文献类型：期刊文献

英文题名：Preparation and Characterization of a Novel Sulfonated Titanium Oxide Incorporated Chitosan Nanocomposite Membranes for Fuel Cell Application

作者：Ahmed, Saad[1,2,3];Arshad, Tasleem[3];Zada, Amir[4];Afzal, Annum[3];Khan, Muhammad[3];Hussain, Amjad[3];Hassan, Muhammad[3];Ali, Muhammad[1,2];Xu, Shiai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat, Shanghai 200237, Peoples R China;[2]Qinghai Univ, Sch Chem Engn, Xining 810016, Peoples R China;[3]Univ Okara, Dept Chem, Okara 56300, Pakistan;[4]Abdul Wali Khan Univ Mardan, Dept Chem, Mardan 23200, Pakistan

年份：2021

卷号：11

期号：6

外文期刊名：MEMBRANES

收录：;EI(收录号：20212710589753);WOS:【SCI-EXPANDED(收录号:WOS:000666753700001)】；

基金：This research is financially supported by the National Natural Science Foundation of China (51463020), Kunlun Scholar Award Program of Qinghai Province and Thousand Talents Program of Qinghai Province.

语种：英文

外文关键词：sulfonated TiO2; chitosan; nanocomposite membrane; proton exchange membrane fuel cell

摘要：In this study, nano-TiO2 sulfonated with 1,3-propane sultone (STiO2) was incorporated into the chitosan (CS) matrix for the preparation of CS/STiO2 nanocomposite membranes for fuel cell applications. The grafting of sulfonic acid (-SO3H) groups was confirmed by Fourier transform infrared spectroscopy, thermogravimetric analysis and energy-dispersive X-ray spectroscopy. The physicochemical properties of these prepared membranes, such as water uptake, swelling ratio, thermal and mechanical stability, ion exchange capacity and proton conductivity, were determined. The proton conducting groups on the surface of nano-TiO2 can form continuous proton conducting pathways along the CS/STiO2 interface and thus improve the proton conductivity of CS/STiO2 nanocomposite membranes. The CS/STiO2 nanocomposite membrane with 5 wt% of sulfonated TiO2 showed a proton conductivity (0.035 S center dot cm(-1)) equal to that of commercial Nafion 117 membrane (0.033 S center dot cm(-1)). The thermal and mechanical stability of the nanocomposite membranes were improved because the interfacial interaction between the -SO3H group of TiO2 and the -NH2 group of CS can restrict the mobility of CS chains to enhance the thermal and mechanical stability of the nanocomposite membranes. These CS/STiO2 nanocomposite membranes have promising applications in proton exchange membrane fuel cells.