制造具有增强热稳定性的基于聚烯酸的聚氨
Jasna V Džunuzović1,2, Ivan S Stefanović2, Enis S Džunuzović3
1Center of Excellence in Environmental Chemistry and Engineering, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
Polymers
|July 13, 2024
概括
添加二氧化纳米粒子 (TiO2 NPs) 提高了聚氨 (PU) 的热稳定性. 用劳里尔酸盐对TiO2NP的表面修饰进一步改善了PUPU.
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
- 纳米技术纳米技术
背景情况:
- 聚氨 (PU) 是多功能聚合物,其应用受其热稳定性限制.
- 提高PU的热性能对于扩大其在苛刻环境中的使用至关重要.
- 二氧化纳米颗粒 (TiO2 NPs) 作为增强聚合物性能的添加剂正在被探索.
研究的目的:
- 研究将未经修改和表面修改的TiO2纳米颗粒纳入聚氨的效果.
- 评估TiO2纳米粒子分散对PU复合材料的热稳定性和降解行为的影响.
- 确定表面修饰在提高PU矩阵内TiO2NP的兼容性和性能方面的作用.
主要方法:
- 合成和特征的PU复合材料含有不同数量的未经修改和酸修改的TiO2纳米粒子.
- 显微镜 (SEM) 用于分散分析.
- 膨胀测试和物理性能评估的机械测试.
- 热重力测量分析 (TGA) 和衍生热重力测量 (DTG) 用于评估热稳定性.
- 应用无异形转换模型的方法来分析热降解动力学.
主要成果:
- 加入TiO2纳米颗粒显著提高了聚氨的热稳定性.
- 用劳里尔酸盐对TiO2NP的表面修改导致了更好的分散和更明显的热稳定性增强.
- 分析表明,修改后的TiO2NP优先分散在PU的软段,延迟了聚烯酸 (PCL) 的降解,并提高了PU的整体热性能.
- 动力分析证实了TiO2NP对PU的热稳定性和耐老化的积极影响.
结论:
- TiO2纳米颗粒有效提高聚氨的热稳定性.
- 对TiO2NP的表面修改是实现最佳分散和最大限度地提高热性能的关键.
- 该研究表明,开发用于先进应用的耐热聚氨材料是一种可行的策略.
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