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Preparation of Polyvinyl Alcohol (PVA)-Based Composite Membranes Using Carboxyl-Type Boronic Acid Copolymers for Alkaline Diffusion Dialysis by Peng, Lizhen; Huang, Xiaonan; Liu, Dandan; Miao, Jibin; Wu, Bin; Cao, Ming; Ge, Qianqian; Yang, Bin; Su, Lifen; Xia, Ru; Zheng, Zhengzhi; Chen, Peng; Qian, Jiasheng is a Materials Science article available to read on EtoBox.
What is Preparation of Polyvinyl Alcohol (PVA)-Based Composite Membranes Using Carboxyl-Type Boronic Acid Copolymers for Alkaline Diffusion Dialysis about?
Carboxyl-type boronic acid copolymers (CBACs) were synthesized by a radical polymerization method and used for the preparation of polyvinyl alcohol (PVA)-based composite membranes via a solution mixture method. The as-prepared composite membranes exhibited a water uptake (WR) of 122.6–150.0%, an ion exchange capacity (IEC) of 0.0147–0.0518 mmol g−1, and excellent mechanical (elongation at break (Eb) of 103.8–148.4%, tensile strength (TS) of 38.7–58.6 MPa) and thermal stability. The alkali resistances of the as-prepared membranes were tested by immersing the samples into 2 mol L−1 NaOH solutions at 25 °C for 60 h, and the results were encouraging: the mass loss and swelling degree of the as-prepared membranes were in the ranges of 1.9–5.9% and 222.6–241.9%, respectively. The separation performances of the as-prepared membranes were evaluated by the diffusion dialysis (DD) process with an NaOH/Na2WO4 mixture at room temperature. The results demonstrated that the dialysis coefficients of hydroxide (UOH) were in the range of 0.0147–0.0347 m h−1, and the separation factors (S) were in the range of 29.5–62.6. The introduced carboxyl groups from CBACs and the –OH groups from PVA were both
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- Author
- Peng, Lizhen; Huang, Xiaonan; Liu, Dandan; Miao, Jibin; Wu, Bin; Cao, Ming; Ge, Qianqian; Yang, Bin; Su, Lifen; Xia, Ru; Zheng, Zhengzhi; Chen, Peng; Qian, Jiasheng
- Publisher
- MDPI AG; MDPI Open Access Publishing; Basel: Molecular Diversity Preservation International (MDPI), 2009- (ISSN 2073-4360)
- Published
- 2020
- Language
- EN
- Field
- Materials Science (Physical Sciences)