Structure and Performance of Poly(vinylidene chloride‐co‐vinyl chloride) Porous Membranes with Different Additives

Abstract

Poly(vinylidene chloride‐co‐vinyl chloride) (P(VDC‐co‐VC) membranes were prepared by non‐solvent‐induced phase separation and adjusted by adding water‐soluble polyethylene glycol (PEG) and water‐insoluble silicon dioxide (SiO2) hydrophilic nanoparticles. The structure of pores and antifouling performance were investigated to illustrate the effect of these nanoparticles. The cross section of the P(VDC‐co‐VC) membrane exhibited more macropores and the typical finger‐like pores turned into more vertically interconnected ones with increasing PEG content, while the number and size of finger‐like pores became less with increasing SiO2 content. Considering the filtration and antifouling experiments, the presence of hydrophilic PEG and SiO2 nanoparticles in the P(VDC‐co‐VC) polymer matrix improved the membrane performance in terms of high flux, high BSA rejection ratio, and fouling resistance.

Development of Hydrophilic PVDF Membrane Using Vapour Induced Phase Separation Method for Produced Water Treatment

“…The PEG as additives in the PVDF-based membrane acts more likely as a pores promoter rather than residing as a hydrophilic protective layer on the membrane surface towards oily wastewater. When loaded in the dope solution, like PVP [15], PEG leaches out from the membrane matrix when casted polymer membrane was immersed in the coagulation bath [16][17][18][19]. The leaching of PEG from the membrane matrix assists in the formation of a highly porous membrane.…”

Transparent and flame retardant vinylidene chloride‐methyl acrylate hybrid films with enhanced water vapor barrier, thermostability, and anti‐glare properties

“…To guarantee the performance of FOLEDs, the transparency, thermal stability, and flame retardance of barrier materials should be considered 2,3 . Vinylidene chloride (VDC) copolymers with symmetrical chemical structure and high crystal degree possess excellent barrier properties, chemical resistance, flame retardance, and so forth 4,5 . However, the thermal stability of VDC copolymers are restricted when applied in the encapsulation of FOLEDs and other electronics.…”