https://m2.mtmt.hu/ hun 2026-10-23 07:46 JournalArticle 35422527 VALIDATED true Department of Materials Science and Engineering, Széchenyi István University, Egyetem tér 1, Győr, H-9026, Hungary Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Export Date: 09 January 2025; Cited By: 1; Correspondence Address: L. Lendvai; Győr, Egyetem tér 1., H-9026, Hungary; email: lendvai.laszlo@sze.hu 0 false 2026-10-06T10:30:19.061+0000 2025-02-26T12:14:11.544+0000 2024-09-26T17:33:46.156+0000 true 10047029 Lendvai László /api/author/10047029 Author true 10047029 2026-09-15T10:02:57.616+0000 2025-03-18T07:19:02.062+0000 true 521 Szuper Admin /api/admin/521 Admin true Admin 10013962 /api/admin/10013962 Vasvari Lilian true 10013962 true 2025-04-24T15:35:29.896+0000 true false true 24 24 /api/publicationtype/24 PublicationType 1 true 24 JournalArticle true 10000059 Article true 24 24 /api/publicationtype/24 PublicationType 1 true 24 JournalArticle /api/subtype/10000059 Szakcikk SubType 101 true 10000059 true 1 /api/category/1 Category true 1 Lendvai, László Influence of environmental humidity during filament storage on the structural and mechanical properties of material extrusion 3D-printed poly(lactic acid) parts true true /api/journal/20071398 REVIEWED true false false 20071398 true 2590-1230 2590-1230 Journal FOREIGN 24 103013 103013 11 2024 Material extrusion (MEX) is one of the most widely used additive manufacturing techniques these days. This study investigates how the properties of MEX 3D-printed objects depend on the relative humidity (RH) conditions in which filaments are stored before and during the manufacturing process. Poly(lactic acid) (PLA) filament was drawn directly from a humidity-controlled chamber into the MEX 3D printer’s nozzle. For each set of samples, the filaments were conditioned under different RH conditions, ranging from 10% to 90%. The macrostructure of the fabricated products was characterized using computed tomography, revealing increased porosity at higher RH values (from 0.84% to 4.42%). The increased porosity at higher storage RH is attributed to under-extrusion and volatile entrapment due to excess moisture. With growing storage RH, the melt flow rate of PLA also gradually increased, indicating a plasticizing effect of humidity on the biopolymer. Gel permeation chromatography and differential scanning calorimetry analyses were conducted to determine whether hydrolytic chain scission took place when PLA was processed in the presence of excessive moisture. Neither measurement indicated any considerable alteration in molecular integrity and crystalline structure as a function of storage RH. Mechanical tests, however, revealed a reduced load-bearing capacity of the manufactured PLA specimens. Flexural strength decreased from 103.0 to 99.6 MPa, and the impact strength dropped from 18.2 to 16.2 kJ/m2, which is ascribed to the increasing size of pores inside the specimens with increasing storage RH. These findings should be taken into account when designing and processing PLA products by MEX-based additive manufacturing. 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10.3109/03639049709146155 false true Reference 58133032 /api/reference/58133032 65 10.1002/pi.5707 false true Reference 58133033 /api/reference/58133033 66 false true Reference 58133034 /api/reference/58133034 67 10.1016/j.arabjc.2023.104695 false true Reference 58133035 /api/reference/58133035 68 false true /api/publication/35422527 <div class="JournalArticle Publication long-list"> <div class="authors"> <img title="Forrásközlemény" style="float: left" src="/frontend/resources/grid/publication-core-icon.png"> <img title="Idézőközlemény" style="float: left" src="/frontend/resources/grid/publication-citation-icon.png"> <div class="autype autype0"> <span class="author-name" mtid="10047029"><a href="/gui2/?type=authors&mode=browse&sel=10047029" target="_blank">Lendvai László ✉ (<span class="authorship-author-name">Lendvai László</span> <span class="authorAux-mtmt"> Polimer anyagtudomány</span>) </a> </span> <span class="author-affil"><span title="Széchenyi István Egyetem">SZE</span>/<span title="AUDI Hungaria Járműmérnöki Kar">AHJK</span>/Anyagtudományi és Technológiai Tanszék</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10055820"><a href="/gui2/?type=authors&mode=browse&sel=10055820" target="_blank">Fekete Imre (<span class="authorship-author-name">Fekete Imre</span> <span class="authorAux-mtmt"> Anyagtudomány</span>) </a> </span> <span class="author-affil"><span title="Széchenyi István Egyetem">SZE</span>/<span title="AUDI Hungaria Járműmérnöki Kar">AHJK</span>/Anyagtudományi és Technológiai Tanszék</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10088349"><a