The Effect of Stretching on UHWMPE Microporous Film by Thermally Induced Phase Separation Method

Abstract:

UHMWPE microporous membranes were prepared via thermally induced phase separation(TIPS) combining with stretching. TIPS method was adopted to resolve processing difficulties of UHMEPE, and the subsequent stretching was used to optimize pore structure. The preparation process utilized liquid paraffin (LP) as the diluent. The effect of different stretching ratios on pore structure was investigated through SEM, XRD and mercury intrusion test. The results indicated that stretching process not only greatly improved the pore size uniformity and pore distribution uniformity, but also had a great influence on pore size controlling. When the stretching ratio was lower than 80%, the pore size was concentrated in nano-region which pore size distribution was around 0.02-0.03 μm. While the stretching ratio was larger than 80%, due to bridging breakage and liquid paraffin movement, pore size was concentrated in the micron area where pore size mainly distributed around 1μm, which had a practical significance for controlling the pore size of membranes in industrial production. And it’s obtained that at the same concentration of UHMWPE, the microporous membranes prepared in this study have more uniform pore structures than those reported previously.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 906-914
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.906
• Online since: May 2020
• Authors: Xiao Na Wang, Yue Mu*, Guo Qun Zhao, Jia Cheng Gao, You Lei Zhou, Zhi Hao Cheng
• Keywords: Stretching, Thermally Induced Phase Separation, UHMWPE Microporous Membranes

References

[1] Jeffrey W. Fergus, Recent developments in cathode materials for lithium ion batteries, J. Power Sources. 195 (2010) 939-954.

DOI: 10.1016/j.jpowsour.2009.08.089

[2] Languang Lu, Xuebing Han, Jianqiu Li, A review on the key issues for lithium-ion battery management in electric vehicles, J. Power Sources. 226 (2013) 272-288.

DOI: 10.1016/j.jpowsour.2012.10.060

[3] Naoki Nitta, Feixiang Wu, Jung Tae Lee, Li-ion battery materials: present and future, J. Materials Today. 18 (2015) 252-264.

DOI: 10.1016/j.mattod.2014.10.040

[4] Haruyuki Yoneda, Yoshifumi Nishimura, Yoshinao Doi, Development of microporous PE films to improve lithium ion batteries, J. Polymer. 42 (2010) 425-437.

DOI: 10.1038/pj.2010.25

[5] Yajie Li, Hongting Pu, Facile fabrication of multilayer separators for lithium-ion battery via multilayer coextrusion and thermal induced phase separation, J. Power Sources. 384 (2018) 408-416.

DOI: 10.1016/j.jpowsour.2018.02.086

[6] Cai Qi, Xu Ruijie, Wu Shuqiu, Influence of annealing temperature on the lamellar and connecting bridge structure of stretched polypropylene microporous membrane, J. Society of Chemical Industry. 64 (2015) 446-452.

DOI: 10.1002/pi.4828

[7] Lei Caihong, Wu Shuqiu, Xu Ruijie, Influence of Low Molecular Weight Tail of Polypropylene Resin on the Pore Structure by Room-Temperature Stretching, J. Polymer Engineering and Science. 53 (2013) 2594-2602.

DOI: 10.1002/pen.23527

[8] Ruijie Xu, Xiande Chen, Jiayi Xie, Influence of Melt-Draw Ratio on the Crystalline Structure and Properties of Polypropylene Cast Film and Stretched Microporous Membrane, J. American Chemical Society. 54(2015) 2991-2999.

DOI: 10.1021/acs.iecr.5b00215

[9] Farhad Sadeghi, Abdellah Ajji, Pierre J. Carreau, Microporous membranes obtained from polypropylene blends with superior permeability properties, J. Polymer Science: Part B: Polymer Physics. 46 (2008) 148-157.

DOI: 10.1002/polb.21350

[10] Seyed H. Tabatabaei, Pierre J. Carreau, Abdellah Ajji, Microporous membranes obtained from PP/HDPE multilayer films by stretching, J. Membrane Science. 345 (2009) 148-159.

DOI: 10.1016/j.memsci.2009.08.038

[11] Caihong Lei, Ruijie Xu, Ziqin Tian, Stretching-Induced Uniform Micropores Formation: An in Situ SAXS/WAXS Study, J. Macromolecules. 51 (2018) 3433-3442.

