螺旋直径对螺旋管泡状流截面分布特性的影响

研究了不同螺旋直径螺旋管中泡状流的相界面参数（空泡份额、相界面浓度、气泡尺寸等）的截面分布特性。通过图像法标定了电导探针的测试精度,并通过合理地处理双头电导探针,得到了螺旋管中泡状流的空泡份额、相界面浓度和气泡数量频率的定量分布云图。为进一步量化地描述相界面参数的分布特征,采用统计方法定义了截面平均参数、相界面离散系数和气泡平均聚集坐标来表征其特性。实验结果表明,随着管道旋转直径的增大,气泡截面平均空泡份额有所下降,分布范围缩小,平均聚集坐标向上方和外侧移动,气泡尺寸整体上有所下降。     

医疗垃圾焚烧炉烟气治理工程设计与应用

广东某医疗垃圾焚烧站有四台医疗垃圾焚烧炉,为了使焚烧炉排放的烟气达到环保排放标准,彻底地治理医疗垃圾焚烧的烟气污染,为每台焚烧炉各新建一套烟气治理系统,烟气治理系统采用余热回收锅炉—急冷塔—喷雾干燥塔—布袋除尘器工艺处理,烟气经该工艺处理后稳定达标排放。     

Au/TS‐1 catalyst for propene epoxidation with H2/O2: A novel strategy to enhance stability by tuning charging sequence

For propene epoxidation with H₂ and O₂, the catalytic performance of Au/TS‐1 catalyst is extremely sensitive to preparation parameters of deposition‐precipitation (DP) method. In this work, effect of charging sequence in DP process on catalyst structure and catalytic performance of Au/TS‐1 catalyst is first investigated. For different charging sequences, the compositions of Au complexes (e.g., [AuCl(OH)₃]^?) and pore property of TS‐1 (i.e., with or without H₂O prefilling micropores) could affect the transfer of Au complexes into the micropores, resulting in different Au locations and thus significantly different catalytic performance. Notably, when TS‐1 is first filled with H₂O and then mixed with Au complexes, the reduced Au/TS‐1 catalyst could expose Au nanoparticles on the external surface of TS‐1 and show high stability. The results provide direct evidence showing that micropore blocking is the deactivation mechanism. Based on the results, a simple strategy to design highly stable Au/Ti‐based catalysts is developed. © 2016 American Institute of Chemical Engineers AIChE J, 62: 3963–3972, 2016     

水的活性化与活性水、功能水

该文在叙述水的基本性质后，较详细介绍了水的活性化和活性水的特征及制备方法，指出活性水是一种具有多种功能高质量的水。     

A comparative study on UV light activated porous TiO2 and ZnO film sensors for gas sensing at room temperature

In order to find a new approach for screening the photoactivated gas sensing materials with high sensitivity, a comparative study was carried out. With the simple technique of screen printing, TiO₂ and ZnO were used to fabricate the UV light activated gas sensors which were applied at room temperature. To facilitate the simultaneous measurements of the current transients of the two materials, they were printed on the same alumina substrate. Compared with ZnO, TiO₂ exhibited a superior performance to ethanol and formaldehyde gases. It was found that the responses of TiO₂ increased with the concentration of test gas and amounted to 224 and 1700 to 100 ppm ethanol and formaldehyde gases, respectively, while the responses of ZnO to 100 ppm ethanol and formaldehyde gases were 0.14 and 1.5, respectively. The mechanism of such a huge difference between TiO₂ and ZnO was discussed in detail. Furthermore, it is suggested that metal oxide semiconductor with lower photo-to-dark current ratio can achieve higher photoactivated gas sensitivity.     

Preparation of polypropylene/glass fiber composite with high performance through interfacial crystallization

This paper reported an approach to improve the interaction between glass fiber (GF) and polypropylene (PP) through interfacial crystallization. The experimental results showed that polar nucleating agents had strong interaction with GF and tended to deposit on the surface of GF through the dip‐coating method. Since the nucleating agents had good lattice matching with PP, the modified GF could promote the interfacial crystallization of PP to increase the interfacial interaction between GF and PP and improve the performance of PP/GF composites. However, at high processing temperature, the nucleating agents dissolved into the polymer melts, and the nucleation on the GF surface for PP crystallization decreased, impairing the interface compatibility and the final performance of the PP/GF composites. J. VINYL ADDIT. TECHNOL., 23:284–289, 2017. © 2015 Society of Plastics Engineers     

用MWECR CVD系统制备具有非晶/微晶两相结构的硅薄膜研究

用微波电子回旋共振化学气相沉积(MWECR CVD)系统制备了具有非晶/微晶两相结构的硅薄膜,研究了沉积温度和沉积压力等对制备微晶硅薄膜的结构和电学特性的影响.结果表明:较低的反应压和较高的衬底温度有利于获得非晶/微晶两相结构的硅薄膜,当反应压为0.7 Pa、衬底温度为170℃时,得到非晶/微晶两相结构的硅薄膜晶相体积比约为30%;具有这种晶相体积比的非晶/微晶两相结构的硅薄膜,μτ乘积值约为10-5量级左右,比不含微晶成分的氢化非晶硅样品的μτ乘积值大约2个量级,同时这种晶相体积比的非晶/微晶两相结构的硅薄膜的光敏性在103～104左右,其兼具很好的光电导稳定性和优良的光电特性,是制备非晶硅太阳电池的器件级本征层材料.     

炭黑在两相高分子导电复合材料中选择性分布研究进展

综述了影响炭黑在两相高分子复合材料中选择性分布的因素及炭黑的选择性分布对复合材料电性能的影响,指出了炭黑填充导电高分子复合材料的研究方向。     

铝基复合材料的腐蚀研究现状

总结了近年来铝基复合材料腐蚀研究的有关文献,分析了碳化硅,碳纤维,三氧化二铝和硼纤维等增强物对铝金属基体腐蚀的影响,一般而言,铝基复合材料比基体铝合金更容易产生腐蚀。     

Evaluation of urban river landscape design rationality based on AHP

An evaluation model for the rationality of the landscape design of urban rivers was established with the analytic hierarchy process （AHP） method so as to provide a foundation for updating the landscape design of urban rivers. The evaluation system was divided into four layers, including the target layer, the comprehensive layer, the element layer, and the index layer. Each layer was made of different indices. The evaluation standards for each index were also given in this paper. This evaluation model was proved tenable through its application to the landscape design rationality evaluation of the Weihe River in Xinxiang City of Henan Province. The results show that the water quality, space, activity, facility, community, width of vegetation, sense of beauty and water content are among the most influential factors and should be considered the main basis for evaluating the rationality of the landscape design of urban rivers.