Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate,Journal of Polymer Science Part A: Polymer Chemistry

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Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate
Journal of Polymer Science Part A: Polymer Chemistry Pub Date : 2019-10-16 , DOI: 10.1002/pola.29509
Qi Zhao ₁ , Yingcong Wei ₂ , Chuangjiang Ni ₁ , Yumei Zhang ₁ , Baijun Liu ₃ , Zhaoyan Sun ₄ , Haiming Xie ₅ , Wei Hu ₁ , Liang Liang ₆

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Study on proton exchange membrane (PEM) with the aim toward excellent battery performance of PEM for fuel cells has attracted increasing attention. In this work, nanocellulose (CNC) aminated by KH792 noted as NN was prepared. CNC or NN/sulfophenylated poly(ether ether ketone ketone) (sPEEKK) nanocomposite membrane (SN) or (SNN) were produced by solution mixing. SNN was further coated with tetraethyl orthosilicate (TEOS) to obtain SNNT. The properties of sPEEKK, SN, SNN, and SNNT membranes were thoroughly investigated. The proton conductivity of SN4 was 0.22 S·cm⁻¹ at 90 °C, while a proton conductivity of 0.30 S·cm⁻¹ was obtained for SNN4, and an even higher value of 0.36 S·cm⁻¹ at 90 °C was obtained for the TEOS‐coated SNN4 (SNN4T). Meanwhile, SNN4T showed high thermal stability, and its T_d5 was as high as 318.2 °C. Furthermore, the composite membrane coated with TEOS also presented excellent oxidative stability. The mass of SNN2T after treated in Fenton agent for 1 h at 80 °C was still retained 96.2%, and it was not fully dissolved until 11 h. It was illustrated that aminated CNC/sPEEKK nanocomposite membranes coated with TEOS is a kind of promising materials as PEMs for fuel cells. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2190–2200

中文翻译：

原硅酸四乙酯包覆的纳米纤维素增强质子交换纳米复合膜的性能改进

旨在实现用于燃料电池的PEM的优异电池性能的质子交换膜（PEM）的研究引起了越来越多的关注。在这项工作中，制备了由KH792胺化的纳米纤维素（CNC），记为NN。通过溶液混合制备CNC或NN /磺基苯基化聚醚醚酮酮（sPEEKK）纳米复合膜（SN）或（SNN）。SNN进一步用原硅酸四乙酯（TEOS）涂覆以获得SNNT。彻底研究了sPEEKK，SN，SNN和SNNT膜的特性。SN4的质子传导率在90°C下为0.22 S·cm ^-1，而SNN4的质子传导率为0.30 S·cm ^-1，甚至更高的值为0.36 S·cm ^-1使用TEOS涂层的SNN4（SNN4T）在90°C的温度下获得。同时，SNN4T具有较高的热稳定性，其T _d5高达318.2°C。此外，涂有TEOS的复合膜还具有出色的氧化稳定性。在Fenton试剂中于80°C处理1 h后，SNN2T的质量仍保留96.2％，直到11 h才完全溶解。结果表明，涂有TEOS的胺化CNC / sPEEKK纳米复合膜是一种有前途的材料，可作为燃料电池的PEM。分级为4 +©2019 Wiley Periodicals，Inc.J.Polym。科学，A部分：Polym。化学 2019，57，2190–2200

更新日期：2019-10-16

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