KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Subject: search.filters.subject.Biodegradable film

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Characterization and properties of singly and dually modified hydrogen peroxide oxidized and glutaraldehyde crosslinked biodegradable starch films
    (2022-01-01)
    Prachayawarakorn, Jutarat
    ;
    Kansanthia, Pornthip
    Poor properties of native cassava starch film such as low mechanical properties and high water uptake are the limitations of biodegradable starch films. Dual modification is an alternative way to improve the properties. Characteristics and properties of oxidized, crosslinked and dually modified starch films by hydrogen peroxide oxidation and glutaraldehyde crosslinking were examined. Sequence of the dual modification was also studied. All starch films were prepared by casting technique using glycerol plasticizer. The oxidation and crosslinking of modified starch were confirmed by carbonyl and carboxyl contents as well as degree of crosslinking. The lowest and highest molecular weights of the modified starch were observed for the oxidized starch and crosslinked starch, respectively. Moreover, swelling power and moisture absorption of dually modified starch films was clearly lower than those of singly modified films. Additionally, both good stiffness and extensibility was also obtained from the dually modified films especially for the crosslinked-oxidized film. Moreover, thermal property and biodegradability were also determined.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Property improvement of biodegradable citric acid-crosslinked rice starch films by calcium oxide
    (2021-12-15)
    Sornsumdaeng, Kittichai
    ;
    Seeharaj, Panpailin
    ;
    Prachayawarakorn, Jutarat
    Due to several important limitations for packaging applications of starch film such as strength and hydrophilicity, rice starch (Oryza sativa) film was crosslinked with citric acid and modified by different contents of calcium oxide. FTIR spectra showed the evidence of crosslinking by citric acid and the presence of calcium oxide in the modified rice starch films. After the crosslinking, the decrease of degree of crystallinity and swelling including the increase of film smoothness and strain at maximum load were observed. The application of both citric acid and calcium oxide caused greater decrease of swelling, moisture uptake as well as higher stiffness and antibacterial activity than those of the use of only the citric acid. The highest stiffness and antibacterial activity were found for the crosslinked film added by 5 wt% calcium oxide. Moreover, the effect of calcium oxide contents on morphological, thermal and biodegradable properties of the crosslinked films was also investigated.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Property Improvement of Biodegradable High-Methoxy Pectin Film by Different Contents of Dialdehyde Starch
    (2020-08-01)
    Prachayawarakorn, Jutarat
    ;
    Poomkaew, Sasikorn
    In order to improve high hydrophilicity and low mechanical properties of biodegradable high-methoxy pectin (HMP) film, dialdehyde starch (DS) were introduced. In this study, different HMP/DS blended films were prepared by varying DS contents. It was observed from Infrared spectra that lower peak intensity of C=O stretching was detected after the incorporation of DS into HPM film. Moreover, moisture uptake of various HMP/DS blended films was found to be significantly lower than those of HMP film with the addition of low DS content. The improvement of mechanical properties was observed in various HPM/DS blended films. In addition, color parameters, swelling power, morphological and biodegradable properties of various HMP/DS blended films were also investigated.