Thermal and structural changes of a starch flexible film and cellulosic semi-rigid tray during the biodegradation process under controlled composting conditions.
Int J Biol Macromol
; 279(Pt 4): 134595, 2024 Nov.
Article
in En
| MEDLINE
| ID: mdl-39122066
ABSTRACT
Biopolymers used to mitigate the environmental impact needed establish biodegradation percentage. The thermal and structural changes of two plastic materials, a flexible film based on cassava starch - Poly(lactic acid) (PLA) and a semi-rigid cassava flour-stay cellulose fique fiber, were evaluated biodegradation under ISO 4855-1 standard. The tests were carried out for four weeks at constant temperature and flow of 58⯰C⯱â¯2⯰C and 250â¯mL/h, using a mature compost as inoculum. The percentages of CO2, thermal, morphological, and structural changes, variation of degradation temperatures, glass transition temperatures (Tg), Melting temperatures (Tm) and enthalpies of fusion (Hm), were properly evaluated as indicators of the materials biodegradation of two materials. Scanning electron microscopy (SEM), showed the microorganisms colonization on the materials surface, evidencing the appearance of cracks and microbial population. The flexible film showed a biodegradation percentage of 98.24â¯%, the semi-rigid tray 89.06â¯%, and the microcrystalline cellulose, 81.37â¯%.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Starch
/
Biodegradation, Environmental
/
Composting
/
Cellulose
Language:
En
Journal:
Int J Biol Macromol
Year:
2024
Document type:
Article
Country of publication:
Países Bajos