Cellulose based systems for thermal insulation in buildings

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The CUBE - fixed flocs.

The main objective of the project is the development of a modified cellulose material with thermal conductivity characteristic comparable to those of less ecological insulation materials. In the long term, the market share of cellulose based insulating systems is expected to double. The newly developed material would make it possible to get the material approved as insulator in multi-story wood constructions. Indeed, from next year flammable materials will only be approved, only if a suitable non-toxic fire protection agent is used, and if the material remains in the compartment, without collapsing. This issue will play a crucial role, especially in those buildings complying with Eco-standards.

Desired improvements in properties are the following:

  • 10% reduction in thermal conductivity (0.033 W/mK).
  • Preserving the fire protection behavior BKZ 5.3 (according to European classification bS2d0), without the addition of boron compounds and or other substances, with are problematic according to REACH.
  • Achieving better compactness of the material in the compartment, to prevent the disintegration of the insulation material in case of fire. This makes it possible to use Isofloc cellulose in multi-story timber construction.
  • Biocidal additives that are not classified as problematic by REACH in alternative to boron and other classical biocides.

Contact
Franziska Grüneberger,

Partner
isofloc AG

Funding
Commission for Technology and Innovation CTI / Innosuise
Project Number 16934.2 PFIW-IW

Publications

 

Status: completed

Development of microfibrillated cellulose-based porous materials in consideration of industrial relevant processes.

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Inside a cellulose foam.

The objective of this project is to engineer cellulose-based porous materials, which can be used for various sorption applications for liquids. By tailoring the porosity and surface chemistry of these novel three-dimensional cellulosic structures, the hydrophilicity and oleophilicity of the final product will be tuned and optimized. The development and engineering of the sorbents take place with regard to industrial relevant processes and scalability.

 

 

 

 

Contact
Carlo Antonini (University of Milano-Bicocca), Thomas Geiger

Partner
ETH Zürich, Laboratory of Food Process Engineering (Judith Wemmer, Prof. Erich Windhab)
Weidmann Fiber Technology

Funding
Commission for Technology and Innovation CTI / Innosuise
Project Number 18731.2 PFNM-NM

Publication

  • Josset, S.; Hansen, L.; Orsolini P.; Griffa M.; Kuzior O.; Weisse, B.; Zimmermann T.; Geiger, T. Microfibrillated cellulose foams obtained by a straightforward freeze–thawing–drying procedure Cellulose 24 (2017) 3825–3842 doi:10.1007/s10570-017-1377-8
  • Antonini, C.; Nylen, O.; Geiger, T., High porosity cellulose-​based foams by ice-​templating, Abstracts of Papers, 255th ACS National Meeting & Exposition, New Orleans, LA, United States, March 18-22, 2018, American Chemical Society, 2018, p. CELL-430
  • Geiger T.; Josset S.; Hansen L.; Antonini, C., High porosity cellulose-based foams by ice-templating. Bio-Based Polymers and Composites (BiCoPo), 4th International Conference, September 2-6, 2018, Balatonfüred, Hungary
  • Antonini, C.; Wu, T.; Zimmermann T.; Kherbeche A.; Thoraval M.-J.; Nyström, G., Geiger, T. Ultra-porous nanocellulose foams with tailored wetting properties. EMRS Fall meeting, Sept 2019, Warsaw, Poland, submitted
  • Antonini, C.; Wu T.; Zimmermann, T.; Kherbeche, A.; Thoraval, M-J.; Nyström, G.; Geiger, T. Ultra-porous nanocellulose foams: a facile and scalable fabrication approach, Nanomaterials 9 (2019) 1142; doi:10.3390/nano9081142
  • Antonini, C.; Truniger, S.; Geiger, T. Method of preparing a nano- and/or microscale cellulose foam WO2020114634

 

Status: completed

3D-Printing (3DP) of cellulose powder

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3D printed demonstrator

This project aims to 3D print cellulose. The printed parts consist only of cellulose powder mixed with cellulose ethers as binding agents. Similarly to binder jetting, successive layers of this mixture are spread out. Using an industrial inkjet print head from Fujifilm-Dimatix, isopropanol is selectively deposited on each of the powder layers. Isopropanol dissolve the binder and stick the cellulose particles together. The produced parts are fragile and require a post-treatment. A dedicated printer was devoloped and built for this project. Ongoing research is done on optimizing of the layer formation and drying to increase mechanical properties.

 

 

Contact
Thomas Geiger

Partner
College of Engineering and Architecture of Fribourg, iPrint (Mathieu Soutrenon, Gabriel Billato, Fritz Bircher)

Publication

  • Soutrenon M.; Billato G.; Bircher F.; Geiger T.; 3D Printing of Wood—Inkjet Printing of a Lignin based Ink on Cellulose, Printing for Fabrication 2018, 34th International Conference on Digital Printing Technologies (NIP), September 23-27, 2018, Dresden, Germany

  • Soutrenon M.; Castens Vitanov, K; Apebende, E., Geiger T.; Bircher, F.; 3D Printing of Ethylcellulose Implants by Solvent Jetting, Printing for Fabrication 2019, 35th International Conference on Digital Printing Technologies, NIP, September 29 - October 03,  San Francisco, USA

 

Status: completed

Solidified Cellulosic Structures

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Solid cellulose structure.

Within the framework of a feasibility study cellulosic structures specifically through optimized processes into high-strength biomaterials. These materials are used as an alternative to established materials and are intended to provide a for use in various industrial sectors.

 

 

 

 

 

Contact
, Thomas Geiger

Contact Partner
Institut für Werkstofftechnik und Kunststoffverarbeitung IWK (Karin Brändli HedlundGion Andrea Barandun)

Funding
Innosuisse - Swiss Innovation Agency
Project Number 39674.1 IP-EE

Publication

  • coming soon ...

 

Status: currently running

Cellulose-based filler for elastomeric compounds

The project focuses on the development of an industrial process for the synthesis of renewable fillers derived from chemical modified cellulose-derived material to be used as filler for elastomeric compounds and products.

 

Contact
Thomas Geiger

Partner
Dätwyler Switzerland Inc., Dätwyler Sealing Solutions (Mattia Lucchini)

Funding
Innosuisse - Swiss Innovation Agency
Project Number 37557.1 IP-ENG

Publication

  • comming soon

Status: currently running

Thermoformable wood wool products

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Wood wool.

Description coming soon ...

 

 

 

 

 

 

Contact
Thomas Geiger

Partner
 

Funding

 

Publication

 

Status: ready for take off

Polymer-bound bio-granulate foam

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Bio granulate foam.

Description coming soon ...

 

 

 

 

 

 

 

 

Contact
Thomas Geiger

Partner
 

Funding

 

Publication

 

Status: ready for take off