PPS composite membrane preparation based on aramid and glass fiber woven fabric support

Abstract

Polyphenylene sulfide@aramid fiber (PPS@AF) composite membrane was synthesized using the dip drawing method. This involved coating a PPS separating membrane over both sides of AF support via the thermally induced phase separation (TIPS) method. In order to overcome the drawbacks of a dense skin and limited flux, we explored the influence of PPS concentration in the casting solution on membrane morphology and PPS composite membrane performance. Compared to the 6.7 N of PPS membrane, the prepared composite membrane displayed a tensile strength up to 445 N. The pure water flux of PPS composite membrane can reach 888.15 L⋅m−2⋅h−1 ⋅bar−1, which is 20.7 times greater than that of PPS membrane. We also successfully developed a PPS composite membrane with superior mechanical properties which was uniformly coated by PPS membrane on both sides of a glass fiber woven fabric (GFWF) using the TIPS membrane scraping method. The ratio of Benzoin (BZ) and Benzophenone (DPK) in casting solution were adjusted to control the surface structure of composite membrane, which was systematically characterized. The results revealed that when the casting solution contained 25 % DPK, the composite membrane supported by GFWF reached a tensile strength of 207.84 N, 31 times stronger than that of PPS membrane. When the casting solution contained 10 % DPK, the pure water flux of PPS/GFWF microfiltration membrane was 75.3 L⋅m−2⋅h−1⋅bar−1, 1.75 times higher than that of PPS membrane.