Shan Wang, Abdellah Ajji, Shaoyun Guo and Chuanxi Xiong
Article (2017)
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Open Access to the full text of this document Published Version Terms of Use: Creative Commons Attribution Download (893kB) |
Abstract
In this work, a blending strategy based on compounding the hydrophilic titanium dioxide (TiO₂) particles with the host polypropylene (PP) pellets, followed by the common membrane manufacture process of melt extruding/annealing/stretching, was used to improve the polarity and thus electrolyte uptake capability of the PP-based microporous membranes. The influence of the TiO₂ particles on the crystallinity and crystalline orientation of the PP matrix was studied using differential scanning calorimetry (DSC), X-ray diffraction (XRD), and infrared dichroic methods. The results showed that the TiO₂ incorporation has little influence on the oriented lamellar structure of the PP-based composite films. Investigations of the deformation behavior indicated that both the lamellar separation and interfacial debonding occurred when the PP/TiO₂ composite films were subjected to uniaxial tensile stress. The scanning electron microscopy (SEM) observations verified that two forms of micropores were generated in the stretched PP/TiO₂ composite membranes. Compared to the virgin PP membrane, the PP/TiO₂ composite membranes especially at high TiO₂ loadings showed significant improvements in terms of water vapor permeability, polarity, and electrolyte uptake capability. The electrolyte uptake of the PP/TiO₂ composite membrane with 40 wt % TiO₂ was 104%, which had almost doubled compared with that of the virgin PP membrane.
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Department: | Department of Chemical Engineering |
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Research Center: | CREPEC - Center for Applied Research on Polymers and Composites |
Funders: | National Science Foundation of China, Chinese Scholarship Council (CSC). |
Grant number: | 1673154 |
PolyPublie URL: | https://publications.polymtl.ca/5164/ |
Journal Title: | Polymers (vol. 9, no. 3) |
Publisher: | MDPI |
DOI: | 10.3390/polym9030110 |
Official URL: | https://doi.org/10.3390/polym9030110 |
Date Deposited: | 16 May 2022 16:34 |
Last Modified: | 07 Apr 2025 13:25 |
Cite in APA 7: | Wang, S., Ajji, A., Guo, S., & Xiong, C. (2017). Preparation of microporous polypropylene/titanium dioxide composite membranes with enhanced electrolyte uptake capability via melt extruding and stretching. Polymers, 9(3), 110. https://doi.org/10.3390/polym9030110 |
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