Cold Plasma-Induced Surface Modification of Microfibrillated Cellulose Using Lauric Acid to Enhance Compatibility in Polymer Composites

Annisa Rifathin; Ade Mundari Wijaya; Achmad Nandang Roziafanto; Joddy Arya Laksmono; Adam Febriyanto Nugraha; Mochamad Chalid

doi:10.22146/ijc.104738

Cold Plasma-Induced Surface Modification of Microfibrillated Cellulose Using Lauric Acid to Enhance Compatibility in Polymer Composites

https://doi.org/10.22146/ijc.104738

Annisa Rifathin⁽¹⁾, Ade Mundari Wijaya⁽²⁾, Achmad Nandang Roziafanto⁽³⁾, Joddy Arya Laksmono⁽⁴⁾, Adam Febriyanto Nugraha⁽⁵⁾, Mochamad Chalid^(6*)

(1) Green Polymer Technology Laboratory, Department of Metallurgical and Material Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia; Research Center for Polymer Technology, National Research and Innovation Agency (BRIN), Jl. Raya Puspiptek 60, Setu, Tangerang Selatan 15314, Indonesia
(2) Research Center for Polymer Technology, National Research and Innovation Agency (BRIN), Jl. Raya Puspiptek 60, Setu, Tangerang Selatan 15314, Indonesia
(3) Department of Food Nanotechnology, Politeknik AKA Bogor, Jl. Pangeran Sogiri No. 283, Bogor 16154, Indonesia
(4) Research Center for Polymer Technology, National Research and Innovation Agency (BRIN), Jl. Raya Puspiptek 60, Setu, Tangerang Selatan 15314, Indonesia
(5) Green Polymer Technology Laboratory, Department of Metallurgical and Material Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia; Center for Sustainability and Waste Management, Universitas Indonesia, Depok 16424, Indonesia
(6) Green Polymer Technology Laboratory, Department of Metallurgical and Material Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia; Center for Sustainability and Waste Management, Universitas Indonesia, Depok 16424, Indonesia
(*) Corresponding Author

Abstract

Green materials, such as microfibrillated cellulose (MFC), are increasingly used as fillers in polymer composites for academic and industrial applications. However, their inherent hydrophilic property limits compatibility with polymer matrix. This study employs an environmentally friendly cold plasma technique to modify the surface of MFC, improving its compatibility with the polymer. Plasma treatment was performed at a voltage of 60 V for 30 min by making three molar ratios (3:1, 4:1, and 5:1) between lauric acid as a hydrophobic precursor and anhydroglucose (AGU). The results indicate several changes in the modified MFC properties, as evidenced by the appearance of a new peak at a wavenumber of 1742 cm⁻¹ (ester’s C=O) in FTIR spectra, indicating successful plasma-induced grafting. XPS results also confirm the formation of O–C=O bond at a binding energy of 289.3 eV. The optimum conditions were obtained at a molar ratio of 4:1 (lauric acid:AGU). There was a decrease in the hydrophilic property of MFC, indicated by an increase in the water contact angle from 50.16° to 71.26°. Moreover, the surface tension difference between MFC and polypropylene was significantly reduced from 136.99 to 47.51%, suggesting improved compatibility.

Keywords

microfibrillated cellulose; surface modification; cold plasma; compatibility

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DOI: https://doi.org/10.22146/ijc.104738