href="/gui2/?type=authors&mode=browse&sel=10088349" target="_blank">Jakab Sándor Kálmán (<span class="authorship-author-name">Jakab Sándor Kálmán</span> <span class="authorAux-mtmt"> Polimertechnológiák</span>) </a> </span> <span class="author-affil"><span title="Széchenyi István Egyetem">SZE</span>/<span title="AUDI Hungaria Járműmérnöki Kar">AHJK</span>/Anyagtudományi és Technológiai Tanszék</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10014721"><a href="/gui2/?type=authors&mode=browse&sel=10014721" target="_blank">Szarka Györgyi (<span class="authorship-author-name">Szarka Györgyi Éva</span> <span class="authorAux-mtmt"> Polimer kémia</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/<span title="Anyag- és Környezetkémiai Intézet">AKI</span>/Polimer Kémiai és Fizikai Kutatócsoport; <span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/Anyag- és Környezetkémiai Intézet</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10014722"><a href="/gui2/?type=authors&mode=browse&sel=10014722" target="_blank">Verebélyi Klára (<span class="authorship-author-name">Verebélyi Klára</span> <span class="authorAux-mtmt"> Polimerkémia</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/Anyag- és Környezetkémiai Intézet; <span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/<span title="Anyag- és Környezetkémiai Intézet">AKI</span>/Polimer Kémiai és Fizikai Kutatócsoport</span> ;&nbsp;&nbsp;&nbsp; <span class="author-name" mtid="10001274"><a href="/gui2/?type=authors&mode=browse&sel=10001274" target="_blank">Iván Béla (<span class="authorship-author-name">Iván Béla</span> <span class="authorAux-mtmt"> Polimerkémia, anyagtudomány, nanoszerkezetek</span>) </a> </span> <span class="author-affil"><span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/Anyag- és Környezetkémiai Intézet; <span title="HUN-REN Természettudományi Kutatóközpont">HRN TTK</span>/<span title="Anyag- és Környezetkémiai Intézet">AKI</span>/Polimer Kémiai és Fizikai Kutatócsoport</span> </div> </div> <div class="title"><a href="/gui2/?mode=browse&params=publication;35422527" target="_blank">Influence of environmental humidity during filament storage on the structural and mechanical properties of material extrusion 3D-printed poly(lactic acid) parts</a></div> <div> <span class="journal-title">RESULTS IN ENGINEERING</span> <span class="journal-issn">(<a target="_blank" href="https://portal.issn.org/resource/ISSN/2590-1230">2590-1230</a> <a target="_blank" href="https://portal.issn.org/resource/ISSN/2590-1230">2590-1230</a>)</span>: <span class="journal-volume">24</span> <span class="page"> Paper 103013. 11 p. </span> <span class="year">(2024)</span> </div> <div class="pub-footer"> <span class="language" xmlns="http://www.w3.org/1999/html">Nyelv: Angol | </span> <span class="identifiers"> <span class="id identifier oa_GOLD" title=" Gold "> <a style="color:blue" title="10.1016/j.rineng.2024.103013" target="_blank" href="https://doi.org/10.1016/j.rineng.2024.103013"> DOI </a> </span> <span class="id identifier oa_GOLD" title=" Gold "> <a style="color:black" title="206271" target="_blank" href="https://real.mtak.hu/206271"> REAL </a> </span> <span class="id identifier oa_none" 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class="citingPub-count">Nyilvános idéző összesen: 29</span> | Független: 26 | Függő: 3 | Nem jelölt: 0 | WoS jelölt: 16 | Scopus jelölt:&nbsp;10 | WoS/Scopus jelölt:&nbsp;17 | DOI jelölt:&nbsp;27 </div> <div class="publication-citation"> <a target="_blank" href="/api/publication?cond=citations.related;eq;35422527&sort=publishedYear,desc&sort=title"> Idézett közlemények száma: 6 </a> </div> <div class="mtid"><span class="long-pub-mtid">Közlemény: 35422527</span> | <span class="status-data status-VALIDATED"> Egyeztetett </span> Forrás Idéző | <span class="type-subtype">Folyóiratcikk ( Szakcikk ) </span> | <span class="pub-category">Tudományos</span> | <span class="publication-sourceOfData">kézi felvitel</span> </div> <div class="funder"> (Bolyai János Kutatási Ösztöndíj) Támogató: MTA, (TKP2021-NVA-23) </div> <div class="lastModified">Utolsó módosítás: 2025.02.26. 13:14 Ladányi Gusztáv (MTMT API user, admin) </div> <div class="lockedBy">Központi kezelésű 2025.04.24. 17:35 Vasvari Lilian (MTMT Központ, admin) </div> <pre class="comment" style="margin-top: 0; margin-bottom: 0;"><u>Megjegyzés</u>: Department of Materials Science and Engineering, Széchenyi István University, Egyetem tér 1, Győr, H-9026, Hungary Polymer Chemistry and Physics Research Group, Institute of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar tudósok krt. 2, Budapest, H-1117, Hungary Export Date: 09 January 2025; Cited By: 1...</pre> </div></div>