Abstract. In this study, the physical and mechanical properties of gellan gum (GG) films incorporated manuka honey were investigated. The result shown that by increasing the honey content in GG film, the swelling, gel fraction and mechanical properties were decreased. Gellan gum films incorporated with highest concentration of honey at 10% (GEL-H10) has lowest tensile strength and Yong's modulus at 0.91 ± 0.2 MPa and 38.9 ± 1.7 kPa, respectively compared to GG films at lower concentration of honey. The water vapour transmission rate of GEL-H10 was recorded at 1145 ± 175 g m⁻²d⁻¹ which comparable with the commercial wound dressing product. This film has shown promising results to be used as wound dressing application.
Studies on plant materials as natural compound such as carvacrol (Carv) have gained much attention. Carv exhibits numerous potential as antimicrobial agent, food additives, antioxidant and etc. However, this free standing bioactive compound is unstable in the harsh environment conditions. Hence, the encapsulation technology provides protection to enhance the effectiveness in release manner. In this study, the preparation of Carv encapsulated in gellan gum hydrogel forming thin film (GG-Carv TF) was achieved by using 1.0 g of gellan gum at different concentrations of Carv (0.01-0.04 M). The FTIR spectra of GG-Carv TF revealed the combination of both functional groups from GG and Carv. The Carbon, Hydrogen and Nitrogen, CHN analysis further confirmed the encapsulation with the changes in the element percentage. Both swelling and degradation percentage increased with time and showed decreasing patterns in the range of 680.79-666.78 % and 26.83-19.15 % which can be observed as the concentration of Carv increased, respectively.
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