PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed t...PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed the filling of nano-SiO2 decreased the breaking elongation of PTFE composites,but increased the tensile strength and the hardness of the materical.When the content of nano-SiO2 was 7% by mass, PTFE / nano-SiO2 composites had good mechanical properties.with the increase of nano-SiO2 content the PTFE composites changed from tuough and plastic into hard brittle material.展开更多
以几种不同的2.5D衍生结构织物为增强体,制备了法向增强、经向增强及经法向增强2.5D Si O2f/Si O2复合材料,比较了上述材料与现有2.5D Si O2f/Si O2复合材料的经向力学性能,并研究了经法向增强2.5D结构复合材料中增强纱比例、纤维体积...以几种不同的2.5D衍生结构织物为增强体,制备了法向增强、经向增强及经法向增强2.5D Si O2f/Si O2复合材料,比较了上述材料与现有2.5D Si O2f/Si O2复合材料的经向力学性能,并研究了经法向增强2.5D结构复合材料中增强纱比例、纤维体积分数与材料性能之间的关系,对织物结构进行了优化。结果表明,经法向增强2.5D Si O2f/Si O2复合材料的经向力学性能较现有2.5D复合材料有显著提高,该材料在较低密度下(1.6 g/cm3),经向拉伸强度与现有材料(1.65 g/cm3)持平,且经向压缩强度接近现有材料的4.3倍。展开更多
文摘PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed the filling of nano-SiO2 decreased the breaking elongation of PTFE composites,but increased the tensile strength and the hardness of the materical.When the content of nano-SiO2 was 7% by mass, PTFE / nano-SiO2 composites had good mechanical properties.with the increase of nano-SiO2 content the PTFE composites changed from tuough and plastic into hard brittle material.
文摘以几种不同的2.5D衍生结构织物为增强体,制备了法向增强、经向增强及经法向增强2.5D Si O2f/Si O2复合材料,比较了上述材料与现有2.5D Si O2f/Si O2复合材料的经向力学性能,并研究了经法向增强2.5D结构复合材料中增强纱比例、纤维体积分数与材料性能之间的关系,对织物结构进行了优化。结果表明,经法向增强2.5D Si O2f/Si O2复合材料的经向力学性能较现有2.5D复合材料有显著提高,该材料在较低密度下(1.6 g/cm3),经向拉伸强度与现有材料(1.65 g/cm3)持平,且经向压缩强度接近现有材料的4.3倍。
