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Using forming-knitting technology and organic materials, copper foam with high porosity (>80%) and open-pore structure was successfully prepared. According to the method of immersion, the technical characteristics of metal paste performance and influence factors of sinter process were discussed. The pore morphology and compressibility of copper foam were detected simultaneously, and the structural property of copper foam prepared by the process of once-infiltrating was compared with the one of copper foam prepared by the process of twice-infiltrating. The results show that pH value of metal paste has a large influence on rheological properties of slurry. By twice-infiltrating process, the microstructure of copper foam was altered. In case of the porosity dropping indistinctly, the compression stress of copper foam platform was raised from 0.5 MPa to 1 Mpa which was of great significance to improve the energy absorption capacity of the material.  相似文献   
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基于强碱对涤纶纱线具有显著的减量作用,用NaOH溶液对涤纶纱线进行处理,以减少纺织加工过程的静电问题.通过实验,对比分析了碱处理的NaOH浓度和反应温度对涤纶纱线的碱减量和强度的影响,得出了最佳工艺条件为NaOH浓度50g/L,反应温度80℃,碱处理时间2h.以苯胺为原料,对碱减处理过的涤纶采用原位聚合法,制备了聚苯胺/涤纶复合导电纱线.对比研究了过硫酸铵与苯胺单体的摩尔比和硫酸浓度对纱线导电性能的影响,得出了最佳工艺条件为过硫酸铵/苯胺单体摩尔比1∶1,硫酸浓度1mol/L,反应时间6h,反应温度15~25℃.最佳工艺条件下,涤纶纱线的电阻约为300Ω/cm.  相似文献   
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以Ca(NO3)2·4H2 O和P2 O5为前驱体,无水乙醇为溶剂,采用Sol-Gel法制备 HAP纳米材料.通过扫描电镜对 HAP样品的颗粒形貌和粒度尺寸进行表征,并用X衍射分析仪对 HAP样品进行物相分析.对比研究了水浴温度、陈化时间和焙烧温度等因素对 HAP纳米材料性能的影响.得出制备纳米羟基磷灰石材料的最佳工艺条件:水浴温度40℃,陈化时间70 h ,焙烧温度800℃.  相似文献   
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Polyaniline /Polyester( PANI /PET) composite conductive fabric is prepared through in-situ polymerization process using aniline as monomer and PET fabric as matrix,which is treated with alkali deweighting and low temperature plasma. The property of PANI /PET composite conductive fabric is studied and characterized,including scanning electron microscope( SEM), infrared spectroscopy, conductivity, wash fastness and mechanical properties. The results show that the optimal polymerization conditions: the molar ratio of ammonium persulfate and aniline is1∶ 1,the concentration of sulfuric acid is 1 mol /L and reaction time is 90 min. Under optimum conditions,the surface resistivity of PANI /PET composite conductive fabric is about 170 Ω. After washed 5 times, the surface resistivity of PANI /PET composite conductive fabric is stable at 1 450 Ω. The breaking strength and breaking elongation of PANI /PET composite conductive fabric decrease compared with PET fabric.  相似文献   
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