以齐聚副产物制备耐高温泡沫剂

以齐聚副产物为原料在实验室分别以AlCl3、AlCl3络合物和杂多酸为催化剂合成并经磺化制备了用于提高石油采收率的耐高温泡沫剂，试验结果说明烷基碳数为16的异构烷基苯磺酸盐常温发泡性能最佳，烷基碳数大于20的正构烷基苯磺酸盐高温发泡性能最佳，后者特别适合高温蒸汽驱油。加入适当的非离子助剂及无机盐能够提高磺酸盐的水溶性，改善发泡剂溶液的稳定性。     

LF泡沫精炼渣脱硫动力学的实验研究

对CaO -Al2 O3 -SiO2 系泡沫精炼渣进行了实验室脱硫动力学研究 ,得到的硫传质系数为 1.45 9× 10 -5m s。还就泡沫精炼渣中发泡剂对其脱硫能力的影响进行了研究。     

乳化炸药的高温化学发泡

文中在阐述ＮＨ４ＮＯ３－ＮａＮＯ２－Ｈ２Ｏ发泡体系的发泡机制的基础上，推导出了就获得较低的反应速率ｒＲ和气体生成量ｎ的高ｐＨ值对高温的平衡关系，从而提出了高温发泡技术。     

夏季面漆起泡的预防

面漆漆膜在夏季潮湿天气下成膜后3—5天，漆膜表面易形成米粒状的漆泡，针对漆泡的现象，寻找其形成的机理，根据起泡的机理采取预防面漆起泡的措施。     

熔体吹气发泡法制备泡沫铝合金研究

泡沫金属是近年来发展起来的一种新型材料。文章采用熔体吹气发泡法制备出了孔径为5．0—8．3mm，壁厚为0．040—0．076mm，密度为0．19—0．40g／cm^3，孔隙率为85．2％—93．0％的Al—Si泡沫铝合金，并着重讨论了发泡温度、气体流量、SiC粉末体积百分含量对泡沫铝合金形成的孔径和壁厚的影响关系。     

Effects of surfactant and particle size on the microstructure and strength of Si3N4 foams with high porosity

The highly porous Si₃N₄ ceramic foams were prepared by direct foaming with mixed surfactants. The surface tension and viscosity of slurries were tailored by different carbon chain length of surfactants and different mean Si₃N₄ particle size to achieve the pore size controlling. The nearly linear relationship between the pore size and the ratio of surface tension to viscosity was observed, which indicates that the pore size could be precisely tailored by the slurry properties. Si₃N₄ ceramic foams with porosity of nearly 94%, mean pore size of 110–230 µm, and compressive strength of 1.24–3.51 MPa were obtained.     

THE STRUCTURE CONTROL OF ALUMINUM FOAMS PRODUCED BY POWDER COMPACTED FOAMING PROCESS

A new technique, powder compact foaming process for the production of aluminum foams has been studied in this article. According to this method, the aluminum powder is mixed with a powder foaming agent (Till2). Subsequent to mixing, the powder blend is hot compacted to obtain a dense semi-finished product. Upon heating to temperatures within the range of the melting point, the foaming agent decomposes to evolve gas and the semi-finished product expands into a porous cellular aluminum. Foaming process is the key in this method. Based on experiments, the foaming characteristics were mainly analyzed and discussed. Experiments show that the aluminum-foam with closed pores and a uniform cell structure of high porosity can be obtained using this method by adjusting the foaming parameters: the content of foaming agent and foaming temperature.     

高锰钢的泡沫陶瓷过滤净化

采用泡沫陶瓷过滤片对高锰钢进行过滤处理，对其进行金相分析和测试密度，冲击韧性和耐磨性能，并与未过滤的高锰钢进行对比，实验结果表明，在过滤的高锰钢中，金属夹杂物明显减小，密度提高0．53％，冲击韧性39．5％，耐磨性能提高1．04倍，批量生产结果表明，过滤的高锰钢球磨机衬板的使用寿命提高0．6－0．7倍。     

(CO2 + 2‐propanol) mixture as a foaming agent for polystyrene: A simple thermodynamic model for the high pressure VLE‐phase diagrams taking into account the foam vitrification

The equation of state model developed by Lacombe and Sanchez (J Phys Chem 1976, 80, 2352) is used in the form proposed later by Sanchez and Stone (Polymer Blends, Vol. 1: Formulation, 2000; Chapter 2) to correlate experimental vapor‐liquid equilibrium (VLE) data for the three binaries and the ternary systems. Experimental data from the binary systems carbon dioxide‐isopropyl alcohol (CO₂‐IPrOH), isopropyl alcohol‐polystyrene (IPrOH‐PS), and carbon dioxide‐polystyrene (CO₂‐PS) are used to calculate VLE properties for the ternary system CO₂‐IPrOH‐PS. Two‐dimensional VLE‐phase diagrams were calculated and used to describe from a thermodynamic point of view the pressure, volume, and temperature values that characterize a thermoplastic foam evolution process, from the extruder to the foaming die. For different initial mixture CO₂ + IPrOH concentrations, pressure reduction produces liquid foaming until the vitrification curve arrests the final foam volume expansion. The dependence of the vitreous transition with the system CO₂ + IPrOH concentration while foaming is represented by the Chow (Macromolecules 1980, 13, 362) equation. The calculation procedure is proposed as a design tool to reduce the amount of experimental data usually needed as a requirement previous to the design stage. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 2663–2671, 2007