Compostable Polymer Materials

Microneedle array systems for long-acting drug delivery

“…As a biodegradable and non-toxic material, PCL has been extensively utilised in a wide range of drug-delivery devices, notably in the biomedical applications of controlled-release drug delivery systems, absorbable surgical sutures, and three-dimensional scaffolds [179]. Attempts have also been made to utilise PCL for MN fabrication owing to its good solubility, low melting point, and exceptional blend-compatibility [180]. Despite a relatively low water solubility, PCL exhibits favourable solubility in organic solvents.…”

The Impact of Abiotic and Biotic Conditions for Degradation Behaviors of Common Biodegradable Products in Stabilized Composts

“…The FTIR spectrum for pristine PLA biodegradable products showed minor C-H stretching bands at 2997 and 2946 cm −1 , a large C=O stretching band at 1747 cm −1 , alkane C-H bending vibrations at 1452 and 1383, and at 1358 cm −1 , ether C-O stretching vibrations at 1267 and 1209 cm −1 , C-O-C vibration at 1209, ester C-O stretching at 1181 cm −1 , C-O stretching (tertiary alcohol) at 1129 cm −1 , and C-O stretching vibration (secondary alcohol) at 1083 cm −1 ( Figure 3 A and Figure 4 A). Below this wavenumber, some other vibrations were observed, which could not be assigned to PLA, but could originate from additives in the material [ 39 ]. This considers the peaks at 1745 cm −1 and between 3200 cm −1 and 3600 cm −1 which can correspond to the characteristics of the bond when CaCO 3 is used as an additive [ 40 ].…”

“…3A and 4A). Below this wavenumber, some other vibrations were observed, which could not be assigned to PLA, but could originate from additives in the material [39]. This considers the peaks at 1745 cm −1 and between 3200 cm −1 and 3600 cm −1 which can correspond to the characteristics of the bond when CaCO 3 is used as an additive [40].…”