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111.
Wanjun Liu Amar K. Mohanty Per Askeland Lawrence T. Drzal Manjusri Misra 《Journal of Polymers and the Environment》2008,16(3):177-182
Chemical modification of soy protein with monomers such as maleic anhydride, glycidyl methacrylate and styrene was accomplished
using reactive extrusion technology. Thermal and mechanical properties of the modified soy protein plastics were characterized
with differential scanning calorimetry (DSC), a dynamic mechanical analyzer (DMA) and a United Testing System load frame.
It was found that the denaturation temperature and the glass transition temperature of soy protein plastic changed. In addition,
the tensile properties of modified soy protein plastic improved. Attenuated total reflection Fourier transform infrared (ATR-FTIR)
and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure of modified soy proteins. A suggestion
of the interaction between soy protein and functional group in functional polymers is given. Through the in-situ interaction
between the polymer and soy protein plastic, the mechanical properties of the soy protein plastic can be adjusted and controlled. 相似文献
112.
Yan Ma Xiaoming Du Yi Shi Deyi Hou Binbin Dong Zhu Xu Huiying Li Yunfeng Xie Jidun Fang Zheng Li Yunzhe Cao Qingbao Gu Fasheng Li 《Frontiers of Environmental Science & Engineering》2016,10(6):6
In recent years, many industrial enterprises located in the urban centers of China have been relocated owing to the rapid increase in urban development. At the sites abandoned by these enterprises, volatile organic compounds have frequently been detected, sometimes at high concentrations, particularly at sites abandoned by chemical manufacturing enterprises. With the redevelopment of sites and changes in land-use type associated with these sites, substantial amounts of contaminated soils now require remediation. Since China is a developing country, soil remediation warrants the usage of techniques that are suitable for addressing the unique challenges faced in this country. Land shortage is a common problem in China; the large numbers of contaminated sites, tight development schedules, and limited financial resources necessitate the development of cost-effective methods for land reclamation. Mechanical soil aeration is a simple, effective, and low-cost soil remediation technique that is particularly suitable for the remediation of large volatile organic compound-contaminated sites. Its effectiveness has been confirmed by conducting laboratory studies, pilot tests, and full-scale projects. This study reviews current engineering practice and developmental trends of mechanical soil aeration and analyzes the advantages and disadvantages of this technology for application in China as an emerging soil remediation market. The findings of this study might aid technology development in China, as well as assist other developing countries in the assessment and implementation of costeffective hazardous waste site soil remediation programs.
相似文献
113.
本文介绍了国际合作项目DECOVALEX在核废料深埋处理安全性分析的热—水—力耦合模型研究方面的新进展。 相似文献
114.
为系统深入地研究机械炉排式垃圾焚烧炉内的焚烧特性,利用ANSYS Fluent软件进行了炉排炉内垃圾焚烧特性的数值模拟,模拟结果与实际运行数据基本一致。在此基础上,对炉排运行速度、进料含水率及助燃风含氧量等关键燃烧特性参数对垃圾焚烧过程的影响规律进行了模拟研究。 相似文献
115.
《Journal of Manufacturing Processes》2014,16(4):527-534
This paper addresses the weldability of 6 mm thick plates of super-duplex stainless steel by electron beam welding (EBW) process. Microstructure investigations conducted using optical and SE microscopy showed the presence of large ferrite grains with intra- and inter-granular austenite. Ferrite content studies on the weld zone estimated that there is no significant element partitioning between austenite and ferrite phases. Hardness studies portrayed that the weld hardness is found to be greater than the parent metal which is acquainted due to the solid solution strengthening effect. Tensile results corroborated that the joints obtained by EB welding process have better strength than the base metal. A detailed structure–property relationships has also been carried out through point and line mapping EDAX analysis across the weldment to substantiate the discussions. 相似文献
116.
《Journal of Manufacturing Processes》2014,16(2):166-175
Aluminum–lithium (Al–Li) alloys are very attractive for potential aerospace applications due to their lower density, higher specific strength and rigidity, better corrosion and fatigue crack growth resistance properties, compared to conventional aluminum alloys. Laser beam welding (LBW), being an advanced joining method, has already been approved for applications involving aluminum alloys. However, there are still a number of problems and issues to be answered and solved in LBW of Al–Li alloys. In this review, the properties of Al–Li alloys and the characteristics of LBW are introduced, the formation and prevention of the main weld defects such as porosity and hot cracking are discussed, and then the weld microstructure and the joint mechanical properties are described in highlight. At the end, an outlook on future trends is presented. 相似文献
117.
118.
土壤环境机械组成特征及其分布规律 总被引:4,自引:0,他引:4
通过对甘肃省土壤环境机械组成的调查研究,较全面、系统地获得了各种土质各区域的土壤环境机械组成,找出了甘肃省土壤环境机械组成特征及其分布规律。 相似文献
119.
为了研究混凝土材料的结构与力学特征受火灾热-冷作用的影响规律,通过测量不同热-冷作用次数下的试样质量和密度损失率定量表征了混凝土结构损伤程度;通过开展单轴压缩实验对热-冷作用对其力学行为的变化规律进行了研究;最后进行XRD衍射实验和SEM扫描电子显微镜对混凝土的成分与微观结构进行探测.实验结果表明:在火灾热-冷作用下,... 相似文献
120.
Mechanical and Biological Treatment (MBT) is an important strategy to manage Municipal Solid Waste (MSW) in Europe. The presence of recyclable materials on MSW depends on different factors such as inefficiencies in the Municipal Solid Waste collecting schemes and to the low level of citizenship environmental education. Among other products, MBT plants produce a residual fraction, named here as heavy residual fraction, that contains a significant amount of packaging glass which in Portugal is currently landfilled. This material is not recycled because it is heavily contaminated with other materials, preventing its processing in Material Recovery Facilities (MRF).In this paper the characterization, including particle size and composition, of the residual fraction of six Portuguese MBT plants is presented. The relevant variables that determine the heavy residual fraction characteristics were identified. It was observed that the MBTr particle size distribution is different and depends mainly on the place on the flowsheet where the MBTr exits the process, which is determined by the type of biological process and by the aperture of the last screen where the product passes through. The content in glass varies from 33 to 83%. These values are mainly related with the upstream glass sorting and with the efficiency of the recovery of the organic fraction which is the glass main contaminant. The second main contaminant is “stones”.The quantity of glass contained in this product in all the plants that will be in operation in Portugal in 2014 was estimated. The work shows that if all the 48,000 of glass could be recovered the Portuguese recycling rate would increase by 4.4%. 相似文献