Effect of heat treatment on thermal resistance, transparency and antimicrobial activity of sonicated ginger cellulose film. (15th July 2020)

• Record Type: Journal Article
• Authors: Abral, Hairul; Ariksa, Jeri; Mahardika, Melbi; Handayani, Dian; Aminah, Ibtisamatul; Sandrawati, Neny; Sugiarti, Eni; Muslimin, Ahmad Novi; Rosanti, Santi Dewi
• Is Part Of: Carbohydrate polymers. Volume 240(2020)
• Publication Date: 2020-07-15
• Subjects: Antimicrobial activity -- Cellulose nanofiber -- Relaxation -- Ultrasonication -- Residual strain; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.116287
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Sonicated film from ginger nanocellulose was treated with long heating durations. This heated film showed relaxation mechanisms and higher thermal resistance. The film had lower wavenumber of C-O stretching causing lower electronegativity. Heating of 150 °C turned a brownish-yellow as a result of oxidation. Abstract: Transparent film with high thermal resistance and antimicrobial properties has many applications in the food packaging industry particularly packaging for reheatable food. This work investigates the effects of heat treatment on the thermal resistance, stability of transparency and antimicrobial activity of transparent cellulose film. The film from ginger nanocellulose fibers was prepared with chemicals and ultrasonication. The dried film was heated at 150 °C for 30, 60, 90, or 120 min. The unheated and sonicated film had the lowest crystallinity index and the lowest thermal properties. After heating, the film became brownish-yellow resulting from thermal oxidation. The reheated film had higher thermal resistance than unheated film. Heating led to further relaxation of cellulose network evidenced by shifting of the XRD peak positions toward lower values. The antimicrobial activity decreased due to heating. Average opacity value increases after short heating durations. It was relatively stable for further heating.