JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 45
·48204
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IF 2.188
Hao Sun,Yijun Liu,Dan Li,Bing Liu,Jie Yao
Thin film composite (TFC) membrane can get rid of small molecular contaminants and salts with a very high efficiency, thus exhibiting promising potential for addressing the emerging problem of a clean water shortage. In this work, a new type of TFC membrane was prepared by interfacial polymerization of two monomers (MPD and TMC) on surface of SiO 2 /polyvinylidene fluoride (PVDF) substrate. The maximum flux of 3.16 L m −2 h −1 Bar −1 was achieved for the optimized hydrophobic SiO 2 nanoparticles well dispersed in PVDF substrate, which is 2.6 times higher than that of 1.21 L m −2 h −1 Bar −1 for the commercial cellulose triacetate reverse osmosis membrane. The improved performance of TFC membrane could be attributed to the higher compaction resistance of SiO 2 /PVDF substrate. Further analysis revealed that PVDF crystal phase inversion induced by superhydrophobic SiO 2 nanoparticles obviously enhanced the intramolecular and intermolecular hydrogen bonds between PVDF polymer molecules. Additionally, the narrower finger-like pore size and thicker pore wall of SiO 2 /PVDF substrate also played significant roles in enhancing the compaction resistance of PVDF membrane. This work also provides a proof-of-concept demonstration of high permeability substrates for effective flux enhancement of TFC membranes. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48204.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yi Qin,Shudong Zhang,Shuai Han,Tingting Xu,Cui Liu,Min Xi,Xinling Yu,Nian Li,Zhenyang Wang
Cycloaliphatic epoxy (CE) resin plays a vital role in insulation equipment due to its excellent insulation and processability. However, the insufficient ability of CE to confine electrons under high voltage often leads to an electric breakdown, which limits its wide applications in high-voltage insulation equipment. In this work, the interface effect of inorganic nano-SiO2 introduces deep traps to capture electrons, which is synergistic with the inherent ability of the voltage stabilizer m-aminobenzoic acid (m-ABA) to capture high-energy electrons through collision. Therefore, the insulation failure rate is reduced owing to doping of the functionalized nanoparticles of the m-ABA-grafted nano-SiO2 (m-ABA-SiO2) into the CE. It is worth noting that the breakdown field strength of this m-ABA-SiO2/CE reaches 53 kV/mm, which is 40.8% higher than that of pure CE. In addition, the tensile strength and volume resistivity of m-ABA-SiO2/CE are increased by 29.1 and 140%, respectively. Meanwhile, the glass transition temperature was increased by about 25 °C and reached 213 °C. This work proves that the comprehensive performance of CE-based nanocomposites is effectively improved by m-ABA-SiO2 nanoparticles, showing great application potential in high-voltage insulated power equipment.
研究领域:
材料科学
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电气工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Maosai Zhang,Ye Yang,Wenchuan Guo
In this work, a simple electrochemical sensing platform based on acid-treated Fe 3 O 4 @SiO 2 nanoparticles was successfully prepared for nitrite and sulfite detection. Fe 3 O 4 @SiO 2 nanoparticles were synthesized through the sol–gel and hydrothermal methods. Fe 3 O 4 @SiO 2 presented positive charges after acid treatment, which could enhance the electrostatic attraction between Fe 3 O 4 @SiO 2 and nitrite and sulfite. The Fe 3 O 4 @SiO 2 (acid-treated) modified magnetic glassy carbon electrode (MGCE) was applied to detect nitrite and sulfite using differential pulse voltammetry and cyclic voltammetry. Under optimized conditions, the developed electrochemical sensor presented good analytical properties for nitrite and sulfite detection with detection limits of 3.33 μmol/L and 31.57 μmol/L, respectively. The good recoveries varied from 85.18% to 111.02%, with a relative standard deviation of 0.23–4.80%. Furthermore, the Fe 3 O 4 @SiO 2 (acid-treated) modified MGCE showed better selectivity, reproducibility, and repeatability in nitrite and sulfite detection. Therefore, this proposed electrochemical sensor provides a new method for developing a nitrite and sulfite detection sensor.
