Hydrophilic modifications of PVDF membranes via swift heavy ion irradiations

Abstract

The paper presents the hydrophilic modification of polyvinylidene fluoride (PVDF) membranes under swift heavy ion (SHI) irradiation. The research work included the irradiation of PVDF membranes of 9 μm thicknesses with 50 MeV Ni ions at fluences of 1 × 10 13 and 5 × 10 13 ion cm −2 . The pristine and irradiated membranes have been investigated by means of Fourier transform infrared spectroscopy, atomic force microscopy, scanning electron microscope and water contact angle measurement. It is observed that porosity, grain size and surface roughness of the membranes increase after ion irradiation and the water contact angle on irradiated sample decreases as compared to the pristine sample, indicating the development of a highly hydrophilic surface. The energy transferred by energetic ions to the PVDF membranes initiated the crosslinking and chain scission. The crosslinking and chain scission increase the roughness of PVDF surface which develops highly hydrophilic PVDF membranes after SHI irradiation.

Defect Engineering of Sb2Te3 through Different Doses of Ion Irradiation to Boost Hydrogen Evolution Reaction Performance

“…The results show that Fe 8e14 -Sb 2 Te 3 /Ti has increased hydrophilicity compared to that of Sb 2 Te 3 /Ti. From Figure S14, it can be shown that as the irradiation dose increases, the hydrophilicity of the catalyst increases in turn . The water molecules are prone to experience adsorption on the defect sites. , In addition, H 2 O may strongly interact with unbonded Sb and Te atoms, which also contributes to the hydrophilicity of irradiated samples .…”

Synthesis of carbon quantum dots to fabricate ultraviolet‐shielding poly(vinylidene fluoride) films

“…Many effective strategies, for example blending, radiation grafting, surface coating, swift heavy ion irradiation, surface depositing, and three‐dimensional printing, have been applied to modify the PVDF material . Many researchers have reported modified PVDF films with antifouling, pH responsive, wetting resistance, piezoelectric, and hydrophilic performance . To yield some new characteristics, many studies are still ongoing.…”

“…It has been widely used in water treatment, distillation, electrical energy storage, composite film preparation, fuel cells and batteries, gas absorption and desorption, chemical pulse cleaning, and so on. Many effective strategies, for example blending, radiation grafting, surface coating, swift heavy ion irradiation, surface depositing, and three‐dimensional printing, have been applied to modify the PVDF material . Many researchers have reported modified PVDF films with antifouling, pH responsive, wetting resistance, piezoelectric, and hydrophilic performance .…”