Colour fastness to various agents and dynamic mechanical characteristics of biocomposite filaments and 3D printed samples

Muck, Deja (author), Gabrijelčič Tomc, Helena (author), Stanković Elesini, Urška (author), Ropret, Maruša (author), Leskovšek, Mirjam (author)

The aim of the study was to analyse the colour fastness of 3D printed samples that could be used as decorative or household items. Such items are often fabricated with 3D printing. The colour of filaments affects not only the mechanical properties, but also the appearance and user satisfaction. Samples of biocomposite filaments (PLA and PLA with added wood and hemp fibres) were used. First, the morphological properties of the filaments and 3D printed samples were analysed and then, the colour fastness against different agents was tested (water, oil, detergent, light and elevated temperature). Finally, the dynamic mechanical properties of the filaments and 3D printed samples were determined. The differences in the morphology of the filaments and 3D printed samples were identified with SEM analysis. The most obvious differences were observed in the samples with wood fibres. All printed samples showed good resistance to water and detergents, but poorer resistance to oil. The sample printed with filaments with added wood fibres showed the lowest colour fastness against light and elevated temperatures. Compared to the filaments, the glass transition of the printed samples increased, while their stiffness decreased significantly. The lowest elasticity was observed in the samples with wood fibres. The filaments to which hemp fibres were added showed the reinforcement effect. Without the influence on their elasticity, the printed samples can be safely used between 60 and 65 °C.

• Language: English
• Keywords: biocomposites, PLA, wood fibres, hemp fibres, 3D printing, colour fastness, dynamic mechanical analysis
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 21 str.
• Numbering: Vol. 13, iss. 21, art. 3738
• PID: 20.500.12556/RUL-136430
• UDC: 655.1:677
• ISSN on article: 2073-4360
• DOI: 10.3390/polym13213738
• COBISS.SI-ID: 82934275
• Publication date in RUL: 04.05.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.11.2021

Secondary language

• Language: Slovenian
• Keywords: biokompoziti, PLA, lesna vlakna, konopljina vlakna, 3D tisk, barvne obstojnosti, dinamično mehanska analiza

Projects

• Funder: EC - European Commission
• Funding programme: EU Structural Funds, Potential of biomass for development of advanced materials and bio-based products
• Name: Discarded potentials of biomass
• Acronym: Cel.Cycle