UV-induced grafting polymerization of NIPAAm hydrogel and deposit of hydroxyapatites-like films on polymer surface by atmospheric plasma treatment

Surface graft polymerization can induce pure functional groups on surfaces which has a wide range of applications. In this study, helium atmospheric plasma treated (APT) (voltage: 12,00V, gas flow rate 0.4 l/min, glow distance 10mm) polyethylene terephthalate (PET) and thermoplastic polyurethane (TPU) nonwoven in order to activate the surface. Subsequently UV-induced surface graft polymerization of the temperature sensitive hydrogel N-isopropylacrylamide (NIPAAm) on the plasma activated material surface was performed and then deposition of hydroxyapatite (HA: Ca
₅
(OH)(PO
₄
)
₃
) on treated samples were immersed in two separate solutions (Ca
²⁺
and PO
₄
^3-
source) for 30 min in each solution percycle. The results showed that, APT He treated can improved the hydrophilicity on surface. Also could be successfully grafted poly (NIPAAm) gel on the polymer surface and deposit of Hydroxyapatites-like Films on polymer surface.