NEW JOURNAL OF CHEMISTRY
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2025
·Vol. 49
·期 7
·2962-2972
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IF 2.5
Jiahe Li,Fang Du,Changsheng Tang,Luyang Wang,Yulin Yang,Debin Xia,Jian Zhang,Bowen Tao,Ping Wang,Kaifeng Lin
Al–Li alloys are considered promising materials in solid propellants owing to their higher combustion efficiency than Al particles, which exhibit incomplete combustion. However, Al–Li alloy particles cannot be directly applied in propellant systems owing to their poor compatibility. Thus, in this work, an in situ polymerized film was formed via the pretreatment of Al–Li alloy followed by polymerization with trifluoroethyl methacrylate (TFEMA) and N,N′-methylene-bis-acrylamide (MBA). The hydrothermal stability of the coated samples was improved with a mass variation rate of 5.82% on treatment with TFEMA (30%) and MBA (10%), corresponding to 116.62% of Al–Li at 60 °C and 75% humidity for 30 days. Besides, the thermostability increased based on the 19° backward skewing of the high temperature exothermic peak. Meanwhile, there were no pores and cracks in the HTPB propellant, which proved the possibility of its practical application with the compatibility of level 1 with HTPB in solid rocket motors. In addition, the Al–Li propellant exhibited a better combustion performance of 0.53 s and 1309.33 °C than the Q3 Al propellant, with 1.34 s ignition delay time and 990.24 °C burning temperature. The combustion efficiency was also improved based on the observation of combustion phenomena and residue size. Besides, the combustion mechanism was analyzed based on the characteristics of Al–Li with the micro-explosion effect. Therefore, Al–Li alloy has the potential to be used as a new generation solid propellant.
研究领域:
材料科学
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推进剂技术
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Jiahe Li,Fang Du,Changsheng Tang,Luyang Wang,Yulin Yang,Debin Xia,Jian Zhang,Bowen Tao,Ping Wang,Kaifeng Lin
Solid propellant containing Al-Li particles has attracted much attention because of the high combustion efficiency and effective absorption of HCl in burning tail smoke. However, the highly reactive Li has limited the application due to the lower stability and compatibility with HTPB. In this study, the chemically stable Al-5Li particles were fabricated by a thin organic layer, which was used by the dodecyltrimethoxysilane (DTMS) or 1H,1H,2H,2H-perfluorooctyltrimethoxysilane (FTMS) with the site-selective coating of active Al and Li. Meanwhile, the Li-F coordination bond also provides a deeper protection with the decrease of hygroscopicity with 39.08 % mass variation through the XPS test of Al-5Li@FTMS. The Al-5Li@FTMS and Al-5Li@DTMS particles had good stability and compatibility with HTPB to 1 or 2 degree and none pores or cracks on the cross section of propellant. Note here that the Al-5Li@FTMS and Al-5Li@DTMS propellants exhibited a shorter ignition delay time, higher peak flame temperature and smaller particle size of residue corresponded to Al propellant. Meanwhile, the burning rates of propellants had increased by 2.80 % and 0.93 %. Thus, the coating of FTMS is better than that of DTMS from the stability and combustibility. The micro-explosion characteristic of Al-5Li particles would provide higher combustion efficiency and performance. The feasible fabrication method would provide an relevant guidance for the stability and combustibility of alloy powders in solid propellant.
