In:
Journal of Polymers and the Environment, Springer Science and Business Media LLC, Vol. 31, No. 2 ( 2023-02), p. 698-708
Abstract:
We present a study of the controlled biodegradation of polylactic acid (PLA) reinforced with high lignin containing microfibrillated cellulose (MFLC) isolated from chemi-thermomechanical pulp. The surface of MFLC was modified using an acetylation method to decrease its polarity. Biocomposites with different MFLC and acetylated MFLC (Ac-MFLC) contents were fabricated via a solvent casting method. The biodegradation of biocomposites was performed by burying in soil and holding at 45 ° C for 30 days. After soil burial, MFLC/biocomposites exhibited higher weight loss (5.4 %) compared to neat PLA (4.2 %) and Ac-MFLC/biocomposites (4.6 %). Morphological analysis results showed surface erosion of the PLA to change with the addition MFLC and Ac-MFLC, resulting in porous formations on the surface of biocomposites. These formations led to the loosening of microfibril-PLA interface in the internal structure, resulting in a significant decrease in the storage modulus of biocomposites. The biocomposites exhibited no antimicrobial properties, confirming their biotic degradability. Graphical Abstract
Type of Medium:
Online Resource
ISSN:
1566-2543
,
1572-8919
DOI:
10.1007/s10924-022-02583-2
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2017207-2
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