研究领域:
食品科学
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分析化学
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DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 24
·7970
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IF 4.6
Gang Deng,Lu Yao,Mingzhao Chen,Yuanyuan Yang,Song Lu,Guohua Wu
With the improvement in people’s living standards, the development and application of smart textiles are receiving increasing attention. In this study, a carbon nanosurface was successfully coated with a SiO2layer to form C@SiO2nanomaterials, which improved the dispersion of carbon nanomaterials in an aqueous solution and enhanced the absorption of light by the carbon nanoparticles. C@SiO2nanoparticles were coupled on the surface of silk fabric with the silane coupling agent KH570 to form C@SiO2nanosilk fabric. The silk fabric that was subjected to such surface modification was endowed with a special photothermal function. The results obtained with scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), and infrared spectroscopy (FTIR) showed that C@SiO2nanoparticles were successfully modified on the surface of the silk fabric. In addition, under the irradiation of near-infrared light with a power of 20 W and a wavelength of 808 nm, the C@SiO2nanosilk fabric experienced rapid warming from 23 °C to 60 °C within 30 s. After subjecting the functional fabric to hundreds of photothermal experiments and multiple washes, the photothermal efficiency remained largely unchanged and proved to be durable and stable. In addition, the thermogravimetric (TG) analysis results showed that the C@SiO2nanoparticles contributed to the thermal stability of the silk fabric. The UV transmittance results indicated that C@SiO2nanofabric is UV-resistant. The silk modification method developed in this study is low-cost, efficient, and environmentally friendly. It has some prospects for future applications in the textile industry.
研究领域:
材料科学
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纺织工程
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纳米技术
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DOI
PubMed
高影响因子
ENERGY & FUELS
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2021
·
IF 3.605
Jing Wang,Yv Chen,Shun Wang,Huiqing Liu,Fengming Zhao
Foam stability is significantly important for enhancing oil recovery and sequestration of carbon dioxide underground. Nanoparticles have been widely used to improve foam stability, but traditional experiments cannot well reveal the mechanisms of nanoparticles on stabilizing foams and the interactions among nanoparticles, surfactants, and liquid films. In order to clarify the mechanisms of enhancing foam stability by nanoparticles, the adsorption behaviors of nanoparticles with different modification degrees on the liquid film and the effects of different compounded systems of nanoparticles and surfactants on the foam stability were studied by molecular simulation. Moreover, the foam stability of the compounded systems was evaluated by experiments. The results show that the foam stability of single nanoparticles increases first and then decreases with the increase of hydrophobic properties. The electrically charged properties of nanoparticles can significantly affect the foam stability of the compound system with nanoparticles and surfactants. The electrostatic repulsion between hydrophilic nanoparticles and anionic surfactants results in irregular arrangement of surfactants in the liquid film, which reduces foam stability. On the contrary, the electrostatic attraction between cationic surfactants and hydrophilic nanoparticles can promote the orderly arrangement of cationic surfactants and thus enhance the foam stability. Amphiphilic nanoparticles can interact with anionic or cationic surfactants, which not only strengthens the regular arrangement of surfactants on the interface but also fills the interface cavity and improves the foam stability. In addition, the experimental results show that there is an optimal ratio between nanoparticles and surfactants. Nanoparticles can reduce the foaming volume to a certain extent, but appropriate nanoparticles can effectively prolong the foam half-life. This study elucidates the mechanism of the nanoparticles/surfactant system in enhancing foam stability and provides an important theoretical basis and guidance for nanoparticle modification and optimization of foam flooding.
研究领域:
石油工程
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化学工程
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纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
·
IF 6.953
Jumin Hou,Xiaoxia Yan
The ultrasonic treatment could decrease the particles size of chitosan-SiO 2 particles. The EDS of samples with ultrasonic treatment for 0 min and 10 min indicated that the SiO 2 was present in prepared chitosan-SiO 2 particles. When the ultrasonic time reached 10 min, the chitosan-SiO 2 nanoparticles formed and the mean size was 506.7 ± 3.42 nm and the Zeta potential of the chitosan-SiO 2 nanoparticles was greater than 30 mV, showing the suspension was a stable dispersed liquid. The chitosan-SiO 2 nanoparticles were used as reinforcement in thermoplastic starch films to further verify their performance in enhanced films. The water contact angle of thermoplastic starch film reinforced with chitosan-SiO 2 nanoparticles was 44.13 ± 5.02° and had a good mechanical property with tensile strength of 8.91 ± 0.49 MPa. This study indicates that chitosan-SiO 2 nanoparticles could be used as a reinforcement to prepare thermoplastic starch films and promote the application of chitosan nanoparticles in nanocomposite films.
