Tailoring novel fibrillar morphologies in poly(vinylidene fluoride) membranes using a low toxic trie

Tailoring novel fibrillar morphologies in poly(vinylidene fluoride) membranes using a low toxic triethylene glycol diacetate (TEGDA) diluent

Zhaoliang Cui, Naser Tavajohi Hassankiadeh, Suk Young Lee, Kyung Taek Woo, Jong Myung Lee, Aldo Sanguineti, Vincenzo Arcella, Young Moo Lee*, Enrico Drioli*

Abstract

Thermally induced phase separation (TIPS) process is an important method to prepare high performance poly(vinylidene fluoride) (PVDF) membranes, but the toxic diluent for membrane formation poses environmental problems. In the present paper, triethylene glycol diacetate (TEGDA) was introduced as a low toxic diluent to fabricate PVDF membranes via TIPS method. A specific fibrillar structure which yields the PVDF membranes with high elongation and permeability was formed. Morphologies, structures, properties and permeation performances of the PVDF membranes showed that they presented α phase, narrow and unimodal pore size distribution, bicontinuous and fibrillar structure, good mechanical strength and comparable permeability.

Graphical abstract

PVDF with low toxic diluent TEGDA via TIPS produced microporous membrane with high elongation and water permeability.


Outline

  1. Highlights

  2. Abstract

  3. Graphical abstract

  4. Keywords

  5. 1. Introduction

  6. 2. Experimental

    • 2.1. Materials

    • 2.2. Phase diagram

    • 2.3. PVDF membrane preparation

    • 2.4. PVDF membrane characterizations

      • 2.4.1. Crystal investigation

      • 2.4.2. Morphology

      • 2.4.3. Pore size distribution, mean pore size and overall porosity measurement

      • 2.4.4. Mechanical property

      • 2.4.5. Pure water flux



  7. 3. Results and discussion

    • 3.1. Phase diagram

    • 3.2. Crystals of the PVDF membranes

    • 3.3. Morphology

    • 3.4. Pore size distribution and porosity

    • 3.5. Mechanical strength properties

    • 3.6. Water contact angle and pure water flux


  8. 4. Conclusions

  9. Acknowledgments

  10. Appendix A. Supplementary materials

  11. References


文章分类： 成果奖项SCI论文