Fabrication of skinless cellular poly (vinylidene fluoride) films by surface-constrained supercritical CO2 foaming using elastic gas barrier layers
نویسندگان
چکیده
Removing the solid skin of polymer foams is a challenging approach for supercritical carbon dioxide (scCO2) foaming. Herein, surface-constrained foaming method was used to fabricate skinless cellular poly (vinylidene fluoride) (PVDF) films. The use organosilicone and nature latex as gas barrier layers resulted in low CO2 diffusion rates 2.16 × 10−11 m2/s 4.73 10−13 m2/s, trigger heterogeneous nucleation cells on PVDF/barrier layer interface. cell size gradient region close surface were successfully eliminated, density could be controlled range 7.2 106 cells/cm3, 13–41 µm, respectively. Moreover, fabricated PVDF films exhibited an enhanced melting temperature crystallinity due plasticizing effect scCO2. present study provides new thoughts fabrication using scCO2
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ژورنال
عنوان ژورنال: Journal of Supercritical Fluids
سال: 2022
ISSN: ['1872-8162', '0896-8446']
DOI: https://doi.org/10.1016/j.supflu.2022.105562