Poly(vinylidene fluoride) of Different <italic style="font-style: italic">β</italic>-Phase/<italic style="font-style: italic">γ</italic>-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent

Hai-Peng Li; Jia-Meng Liang; Hao-Ying Song; Han-Qi Zhu; Wen-Peng Zhao; Shao-Juan Wang; Hao Zhang; Shou-Ke Yan

doi:10.1007/s10118-025-3302-1

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Poly(vinylidene fluoride) of Different β-Phase/γ-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent

RESEARCH ARTICLE | Updated：2025-04-29

- Poly(vinylidene fluoride) of Different β-Phase/γ-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent
- Chinese Journal of Polymer Science Vol. 43, Issue 5, Pages: 769-777(2025)
- Affiliations：
  
  a.Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China
  b.School of Chemical Engineering, Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao 266042, China
  c.State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Author bio：
  
  zhanghao@qust.edu.cn (H.Z.)
  skyan@qust.edu.cn or skyan@mail.buct.edu.cn (S.K.Y.)
- Funds：
- DOI：10.1007/s10118-025-3302-1
  CLC：
- Received：07 December 2024，
  
  Revised：24 December 2024，
  
  Accepted：2025-01-07，
  
  Published Online：13 March 2025，
  
  Published：30 April 2025
- Accepted：
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Li, H. P.; Liang, J. M.; Song, H. Y.; Zhu, H. Q.; Zhao, W. P.; Wang, S. J.; Zhang, H.; Yan, S. K. Poly(vinylidene fluoride) of different β-phase/γ-phase ratio prepared by heat controlled spin coating and potassium bromide as nucleating agent. Chinese J. Polym. Sci. 2025, 43, 769–777

Hai-Peng Li, Jia-Meng Liang, Hao-Ying Song, et al. Poly(vinylidene fluoride) of Different β-Phase/γ-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent[J]. Chinese journal of polymer science, 2025, 43(5): 769-777.
Li, H. P.; Liang, J. M.; Song, H. Y.; Zhu, H. Q.; Zhao, W. P.; Wang, S. J.; Zhang, H.; Yan, S. K. Poly(vinylidene fluoride) of different β-phase/γ-phase ratio prepared by heat controlled spin coating and potassium bromide as nucleating agent. Chinese J. Polym. Sci. 2025, 43, 769–777 DOI： 10.1007/s10118-025-3302-1.

Hai-Peng Li, Jia-Meng Liang, Hao-Ying Song, et al. Poly(vinylidene fluoride) of Different β-Phase/γ-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent[J]. Chinese journal of polymer science, 2025, 43(5): 769-777. DOI： 10.1007/s10118-025-3302-1.

摘要

PVDF films of controlled

ratio were facilely fabricated by spin-coating and using KBr as nucleating agent. It is the ion-dipole interaction between dissolved K and Br ions and PVDF chains

rather than surface epitaxy

plays an important role in polymorphic behavior.

Abstract

Herein

a simple method for preparing poly(vinylidene fluoride) (PVDF) films with controlled

ratios by spin-coating assisted by potassium bromide (KBr) is proposed. The results show that the relative fraction of the

phase (denoted as

) for the films prepared on the KBr surface first decreased until a critical temperature (denoted as

) was reached

and then increased with increasing spin-coating temperature. This was related to the dissolved K and Br ions in the films. Further experiments showed that below

high humidity can enhance

but exhibit an adverse effect at and above

. The high content of K and Br ions in the PVDF/KBr blend film and larger shear stress can facilitate the formation of the

phase

leading exclusively to the formation of

- and

-phases. The mecha

nism responsible for the change in

with temperature was proposed: below

the decrease in water intake with increasing temperature results in the decline of

whereas above

the increase in

with temperature is attributed to the synergistic effect of ions and shear stress. Ultimately

this paves the way for fabricating PVDF films with tailored

ratios for electroactive and energy-harvesting applications.

关键词

Keywords

references

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⁰

Poly(vinylidene fluoride) of Different β-Phase/γ-Phase Ratio Prepared by Heat Controlled Spin Coating and Potassium Bromide as Nucleating Agent

DOI：10.1007/s10118-025-3302-1

摘要

Abstract

关键词

Keywords

references