ability between emulsification and demulsification by simply changing pH value of the system. Herein, we propose a novel “oil–water interface growth” strategy to directly access 3-aminophenol- co -formaldehyde@SiO 2 (3-APF@SiO 2 ) DHL-ABR JPs with average particle size of ∼250 nm and size distribution index of 0.012. The formation mechanism was systematically investigated. Interestingly, the particle morphology could be precisely tuned from dumbbell to hamburger, and then to popcorn by simply changing the dropping time of tetraethyl orthosilicate. Additionally, the snowman-shaped particles, consisting of SiO 2 and poly (acrylic acid- co -butyl acrylate) at two ends respectively, were prepared via this method. Remarkably, the Pickering emulsion stabilized by 3-APF@SiO 2 DHL-ABR JPs showed excellent emulsification effect, i.e. the oil droplet diameter and emulsification index of the Pickering emulsion remained almost unchanged even after storage for one year and sensitive dual pH-response characteristics, i.e., emulsified at pH = 7, and demulsified at pH = 4 and 10. It is believed that this work paves a new avenue for synthesis and application of various asymmetric nanoparticles.
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Materials Today Communications
·
2025
·
IF 4.5
Ai Ping Zhang,Shang Ke Yang,De Li,Hai Lan Lin,Wei Ran Li,Peng Chen,Tong Li,Jun Bian,Dai Qiang Chen
To fabricate high-performance anti-corrosion double-layer structure polybenzoxazine (PBZ) nanocomposite coating, herein, the main-chain benzoxazine (BA-ddm) and diamine benzoxazine (Ph-hda) were first synthesized and then compounded to produce PBZ copolymer matrix (PB5). Simultaneously, NH 2 -BNNS and Epoxy-SiO 2 were obtained through the surface decoration by APTS and GPTS to the surfaces of BNNS and SiO 2 , respectively. Then, a series of nano-hybrid fillers (SiO 2 -BNNS) were prepared by hybridizing NH 2 -BNNS and Epoxy-SiO 2 at various mass ratios, and finally incorporated into the PBZ matrix to investigate the optimal hybridization ratios and the optimal addition contents of the nano-hybrid fillers. The results showed that the addition of SiO 2 -BNNS (with mass ration of 1:2) nano-hybrid filler into PBZ matrix significantly enhanced the corrosion resistance of the PBZ nanocomposite coating. When the SiO 2 -BNNS(1:2) content reached 3 wt%, the |Z| 0.01 Hz value of the PBZ nanocomposite coating reached 1.06 × 10 11 Ω·cm 2 . To further improve the comprehensive properties of the PBZ coating, a double-layer structure PBZ nanocomposite coating was fabricated through a layer-by-layer coating and layer-by-layer curing approach. The bottom layer consisted of a 3 % SiO 2 -BNNS(1:2)/PBZ coating, while the top layer was composed of a SiO 2 -BNNS(1:2) nano-hybrid particle layer. The results indicated that when the number of top SiO 2 -BNNS(1:2) layers was 4, the water contact angle (WCA) of the coating increased to 126.9°, the thermal decomposition temperature ( T d ) reached 446.8 °C, and the impedance modulus increased to 1.43 × 10 11 Ω·cm 2 . Compared with the 3 % SiO 2 -BNNS(1:2)/PBZ coating, the double-layer structure PBZ nanocomposite coating exhibited excellent hydrophobicity, thermal stability, and corrosion resistance.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Ziyuan Li,Yangjun Wang,Huan Wang,Shuai Zhang,Zhen Shang,Limei Tian,Yuying Yan
Utilizing salt-based shape-stabilized phase change materials (ss-PCMs) for high-temperature thermal energy storage stands as a pivotal avenue in realizing carbon neutrality . However, the performance of ss-PCMs significantly deteriorates after thermal cycling. This study utilizes rice husk carbon (RHC) with an in-situ SiO 2 –C interconnected structure as the encapsulating material, along with expanded graphite (EG) and MgO , to encapsulate ternary chloride (TC). In this approach, RHC simultaneously acts as a thermal conductivity materials (TCM) and a ceramic supporting material (CCM). The results showed that this encapsulation method can effectively encapsulate up to 65% of TC. The 60 wt% TC-10 wt% RHC-10 wt% EG-20 wt% MgO sample named 60T/10R/10E/20M is considered a close to optimal formulation in terms of thermal conductivity and phase change enthalpy . This ss-PCM has a thermal conductivity of 8.86 W m−1 K−1, and phase change enthalpy of 153.6 J g−1. The ss-PCMs maintained shape stability even after 1000 cycles, with minimal mass loss and thermal conductivity degradation compared to the non-RHC-added ss-PCM. This study has prepared high performance and reliability thermal storage materials through a green and low-cost approach.
