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Qiao XT, Gong L, Chen SH, Zhan SP, Sun XD. Isothermal Crystallization Behavior of Poly(vinylidene fluoride) Based Membrane with Graphene Oxide. INT POLYM PROC 2020. [DOI: 10.3139/217.3786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Graphene oxide (GO) sheets were obtained via an improved Hummer's method, and the Poly(vinylidene fluoride) (PVDF)/GO membranes employing GO as nucleating agent were prepared by solution casting. The crystalline behaviors and the crystallization kinetics of PVDF/GO membranes with varying GO concentration were investigated after isothermal crystallization at different temperatures. The results showed that the addition of GO induced the β-phase formation of PVDF. The spherulite diameter reached the peak value when the content of GO was 0.1 wt%, then reduced to the minimum value at 1 wt% GO within the tested temperature range of isothermal crystallization. It is worth mentioning that the relative fraction of β phase F(β) was dramatically improved to 0.85 for the PVDF/GO membrane with 0.5 wt% GO at 155°C. Furthermore, an enhancement of the crystallization rate was observed as the contents of GO increased in the system.
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Affiliation(s)
- X.-T. Qiao
- Department of Environment and Chemical Engineering , Dalian University, Dalian , PRC
- Liaoning Engineering Laboratory for Special Optical Functional Crystals , Dalian University, Dalian , PRC
| | - L. Gong
- Department of Environment and Chemical Engineering , Dalian University, Dalian , PRC
- Liaoning Engineering Laboratory for Special Optical Functional Crystals , Dalian University, Dalian , PRC
| | - S.-H. Chen
- Department of Environment and Chemical Engineering , Dalian University, Dalian , PRC
- Liaoning Engineering Laboratory for Special Optical Functional Crystals , Dalian University, Dalian , PRC
| | - S.-P. Zhan
- Department of Environment and Chemical Engineering , Dalian University, Dalian , PRC
- Liaoning Engineering Laboratory for Special Optical Functional Crystals , Dalian University, Dalian , PRC
| | - X.-D. Sun
- Department of Environment and Chemical Engineering , Dalian University, Dalian , PRC
- Liaoning Engineering Laboratory for Special Optical Functional Crystals , Dalian University, Dalian , PRC
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