精心定制的基于诺伯的化共聚物,用于调节恐冰性和机械强度
Guangzeng Luo1, Zhilu Gao1, Cuiping Zhou1
1School of Chemistry and Chemical Engineering, and Shandong Key Laboratory of Fluorine Chemistry and Chemical Engineering Materials, University of Jinan, Jinan 250022, China.
Langmuir : the ACS journal of surfaces and colloids
|May 23, 2024
概括
研究人员通过调整软硬分段,开发出强大的,厌冰的化聚烯烯共聚合物. 这些材料表现出可调节的机械性能和显著降低的冰粘度,克服了传统低模块恐冰表面的局限性.
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
- 表面科学是一门学科.
背景情况:
- 开发具有机械强度和可调节性质的恐冰表面至关重要.
- 现有的恐冰表面往往缺乏机械完整性或受到低模量限制.
- 了解分子结构与特性关系是先进材料设计的关键.
研究的目的:
- 设计和制造基于norbornene的新型化聚烯共聚合物 (FPOR-x).
- 研究结构与属性的关系,重点关注机械和恐冰特征.
- 通过控制软硬分段比率来实现强大的恐冰表面,具有可调节的特性.
主要方法:
- 通过活环开放元解聚合 (ROMP) 合成FPOR-x共聚合物.
- 使用的norbornenyl dodecafluoroheptyl ester (NDFHE) 作为软片段和norbornenyl pentafluorophenyl ester (NPFPE) 作为硬片段.
- 具有特征的机械性能 (拉伸强度,弹性模量,延长) 和冰剪强度.
主要成果:
- 实现了可调整的机械性能,拉力强度从0.2到26.4MPa,弹性模量从0.6到593.7MPa.
- 软NDFHE含量的比率与机械性能变化直接相关.
- FPOR-25%的冰切断强度低,为57.7kPa,拉力强度为12.0MPa,弹性模量为227.5MPa.
- 软块和硬块之间的协同作用影响了裂的传播,降低了冰的粘附力.
结论:
- 该研究成功地确定了聚合物分子结构与表面恐冰性能之间的联系.
- 开发的共聚合物为坚固的恐冰表面提供了一条途径,克服了以前材料的模量限制.
- 定制软硬细分比为设计先进的恐冰材料提供了一种多功能策略.
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