对Fe2O3-化聚乙烯化物/聚甲基酸的介电参数的分析) 混合复合材料复合材料
Minal Bafna1, Farah Deeba2,3, Ankit K Gupta1
1Department of Physics, Agrawal P. G. College, Jaipur 302003, India.
Molecules (Basel, Switzerland)
|August 12, 2023
概括
将纳米铁氧化物 (Fe2O3) 添加到PVDF/PMMA聚合物混合物中,可以提高电导率和介电性质. 较高的Fe2O3度提高了交流电导率和电容性,影响了放松过程.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 聚乙烯化物 (PVDF) 和聚甲基酸 (PMMA) 混合物是广泛使用的聚合物.
- 金属氧化物纳米粒子可以改变聚合物复合材料的电气和结构性质.
- 了解这些修改对于开发先进的功能材料至关重要.
研究的目的:
- 研究不同铁氧化物 (Fe2O3) 纳米颗粒度对PVDF/PMMA聚合物混合物的结构和电性能的影响.
- 分析介电常数,电模谱和交流电导率.
- 为了将结构变化与观察到的电特性变化相关联.
主要方法:
- 制备PVDF/PMMA (30/70重量比) 复合材料,其中Fe2O3负载为0.5%,1%,2%和4%.
- 使用X射线衍射 (XRD) 和富里埃变换红外光谱 (FTIR) 进行结构分析.
- 使用阻抗分析仪从100 Hz到1 MHz进行电性能测量 (介电常数,损失触点,交流电导率).
主要成果:
- 复杂的电容性和介电损失触点的实部分是独立于频率的,从20KHz到1MHz.
- 这些电气参数随着Fe2O3度的增加而增加.
- 交流电导率在增加Fe2O3负载时表现出类似的上升趋势.
- 电模谱显示了与Maxwell-Wagner-Sillars机制和聚合物链细分运动相关的放松过程.
结论:
- 2O3负载对PVDF/PMMA复合材料的结构和电气特性有很大的影响.
- 增加Fe2O3含量可以提高介电特性和交流电导率.
- 该研究提供了关于放松动态和这些纳米复合材料的潜在应用的见解.
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