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51.
本文比较了纤维预浸料不同结构形式与防弹性能的关系,并详细研究了水性聚氨酯/UHMWPE纤维防弹复合材料的含胶量、面密度和叠层方式等预浸工艺参数对材料防弹性能的影响,结合弹道实验分析了各因素作用的机制。 相似文献
52.
介绍了汽车工业中的电气/电子/可编程电子系统,分析了早期汽车生命周期过程、汽车开发和安全的集成过程以及汽车功能安全生命周期的组成,研究了从IEC61508功能安全转变为适用于汽车工业的安全标准的过程,阐述了汽车功能安全中的一些重要概念,给出了汽车功能安全分析的几种方法及其优缺点。 相似文献
53.
发动机的绿色化学设计 总被引:3,自引:0,他引:3
发动机绿色化学设计以发动机化学设计概念和发动机化学反应器模型为基础,旨在实现发动机材料选择、能源利用和环境效应之间的最佳综合效益.发动机燃料系统绿色化学设计的范畴包括:汽油无铅化与汽油抗磨性,柴油低硫化与柴油润滑性,生态燃料与生态摩擦学,汽油机沉积物与汽油清净剂,柴油机颗粒(碳烟)与消烟助燃剂. 发动机润滑系统绿色化学设计的范畴包括:润滑油和添加剂与排放催化转化,润滑剂生物降解性与生物降解润滑剂,润滑油使用与质量监控. 发动机燃料/润滑系统材料绿色化学设计的范畴包括:催化助燃/补燃作用,低散热发动机高温润滑,发动机机械与化学材料制造. 发动机绿色效应的实现取决于发动机诸系统绿色化学设计问题的解决程度. 相似文献
54.
Ali Asghar Tofigh Mohammad Reza Rahimipour Mohsen Ostad Shabani Mehdi Alizadeh Fatemeh Heydari Ali Mazahery Mansour Razavi 《Journal of Manufacturing Processes》2013,15(4):518-523
In this research, an experimental study of reinforcing alumina nano-particles into the aluminum alloy matrix was implemented to verify the accuracy of modeling results obtained by feed forward neural networks. Artificial neural network combined with numerical technique were used to predict the various parameters of mechanical properties such as hardness, tensile and compressive yield stress, UTS and elongation percentage. Much experimentation were taken to discover a suitable number of hidden neurons, avoid detraction from the trainability and enable feed forward neural networks to solve more complex problems. The predictions were found to be consistent with experimental measurements. 相似文献
55.
Alexander Bismarck Alexis Baltazar-Y-Jimenez Katharine Sarikakis 《Environment, Development and Sustainability》2006,8(3):445-463
Much academic research and industrial development explores new ways to create greener and environmentally friendlier chemicals
and materials for a variety of applications. A significant part of this work focuses on the development, processing and manufacturing,
recycling and disposal of green plastics, adhesives, polymer composites, blends and many other industrial products from renewable resources. Natural fibres
offer the potential to deliver greater added value, sustainability, renewability and lower costs especially in the automotive
industry. Further research involves the fibre crop production. The ever-increasing volume of scientific literature refers
with enthusiasm to the potential of natural fibres in technological, economic and ecological terms. This enthusiasm tends
to also expand to the areas of human life and socio-economic development for the fibre crop growers and their communities.
However, there is very little debate or evidence to support statements about the assumed advantages for the affected population
in rural areas. We argue that despite the predicted new boom in the demand of natural fibres, it is unlikely that this will
represent a real improvement in the quality of life of crop fibre growers and their communities. This paper examines the experience
of Mexico as a case study and argues that only through consistent political will and co-operation between governments, industry,
scientists, consumer groups and local communities, as well as a suitable economic strategy such as local subsidies, a truly
sustainable economic development, social equity and improved environmental quality will be achieved for tens of thousands
of natural fibre growers. 相似文献
56.
