Thermosensitive surface properties of polyethylene film with poly(N-isopropylacrylamide) chains prepared by corona discharge induced grafting

Abstract

Polyethylene (PE) film was treated by corona discharge and then grafted with N-isopropylacrylamide(NIPAAm) for modification of the surface. The grafted amount was determined by gravimetry and the surface morphology was observed by using a scanning electron microscope. The surface analysis was carried out with a xray photoelectron spectroscopy and electron probe microanalysis. It was clarified that grafting was limited surface and there was no change of the surface morphology after grafting. The water absorption at various temperature under the absolute humidity (11.4 g/cm 3 ) and the leakage of electrostatic charge from PE film were measured. Poly-NIPAAm that was introduced onto PE surface has hydrophilic-hydrophobic transition properties at

Adsorption of poly(N-isopropylacrylamide) on glass substrata

“…Investigations have been undertaken to graft PNIPAAM onto surfaces in order to create smart materials [9][10][11][12]. However, grafting is often a complicated technique and it concerns mainly polymeric substrata.…”

Untitled

“…The incorporation of functional groups in polymers to modify their surface without changing the bulk properties of the material has been widely studied (Kubota and Ujita, 1995;Kubota and Shiobara 1998;Yakushiji and Sakai, 1998;Liang et al;Okahata et al, 1986). This is especially important in biomaterials where interactions between the surface and cells are requested (Makino et al, 1999;Ong et al, 1999;Seto et al, 1998). Nowadays a large number of surfacemodification technologies are available.…”

Surface grafting of poly(vinylamine) onto poly(ethylene) film by corona discharge-induced grafting

“…The dose rate was calculated as 46.7 mW/cm 2 . Films were treated for 4 min per side that was determined to give the maximum peroxide concentration to PE film surface 11, 12. The corona‐treated PE film was then immersed in a 10 wt % aqueous solution of NVF or NVA in a glass ampoule within 10 s, respectively.…”