A series of 0-3 composites of the polyvinylidene fluoride (PVDF) and BaTiO 3 was prepared.BaTiO 3 was modified with titanate coupling agent.The dielectric properties and the interfacial interaction of composites by ...A series of 0-3 composites of the polyvinylidene fluoride (PVDF) and BaTiO 3 was prepared.BaTiO 3 was modified with titanate coupling agent.The dielectric properties and the interfacial interaction of composites by different preparation methods were examined and compared.The result shows that the relative dielectric constant ε of the composite prepared in solution has a maximum value at about 70% weight fraction of BaTiO 3 and the dielectric loss tanδ increases rapidly when the fraction exceeds 70%.For the composite prepared in melt,the relative dielectric constant ε almost reaches a maximum value at about 60% weight fraction of BaTiO 3 and the dielectric loss is comparatively lower.The dielectric properties of composites are improved by using a coupling agent.展开更多
用硅烷和钛酸酯偶联剂对 Ba Ti O3粉进行了表面处理 ,使用溶剂法制备了 PVDF/Ba Ti O3复合薄膜。通过疏水亲油实验定性地分析了硅烷和钛酸酯偶联剂对 Ba Ti O3粉的偶联作用可以改善 PVDF/Ba-Ti O3的界面结合 ,通过测定 PVDF/Ba Ti O3的...用硅烷和钛酸酯偶联剂对 Ba Ti O3粉进行了表面处理 ,使用溶剂法制备了 PVDF/Ba Ti O3复合薄膜。通过疏水亲油实验定性地分析了硅烷和钛酸酯偶联剂对 Ba Ti O3粉的偶联作用可以改善 PVDF/Ba-Ti O3的界面结合 ,通过测定 PVDF/Ba Ti O3的介电常数和介电损耗角正切值表征了复合材料的介电性能 ,PVDF/Ba Ti O3扫描电子显微镜 (SEM)的微观形态分析发现 ,经过偶联剂表面处理 ,Ba Ti O3粉在PVDF中的分散情况改善 。展开更多
BaTiO 3/ PVDF nanocomposites were prepared via in-situ growth of nanosized BaTiO 3 particles in PVDF matrix by using the sol-gel method.The present elements of BaTiO 3/PVDF nanocomposites were analyzed by an electr...BaTiO 3/ PVDF nanocomposites were prepared via in-situ growth of nanosized BaTiO 3 particles in PVDF matrix by using the sol-gel method.The present elements of BaTiO 3/PVDF nanocomposites were analyzed by an electron probe X-ray microanalyser.Nanosized BaTiO 3 grown in the composite films was characterized by an X-ray diffractometer and a transmission electron microscope,and the dielectric properties of the composite films were measured.The distribution of BaTiO 3 nanoparticles in-situ grown in the PVDF matrix was examined using a scanning electron microscope.展开更多
基金theNationalNaturalScienceFoundationofChina (No .5 0 172 0 10 )
文摘A series of 0-3 composites of the polyvinylidene fluoride (PVDF) and BaTiO 3 was prepared.BaTiO 3 was modified with titanate coupling agent.The dielectric properties and the interfacial interaction of composites by different preparation methods were examined and compared.The result shows that the relative dielectric constant ε of the composite prepared in solution has a maximum value at about 70% weight fraction of BaTiO 3 and the dielectric loss tanδ increases rapidly when the fraction exceeds 70%.For the composite prepared in melt,the relative dielectric constant ε almost reaches a maximum value at about 60% weight fraction of BaTiO 3 and the dielectric loss is comparatively lower.The dielectric properties of composites are improved by using a coupling agent.
文摘用硅烷和钛酸酯偶联剂对 Ba Ti O3粉进行了表面处理 ,使用溶剂法制备了 PVDF/Ba Ti O3复合薄膜。通过疏水亲油实验定性地分析了硅烷和钛酸酯偶联剂对 Ba Ti O3粉的偶联作用可以改善 PVDF/Ba-Ti O3的界面结合 ,通过测定 PVDF/Ba Ti O3的介电常数和介电损耗角正切值表征了复合材料的介电性能 ,PVDF/Ba Ti O3扫描电子显微镜 (SEM)的微观形态分析发现 ,经过偶联剂表面处理 ,Ba Ti O3粉在PVDF中的分散情况改善 。
文摘BaTiO 3/ PVDF nanocomposites were prepared via in-situ growth of nanosized BaTiO 3 particles in PVDF matrix by using the sol-gel method.The present elements of BaTiO 3/PVDF nanocomposites were analyzed by an electron probe X-ray microanalyser.Nanosized BaTiO 3 grown in the composite films was characterized by an X-ray diffractometer and a transmission electron microscope,and the dielectric properties of the composite films were measured.The distribution of BaTiO 3 nanoparticles in-situ grown in the PVDF matrix was examined using a scanning electron microscope.
文摘采用并列电纺技术制备了具有并列结构的Sb_(2)O_(3)@PMIA/TPP@PVDF-CTFE锂离子电池复合隔膜,对复合隔膜的力学性能、热稳定性能、阻燃性能、电解液润湿性等性能进行分析测试。结果表明,复合隔膜具有较高的力学性能(拉伸强度为11.7 MPa),优异的热稳定性(220℃下热处理0.5 h后只有略微形变),良好的阻燃性能和优异的电解液润湿性,且其孔隙率和吸液率也较高(分别为277%、78%),离子电导率也高达2.67 m S/cm,表明制备的并列结构复合隔膜有效的提高了电池的安全性与离子传输能力。
