Saintim, Adriana (2021) Characterisation and application of soluble pineapple puree pectin-based films on stored agar-agar powder properties. [Project Paper] (Submitted)
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Abstract
The growing production of plastics food packaging possess negative impact to the environment and human. Therefore, this study aims to explore the application of soluble pineapple puree pectin-based (PPA) packaging films on the quality changes of agar-agar powder properties under different storage temperatures. Two objectives of the study were to characterize the soluble PPA films properties, including water solubility, tensile, seal strength, water vapour permeability, surface roughness and optical, and to evaluate the effect of the films on the quality changes in stored agar-agar powder. The soluble PPA films were made using a formulation ratio of 1:0.5:1 (pectin:glycerol:pineapple puree). For soluble pectin-based (PG) film, which acts as a control, the formulation is 1:0.5 (pectin:glycerol). Water solubility test, texture analyzer, water vapour permeation test, atomic force microscopy (AFM) and colorimeter were carried out to characterize the films. The agar-agar powders were stored for 39 days at ambient (28 °C) and chill (4 °C) temperatures. At selected storage time, moisture content, true density and colour of agar-agar powder were evaluated using moisture analyzer, gas pycnometer and colorimeter, respectively. The results revealed that soluble PPA film has a higher solubility percentage than soluble PG film, where the solubility percentage of soluble PPA and PG films were 97.3 ± 1.7% and 93.7 ± 5.8%, respectively. The tensile properties of the soluble PPA film were 3.5 + 0.1 MPa for tensile strength (TS), 34.2 ± 3.9% for elongation at break (EAB), 0.2 ± 0.0 MPa for Young Modulus (YM) and 0.7 + 0.0 MJ/m3 for toughness. Meanwhile, the soluble PG film showed values of TS, EAB, YM and toughness of 4.3 ± 0.1 MPa, 42.1 ± 1.2%, 0.2 ± 0.0 MPa and 1.1 ± 0.0 MJ/m3, respectively, which were slightly higher than the soluble PPA film. The seal strength result showed insignificant difference between both types of film. Additionally, the optical properties showed that PPA film was insignificantly less transparent compared to soluble PG film. Moreover, the water vapour permeability (WVP) of soluble PPA film was slightly better than soluble PG film, although there was no significant improvement. The AFM test revealed that soluble PPA film has a significantly smoother surface than soluble PG film. For the studies of quality changes on the agar-agar powder at selected storage temperature, the result for all the tests (moisture content, true density and the colour changes of agar-agar powder) showed the quality changes were not significantly different by the type of films and storage temperatures. However, the results were significantly difference by the storage period. Packaging tests revealed that both soluble PPA and PG films showed potential soluble material in food powder packaging application.
| Item Type: | Project Paper |
|---|---|
| Subjects: | S Agriculture > S Agriculture (General) |
| Faculty: | Faculty of Engineering |
| Depositing User: | Ms. AZLINA ZAINAL ABIDIN |
| Date Deposited: | 09 Apr 2026 02:19 |
| Last Modified: | 09 Apr 2026 02:19 |
| URI: | http://psaspb.upm.edu.my/id/eprint/2756 |
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