Formulation Of Green Printing Ink From Waste Cooking Oil For Digital Printing

Mohammad Ali, Nur Fatihatur Rawdhah (2019) Formulation Of Green Printing Ink From Waste Cooking Oil For Digital Printing. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Petroleum-based ink is a non-renewable and non biodegradable material, and the consumption of petroleum based ink is environmentally bad due to the high volatile organic compound (VOC) emissions. To encounter the problem, more printing inks production based on renewable and biodegradable resources have been successfully formulated and produced. One of the alternatives is by using vegetable oil (VO) to produce vegetable oil-based inks. This study is exceptionally beneficial but the competition between printing ink industry and food industry may happen and so researchers tried to use the accumulated waste of used cooking oil coming from the food industry to substitute vegetable oil as the raw materials in printing ink. The previous study shows that the printing ink from waste cooking oil (WCO) is applicable for screen printing on a ceramic substrate. The objective of this research is to obtain a lower viscosity green printing ink (GPI) to be applied in digital printing using transesterification process to achieve a viscosity of between 1-30cP which is not studied in previous work. The mixture composition of green printing ink from previous work of Sisubalan (2018) which consist of binder, pigment, solvent and additive producing 1000cP ink is only applicable to silk printing application on ceramic substrate and thus it is crucial to have comprehensive understanding on the correlation between composition of green printing ink with its properties for a wider printing application. From this research, transesterification reaction with 3:1 molar ratio of methanol to oil produce the lowest viscosity of methyl ester as binder and the mixture of ink composed of methyl ester, carbon black as colorants, and CTAB as surfactant in the designated composition able to achieve Green Printing Ink with viscosity suit for inkjet printing with lower C-H bond as analysed by FTIR spectra. The research results in the success in utilizing waste cooking oil to produce ink for digital printing with good printed image result.

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