The Preparation and Performance Study of Polyamide Film Based on PDA@MWCNTs/PVDF Porous Support Layer

Zhenzhen Xu; Quanjun Li; Xuzhi Sun; Jian Xing; Xinghua Hong; Feng Liu

doi:10.3390/molecules29071460

The Preparation and Performance Study of Polyamide Film Based on PDA@MWCNTs/PVDF Porous Support Layer

Molecules. 2024 Mar 25;29(7):1460. doi: 10.3390/molecules29071460.

Authors

Zhenzhen Xu¹, Quanjun Li¹, Xuzhi Sun¹, Jian Xing¹, Xinghua Hong², Feng Liu^{1

2

3}

Affiliations

¹ School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China.
² Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Hangzhou 310018, China.
³ Advanced Fiber Materials Engineering Research Center of Anhui Province, Anhui Polytechnic University, Wuhu 241000, China.

Abstract

It is urgent to develop a polyamide (PA) thin-film composite (TFC) membrane with a new method in this study by designing and constructing a new nanomaterial support layer instead of the conventional support layer. Polydopamine-wrapped single-walled carbon nanotubes (PDA@MWCNTs) as the place of the polymerization reaction can optimize the PA film structure and performance. The resulting composite membrane presents a higher water flux of 15.8 L·m^-2·h^-1·bar^-1 and a rejection rate of 97% to Na₂SO₄, simultaneously maintaining this high separation performance in 300 min. It is a new ideal to construct novel support layer by using inorganic nanoparticles and organic polymer nanofiber membranes.

Keywords: PA film; PDA@MWCNTs/PVDF support; permselectivity; stability.

Grants and funding

This research was supported by the National Natural Science Foundation of China (No. 52203114) and the Outstanding Young Talents Program of Anhui Province (gxgwfx2022018).