Enhanced adsorption of Methylene Blue from aqueous solution by chitosan-g-poly (acrylic acid)/vermiculite hydrogel composites 总被引:2,自引:1,他引:1
A series of chitosan-g-poly (acrylic acid)/vermiculite hydrogel composites were synthesized and used as adsorbents for the
investigation of the e ect of process parameters such as vermiculite content, pH of dye solution, contact time, initial concentration
of dye solution, temperature, ionic strength and concentration of surfactant sodium dodecyl sulfate on the removal of Methylene Blue
(MB) from aqueous solution. The results showed that the adsorption capacity for dye increased with increasing pH, contact time
and initial dye concentration, but decreased with increasing temperature, ionic strength and sodium dodecyl sulfate concentration in
the present of the surfactant. The adsorption kinetics of MB onto the hydrogel composite followed pseudo second-order kinetics and
the adsorption equilibrium data obeyed Langmuir isotherm. By introducing 10 wt.% vermiculite into chitosan-g-poly (acrylic acid)
polymeric network, the obtaining hydrogel composite showed the highest adsorption capacity for MB, and then could be regarded as a
potential adsorbent for cationic dye removal in a wastewater treatment process. 相似文献
57.
多功能富氧净水器在养殖领域的研究与应用 总被引:1,自引:0,他引:1
多功能富氧净水器的研究,采用聚丙烯微孔滤膜、复合活性炭纤维、酸性洗涤纤维及复合炭粒作为过滤吸附材料,并采用三碘树脂杀菌剂和载银活性炭复合杀菌剂进行灭菌,应用"综合过滤渗透法"的机理,将净化、矿化、灭菌、增氧等有机结合并进行反复的研究和试验,有效去除了水中微生物、污染物,降低化学需氧量和水的硬度,达到净化水质,增加水中溶解氧等预期效果,成功的应用在水产养殖等领域。 相似文献
58.
59.
废印刷线路板非金属粉-木塑复合材料性能 总被引:1,自引:1,他引:0
利用废印刷线路板非金属粉、木粉和聚氯乙烯制备复合材料,研究了复合材料的物理力学性能.结果表明:添加40目(0.35 mm)粒径非金属粉的非金属粉-木塑复合材料的各项性能整体优于添加20目(0.83 mm)粒径的复合材料;随着复合材料中40目粒径非金属粉替代量的增加,复合材料冲击强度、静曲强度整体呈下降趋势,内结合强度总体呈上升趋势, m(非金属粉)∶m(木粉)为30∶20时,静曲强度和内结合强度分别为31.74 和2.10 MPa,满足相应的国家标准和行业标准;40目粒径非金属粉-木塑复合材料的静曲模量随着非金属粉和木粉比率的增加先上升后下降,在m(非金属粉)∶m(木粉)为15∶35时达到最大值(2 853 MPa);24 h吸水厚度膨胀率和24 h吸水率分别优于硬质纤维板国家标准和地板基材用纤维板行业标准要求值. 相似文献
60.
Yongpeng M Bailong Mu Xiaojing Zhang Hongzhong Zhang Haomiao Xu Zan Qu Li Gao 《环境科学学报(英文版)》2019,31(5):111-120
Hierarchical Ag-SiO_2@Fe_3O_4 magnetic composites were selected for elemental mercury(Hg~0) removal from non-ferrous metal smelting flue gas in this study. Results showed that the hierarchical Ag-SiO_2@Fe_3O_4 magnetic composites had favorable Hg~0 removal ability at low temperature. Moreover, the adsorption capacity of hierarchical magnetic composite is much larger than that of pure Fe_3O_4 and SiO_2@Fe_3O_4. The Hg~0 removal efficiency reached the highest value as approximately 92% under the reaction temperature of 150°C, while the removal efficiency sharply reduced in the absence of O_2. The characterization results indicated that Ag nanoparticles grew on the surface of SiO_2@Fe_3O_4 support. The large surface area of SiO_2 supplied efficient reaction room for Hg and Ag atoms. Ag–Hg amalgam is generated on the surface of the composites. In addition, this magnetic material could be easily separated from fly ashes when adopted for treating real flue gas, and the spent materials could be regenerated using a simple thermal-desorption method. 相似文献