[article]
| Titre : |
Bio-based flooring adhesive modeled on spider silk |
| Type de document : |
texte imprimé |
| Auteurs : |
Lorenzo Tomei, Auteur ; Daniela Leistl, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 26-31 |
| Langues : |
Multilingue (mul) |
| Catégories : |
Adhésifs biologiques
Biomatériaux
Chlorure de polyvinyle
Revêtements de sols
Soie d'araignéeLes fibres de soie sont formées de fibroïnes (protéines filamenteuses, appelées aussi spidroïnes2, composées de copolymères à blocs hydrophiles et hydrophobes) constituées à 25-30 % d'alanine et à 40% de glycine.
La soie d'araignée est un polymère dont la configuration moléculaire peut varier et rapidement s'adapter à la température et à l'humidité, ce qui fascine les chercheurs en biomimétique ou en robotique.
La soie d'araignée est notamment capable de « Supercontraction » (de 10 à 140 MPa de tension) quand elle s'humidifie (en plusieurs minutes quand l'hygrométrie dépasse 70 %), et plus rapidement quand elle est subitement mouillée. C'est ainsi que les toiles peuvent résister à la pluie, et au poids de la rosée voire accumuler plusieurs grammes d'eau sous forme de gouttes, à partir de la bruine par exemple. La thermostabilité varie aussi selon le degré de supercontraction
Structures multicouches
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Adhesives have to meet a wide variety of requirements that range from high levels of adhesion to easy removability. However, it is hard to achieve both these properties at the same time. In the case of floor coverings, the emphasis is often on adhesion, which can make the flooring difficult to remove. In addition, fossil-based adhesives raise concerns about sustainability and recycling. One solution to these problems is a bio-based adhesive system. |
| Note de contenu : |
- The biological principle for the adhesive application
- The versatility of plant-based raw materials
- Plant waxes guarantee adhesion
- Creation of a bio-based prototype
- Fig. 1 : PVC is a material which is widely used in floor coverings, but which usually requires the use of fossil-based adhesives to create a lasting bond
- Fig. 2 : Spider webs are sophisticated naturel solutions for catching prey. Their biological principle is based on adhesion
- Fig. 3 : Model of the adhesive mechanism of cribellate spider webs (right) compared with ecribellate spider webs with spider glue (left), as described by Bott et al. (2017)
- Fig. 4 : Fibers of a cribellate spider web (A) and nanofibrils that form the convoluted nanoporous structure (B, C), as described by Hawthorn et al. (2003)
- Fig. 5 : The foaming capacity and foam stability of plant proteins allows the formation microscopic air bubbles that replicate the porosity of the cribellate spider web threads in the final structure
- Fig. 6 : The structure of the plant protein foam, with additives made from cellulose and its derivatives, after thermal stabilization
- Fig. 8 : The individual elements of the bonded system as a prototype in A4 format : screed, plant was emulsion, PVC floor covering coated withthe stabilized protein foam
- Fig. 9 : Cross section of the A4 prototype showing the structure of the layers
- Fig. 10 :Assembly of the bonded system starting with a PVC floor covering coated with the biomimetic spider web and finishing with the bonding of the floor covering to the screed using the tried-and-tested biological principle
- Fig. 11 : The bio-based adhesive is a multilayer system that quarantees adequate adhesion between the floor covering and the screed and removability for potential recycling |
| En ligne : |
https://drive.google.com/file/d/10sWyTDkd1x5cZpKEL31YKmH77k3f1Jco/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41191 |
in ADHESION - ADHESIVES + SEALANTS > Vol. 21, N° 2/2024 (2024) . - p. 26-31
[article]
|
Aller sur edunet
Accueil
Bio-based flooring adhesive modeled on spider silk in ADHESION - ADHESIVES + SEALANTS, Vol. 21, N° 2/2024 (2024)
