Citation: Ming-xing Chen, Chang-fa Xiao, Chun Wang, Hai-liang Liu. Studies on Structure and Properties of Poly(m-phenylene isophthalamide) Hollow Fiber Membranes[J]. Acta Polymerica Sinica, ;2016, (4): 428-435. doi: 10.11777/j.issn1000-3304.2016.15223 shu

Studies on Structure and Properties of Poly(m-phenylene isophthalamide) Hollow Fiber Membranes

1.
State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387

Corresponding author: Chang-fa Xiao, xiaochangfa@163.com
Received Date: 17 August 2015
Revised Date: 14 October 2015

The aromatic poly(m-phenylene isophthalamide)(PMIA) hollow fiber membranes with polyethylene glycol (PEG), LiCl and CaCl2 as additives were fabricated by dry-wet spinning technology. The effects of adding amount of PEG in the casting solution during membrane fabrication on the performance of the PMIA hollow fiber membranes were investigated. Membrane characterization was conducted through pure water flux, porosity, contact angle, mechanical strength, thermogravimetric analysis (TGA), rejection rate and the flux of hot water. The SEM results indicated that the cross section of the hollow fiber membrane had an asymmetrical structure that consisted of a dense outer surface acting as a selectively layer, a spongy-like transition layer, and finger-like microvoids close to the inner and outer surface. The addition of PEG in casting solution can significantly improve the water flux of PMIA hollow fiber membranes, however when the adding amount of PEG increased to a certain degree, the water flux of the PMIA membranes showed a downward trend; PMIA hollow fiber membranes showed good rejection performance for BSA solution, the rejection rate can reach 92%; the addition of PEG can improve the PMIA membranes' hydrophilicity, the contact angle decreased from 51 to 44; the maximum number of tensile strength can reach to 5.8 MPa. Finally the resistance performance of PMIA membranes to heat water and alkali solution was investigated. The results showed that the PMIA hollow fiber membranes have a good resistance of hot water and alkali solution.
- Poly(m-phenylene isophthalamide),
- Hollow fiber membrane,
- PEG,
- Hot water,
- Resistance of alkali solution
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1.
沈阳化工大学材料科学与工程学院沈阳 110142