研究领域:
材料科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2019
·
IF 2.943
Weibin Jiang,Xiongfei Jin,Huan Li,Shiyu Zhang,Tao Zhou,Huasheng Xie
Silicone-acrylic resin (SAR) was prepared from acrylic monomers and silicone prepolymer by the free radical solution polymerization , and then mixed TiO 2 and SiO 2 nanoparticles modified by KH570 were added to prepare nanocomposite coating . Thermogravimetric analysis and contact angle measurements showed that the acrylic resin modified by silicone prepolymer exhibited an improved thermostability and a better hydrophobicity compared with the unmodified sample. The adding of nanoparticles further increased the hydrophobicity. The contact angle of modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% is the highest, 108.4°. The UV resistance and weather resistance of the modified silicone-acrylic resin are significantly improved. It was also found through electrochemical impedance spectroscopy that the corrosion resistance was significantly improved by the addition of mixed TiO 2 and SiO 2 nanoparticles. Modified silicone-acrylic resin with mixed TiO 2 and SiO 2 nanoparticles of 3 wt% and 5 wt% coating system maintains an excellent anticorrosion performance (coating resistance R c of more than 10 9 Ω cm 2 ) even at 3.5% NaCl electrolyte medium till to 1800 h.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
·
IF 8.9
Tao Yu,Jianjun Xu,Jianjun Chen,Jianxin Liu,Yanzi Gao
The application of polymer dispersed liquid crystal (PDLC) film has been significantly hindered due to its unsatisfactory contrast ratio ( CR ) in high-temperature environments, delayed response speed in low-temperature conditions, and suboptimal off-axis viewing angles. To address these issues, nano-particle SiO 2 with a similar refractive index to polymer was introduced into the film, and then the electro-optical properties and viewing angle characteristics of PDLC films with different contents of SiO 2 at 100 °C and −30 °C were analyzed. When the doping amount of SiO 2 is 1.5 wt% of the polymer component, the contrast ratio of PDLC films at 100 °C is increased to 16, which is 60 % higher than that of undoped SiO 2 films. At −30 °C, the saturation voltage is 59 V (2.95 V/μm), and the rise time and decay time are 0.35 s and 2.5 s, respectively, slightly higher than the film without doping SiO 2 . The film also maintained a good viewing angle, with H on < 15 % at 45° and T on > 60 % at 60°. Balancing the film’s viewing angle and working temperature is anticipated to enhance its applicability for outdoor smart windows.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jie Min,Wei Song,Tianding Hu,Yunfei Zhi,Zhenhao Xia,Tiecheng Zhang,Shaoyun Shan,Hongying Su
Magnetic nanoparticle-supported heterogeneous catalysts have been widely researched in green catalysis, due to their convenient magnetic separation and nanometer effects. Herein, a magnetic Co(III)-Salen heterogeneous catalyst with uniform spherical core-shell structure was synthesized for the chemical fixation of CO 2 into cyclic carbonate based on the sustainable protocol development and green chemistry principles. Fe 3 O 4 @SiO 2 nanoparticles with uniform spherical core-shell structure were prepared by the reverse microemulsion method, and Co(III)-Salen complexes were subsequently immobilized on the resulted Fe 3 O 4 @SiO 2 nanoparticles via covalent bonding, leading to Fe 3 O 4 @SiO 2 @Co(III)-Salen nanocomposites with particle size of 29 nm and saturation magnetization value of 27.2 emu/g. The catalytic performance study indicated that the catalyst exhibited high yield of 99% with selectivity of 100% for the ring-opening addition reaction of CO 2 and epoxide under solvent-free reaction condition. A plausible reaction mechanism was proposed that the Lewis acidic sites of Co(III)-Salen and nucleophilic bromine ion components played synergetic roles in promoting cycloaddition reactions. A stable geometry of the Co(III)-Salen complex and a detailed evidence for the reaction mechanism were provided by the density functional theory (DFT) calculations. Based on their excellent magnetic properties , the Co(III)-Salen nanocomposites could be easily recovered by using an external magnet and reused for 5 times without significant leaching of metal center and loss of catalytic activity.
