Cleaner Bio-Based Plasticizer Synthesis from Waste Cooking Oil to Substitute Toxic Dioctyl Phthalate in PVC Film

Chompoonut Chaiyaraksa; Pongsert Sriprom; Fahana Boonkaen; Arthittaya Laemsri; Arnita Smingkaew; Wasan Chokelarb; Pornsawan Assawasaengrat

doi:10.4028/p-TZf0tB

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Synthesis of Epoxidized Waste Cooking Oil as Plasticizer in the Production of Xyloglucan-Chitosan Films
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Optimized Adsorption of Aqueous Cu (II) Ions Using Novel Microwave-Extracted Sodium Alginate from Brown Seaweed (Sargassum sp.)
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Cleaner Bio-Based Plasticizer Synthesis from Waste Cooking Oil to Substitute Toxic Dioctyl Phthalate in PVC Film

Abstract:

This research aimed to investigate the possibility of synthesizing a bio-based plasticizer from waste cooking oil using an epoxidation reaction to replace dioctyl phthalate (DOP) in PVC film, which is toxic and hazardous to human health and the environment. This involved synthesizing used household oil through an epoxidation reaction to introduce epoxy groups, followed by isopropyl alcohol to break the epoxy rings and form hydroxyl groups. The chemical structure of the epoxidized waste cooking oil plasticizer was analyzed using Fourier transform infrared spectroscopy (FT-IR), with a focus on confirming the presence of epoxy groups within the 3,500 – 3,000 cm^-1 range. Subsequently, this bio-based plasticizer was used in various ratios to DOP to produce PVC films, including ratios of 5:0, 4:1, 3:2, 2:3, 1:4, and 0:5. These PVC films were subject to a comprehensive examination of their physical and chemical properties, including their resistance to tensile stress, elongation ability, the impact on molecular functional groups in the PVC film, and a leaching test. The results showed that the optimal proportion of epoxidized waste cooking oil plasticizer to DOP was 5:0. This ratio demonstrated superior tensile strength, enhanced elongation capacity, increased thermal stability, and exhibited the most robust resistance against solvents compared to other ratios tested.

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Periodical:

Key Engineering Materials (Volume 1017)

Pages:

103-108

DOI:

https://doi.org/10.4028/p-TZf0tB

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Online since:

June 2025

Authors:

Chompoonut Chaiyaraksa, Pongsert Sriprom*, Fahana Boonkaen, Arthittaya Laemsri, Arnita Smingkaew, Wasan Chokelarb, Pornsawan Assawasaengrat

Keywords:

Epoxidation, Plasticizer, PVC Film, Waste Cooking Oil

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