Thin Hydrogel Films With Nanoconfined Surface Reactivity by Photoinitiated Chemical Vapor Deposition
Laura Montero
Salmaan H. Baxamusa
Salvador Borros
Karen K. Gleason
10.1021/cm802737m.s001
https://acs.figshare.com/articles/journal_contribution/Thin_Hydrogel_Films_With_Nanoconfined_Surface_Reactivity_by_Photoinitiated_Chemical_Vapor_Deposition/2883034
Several property requirements have led to the modification of hydrogels by incorporating functional groups. The current work seeks to achieve graded functional group incorporation into hydrogel thin films using the one-step technique of photoinitiated CVD (piCVD). The functional group pentafluorophenylmethacrylate (PFM) is copolymerized with hydroxyethyl methacrylate (HEMA). Because PFM reacts easily with amine groups, the incorporation of PFM results in a platform for subsequent functionalization. The graded copolymer confines the PFM to the near surface region (∼20 nm) allowing the control of the hydrogel film properties independently of the surface reactivity. Although homogeneous incorporation of PFM in the hydrogel matrix inhibits swelling, the swollen water content of pure pHEMA is nearly preserved in the graded copolymer. FTIR spectroscopy shows that the absorption peaks corresponding to the fluorinated phenyl ring in the graded copolymer disappear after functionalization with O,O-bis (2-aminoethyl) polyethylene (PEG-diamine), suggesting a nearly complete conversion of the PFM bonds.
2009-01-27 00:00:00
water content
amine groups
Nanoconfined Surface Reactivity
hydroxyethyl methacrylate
PFM bonds
Thin Hydrogel Films
group incorporation
FTIR spectroscopy
HEMA
PFM results
absorption peaks
group pentafluorophenylmethacrylate
hydrogel film properties
hydrogel matrix
surface reactivity
photoinitiated CVD
copolymer confines
Photoinitiated Chemical Vapor DepositionSeveral property requirements
phenyl ring