研究领域:
材料科学
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绿色化学
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催化反应
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Qian Zhang,Zhiwei Guo,Yujie Yang,Yanxiang Li,Chuanfang Yang,Wangliang Li
Surfactants in ultra-low sulfur diesel (ULSD) can improve the stability of the emulsified water droplet by forming a thin film at the water-fuel interface. Emulsified water droplets block the oil spray nozzle and break down the engine, which need to be removed. For colliding emulsified water droplets, surfactant film with high viscoelastic modulus provides an obstacle to their coalescence. Micro/nanosized-SiO 2 particles were added into ULSD to interrupt the arrangement of the surfactant film. After adding with 20 nm SiO 2 , the interfacial tension of water-monoolein-ULSD increased from 16.0 mN/m to 21.4 mN/m, and its viscoelastic modulus decreased from 17.1 mN/m to 10.9 mN/m, a decrease of 36.3%. It proved that the addition of nanosized SiO 2 into water-monoolein-ULSD system increased the interfacial tension and reduced the viscoelastic modulus of the monoolein film. However, after adding nanosized SiO 2 , the viscoelastic modulus of the water-PETO-B-ULSD layer had no significant changes. Therefore, we concluded that 20 nm SiO 2 disturbed the dense packing of monoolein as its adsorption to surfactants and the electrostatic repulsion force between them and the hydrophobic group, resulting in a decrease in elastic modulus . However, PETO-B had a complex branched structure leading to a loose packing, which had unoccupied adsorption sites and barely affected by the intrusion of 20 nm SiO 2 . Therefore, this research provided a strategy to add nanosized-SiO 2 into W/O emulsions containing monoolein-like surfactant to reduce its stability.
研究领域:
化学工程
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材料科学
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表面科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 20
·9905-9912
·
IF 3.3
Jun Tian,Yi Pang,Hongjuan Gu,Dongyan Tang,Zaiqian Yu
Nanoscale molecularly imprinted polymers (MIPs) could offer high binding capacity and fast mass transfer, but their removal after adsorption is costly and time-consuming. In this paper, Fe3O4@SiO2 nanoparticles were synthesized and a lysozyme-imprinted polymer was synthesized via surface initiated atom transfer polymerization on the surface of Fe3O4@SiO2. Temperature-controlled adsorption and desorption of lysozyme were measured, and the adsorption kinetics and isothermal adsorption were determined. The results indicate that the synthesized Fe3O4 has an inverse spinel crystalline structure and Fe3O4@SiO2 is a core–shell structured nanoparticle. The adsorption kinetics followed the Langmuir EXT1 model, and the equilibrium adsorption capacity of the Fe3O4@SiO2@MIP at 40 °C was 117.12 mg g−1 with an imprinting factor of 1.51. SDS-PAGE electrophoresis confirmed the specific adsorption of lysozyme, and 86% of the adsorbed lysozyme could be released by changing the temperature.
研究领域:
生物化学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Ying Huang,Hualong Huang,Yinghao Guo,Yulin Ding,Yifan Zhou,Hang Yu,Yinghao Liu,Wenmu Li
The poor inherent water resistance and electrical performance of paper-based electrodes restrict their applications in electronic products. Organic–inorganic nanocomposites, which can integrate the merits of various materials, are the best way to compensate for these shortcomings. In this study, a facile strategy was developed to fabricate a superhydrophobic tissue/MXene/TPU/SiO2 paper-based composite for multidimensional bionic surface and wearable strain sensor applications. Inspired by taro leaves, superhydrophobic surfaces consisting of TPU/SiO2 micronanospheres were prepared by electrospinning. High strain-sensing performance is achieved by the microcrack extension mechanism of the tissue/MXene electrode. The integrity of the tissue/MXene/TPU/SiO2 paper-based composites was enhanced by systematically optimizing the multilayered assembly processes and technologies. Our composite paper demonstrated high mechanical strength and highly effective antibacterial and self-cleaning properties (water contact angle, WCA = 157°), which could not only inhibit the adhesion of Escherichia coli and Staphylococcus aureus but also repel solid contaminants upon washing with water. The paper-based wearable strain sensor displayed a very high sensitivity (gauge factor, GF = 580) over a broad strain range (bending angle from 0 to 160°) and a fast response time (53 ms). Our e-skin sensor array can effectively capture the wrist motions of table tennis players. Moreover, this sensor also showed a very high breathability (56.5 g·m–2·h–1) for comfort of wear. Notably, our paper-based sensors can be disposed of by burning, which can mitigate potential electronic waste pollution. Our strategy for fabricating paper-based sensors with superhydrophobicity, breathability, and antimicrobial properties could potentially provide promising prospects for future flexible electronics.
研究领域:
材料科学
·
柔性电子
·
生物医学工程
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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）