Drawing presents different PET films (PET, PET-H, PET-G and PET-T). 

Contexts in source publication

Context 1

... samples were left for 24 h at the ambient temperature, which was 37 °C. Then, the activation solution was removed by suction; subsequently the samples were washed with distilled water. The obtained activated samples were dried overnight at room temperature, and then used for the grafting reactions. These activated samples were labelled as PET-H (Fig. ...

Context 2

... activated samples (PET-H), placed in a polystyrene plate, were incubated for 24 h at 40 ºC with a solution of glutaraldehyde. The solutions were removed by suction and the samples were washed well with distilled water. The samples were dried for 24 h at room temperature. These samples were labelled as PET-G (Fig. ...

Context 3

... efficiency of the modified surface was tested with tryptophan. An aqueous solution of 5 mmol/L tryptophan was prepared (204 mg L-Tryptophan to 200 mL distilled water). PET-G samples were incubated into this tryptophan solution for 24 h at 30 ºC. The solutions were removed. Then, these samples (labelled as PET-T, Fig. 1) were washed with distilled water, and dried at room ...

Context 4

... The FTIR spectrum of yellow precipitate (PET-H) shows two additional IR transmittance bands at around 1618 cm -1 and 3315 cm -1 that are attributed to N-H bend and N-H stretch respectively, and it is characteristic of primary amides. This result confirms the activation of surface with hydrazine as shown in Figure 1. ...