Improvement of antifouling performance of poly(l‐lactic acid) membranes through incorporating polyaniline nanoparticles

Bin Jiang, Baoyu Wang, Luhong Zhang, Yongli Sun, Xiaoming Xiao, Na Yang, Haozhen Dou

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China

ABSTRACT

Poly(L-lactic acid) (PLLA) composite membranes were fabricated by nonsolvent induced phase separation method using polyaniline (PANI) as an additive. Membrane structure was characterized by attenuated total reflectance Fourier transform-infrared spectroscopy, X-ray diffraction, scanning electron microscopy, porosity, and pore size analysis. Membrane performance was assessed by goniometer, pure water flux, molecular weight cut-off, static adsorption and dynamic filtration. The incorporation of PANI significantly improved the hydrophilicity and permeability of PLLA composite membrane, and eventually enhanced the antifouling performance of composite membrane compared with pure PLLA membrane. It was demonstrated that PLLA composite membrane with 1 wt % PANI had better separation and antifouling performance compared with other composite membranes.

KEYWORDS

biopolymers and renewable polymers; membranes; separation techniques

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