TIPS behavior for IPP/nano-SiO2 blend membrane formation and its contribution to membrane morphology and performance

doi:10.1016/j.cjche.2018.06.021

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (2): 467-475.DOI: 10.1016/j.cjche.2018.06.021

• Materials and Product Engineering • 上一篇下一篇

TIPS behavior for IPP/nano-SiO₂ blend membrane formation and its contribution to membrane morphology and performance

Zhensheng Yang¹, Zheng Sun¹, Dongsheng Cui¹, Pingli Li², Zhiying Wang¹

1 School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
2 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

收稿日期:2018-01-30 修回日期:2018-06-12 出版日期:2019-02-28 发布日期:2019-03-18
通讯作者: Zhensheng Yang
基金资助:
Supported by the Key Project of Scientific and Technological Research of Hebei Provincial University (ZD2015107)

TIPS behavior for IPP/nano-SiO₂ blend membrane formation and its contribution to membrane morphology and performance

Zhensheng Yang¹, Zheng Sun¹, Dongsheng Cui¹, Pingli Li², Zhiying Wang¹

1 School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
2 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received:2018-01-30 Revised:2018-06-12 Online:2019-02-28 Published:2019-03-18
Contact: Zhensheng Yang
Supported by:
Supported by the Key Project of Scientific and Technological Research of Hebei Provincial University (ZD2015107)

摘要/Abstract

摘要： In the present work, the TIPS behavior of isotactic polypropylene (iPP)/di-n-butyl phthalate (DBP)/dioctyl phthalate (DOP)/nano-SiO₂ system and the competition relation between liquid-liquid phase separation and polymer crystallization are successfully adjusted by adding nano-SiO₂. The liquid-liquid phase separation temperature of the system increases with increasing nano-SiO₂ content. Besides, iPP crystallization temperature is also changed after adding nano-SiO₂. IPP/nano-SiO₂ blend hollow fiber microporous membrane is prepared via TIPS method. SEM photos show that the membrane exhibits mixed morphology combining cellular structure relating to liquid-liquid phase separation and branch structure originating from polymer crystallization. The relative weight of cellular structure first decreases and then increases with the increase of nano-SiO₂ content. Furthermore, porosity, connectivity among pores and pure water flux of the membrane first increase and then decrease with increasing nano-SiO₂ content. However, mechanical performance of the membrane is improved at all times with increasing nano-SiO₂ content.

关键词: Isotactic polypropylene, Nanoparticles, Blend, Membrane, Thermally induced phase separation

Abstract: In the present work, the TIPS behavior of isotactic polypropylene (iPP)/di-n-butyl phthalate (DBP)/dioctyl phthalate (DOP)/nano-SiO₂ system and the competition relation between liquid-liquid phase separation and polymer crystallization are successfully adjusted by adding nano-SiO₂. The liquid-liquid phase separation temperature of the system increases with increasing nano-SiO₂ content. Besides, iPP crystallization temperature is also changed after adding nano-SiO₂. IPP/nano-SiO₂ blend hollow fiber microporous membrane is prepared via TIPS method. SEM photos show that the membrane exhibits mixed morphology combining cellular structure relating to liquid-liquid phase separation and branch structure originating from polymer crystallization. The relative weight of cellular structure first decreases and then increases with the increase of nano-SiO₂ content. Furthermore, porosity, connectivity among pores and pure water flux of the membrane first increase and then decrease with increasing nano-SiO₂ content. However, mechanical performance of the membrane is improved at all times with increasing nano-SiO₂ content.

Key words: Isotactic polypropylene, Nanoparticles, Blend, Membrane, Thermally induced phase separation

Zhensheng Yang, Zheng Sun, Dongsheng Cui, Pingli Li, Zhiying Wang. TIPS behavior for IPP/nano-SiO₂ blend membrane formation and its contribution to membrane morphology and performance[J]. Chinese Journal of Chemical Engineering, 2019, 27(2): 467-475.

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TIPS behavior for IPP/nano-SiO₂ blend membrane formation and its contribution to membrane morphology and performance

TIPS behavior for IPP/nano-SiO₂ blend membrane formation and its contribution to membrane morphology and performance

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