Salim, Nur Hafizah (2020) Characterization of tensile strength, thermal properties, self-healing and anti-fogging properties of gelatin based film from tilapia fish scales. [Project Paper] (Submitted)
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Abstract
Gelatin is a low cost protein that are widely used in pharmaceuticals and food because of its unique functional properties as well as its availability in Malaysia. Red Tilapia's (Oreochromis spp.) scale is one of the potential source of gelatin that are taken from marine waste in Malaysia. Gelatin is derived from fibrous protein collagen in animal skin, connective tissue and bone. Regarding the problems that occurred on plastic packaging that has limiting factors in which relatively poor performance under impact loading due to lack of plastic deformation, self-healing materials are getting more attention to reduce fatigue and subsequent probability of failure. Therefore increase the development of packaging materials that have the ability to self-heal in which can restore the films function. Demand of longer shelf life and higher quality of foods which in need of good mass transfer barriers to moisture, oxygen, carbon dioxide, lipid, flavour and aroma between food components and the surrounding atmosphere led to the finding of packaging materials such as gelatin that can serve good quality of mass transfer barrier that suitable for certain food such as vegetables. Study on the gelatin based films recently found that gelatin have a good properties that allow the diffusion of water vapour and gasses that can be a cause to the food spoilage. Problems regarding synthetic polymers as packaging materials also has led to serious ecological issues in which they takes hundred years to degrade in which contribute to the development of studies of materials that can degrade in shorter time such as gelatin. Moreover gelatin is extract from marine waste such as Red Tilapia's (Oreochromis spp.) scale in which can reduce pollution and encourage recycling of waste. Recent studies has been proof that gelatin exhibit excellent film forming properties incorporate to its gelling properties. Recent studies also stated that gelatin has the selfhealing properties due to the swelling or the versatility of the pol5mer network with the present of water (HzO). Self-healing materials is said to have antifogging behaviour due to its hydrophilic nature in which it can be the best added value to the films when apply to the foods. Incorporating to the excellent properties of the gelatin itself, the objective of this research study were stacked to characterizethetensile and thermal properties of gelatin based fitms (with and without glycerol) and study of the self-healing and anti-fogging properties of gelatin based films (with and without glycerol) that is taken from Red Tilapia species (Oreochromis spp.).The gelatin films were charactetrzedby its tensile properties, thermo-gravimetric analysis (TGA) which determine its thermal stability and differential scanning calorimetry (DSC) which determine the glass transition temperature and the melting temperature of the films. It shows that incorporating the glycerol towards the gelatin films decrease the tensile strength value to almost 78.3% while increase the flexibility of the films to almost 92.9yo, decrease the decomposition temperature to 5.07% at between range of temperature 455.2C to 486.6'C which improve thermal stability of the films and decrease the glass transition temperature from 36.5"C to 28.3'C as well as melting temperature of the gelatin based films from 92.5'Cto 41.0"C In order to determine the self-healing of the gelatin based films, the films were damaged by razor blade and drops of water (IIzO) were added. The films stimulate to the water (H2O) that added and it response by swelling which later on filling the damaged gap between the frlms. In several minutes, the films healed and restore its function. Meanwhile, anti-fogging behaviour of the gelatin based films were determined from the water vapour and oxygen (Oz) transfer through the films that covered mushrooms in the container. From the study, it can be conclude that gelatin based films that were taken from Red Tilapia species (Oreocltromis spp.) have the excellent properties which have the ability to selfheal when damaged and exhibit good anti-fogging behaviour.
| Item Type: | Project Paper |
|---|---|
| Faculty: | Faculty of Engineering |
| Depositing User: | Ms. AZLINA ZAINAL ABIDIN |
| Date Deposited: | 19 Nov 2024 07:44 |
| Last Modified: | 19 Nov 2024 07:44 |
| URI: | http://psaspb.upm.edu.my/id/eprint/2199 |
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