Emulsion and Ultrasonication in the Nanoencapsulation of Ibuprophen Coated with Polyblend of Poly(lactic Acid) and Poly (ε-Caprolactone)

Polyblend of poly(lactic acid) (PLA) and poly(ε-caprolactone)(PCL) as coating of ibuprophen has been prepared. The encapsulation of ibuprophen in this study was carried out by emulsification and ultrasonication technique. The PLA used was synthesized with an average molecule weight (Mv) 9463 g/mol. Nanocapsules obtained were ranged between 480 to 950 nm. The optimum sonication time in the formation of nanocapsules was 60 minute. The efficiency and the size of nanocapsules increased with the increasing of sonication time. The nanocapsules efficiency at sonication time 30, 45, and 60 minutes were 4.514, 9.724, and 5.987 % respectively

Synthesis and Characterization of Polystyrene-starch Polyblend

Polystyrene foam (PS) is a polymer that is widely used but not biodegradable. Therefore, PS-starch polyblend was developed. In this research the effect of glycerol as plasticizer was evaluated based on mechanical and thermal analyses. PS-starch polyblends were produced by mixing PS and starch solution with composition ratios of 60:40, 65:35, 70:30, 75:25, and 80:20 percent by weight. Polylactic acid (20%) was added as compatibilizer. The polyblends were analyzed its tensile strength, thermal properties, and density. The PS-starch polyblends were white opaque in color and fragile. The properties of tensile strength and density of the polyblends were in the range of that of pure PS. The tensile strength and density increases as PS constituents increasing with the best composition ratio of 80 PS to 20 of starch. Peak of glass transition and melting point seen a single on composition ration 80 PS to 20 of starch. Additional amount of glycerol did not affect the thermal property, but has caused a slight decrease in tensile strength and density