Membrane Science and Technology

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Determination of gelation temperature for Polyvinylidene Fluoride (PVDF) solution by viscosity measurement

Authors： Yong Yin, Xuemei Li, Tao He*

Units： 1State-Key Lab of Material Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009

KeyWords： PVDF; viscosity measurement; gelation temperature; thermodynamics

ClassificationCode：TQ050.4+25;TQ028.8

year,volume(issue):pagination： 2011, 31(5):40-45

Abstract：

The gelation temperature of PVDF/DMAc/DEG ternary solution was determined by viscosity measurement. The effect of the shear rate, PVDF concentration, approaching value and aging time were investigated. Results indicated that the gelation temperature is not related to the shear rate, however increases with PVDF concentration, approaching value and aging time. The new method in determination of gelation temperature is simple, accurate for investigating polymer solution thermodynamic

Funds：

科学技术部中小企业创新基金(No.08C26223201857), 国家重大基础研究973项目(No.2009CB623402),材料化学工程国家重点实验室基金(NoZK200804),自然科学基金No. 20976083

AuthorIntro：

殷勇（1984-）,女,河南南阳人,硕士研究生,主要从事有机高分子膜制备和应用的研究.( yinan1984@126.com).

Reference：

[1] Shah D, Maiti P, Gunn E, et al. Dramatic Enhancements in Toughness of Polyvinylidene Fluoride Nanocomposites via Nanoclay-Directed Crystal Structure and Morphology [J]. Advanced Materials 2004, 16 (14): 1173-1177.
[2] Mal S,Maiti P,Nandi A K. On the Gelation Rates of Thermoreversible Poly(vinylidene fluoride) Gels [J]. Macromolecules 1995, 28 (7): 2371-2376.
[3] Mulder M. 膜技术基本原理(第二版) [M]. 李琳.北京: 清华大学出版社, 1999.
[4] Soh Y S,Kim J H,Gryte C C. Phase behaviour of polymer/solvent/nonsolvent systems [J]. Polymer 1995, 36 (19): 3711-3717.
[5] Cheng L P, Lin D J, Shih C H, et al. PVDF membrane formation by diffusion-induced phase separation-morphology prediction based on phase behavior and mass transfer modeling [J]. Journal of Polymer Science Part B: Polymer Physics 1999, 37 (16): 2079-2092.
[6] Cho J W,Song H Y,Kim S Y. Thermoreversible gelation of poly(vinylidene fluoride) in [gamma]- butyrolactone solution [J]. Polymer 1993, 34 (5): 1024-1027.
[7] Cha B J,Yang J M. Preparation of poly(vinylidene fluoride) hollow fiber membranes for microfiltration using modified TIPS process [J]. Journal of Membrane Science 2007, 291 (1-2): 191-198.
[8] Cheng L P. Effect of Temperature on the Formation of Microporous PVDF Membranes by Precipitation from 1-Octanol/DMF/PVDF and Water/DMF/PVDF Systems [J]. Macromolecules 1999, 32 (20): 6668-6674.
[9] Lin D J,Chang C L,Chen T C, et al. Microporous PVDF membrane formation by immersion precipitation from water/TEP/PVDF system [J]. Desalination 2002, 145 (1-3): 25-29.
[10] Young T H,Cheng L P,Lin D J, et al. Mechanisms of PVDF membrane formation by immersion precipitation in soft (1-octanol) and harsh (water) nonsolvents [J]. Polymer 1999, 40 (19): 5315-5323.
[11] Lin D J,Chang H H,Chen T C, et al. Formation of porous poly(vinylidene fluoride) membranes with symmetric or asymmetric morphology by immersion precipitation in the water/TEP/PVDF system [J]. European Polymer Journal 2006, 42 (7): 1581-1594.
[12] Gu M,Zhang J,Wang X, et al. Formation of poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation [J]. Desalination 2006, 192 (1-3): 160-167.
[13] Shi L,Wang R,Cao Y, et al. Effect of additives on the fabrication of poly(vinylidenefluoride -co-hexafluropropylene) (PVDF-HFP) asymmetric microporous hollow fiber membranes [J]. Journal of Membrane Science 2008, 315 (1-2): 195-204.
[14] Shi L,Wang R,Cao Y, et al. Fabrication of poly(vinylidenefluoride-co-hexafluropropylene) (PVDF-HFP) asymmetric microporous hollow fiber membranes [J]. Journal of Membrane Science 2007, 305 (1-2): 215-225.
[15] Yeow M L,Liu Y T.Li K. Isothermal phase diagrams and phase-inversion behavior of poly(vinylidene fluoride)/solvents/additives/water systems [J]. Journal of Applied Polymer Science 2003, 90 (8): 2150-2155.
[16] Tazaki M,Wada R,Abe M O, et al. Crystallization and gelation of poly(vinylidene fluoride) in organic solvents [J]. Journal of Applied Polymer Science 1997, 65 (8): 1517-1524.
[17] He T. Towards stabilization of supported liquid membranes: preparation and characterization of polysulfone support and sulfonated poly (ether ether ketone) coated composite hollow fiber membranes [J]. Desalination 2008, 225 (1-3): 82-94.
[18] 何涛,江成璋. 聚醚砜微孔膜制备中非溶剂添加剂作用研究 [J]. 膜科学与技术 1998, 18 (3): 43-48.
[19] Lin D J,Beltsios K,Young T H, et al. Strong effect of precursor preparation on the morphology of semicrystalline phase inversion poly(vinylidene fluoride) membranes [J]. Journal of Membrane Science 2006, 274 (1-2): 64-72.

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