Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (09): 16-20.doi: 10.13475/j.fzxb.20190904105

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of high strength polyvinyl chloride hollow fiber membrane

MEI Shuo1(), LI Jinchao2, LU Shiyan1, XIAO Changfa3, YANG Yong1, FENG Xiangwei2   

  1. 1. School of Textiles, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China
    2. School of Textiles, Henan University of Engineering, Zhengzhou, Henan 451191, China
    3. State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China
  • Received:2019-09-16 Revised:2020-06-08 Online:2020-09-15 Published:2020-09-25

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Abstract:

In order to solve the problem of hard synchronous increase strength and permeability of polyvinyl chloride (PVC) membrane obtained by solution phase inversion method, high performance of PVC hollow fiber membranes were prepared using the screw extrusion spinning method, with MT-I composite powder as pore-forming agent and dioctyl phthalate as diluent. The influences of heat setting ratio and extraction on morphology and structure of fiber membrane were investigated. Separation performance and mechanical properties of fiber membranes were characterized by pure water flux, rejection of carbon ink and tensile strength. Results show that as the stretching ratio increased, the tensile strength of the membrane increases and elongation at break decreases. After ethanol extraction, more micro pores appear on the surface of the membrane which improves the permeability of the membrane. The membrane with stretching ratio 3 after ethanol extraction exhibits a larger permeability with pure water flux of 798 L/(m2·h), and a better performance with tensile strength of 17.7 MPa and elongation at break of 70.67%.

Key words: polyvinyl chloride, screw extrusion spinning method, hollow fiber membrane, separation membrane, water treatment, rejection ratio

CLC Number: 

  • TB324

Fig.1

Scheme of screw extrusion spinning PVC hollow fiber membrance apparatus"

Fig.2

FT-IR spectra of PVC and PVC/DOP primary hollow fiber membrane"

Tab.1

Effect of DOP on A1 427/A1 435 of PVC hollow fiber membrane"

纤维膜 A1 427 A1 435 A1 427/A1 435
纯PVC纤维膜 0.024 80 0.023 47 1.056 70
PVC/DOP初生纤维膜 0.032 02 0.026 67 1.201 00

Fig.3

Cross section images of PVC/DOP hollow fiber membrane under different heat setting ratio. (a)1 time;(b)2 times;(c)3 times"

Fig.4

Cross section images of PVC hollow fiber membrane before(a)and after(b)DOP extraction"

Fig.5

Water flux and rejection rate of PVC/DOP hollow fiber membrane under different heat setting ratio"

Fig.6

Water flux and rejection rate of PVC hollow fiber membrane after DOP extraction"

Fig.7

Mechanical properties of PVC/DOP primary hollow fiber membrane(a)and PVC hollow fiber membrane(b) at different heat setting ratio"

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