新型节能泡沫墙材的设计与研究

泡沫混凝土是一种新型节能墙体材料,本研究制备了松香皂泡沫剂和毛发蛋白质泡沫剂,通过实验比较了两种不同泡沫剂对泡沫混凝土微观结构和性能的影响,并从泡沫剂加入量和不同水泥用量两方面影响作了比较实验。实验结果表明,毛发蛋白质泡沫剂制备的泡沫混凝土性能要优于松香皂泡沫剂制备的泡沫混凝土,在水灰比0.5、水泥:砂=1:1时,蛋白质泡沫剂加入量为1.5g时,泡沫混凝土密度仅为0.775kg/m3,抗折强度达到1.98MPa,抗压强度达到19.76MPa。

松香泡沫剂的改性研究

制备了以松香为主要原料的泡沫剂,并用明胶、十二烷基苯磺酸钠进行复配,通过发泡体积、泡沫稳定时间、半衰期、泡径、均匀度等性能参数来对泡沫剂的发泡性能和稳泡性能进行了分析研究。实验结果表明:明胶、十二烷基苯磺酸钠对松香泡沫剂的发泡和稳泡性能有较好地改善作用,其中在体积浓度为15%松香皂液50m l中,复配加入十二烷基苯磺酸钠为0.3g,明胶1g时发泡和稳泡效果最佳。

Three different low-temperature plasma-based methods for hydrophilicity improvement of polyethylene films at atmospheric pressure

Three different low-temperature plasma-based methods were used to improve the surface hydrophilicity of polyethy- lene （PE） films, and all the modification processes were carried out by employing an atmospheric pressure plasma jet （APPJ） system. （a） PE films were directly modified by APPJ using a gas mixture of He and 02. （b） Acrylic acid （AA） was introduced into the system and a polymer acrylic acid （PAA） coating was deposited onto the PE films. （c） AA was grafted onto the PE surface activated by plasma pre-treatment. It was found that the hydrophilicity of the PE films was significantly improved for all the three methods. However, the samples modified by Process （a） showed hydrophobicity recovery after a storage time of 20 days while no significant change was found in samples modified by Process （b） and Process （c）. The Fourier transform infrared spectroscopy （FTIR） results indicated that the most intensive C=O peak was detected on the PE surface modified by Process （c）. According to the X-ray photoelectron spectroscopy （XPS） analysis, the ratios of oxygen-containing polar groups for samples modified by Process （b） and Process （c） were higher than that modified by Process （a）.

基于运输通道时空理论的中巴伊土国际通道演化

为响应“一带一路”倡议,中巴伊土国际通道(中国—巴基斯坦—伊朗—土耳其)开始规划构建,现有对该通道的构建及可行性等的研究已具雏形,目前需要对通道做系统整理,促使规划能进一步圆满。为此,梳理中巴伊土国际通道的时间结构、空间结构、能力结构,整理该通道发展的历史阶段及能力发展状况,得出在交通运输能力方面不断规划与建设该通道,是一个惠及中国、巴基斯坦、伊朗、土耳其及其他沿线国家和欧洲国家的民生工程。