研究领域:
材料科学
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燃烧学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Mingkun Yang,Ying-xia Liu,Donglin Zhang,Chenrui Cao,Xiuchen Zhao,Yongjun Huo
With fast developments in the environmental-friendly industry, electrically conductive adhesive (ECA) composites with high electrical conductivity, mechanical strength, and electrochemical migration resistance as well as low cost are highly desirable for emerging power electronics applications. In this study, a category of ECAs, namely, size-controllable sonochemical low-melting-point-alloy (LMPA) particle-incorporated transient liquid-phase ECAs (TLP-ECAs), with excellent electrical conductivity, considerable mechanical strength, and high electrochemical migration resistance has been successfully demonstrated. Experimental results showed that the bulk resistivity of TLP-ECA decreased to a minimum value of 2.37 × 10–4 Ω-cm with the remaining filler content at a low level (the total content of metallic fillers, i.e., 70 wt % in TLP-ECAs), while the mechanical shear strength increased considerably (by 55.4%) compared with pure silver ECA with the same filler content, demonstrating that addition of sonochemical LMPA particles into ECA can simultaneously and considerably improve the electrical and mechanical properties. Moreover, the diffusional reaction mechanism of sonochemical LMPA particle-filled TLP-ECA was systematically investigated via differential scanning calorimetry (DSC), X-ray diffraction (XRD), and high-resolution scanning transmission electron microscopy in high-resolution high-angle annular dark-field mode (STEM-HAADF). The mechanism of the diffusion reaction of TLP-ECA with LMPA particles was rationalized, where Ag9In4 (γ phase, cP52, and P43m) and Ag3Sn (ε phase, oP8, and Pmmm) intermetallic compounds (IMC) and their corresponding nanostructures were responsible for the substantial enhancement in mechanical strength and the antielectrochemical migration property. The sonochemical method is the key to synthesize LMPA particles of desirable compositions and controllable size, thereby enhancing the overall performance of Ag-based TLP-ECAs. Accordingly, the sonochemical LMPA particle-incorporated-TLP-ECAs are the promising interconnection material candidates for power electronics packaging.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jingjing Wang,Yi Xu,Muhammad Zareef,Quansheng Chen,Waqas Ahmad
The study reports a fast and simple electrochemical fabrication route to pivot towards improved and reproducible surface-enhanced Raman scattering (SERS) signal. The generated star-shaped 3D nanogold particles were administered for multiple analytes detection in red wine and chili sauce. The SERS substrate was programmed via regulating voltage, deposition time, and electrolyte stirring conditions for signal stability. The relative standard deviation (RSD) was systematically studied on nine points, uniformly distributed on the SERS substrate, with 49 spectra collected from each point. The resultant overall RSD was found to be less than 9 % (stirring) with a SERS enhancement factor of 1.30 × 10 8 . The optimized SERS substrate was capable of detecting rhodamine 6G, 4-aminothiophenol and 4-nitrothiophenol at concentrations as low as 1.0 × 10 −7 mol L −1 . The star-shaped 3D nanogold particles were used to detect rhodamine B in chili sauce and red wine samples with high recovery rates and detection limit of 6.0 × 10 −8 mol L −1 .
研究领域:
材料科学
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分析化学
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食品安全
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
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IF 7.1
Jia Tang,Yuxin Xing,Zhenqiang Wang,Mengnan Yang,Jixi Zhang,Kaiyong Cai
The design and interfacial engineering of DNA functionalized nanosensors with spatially separated but functionally integrated detection units holds a great promise in optical biosensors. In this study, we developed a bi-component hybrid of Janus nanoquencher particles with immobilized enzymes for fluorescence-based “off-on” detection in solution. Specifically, the hybrids consisting of a mesoporous polydopamine nanoparticle (MPDA) side (∼200 nm) asymmetrically attached with a gold (Au) particle side (∼30 nm) were generated through electrostatic repulsion-controlled growth. By regioselective binding and modification of the exposed side of the particles, fluorescent DNA probes and duplex-specific nuclease (DSN)/T7 exonuclease (T7) were subcompartmentalized on the MPDA and Au side, respectively, to realize substrate recognition and target recycling via the formation and hydrolysis of DNA hybrids. By using microRNAs (miRNAs) as a model target, the developed nanosensor realized a sensitive detection with a low limit of 32 fM (in a linear range from 20 fM–500 fM). Additionally, a high selectivity capable of discriminating a single-base mismatch, as well as a long-term detection stability were realized by the asymmetric interface designs and enzyme immobilization. The methodology is promising in the design and development of DNA probe-loaded hybrid nanosensors.
研究领域:
生物传感器
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纳米技术
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分子生物学
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分析化学
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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）