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Polymers
·
2023
·Vol. 15
·期 6
·1579
·
IF 5
Deling Li,Congcong Luo,Jun Zhou,Liming Dong,Ying Chen,Guangtian Liu,Shuyun Qiao
Corn starch was plasticized by glycerol suspension in a twin-screw extruder, in which the glycerol suspension was the pre-dispersion mixture of glycerol with nano-SiO2. Polylactide (PLA)/thermoplastic starch/SiO2composites were obtained through melt-blending of PLA with thermoplastic starch/SiO2in a twin-screw extruder. The nonisothermal crystallization behavior of PLA in the composites was investigated by differential scanning calorimetry. An interface of PLA with thermoplastic starch was proven to exist in the composites, and its interfacial bonding characteristics were analyzed. The interfacial binding energy stemming from PLA with thermoplastic starch exerts a significant influence on the segmental mobility of PLA at the interface. The segmental mobility of PLA is gradually improved by increasing interfacial binding energy, and consequently, the relative crystallinity on the interface exhibits progressive promotion. The Jeziorny model could well describe the primary crystallization of PLA in the composites. The extracted Avrami exponents based on the Jeziorny model indicate that the primary crystallization of PLA follows heterogeneous nucleation and three-dimensional growth. This study has revealed the intrinsic effect of the interfacial segmental mobility on the nonisothermal crystallization behavior of PLA in composites, which is of technological significance for its blow molding.Keywords:polylactide;composites;interfacial binding energy;nonisothermal crystallization kinetics
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Journal of Water Process Engineering
·
2023
·
IF 7
Shuangli Li,Yu Zhang,Sen Qiao,Jiti Zhou
Although MIL-101(Fe) has a homogeneous distribution of active metal sites, the relatively low stability of its coordination bonds limits its potential for application, especially in harsh environments. Here, a novel lanthanum-doped MIL-101(Fe)-NH 2 @mesoporous SiO 2 yolk-shell (LMFN-YS) material, synthesized by green water-etching, has effectively improved the adsorption capacity and stability of MIL-101(Fe)-NH 2 . Compared to traditional acid-base etching methods, water etching offered a more co-friendly and cost-effective approach to producing yolk-shell structures. Due to the mesoporous protective shell of mesoporous SiO 2 and more exposed active sites, the yolk-shell materials showed a faster adsorption rate (30 min) and a larger uptake capacity (240.0 mg P/g) than those of MIL-101. The material also exhibited broad range of pH stability from 2 to 10 and displayed good cyclic regeneration ability, with a removal efficiency of 75.9 % after three cycles. Additionally, it demonstrated excellent selectivity towards various coexisting anions such as Cl − , NO 3 − , SO 4 2− , CO 3 2− and HCO 3 − at diverse ionic strengths ranging from 0.001 to 1 M. The superior performance of L 1 MFN-YS (yolk-shell materials of La: Fe = 1:1) was attributed to a combination of factors, including ligand exchange between La(Fe)-OH and phosphates, Lewis acid-base interaction and electrostatic attraction. Additionally, high phosphate removal performance was observed in the real petrochemical wastewater (initial concentrations of 5.48 mg P/g) with a residual effluent concentration of 0.05 mg P/L, which was below the A-level standard of phosphate effluent in China (0.5 mg/L). This work provides a green method for preparing yolk-shell materials with improved ability to treat phosphate wastewater.
