用核磁共振揭示多孔联苯基编织芳基聚合物（K2Ph）在PPO和PC膜中的气体分布、分子相互作用及其对气体输运的影响

IF 4.5 2区化学 Q2 POLYMER SCIENCE

Polymer Pub Date : 2025-09-15 DOI:10.1016/j.polymer.2025.129097

Mar López-González , Nastasia Yuriychuk , Esperanza Benito , Eva M. Maya , Leoncio Garrido

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引用次数: 0

摘要

采用核磁共振波谱结合脉冲梯度自旋回波（PGSE）核磁共振，在分子尺度上研究了以多孔联苯基编织芳基聚合物（K2Ph）为填料的聚（2,6-二甲基-对苯乙烯氧化物）（PPO）和聚[碳酸双酚A -co-4,4 ' -（3,3,5-三甲基环己基）碳酸二酚]（PC）混合基质膜（MMMs）中纯CO2和混合CO2和CH4的相互作用和传输。吸附气体的T1s弛豫时间和化学位移测量结果表明，在与聚合物相和填料相相关的mm中存在两个种群。类似地，气体扩散测量的分析导致两种成分，快速和缓慢暂时分别分配给mmmm中的填料和聚合物相。将核磁共振结果与独立的总透气性测量结果进行比较，有助于揭示具有多孔K2Ph的玻璃状PPO和PC膜中的气体输送机制。

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Unveiling the distribution and molecular interactions of gases in membranes of PPO and PC with porous biphenyl-based knitting aryl polymer (K2Ph) and their influence on gas transport with NMR

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Unveiling the distribution and molecular interactions of gases in membranes of PPO and PC with porous biphenyl-based knitting aryl polymer (K2Ph) and their influence on gas transport with NMR

NMR spectroscopy combined with pulsed gradient spin-echo (PGSE) NMR are used to study, at the molecular scale, the interactions and transport of pure and mixed CO₂ and CH₄ in mixed matrix membranes (MMMs) of poly(2,6-dimethyl-p-phenylene oxide) (PPO) and poly[bisphenol A carbonate-co-4,4’-(3,3,5-trimethylcyclohexylidene) diphenol carbonate] (PC) with porous biphenyl-based knitting aryl polymer (K2Ph) as filler. The results of T₁s relaxation times and chemical shifts measurements of the sorbed gases show two populations in the MMMs associated with the polymer and filler phases. Similarly, the analysis of the gases diffusion measurements leads to two components, fast and slow tentatively assigned to the filler and polymer phases in the MMMs, respectively. The comparison of NMR results with independent measurements of total gas permeability contributes to unveil the mechanisms of gas transport in membranes of glassy PPO and PC with porous K2Ph.

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来源期刊

Polymer 化学-高分子科学

CiteScore

7.90

自引率

8.70%

发文量

959

审稿时长

32 days

期刊介绍： Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.