Effect of Stretching Parameters on Structure and Properties of Polytetrafluoroethylene Hollow-Fiber Membranes

2016 ◽  
Vol 39 (5) ◽  
pp. 935-944 ◽  
Author(s):  
Jingxuan Jia ◽  
Guodong Kang ◽  
Yiming Cao
Keyword(s):  
Hollow Fiber ◽  
Structure And Properties ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Effects of post-treatment on the structure and properties of PVDF/FEP blend hollow fiber membranes

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 77407-77416 ◽  
Author(s):  
Qing-lin Huang ◽  
Yan-jie Wu ◽  
Chang-fa Xiao ◽  
Kai-kai Chen ◽  
Liang Song ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Polyvinylidene Fluoride ◽  
Melt Spinning ◽  
Post Treatment ◽  
Structure And Properties ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

Polyvinylidene fluoride (PVDF)/poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) blend hollow fiber membranes were prepared by the melt-spinning method.

Effects of annealing stress field on the structure and properties of polypropylene hollow fiber membranes made by stretching

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4271-4279 ◽  
Author(s):  
Huiju Shao ◽  
Fujian Wei ◽  
Bin Wu ◽  
KaiZhou Zhang ◽  
Yong Yao ◽  
...  
Keyword(s):  
Stress Field ◽  
Microstructural Evolution ◽  
Hollow Fiber ◽  
Melt Spinning ◽  
Stress Fields ◽  
Structure And Properties ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes ◽  
Spinning Process

By adopting three types of annealing stress fields, this work focused on investigating their effects on the microstructural evolution of polypropylene (PP) hollow fiber precursors obtained by the melt spinning process.

scholarly journals EFFECT OF COAGULATION CONDITIONS ON STRUCTURE AND PROPERTIES OF α-CELLULOSE HOLLOW FIBER MEMBRANES

2009 ◽  
Vol 007 (3) ◽  
pp. 250-254
Author(s):  
Hongjian LI ◽  
Xiongyan LI ◽  
Xiaoquan HE ◽  
Xuemei LI ◽  
Yiming CAO ◽  
...  
Keyword(s):  
Hollow Fiber ◽  
Structure And Properties ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes

scholarly journals Pore Structure and Properties of PEEK Hollow Fiber Membranes: Influence of the Phase Structure Evolution of PEEK/PEI Composite

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1398 ◽  
Author(s):  
Gong Chen ◽  
Yuan Chen ◽  
Tingjian Huang ◽  
Zhongchen He ◽  
Jianjun Xu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hollow Fiber ◽  
Phase Structure ◽  
Annealing Temperature ◽  
Hollow Fiber Membrane ◽  
Structure Evolution ◽  
Structure And Properties ◽  
Hollow Fiber Membranes ◽  
Fiber Membrane ◽  
Fiber Membranes

Poly(ether ether ketone) (PEEK) hollow fiber membranes were successfully prepared from miscible blends of PEEK and polyetherimide (PEI) via thermally-induced phase separation (TIPS) with subsequent extraction of the PEI diluent. The phase structure evolution, extraction kinetics, membrane morphology, pore size distribution and permeability for the hollow fiber membrane were studied in detail. Extraction experiments, differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMA) studies showed that the heat treatment had a significant influence on the two-phase structure of PEEK/PEI, and that it was controlled by the crystallization kinetic of PEEK and the diffusion kinetic of PEI. As the annealing temperature increased, the controlling factor of the phase separation changed from PEEK crystallization to PEI diffusion, and the main distribution of the amorphous PEI chains were changed from the interlamellar region to the interfibrillar or interspherulitic regions of PEEK crystallization. When the annealing temperature increased from 240 °C to 280 °C, the extracted amount of PEI increased from 85.19 to 96.24 wt %, and the pore diameter of PEEK membrane increased from 10.59 to 37.85 nm, while the surface area of the PEEK membrane decreased from 111.9 to 83.69 m2/g. Moreover, the water flux of the PEEK hollow fiber membranes increased from 1.91 × 10−2 to 1.65 × 10−1 L h−1 m−2 bar−1 as the annealing temperature increased from 240 °C to 270 °C. The structure and properties of the PEEK hollow fiber membrane can be effectively controlled by regulating heat treatment conditions.

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