用TPAI或THAI盐混合的多PVA/PVP混合物的结构,光学和电气参数
A M El-Naggar1, Shadia Z Brnawi2, A M Kamal2
1Research Chair of Exploitation of Renewable Energy Applications in Saudi Arabia, Physics & Astronomy Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Polymers
|June 28, 2023
概括
聚乙醇/聚乙烯罗利的聚合物混合物添加四胺或四胺盐显示了增强的紫外线屏蔽性能. 这些材料具有较小的光学带间隙和高折射率,因此适合于紫外线保护应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 光电学是指光电子产品.
背景情况:
- 聚合物混合物为先进的应用提供可调节的特性.
- 四级盐可以改变聚合物特性.
- 了解盐-聚合物相互作用对于材料设计至关重要.
研究的目的:
- 用于制备和表征与TPAI和THAI盐合的PVA/PVP聚合物混合物.
- 研究盐类型和度对光学和电气性能的影响.
- 评估这些混合物作为UV屏蔽材料的潜力.
主要方法:
- 用DMSO溶剂制备的聚合物混合物.
- 用于结晶性分析的X射线衍射 (XRD).
- 扫描电子显微镜 (SEM) 和能量散射X射线光谱 (EDS) 用于形态和组成.
- 福利埃变换红外光谱 (FTIR) 用于化学分析.
- 紫外线-Vis光谱检测光学属性 (吸收率,反射率,带隙).
- 折射率和直流电导度的测量.
主要成果:
- 观察到增强的紫外线吸收和反射率,高达24%的TPAI或THAI兴奋剂,表明适合UVA/UVB屏蔽.
- 光学带隙从初始值 (直接:5.1 eV,间接:4.8 eV) 显著降低到大约3.5 eV,盐含量增加.
- 含有24%重量TPAI的混合物显示了最高的折射率 (在400-800nm范围内约3.5).
- 电流导电性因盐含量,类型,分散和混合盐相互作用而异,激活能量通过阿雷尼乌斯公式来确定.
结论:
- 与TPAI和THAI盐合的PVA/PVP混合物在紫外线屏蔽应用中表现出有希望的光学性能.
- 盐剂有效地改变了聚合物混合物的光学带隙和折射率.
- 该研究提供了对盐化聚合物系统的结构性质关系的见解.
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