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ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Deming Zhao,Yiting Liu,Chunxin Wu
The research on developing a purification technology for Cr(Ⅵ) polluted water with high efficiency and the low energy consumption is crucial for achieving several Sustainable Development Goals (SDGs). In order to achieve these goals, Fe 3 O 4 @SiO 2 -APTMS nanocomposites were prepared by Fe 3 O 4 nanoparticles modified with silica and 3-aminopropyltrimethoxysilane in the presence of ultrasonic irradiation. The nanocomposites were characterized by TEM, FT-IR, VSM, TGA, BET, XRD, XPS and these analytic results proved that the nanocomposites were successfully prepared. The influential factors of Fe 3 O 4 @SiO 2 -APTMS on Cr(Ⅵ) adsorption have been explored and better experimental conditions have been obtained. The adsorption isotherm conformed to the Freundlich model. Pseudo-second-order kinetic model provided a better correlation for the experimental data compared to other kinetic models. Thermodynamic parameters for adsorption indicated that the adsorption of Cr(Ⅵ) was a spontaneous process. It was speculated that the adsorption mechanism of this adsorbent includes redox, electrostatic adsorption and physical adsorption. In summary, the Fe 3 O 4 @SiO 2 -APTMS nanocomposites were of great significance to human health and the remediation of heavy ion pollution, contributing to achievement of the Sustainable Development Goals (SDGs), including SDG-3, SDG-6.
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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Honglin Qin,Yuan Tao,Ruiting Niu,Bingyan Han,Lizhen Qiao
In this work, magnetic flower-like and fluorine-doped nickel oxide composites Fe 3 O 4 @SiO 2 @F/NiO were prepared and applied for the magnetic solid-phase extraction (MSPE) of five imidazole fungicides. The obtained materials were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller analysis to verify the successful synthesis. The effect of some experimental parameters on the extraction efficiency were explored to optimize the MSPE conditions, including the adsorbent dosage, ultrasonic time, salt concentration, sample solution pH, elution solvent type and volume. Then, method validation was performed under the optimal conditions in combination with high-performance liquid chromatography-ultraviolet detection. The determination coefficients ranged from 0.9956 to 0.9991, and the limits of detection and limits of quantification for the imidazole fungicides were 0.1–3 μg·L −1 and 0.3–10 μg·L −1 , respectively. Moreover, the intra-day and inter-day precisions were evaluated in three different concentrations with relative standard deviations in the range of 1.34 %-13.31 % and 4.96 %-13.92 %. At last, the proposed MSPE method was used to enrich and determine imidazole fungicides in tap water, milk and green tea samples, and the spiked recoveries were in the range of 77.93 %-119.38 %, demonstrating the potential of the method in the determination of imidazole fungicides from real samples.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 47
·期 2
·828-837
·
IF 3.925
Tiantian Wan,Zulei Zhang,Hailong Wang,Yiwen Yang,Hanxing Yang,Jian Zhang,Yanbo Zeng,Lei Li,Jinchun Li
Chlorogenic acid (CGA), a cis-diol-containing compound, exhibits anti-inflammatory, antiviral, antimicrobial and anti-oxidation properties. Thus, selective determination of CGA in food products is extremely necessary. In this study, a boron affinity magnetic polymer named Fe3O4@SiO2@PIL was synthesized to detect the concentration of CGA in actual fruit samples. The Fe3O4@SiO2@PIL was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermogravimetric (TG) analysis. The results showed that the Fe3O4@SiO2@PIL has uniform morphology, good magnetic properties, suitable structure and high stability. The experimental assays showed that the Fe3O4@SiO2@PIL can detect the concentration of CGA within 7 min, and has a good linear relationship with CGA in the concentration range of 0.025–2 μM (R2 = 0.9989) with a detection limit of 10 nM (S/N = 3). Moreover, the Fe3O4@SiO2@PIL exhibited excellent selectivity and can be reused for at least 5 runs, indicating its good stability and reusability. Finally, the Fe3O4@SiO2@PIL was used to selectively separate CGA in real fruit samples with the recovery ranging from 93.4% to 103.0% and the relative standard deviation (RSD) between 0.7% and 5.1%. This study gives a new insight into the utilization of magnetic materials by grafting boric acid functionalized ionic liquids for specific and rapid detection of natural cis-diol-containing compounds.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 4
·697-704
·
IF 3.1
Meng Chenchen,Huang Min,Li Yunchao
