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Reprocessing Of 3d Printing Filament’s Fragment By Hydrolysis And Recycling Into The Formation Of Bioplastic
Journal
Materials Today: Proceedings
Date Issued
2022
Author(s)
Nurin Zarifah Mohd Zairullisham
Umairah Hannan Ab Hakim
Hatika Kaco
Amilin Shahida Saadon
Mohd Shaiful Sajab
DOI
10.1016/j.matpr.2021.10.075
Abstract
Currently, additive manufacturing become an expanding industry which committing high demand of
plastic. Consequently, plastic waste generated will be increased exponentially. Polylactic acid (PLA)
and polyethylene terephthalate (PET) are extensively used polymer as the filament for 3D printing.
Therefore, the reprocessing of the fragments is necessary to reduce the plastic pollution. This study the
aims to investigate the conversion of PET to terephthalic acid (TPA) and its conversion breakthrough
via caustic soda hydrolysis. Meanwhile, the effect of PLA dissolution and its integration with glycerol
to produced bioplastic was investigated. Fragment of PET was undergone hydrolysis process at different
time and the conversion rate showed increment as prolong reaction time. TPA yield produced follow the
same trend of PET conversion. FTIR analysis proved the formation of TPA after the hydrolysis process due
to the formation of O–H and C–H which corresponding to the formation of carboxylic acid and ethylene
glycol of TPA. Concurrently, PLA was dissolved in chloroform at different time and mixed with glycerol
which acts as plasticizer to form PLA/glycerol plastic. It was found that the longer dissolution time, the
higher the percentage of PLA dissolved. From FTIR analysis, the functional group of PLA has changed indicated that the reaction between dissolved PLA and glycerol has been taken placed. The results indicate
that PET degradation can occur at low cost and on this basis. Ergo, this formation of valuable products
from waste polymers can be an alternative method in promoting reduced waste generation.
plastic. Consequently, plastic waste generated will be increased exponentially. Polylactic acid (PLA)
and polyethylene terephthalate (PET) are extensively used polymer as the filament for 3D printing.
Therefore, the reprocessing of the fragments is necessary to reduce the plastic pollution. This study the
aims to investigate the conversion of PET to terephthalic acid (TPA) and its conversion breakthrough
via caustic soda hydrolysis. Meanwhile, the effect of PLA dissolution and its integration with glycerol
to produced bioplastic was investigated. Fragment of PET was undergone hydrolysis process at different
time and the conversion rate showed increment as prolong reaction time. TPA yield produced follow the
same trend of PET conversion. FTIR analysis proved the formation of TPA after the hydrolysis process due
to the formation of O–H and C–H which corresponding to the formation of carboxylic acid and ethylene
glycol of TPA. Concurrently, PLA was dissolved in chloroform at different time and mixed with glycerol
which acts as plasticizer to form PLA/glycerol plastic. It was found that the longer dissolution time, the
higher the percentage of PLA dissolved. From FTIR analysis, the functional group of PLA has changed indicated that the reaction between dissolved PLA and glycerol has been taken placed. The results indicate
that PET degradation can occur at low cost and on this basis. Ergo, this formation of valuable products
from waste polymers can be an alternative method in promoting reduced waste generation.
Subjects