20.500.12556/RUL-135627 Analysis of PLA composite filaments reinforced with lignin and polymerised-lignin-treated NFC Polylactic acid (PLA) is one of the most suitable materials for 3D printing. Blending with nanoparticles improves some of its properties, broadening its application possibilities. The article presents a study of composite PLA matrix filaments with added unmodified and lignin/polymerised lignin surface-modified nanofibrillated cellulose (NFC). The influence of untreated and surfacemodified NFC on morphological, mechanical, technological, infrared spectroscopic, and dynamic mechanical properties was evaluated for different groups of samples. As determined by the stereo and scanning electron microscopy, the unmodified and surface-modified NFCs with lignin and polymerised lignin were present in the form of plate-shaped agglomerates. The addition of NFC slightly reduced the filaments’ tensile strength, stretchability, and ability to absorb energy, while in contrast, the initial modulus slightly improved. By adding NFC to the PLA matrix, the bending storage modulus (E’) decreased slightly at lower temperatures, especially in the PLA samples with 3 wt% and 5 wt% NFC. When NFC was modified with lignin and polymerised lignin, an increase in E’ was noticed, especially in the glassy state. polymer composites nanofibrillated cellulose lignin polymerised lignin agglomeration polimerni kompoziti nanofibrilirana celuloza lignin polimerizirani lignin strnjevanje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-03-22 13:24:26 2022-03-22 13:24:28 2022-09-14 04:14:20 0000-00-00 00:00:00 2021 0 0 24 str. iss. 13, art. 2174 Vol. 13 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677 2073-4360 10.3390/polym13132174 69691651 RAZ_Gregor-Svetec_Diana_2021.pdf RAZ_Gregor-Svetec_Diana_2021.pdf 1 45C0ACD1611128619B9D1F15216C84F6 293f3dc47ebe57faa1d954d187d79f079cfad6e4aca9bb28c295fbf9ad0ce492 5b3ceef5-a9db-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154820 https://www.mdpi.com/2073-4360/13/13/2174 1 045028f2-a9db-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154819 Naravoslovnotehniška fakulteta 0 0 0