Covellite copper sulfide nanocrystals(CuS NCs) are typical p-type semiconductors, showing strong optical absorption in the near-infrared(NIR) region thanks to their notable localized surface plasmon resonance(LSPR) properties. However, their LSPR properties and compositions are both highly susceptible to the external environment, which severely limits their practical applications. Until now, it remains a technical challenge to improve the structural and optical stability without sacrificing the LSPR performance of CuS NCs. Herein, to solve such a challenge, CuS@SiO 2 NPs with various silica shell thicknesses(CSNs- X nm) were synthesized in a well-controlled fashion via optimizing reverse microemulsion coating protocol. Compared with the pristine CuS NCs, the as-prepared CuS@SiO 2 NPs exhibited comparable LSPR properties but much higher photostability, enabling resistance to various harsh environments( e.g. , high-power irradiation, strong reduction, and oxidation environment). Impressively, when used in solar-driven interfacial water evaporation, all the CuS@SiO 2 NPs exhibited excellent water evaporation performance with efficiencies beyond 70%(as high as 75.2% for CSN-23 nm) after 20 continuous testing cycles. Evidently, this paper is greatly helpful in better designing and fabricating high-performance plasmonic materials for practical photoelectrical, photothermal, and photocatalytic applications.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Lihua Peng,Ziqing Xu,Luomeng Chao,Dapeng Zheng,Haibin Yang,Changwei Sun,Hongzhi Cui
Transparent heat-insulation glass (HIG) with a highly selective light-absorbing coating and an energy-storage blanket (ESB) loaded with phase change materials show considerable potential in reducing building energy consumption. However, the energy-saving effect of a single material is usually not ideal, and the instability of HIG and ESB limits their applications. In this work, HIG with enhanced stability and a form-stable ESB was prepared. The temperature difference between various indoor areas and energy consumption were reduced simultaneously because of the temperature regulation function of the HIG and ESB in the light and dark areas. Na x WO 3 @SiO 2 -coated HIG showed excellent daylighting and near-infrared-light-shielding ability with visible light transmittance of 71% and near-infrared light transmittance of 16%, respectively. Moreover, polyethylene glycol/halloysite nanotube composite phase change material with a high enthalpy of 71.1 J/g and a suitable phase change temperature of 27.5 °C was prepared for the form-stable ESB. The test room experiment indicated that the combination of the HIG and ESB (HIG–ESB) reduced the indoor temperature difference from 6.8 °C to 0.9 °C and the maximum temperature by 33–40%. The energy consumption simulation revealed that the ESB can save energy in all selected cities, whereas HIG is only applicable to cities in warm regions. HIG–ESB achieved the highest annual energy-saving rate of 43.9% in Hong Kong. The joint application of the HIG and ESB provides a new strategy for developing passive energy-saving buildings.
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Nanomaterials
·
2022
·Vol. 12
·期 17
·2921
·
IF 5.719
Yu Tian,Zhigang Xu,Zhimin Liu,Xiaoxi Si,Fengmei Zhang,Wei Jiang
In the present study, silica-coated magnetic nanoparticles functionalized with vancomycin (Fe3O4@SiO2@VAN) were synthesized. The Fe3O4@SiO2@VAN nanocomposite was used as a sorbent for the magnetic solid-phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) from environmental water, followed by GC-MS. The nanocomposite was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and nitrogen sorption. Various experimental parameters were optimized, including extraction condition and desorption condition. Results show that Fe3O4@SiO2@VAN combined the advantages of nanomaterials and magnetic separation technology, showing excellent dispersibility and high selectivity for PAHs in environmental water sample. Under the optimal extraction conditions, an analytical method was established with the sensitive limit of detection (LOD) of 0.03–0.16 μg L−1. The method was successfully applied for the analysis of environmental water samples. The relative standard deviations (%) were in the range of 0.50–12.82%, and the extraction recovery (%) was in the range of 82.48% and 116.32%. MSPE-coupled gas chromatography–mass spectrometry quantification of PAHs is an accurate and repeatable method for the monitoring of PAH accumulation in environmental water samples. It also provides an effective strategy for the tracing and quantification of other environmental pollutants in complex samples.Keywords:magnetic solid-phase extraction;polycyclic aromatic hydrocarbons;vancomycin;GC-MS
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危险品化学品经营许可证（带存储）