The enhancement of dye filtration performance and antifouling properties in amino-functionalized bentonite/polyvinylidene fluoride mixed matrix membranes

Edi Pramono; Khairul Umam; Fuja Sagita; Ozi Adi Saputra; Rifki Alfiansyah; Rahmi Sri Setyawati Dewi; Grandprix T M Kadja; Mia Ledyastuti; Deana Wahyuningrum; Cynthia L Radiman

doi:10.1016/j.heliyon.2023.e12823

The enhancement of dye filtration performance and antifouling properties in amino-functionalized bentonite/polyvinylidene fluoride mixed matrix membranes

Heliyon. 2023 Jan 5;9(1):e12823. doi: 10.1016/j.heliyon.2023.e12823. eCollection 2023 Jan.

Authors

Edi Pramono^{1

2}, Khairul Umam^{1

3}, Fuja Sagita¹, Ozi Adi Saputra², Rifki Alfiansyah¹, Rahmi Sri Setyawati Dewi¹, Grandprix T M Kadja^{1

4

5}, Mia Ledyastuti¹, Deana Wahyuningrum⁶, Cynthia L Radiman¹

Affiliations

¹ Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha no. 10, Bandung, 40132, Indonesia.
² Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami no. 36A, Surakarta, 57216, Indonesia.
³ Textile Chemistry Division, Politeknik STTT Bandung, Jl. Jakarta no. 31, Bandung, 40272, Indonesia.
⁴ Center for Catalysis and Reaction Engineering, Institut Teknologi Bandung, Jalan Ganesha no. 10, Bandung, 40132, Indonesia.
⁵ Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha no. 10, Bandung, 40132, Indonesia.
⁶ Organic Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha no. 10, Bandung, 40132, Indonesia.

Abstract

Trade-off issue and membrane fouling remain two major issues in the utilization of membrane technology for the water treatment due to reduced membrane permeability and lifetime. In our study, we employed 3-aminopropyltriethoxysilane modified bentonite (BNTAPS) as an anti-fouling modifier to prepare polyvinylidene fluoride (PVDF)-based membranes via the phase inversion method. The effects of BNTAPS concentration on the physical, mechanical, morphological, and filtration performance of the hybrid membranes have been investigated. It was found that the addition of BNTAPS improved the hydrophilicity of the membrane revealed by the decreased water contact angle. Consequently, the pure water flux of PVDF membrane containing 0.5% BNTAPS (PVDF/BNTAPS0.5%) increased to 35.5 L m^-2 h^-1. Moreover, the PVDF/BNTAPS membrane showed a smaller pore diameter and porosity compared to pristine PVDF. The membrane performance evaluation was carried out using cationic and anionic dyes, i.e., methylene blue (MB) and acid yellow (AY17), respectively. Our study revealed that the rejection of each dye was slightly increased for the PVDF/BNTAPS0.5%. However, the flux recovery rate of the PVDF/BNTAPS membrane significantly improved, which directly prolonged the membrane lifetime.

Keywords: Acid yellow; Methylene blue; PVDF; Silylation; Water treatment.