FUEL
·
2024
·
IF 6.7
Chunlong Jiang,Haobo Bi,Qizhao Lin,Zhanshi Ni
Aluminum is a widely used high-energy material. However, under environmental conditions, it is easy to form a layer of oxide cap on the surface of aluminum particles, which hinders the combustion of aluminum powder. In this paper, different oxides (MgO, SiO 2 , Fe 2 O 3 and CuO) were added to aluminum powder to study the influence of different additives on the combustion process of nano aluminum (nAl). It is found that four additives can improve the combustion rate of nAl in high temperature environment, especially Fe 2 O 3 and CuO. The molecular structure, element distribution and micro morphology of the combustion products were analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). In addition, combined with the thermogravimetric experiment, it is found that under the temperature programmed condition, the influence of four oxides on the combustion process of nAl was not obvious.
研究领域:
材料科学
·
燃烧化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chuan Huang,Zhijian Yang,Yanchun Li,Baohui Zheng,Qilong Yan,Lifeng Guan,Guan Luo,Shangbin Li,Fude Nie
Nano-aluminum, as a potential replacement of micro-aluminum, has attracted significant research interests in energetic fields due to its high reactivity. However, the intrinsic high surface area of nanoparticles drives nano-aluminum encounter challenges in handling process and prone to large aggregation, significantly impeding the further application of nano-aluminum. In this work, nano-aluminum based microspheres incorporating hexanitrohexaazaisowurtzitane (CL-20) are directly fabricated by electrospray deposition. These as-prepared microspheres were in high monodispersity and their size ranges from 8 to 16 μm. The surface morphology of such microspheres was adjustable by using different polymers as binder. Thermal behavior results show that CL-20 has no appreciable effect on the reactivity of nano-aluminum while the fluoropolymer binder (F2314) facilitates the oxidation of nano-aluminum. Nevertheless, the presence of CL-20 can significantly enhance the reactivity of nano-aluminum in the combustion behavior tests, where electrosprayed microspheres exhibit outstanding performance in comparison to physical mixed sample, presenting a high pressurization rate, peak pressure and short burning time. These excellent properties are possibly attributed to their uniform microstructure. Therefore, the use of electrospray method can offer a promising strategy to fabricate the microstructure controllable microspheres.
研究领域:
材料科学
·
能源领域
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Tao Yan,Hui Ren,Jie Liu,Qingjie Jiao
To improve reaction rate of energetic materials, electrospray technology was applied to develop microspheres in which recrystallized cyclotrimethylene trinitramine (RDX) was integrated with nano-Al (nAl) particles and Viton through a two-solvent strategy. Results on morphology properties and chemical heterogeneity demonstrated that the electrosprayed microspheres were hollow spheres containing well-dispersed RDX . It was suggested that RDX nano-crystals adhere tightly on both sides of the nAl@Viton skeletons, thereby increasing the contact area among components. The thermal analysis of the microspheres indicated that nAl particles accelerated the energy release by decreasing the apparent activation energy for microsphere decomposition. Experimental results showed that electrosprayed nAl@RDX@Viton had shorter laser ignition delay and more vigorous combustion flame than the physical mixture, which benefitted from the characteristic structure and synergistic effects of the components.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yucai Lu,Jiuyu Chen,Baozhong Zhu,Jiquan Wang,Cong Jiang,Minggao Xu,Yunlan Sun
Aluminum-containing hydrocarbon fuels cannot fully release their energy due to the poor dispersion and easy agglomeration of aluminum nanoparticles (ANPs). To solve the issues, oleic acid (OA) was used to modify the surface of ANPs, and then Al@OA particles were incorporated into exo-tetrahydrodicyclopentadiene (JP-10) to form Al/JP-10 bi-phase system. Experimental and molecular simulation methods were used to analyze the stability, ignition, and combustion performance of the Al/JP-10 bi-phase system. The results show that at low temperatures, OA can improve the antioxidant and hydrophobic performance of Al@OA particles, which can effectively protect the ANPs from deep oxidation . At high temperatures, OA can accelerate the oxidative exothermic process of ANPs, and the Al@OA particles can shorten the ignition delay time of JP-10 droplets and intensify the combustion. Notably, when the ratio of Al and OA is 10:3 in the Al@OA particles, the Al/JP-10 droplet exhibits the shortest ignition delay.
