Scholarlink

<p>New series of proton-conducting polymer composite membranes were fabricated by impregnating a cobalt metal–organic framework (Co-MOF) into a sulfonated polyethersulfone/poly(vinyl alcohol) (SPES/PVA) blend matrix. Post-sulfonation technique is used to sulfonate polyethersulfone using chlorosulfonic acid as a sulfonating agent. The presence of hydrophilic functional moieties in SPES and PVA contributes to the intrinsic water uptake (20.03%) and ion-exchange capacity (<i>IEC</i>, 0.22 meq g⁻¹) of the pristine SPES/PVA membrane. Incorporation of Co-MOF into the polymer matrix significantly enhanced the physicochemical properties of the composite membranes, leading to an increase in water uptake from 20.03 to 32.28% and <i>IEC</i> from 0.22 to 0.71 meq g⁻¹. A similar trend was observed in the proton conductivity measurements, with the SPES/PVA membrane containing 15 wt% Co-MOF exhibiting a maximum proton conductivity of 0.045&#xa0;S/cm, compared to 0.025&#xa0;S/cm for the pristine membrane. The porous architecture of the Co-MOF and its synergistic interaction with the ionic functional groups of SPES/PVA matrix assist to enhance the physicochemical and electrochemical performances, which together facilitate an efficient proton transport mechanism in fuel cell.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Performance enhancement of sulfonated polyether sulfone/poly (vinyl alcohol) blend membranes via cobalt metal–organic framework for fuel cells

  • 期刊论文

  • 发表日期：

    2026年6月3日

查看全文
  • Preethi Dayalan,
  • Ragasudha Sudhakaran,
  • Gandhimathi Sivasubramanian,
  • Arulmurugan Tamilarasan,
  • Siva Moorthy,
  • Paradesi Deivanayagam

摘要

New series of proton-conducting polymer composite membranes were fabricated by impregnating a cobalt metal–organic framework (Co-MOF) into a sulfonated polyethersulfone/poly(vinyl alcohol) (SPES/PVA) blend matrix. Post-sulfonation technique is used to sulfonate polyethersulfone using chlorosulfonic acid as a sulfonating agent. The presence of hydrophilic functional moieties in SPES and PVA contributes to the intrinsic water uptake (20.03%) and ion-exchange capacity (IEC, 0.22 meq g⁻¹) of the pristine SPES/PVA membrane. Incorporation of Co-MOF into the polymer matrix significantly enhanced the physicochemical properties of the composite membranes, leading to an increase in water uptake from 20.03 to 32.28% and IEC from 0.22 to 0.71 meq g⁻¹. A similar trend was observed in the proton conductivity measurements, with the SPES/PVA membrane containing 15 wt% Co-MOF exhibiting a maximum proton conductivity of 0.045 S/cm, compared to 0.025 S/cm for the pristine membrane. The porous architecture of the Co-MOF and its synergistic interaction with the ionic functional groups of SPES/PVA matrix assist to enhance the physicochemical and electrochemical performances, which together facilitate an efficient proton transport mechanism in fuel cell.