PDMS/PVDF microporous membrane with semi‐interpenetrating polymer networks for vacuum membrane distillation

Abstract

In this article, using the non‐solvent induced phase separation process, a new microporous membrane with the semi‐interpenetrating polymer network (semi‐IPN) structure was produced. For this membrane, polydimethylsiloxane (PDMS) polymer is crosslinking and poly(vinylidene fluoride) (PVDF) polymer is linear, by changing the mass ratio of PDMS/PVDF, the structure and the performance of the prepared membranes were studied. The membranes were also investigated by attenuated total reflection‐Fourier transform infrared (ATR‐FTIR), scanning electron microscopy–energy‐dispersive X‐ray spectroscopy, X‐ray diffraction, thermogravimetric analysis, and water contact angle, etc. ATR‐FTIR spectroscopy confirmed the formation of semi‐IPN; compared with the PDMS/PVDF polymer without semi‐IPNs structure, the viscosity of the semi‐IPNs structured casting solution increased, membrane mechanical property increased but its hydrophobicity decreased. Using the resulting membranes for the vacuum membrane distillation desalt of the NaCl solution (30 g/L), 99.9% salt rejection and reasonable flux were obtained. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45792.

Enhanced sensing performance of flexible strain sensors prepared from biaxially stretched carbon nanotubes/polydimethylsiloxane nanocomposites

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Designing and Preparation of Fiber-Reinforced Composites with Enhanced Interface Adhesion

“…The decreasing of the modulus can be explained with the fact that the thermoplastic polymer PEN acts as the plasticizer which will reduce the interaction between the rigid crosslinking networks. Then, the flexural modulus increases with the PEN content increased, this is due to the copolymerization of BA-ph and PEN that forms the semi-interpenetrating polymer networks [34]. In the discussion of DSC and DRA, the results also indicate that the copolymerization occurred between BA-ph and PEN when the content of PEN over to 20 wt %.…”

Interpenetrating polymer networks for desalination and water remediation: a comprehensive review of research trends and prospects

“…The semi-IPN membranes demonstrated 99.9% desalting of NaCl solution (30 g L −1 ) and the performance was compared to that of the reported systems. 68 To improve the permselectivity and antifouling characteristic of conventional RO membrane, Wang et al developed a Semi-IPN based on polyamide (PA) and poly (N-vinyl-2pyrrolidone) (PVP). The modied membrane with optimal (0.5-10s-NVP) amount showed 43.2% and 0.2% increments in water ux and salt rejection, respectively.…”

“…The semi-IPN membranes demonstrated 99.9% desalting of NaCl solution (30 g L −1 ) and the performance was compared to that of the reported systems. 68 …”