研究领域:
材料科学
·
燃料化学
·
分子动力学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiaogang Guo,Taotao Liang,Huisheng Huang,Binfang Yuan,Jing Wang
In 21st century, the microchip plays an essential role in data and information security, and preventing information leakage stored in chips becomes more challenging. This paper firstly introduced electrophoretic assembly technique and surface functionalization to design the C-doped nano-Al/Co 3 O 4 functional energetic material (nFEM) coating with triple stability of anti-wetting, micro-structure and energy-release for at least one year, and the energetic film was integrated with copper based-chip to construct the C-doped Al/Co 3 O 4 nFEM-chip to realize its self-destruction. Product shows outstanding anti-wetting properties with high water contact angle of 168 ± 1° and extremely low sliding angle of ∼ 1°, and well weather resistance in variable environments. Impressively, the output of heat (Q) of product can reach up to 3598 J/g nearly 85% of theoretical value with a relatively low activation energy of 235.46 kJ/mol, and keeps almost thermopositive stability even for immersed samples for fifty cycles after one year exposure test. In addition, C-doped Al/Co 3 O 4 nFEM-chip after immersion and exposure tests can also be effectively destroyed or ignited with a dazzling flame in an ultrashort time (<1ms), demonstrating the great advantage and huge application potentials for the design of other functional transient-chips with nano/micro-scale high-energy systems applied in different environments, even underwater.
研究领域:
材料科学
·
信息安全
·
能源材料
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 9
·6262-6272
·
IF 2.779
Guo Xiaogang,Liang Taotao,Liu Guixiu,He Yuanzhen,Kong Shuying,Islam Md. Labu,Yuan Binfang
Achieving controllable film-forming process is always a difficult issue for practical application, especially for bi-/multiple component composite materials. Thus, this paper firstly developed a conveniently and controllable electrophoretic assembly technique under mild conditions to design nano-Al-doped@Co 3 O 4 energetic film with wide potential applications. The stable suspension consists of isopropyl alcohol with the tracing of polyethylenimine and tween 80. The high crystallinity and uniformity of structure in target films were demonstrated by FESEM, EDX, XRD, and FT-IR techniques. Electrophoretic assembly dynamics of Al/Co 3 O 4 particles were deeply explored to provide a theoretical foundation for optimizing exothermic performance. The exothermic performance of target film can be accurately adjusted, and the output of heat ( Q ) and activation energy ( E a ) can reach up to ~ 3.6 kJ/g (close to 85% of theoretical value) and low to 230.01 kJ/mol, respectively. This breakthrough will substantially push forward the facile functional film-forming process of different kinds of particles used in fields of electronics, military, aviation, etc.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energetic Materials
·
2022
·
IF 2.421
Dongyu Hao,Yinghui Hu,Fang Wang,Debin Xia,Dakang Wang,Ruiqing Fan,Yulin Yang,Kaifeng Lin
In this work, a novel Al2O3-free core-shell structured nAl@aluminum-perfluorooctanoate (F-x) nanocomposite has been prepared via a self-assembly approach. The Al2O3 shell was first removed by hydrofluoric acid (HF) solution, and then the perfluorooctanoic acid (PFOA) was coated on the surface of nAl by a self-assemble reaction. The thickness of the obtained F-x layer can be easily tuned by using different amount of PFOA based on the chemical interaction between nAl and PFOA molecules. The obtained nAl@F-x nanocomposite showed an enhanced exothermic and combustion performance due to the synergetic effect between F-x and nAl and the mesoporous structure in situ formed during the combustion process. This work demonstrated that nAl@F-x nanocomposite prepared by PFOA coating on nAl could effectively solve the detrimental effect of in situ formed Al2O3, thus enhancing the combustion and thermal reaction performances, which showed great potential to be applied in solid rocket propellant.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2018
·Vol. 15
·期 5
·872
·
IF 2.145
Yuhui Jiang,Yixuan Shang,Shuyao Yu,Jianguo Liu
Hexachlorobenzene (HCB) contamination of soils remains a significant environmental challenge all over the world. Reductive stabilization is a developing technology that can decompose the HCB with a dechlorination process. A nanometallic Al/CaO (n-Al/CaO) dispersion mixture was developed utilizing ball-milling technology in this study. The dechlorination efficiency of HCB in contaminated soils by the n-Al/CaO grinding treatment was evaluated. Response surface methodology (RSM) was employed to investigate the effects of three variables (soil moisture content, n-Al/CaO dosage and grinding time) and the interactions between these variables under the Box-Behnken Design (BBD). A high regression coefficient value (R2= 0.9807) and lowpvalue (<0.0001) of the quadratic model indicated that the model was accurate in predicting the experimental results. The optimal soil moisture content, n-Al/CaO dosage, and grinding time were found to be 7% (m/m), 17.7% (m/m), and 24 h, respectively, in the experimental ranges and levels. Under optimal conditions, the dechlorination efficiency was 80%. The intermediate product analysis indicated that dechlorination was the process by stepwise loss of chloride atoms. The main pathway observed within 24 h was HCB → pentachlorobenzene (PeCB) → 1,2,3,4-tetrachlorobenzene (TeCB) and 1,2,4,5-TeCB. The results indicated that the moderate soil moisture content was crucial for the hydrodechlorination of HCB. A probable mechanism was proposed wherein water acted like a hydrogen donor and promoted the hydrodechlorination process. The potential application of n-Al/CaO is an environmentally-friendly and cost-effective option for decontamination of HCB-contaminated soils.Keywords:nanometallic Al/CaO;ball milling;dechlorination;response surface methodology
研究领域:
环境科学
·
土壤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Xiaogang Guo,Shuaishuai Man,Yu Li,Taotao Liang
It is still a big challenge to design self-protected energetic films or coatings due to the performance degradation under wet conditions, even underwater using environmentally friendly techniques. Thus, this paper firstly proposed an environment-protecting method to fabricate a superhydrophobic nano-Al/NiO energetic film with uniformly distributed structures and high purity via an improved electrophoretic assembly and stearic acid modification. The nano-Al/NiO energetic film with a high contact angle (CA) of 166° displayed superior anti-wettability and self-cleaning ability, and the outstanding exothermic performance of product keeps almost stable even after 10 complete immersion cycles, demonstrating the promising practicality. Our design provide a novel strategy for substantially extending safety, flexibility and adaptability of functional energetic surfaces in real industrial applications.