DOI: 10.1021/acs.macromol.7b02335

[12] Sijun Liu, Chixing Zhou, Wei Yu, Phase separation and structure control in ultra-high molecular weight polyethylene microporous membrane, J. Membrane Science. 379 (2011) 268-278.

DOI: 10.1016/j.memsci.2011.05.073

[13] Huaiyu Ding, Ye Tian, Lihua Wang, Preparation of ultrahigh-molecular-weight polyethylene membranes via a thermally induced phase-separation method, J. Applied Polymer Science. 105 (2007) 3355-3362.

DOI: 10.1002/app.26521

[14] ZHAO Changsong, HE Jianyun, LI Jiawei, Preparation and properties of UHMWPE microporous membrane for lithium ion battery diaphragm, J. Materials Science and Engineering. 324 (2018) 012089.

DOI: 10.1088/1757-899x/324/1/012089

[15] Gongde Liu, Yingzi Chen, Huilin Li, Study on Processing of Ultrahigh Molecular Weight Polyethylene/Polypropylene Blends: Capillary Flow Properties and Microstructure, J. Applied Polymer Science. 92 (2004) 3894-3900.

DOI: 10.1002/app.20418

[16] O. I. Skul'skii, E. V. Slavnov, Features of Extrusion Processing of Ultrahigh Molecular Weight Polyethylene. Experiment and Theory, J. Engineering Physics and Thermophysics. 91 (2018) 556-557.

DOI: 10.1007/s10891-018-1776-1

[17] Shan Wang, Amir Saffar, Abdellah Ajji, Fabrication of Microporous Membranes from Melt Extruded Polypropylene Precursor Films via Stretching: Effect of Annealing, J. Polymer Science. 33 (2015) 1028-1037.

DOI: 10.1007/s10118-015-1643-x

[18] Seyed H. Tabatabaei, Pierre J. Carreau, Abdellah Ajji, Microporous membranes obtained from polypropylene blend films by stretching, J. Membrane Science. 325 (2008) 772-782.

DOI: 10.1016/j.memsci.2008.09.001

[19] Chunfang Zhang, Yunxiang Bai, Yuping Sun, Preparation of hydrophilic HDPE porous membranes via thermally induced phase separation by blending of amphiphilic PE-b-PEG copolymer, J. Membrane Science. 365 (2010) 216-224.

DOI: 10.1016/j.memsci.2010.09.007

[20] Benzhe Luo, Zonghuan Li, Jun Zhang, Formation of anisotropic microporous isotactic polypropylene (iPP) membrane via thermally induced phase separation, J. Desalination. 233 (2008) 19-31.

DOI: 10.1016/j.desal.2007.09.023

[21] Il Juhn Roh, Senthilkumar Ramaswamy, William B. Krantz, Poly(ethylene chlorotrifluoroethylene) membrane formation via thermally induced phase separation (TIPS), J. Membrane Science. 362 (2010) 211-220.

DOI: 10.1016/j.memsci.2010.06.042

[22] Jie Zhao, Lei Shi, Chun Heng Loh, Preparation of PVDF/PTFE hollow fiber membranes for direct contact membrane distillation via thermally induced phase separation method, J. Desalination. 430 (2018) 86-97.

DOI: 10.1016/j.desal.2017.12.041

[23] Ting Ma, Zhenyu Cui, Ying Wu, Preparation of PVDF based blend microporous membranes for lithium ion batteries by thermally induced phase separation: I. Effect of PMMA on the membrane formation process and the properties, J. Membrane Science. 444 (2013) 213-222.

DOI: 10.1016/j.memsci.2013.05.028

[24] Feng Zuo, Jong Kahk Keum, Ling Yang, Thermal Stability of Shear-Induced Shish-Kebab Precursor Structure from High Molecular Weight Polyethylene Chains, J. Macromolecules. 39 (2006) 2209-2218.

DOI: 10.1021/ma052340g

[25] Yong Wang, Bing Na, Qiang Fu, Shear induced shish-kebab structure in PP and its blends with LLDPE, J. Polymer. 45 (2004) 207-215.

DOI: 10.1016/j.polymer.2003.10.020