Biowelding 3D-printed biodigital brick of seashell-based biocomposite by pleurotus ostreatus mycelium
Author
Abdallah, Yomna K.
Estévez, Alberto T.
Publication date
2023ISSN
2313-7673
Abstract
Mycelium biocomposites are eco-friendly, cheap, easy to produce, and have competitive mechanical properties. However, their integration in the built environment as durable and long-lasting materials is not solved yet. Similarly, biocomposites from recycled food waste such as seashells have been gaining increasing interest recently, thanks to their sustainable impact and richness in calcium carbonate and chitin. The current study tests the mycelium binding effect to bioweld a seashell biocomposite 3D-printed brick. The novelty of this study is the combination of mycelium and a non-agro–based substrate, which is seashells. As well as testing the binding capacity of mycelium in welding the lattice curvilinear form of the V3 linear Brick model (V3-LBM). Thus, the V3-LBM is 3D printed in three separate profiles, each composed of five layers of 1 mm/layer thickness, using seashell biocomposite by paste extrusion and testing it for biowelding with Pleurotus ostreatus mycelium to offer a sustainable, ecofriendly, biomineralized brick. The biowelding process investigated the penetration and binding capacity of the mycelium between every two 3D-printed profiles. A cellulose-based culture medium was used to catalyse the mycelium growth. The mycelium biowelding capacity was investigated by SEM microscopy and EDX chemical analysis of three samples from the side corner (S), middle (M), and lateral (L) zones of the biowelded brick. The results revealed that the best biowelding effect was recorded at the corner and lateral zones of the brick. The SEM images exhibited the penetration and the bridging effect achieved by the dense mycelium. The EDX revealed the high concentrations of carbon, oxygen, and calcium at all the analyzed points on the SEM images from all three samples. An inverted relationship between carbon and oxygen as well as sodium and potassium concentrations were also detected, implying the active metabolic interaction between the fungal hyphae and the seashell-based biocomposite. Finally, the results of the SEM-EDX analysis were applied to design favorable tessellation and staking methods for the V3-LBM from the seashell–mycelium composite to deliver enhanced biowelding effect along the Z axis and the XY axis with <1 mm tessellation and staking tolerance.
Document Type
Article
Document version
Published version
Language
English
Subject (CDU)
72 - Architecture
Keywords
Biosoldadura
Biocompost a base de petxines
Extrusió de pasta
Maó imprès en 3D
Maó elàstic
Maó de miceli
Medi a base de cel·lulosa
Arquitectura viva
Pleurotus ostreatus
Biosoldadura
Biocompuesto a base de conchas marinas
Extrusión de pasta
Ladrillo impreso en 3D
Ladrillo elástico
Ladrillo de micelio
Medio a base de celulosa
Arquitectura viva
Pleurotus ostreatus
Bio-welding
Seashell-based biocomposite
Paste extrusion
3D-printed brick
Elastic brick
Mycelium brick
Cellulose-based medium
Living architecture
Pleurotus ostreatus
Pages
32
Publisher
MDPI
Collection
8
Is part of
Biomimetics
Citation
Abdallah, Yomna K.; Estévez, Alberto T. Biowelding 3D-printed biodigital brick of seashell-based biocomposite by pleurotus ostreatus mycelium. Biomimetics, 2023, 8(6), 504. Disponible en: <https://www.mdpi.com/2313-7673/8/6/504>. Fecha de acceso: 19 dic. 2023. DOI: 10.3390/biomimetics8060504
This item appears in the following Collection(s)
- Arquitectura [36]
Rights
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/