研究领域:
材料科学
·
环境工程
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·15242-15250
·
IF 2.478
Guo Xiaogang,Liang Taotao,Bao Hebin,Yuan Chengsong,Lai Chuan,Tang Chuyue,Giwa A. S.
The fabrication of functional nanocomposite films by electrically driven techniques is an emerging method that has attracted increasing research interest because of advantages such as easy operation, low-cost, no secondary pollution. In this study, electrophoretic assembly technique (EAT) was firstly developed to design the promising novel nano-aluminum@tungsten trioxide (nano-Al@WO 3 ) energetic coating with even distribution of nanoparticles under room temperature and pressure conditions, using the mixed liquor of isopropyl alcohol, PEG-1000, and polyethyleneimine as the optimal dispersion liquid for EAT. High crystallinity and purity of product was demonstrated by X-ray diffractometer. Differential scanning calorimetry (DSC) results that the obtained Al@WO 3 was an outstanding high-energy coating with a high output of heat (~ 2400 J/g) due to the sufficient thermite reaction between nano-Al and WO 3 particles, and the heat-release process of product can be highly controlled by adjusting the solid loading concentration ratio of nano-Al@WO 3 before EAT. Thus, the fabrication method of EAT proposed here has great potentials to high-efficient construction or design of various energetic nanocomposite coatings such as thermite and bimetallic reactive composites with wide applications.
研究领域:
材料科学
·
能量材料
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
·
2016
·Vol. 37
·期 11
·1827-1830
·
IF 0.793
Yanjun Yin,Xueming Li
In this study, an energetic material was prepared by depositing nano-Al on CuO arrays via electrophoretic deposition (EPD), which offers a feasible route for nano-Al integration. The morphology and structure of the CuO arrays and Al/CuO composites were characterized by scanning electron microscopy and X-ray diffraction. The CuO arrays were homogenously salix leaf-like structure with a width of ~150 to 200 nm. The energy density of Al/CuO composites was approximate to 1454.5 J/g by integrating the differential scanning calorimetry (DSC) plot and the combustion performance was recorded by a high-speed camera. Moreover, the combustion flames were violent and the whole reaction process only lasted 72.2 ms, indicating that the energy of the Al/CuO nanothermite can be released effectively.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2019
·Vol. 21
·期 8
·1900176
·
IF 2.906
Tao Yan,Hui Ren,Yaru Li,Huixin Wang,Qingjie Jiao
Porous nano-aluminum@polymer microspheres with a narrow size range are fabricated to exploit the energy advantages of nano-aluminum (nAl). Nitrocellulose (NC) and glycidyl azide polymer (GAP) act as functional binders and adhere tightly to the surface of nAl particles and aggregate them into spheres. The formed holes on the microsphere surface are considered gas diffusion channels to the microsphere interior. Confined combustion results show that nAl@GAP microspheres generate the highest peak pressure, and maximum pressurization rate of nAl@NC microspheres is comparatively higher than that of others. Given the microsphere structure, thermal behavior in air shows that the oxidation-reaction mechanism of the microspheres is close to that of nAl particles. Interfacial reactions between nAl particles and gases produced by polymer decomposition enhance microsphere reactivity. The heat released by polymer decomposition maintains the structure, activates nAl particles, and accelerates combustion propagation, which are positively correlated with the energy content of the polymer. The unconfined test results showed that nAl@GAP microsphere combustion propagates faster than that of nAl@NC microspheres.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）