Effect of surface oxyfluorination on the dyeability of polyethylene film.

The effect of surface oxyfluorination on low-density polyethylene (LDPE) film was studied in terms of surface functionality and surface energetics of the film surfaces, which can be attributed to improvement of the dyeability. The growth of functional groups and surface free energy was confirmed by FTIR-ATR, XPS, and contact angle methods. As a result, the total surface free energy was increased with oxyfluorination time, as a progressive increase of the polar component together with a small decrease of the dispersive component of surface free energy.

[Unitary-core osmotic pump tablet for controlled release of water-insoluble drug].

Aim: To study unitary-core osmotic pump tablet for delivering water-insoluble drug for 24 hours.

Methods: Unitary-core osmotic pump tablet was prepared using nifedipine as the model drug. The effects of various core formulation variables on drug release were studied.

[Sandwiched osmotic pump tablet for controlled release of water-insoluble drug].

Aim: To study sandwiched osmotic pump tablet for delivering water-insoluble drug for 24 hours.

Methods: Sandwiched osmotic pump tablet was prepared using nifedipine as the model drug. The effects of various formulation variables and orifice size on drug release were studied.