Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 59, Issue 8, Pages 3438-3445Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b06432
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Funding
- National Natural Science Foundations of China [21434002]
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Poly(vinylidene fluoride) (PVDF) was blended with cetyltrimethylammonium bromide (CTAB)-modified illite through a solvent-casting method. The effects of the content of modified illite and temperature on gamma-phase PVDF crystallization were studied in detail. Unmodified illite does not affect the crystallization of PVDF. By contrast, modified illite can effectively boost the nucleation of the gamma-phase due to the electrostatic interaction between PVDF and modified illite. For PVDF with low contents of modified illite, for example, 0.5 wt %, the ability to obtain the gamma-phase is enhanced at 155 degrees C compared with neat PVDF. Increasing the crystallization temperature or the content of modified illite facilitates to form more gamma-phase. Blending of 2.0% modified illite generates a pure gamma-phase regardless of crystallization temperature. The technique to prepare pure gamma-phase PVDF materials has a huge potential application in the fabrication of cheap pyro- or piezoelectric devices.
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