高分子阶梯状多基基酸的蒸发和气体分离特性
Tatiana S Anokhina1, Tatyana O Ershova2,3, Anton A Anisimov2,3,4
1V. Topchiev Institute of Petrochemical Synthesis RAS, 119991 Moscow, Russia.
Polymers
|August 12, 2023
概括
这项研究合成了具有高分子量的梯子状聚二酸 (L-PPSQ),证明了高级膜应用的卓越热稳定性和机械性能.
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
- 分离技术 分离技术
背景情况:
- 阶梯状聚二酸 (L-PPSQ) 是先进的聚合物,具有基于膜的分离潜力.
- 开发具有增强性能的L-PPSQ对于提高分离效率和膜耐用性至关重要.
研究的目的:
- 合成具有改善物理和化学特性的新型梯子状聚二素 (L-PPSQ).
- 为了评估合成的L-PPSQ对各种混合物的蒸发和气体透气性质.
- 确认聚合物结构并评估其热和机械稳定性.
主要方法:
- 通过对cis-tetraphenylcyclotetrasiloxanetetraol的凝结合成L-PPSQ.
- 使用1H,29Si NMR,IR光谱,HPLC,粉末XRD,粘度测量,TGA和机械分析进行表征.
- /混合物的蒸发和多种气体 (He,H2,N2,O2,CO2,CH4,C2H6,C4H10) 的气体透性测试.
主要成果:
- 获得了高分子量L-PPSQ (Mn = 238 kDa,Mw = 540 kDa) 具有出色的热稳定性 (Td5% = 537 °C,氧化Td5% = 587 °C).
- 证明了良好的机械性能 (E = 1700 MPa, σ = 44 MPa, ε = 6%).
- 在10%的重量中表现出126的高分离系数. 在n-hexane中通过蒸发.
结论:
- 合成的L-PPSQ具有卓越的热和机械性能,适合苛刻的膜应用.
- 该聚合物在蒸发中的高性能表明了工业分离过程的巨大潜力.
- 这项研究为开发用于液体和气体分离的高性能膜提供了有前途的新材料.
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