Novel investigation of the water transport in porous cellulose fibre networks using neutron imaging
|Coordinator||Lunds universitet - Avdelningen för Hållfasthetslära|
|Funding from Vinnova||SEK 498 000|
|Project duration||November 2018 - November 2019|
|Venture||Research infrastructure - utilisation and collaboration|
|Call||Research infrastructure - utilisation and collaboration: Industrial pilot projects for neutron and photon experiments at large scale research infrastructures - 2018|
Purpose and goal
It is well known that uptake of water affects the geometrical dimensions and mechanical properties of cellulose fibre network materials, such as paper and paperboard. However, the water transport processes in such materials are still not well understood, particularly not the influence of fibre swelling, sizing (water resistance treatment) and creasing (delamination treatment) on the water transport dynamics. This project aims at enhancing the understanding of in-plane water transport in paper-based materials.
Expected results and effects
The project consortium consists of Lund University and BillerudKorsnäs AB. The project will deliver valuable knowledge to the consortium’s development of physically-based material models for paper and board subjected to ambient climate loading. Such models can be used to reduce raw material and energy consumption in production of packaging materials and packages, decrease food waste in packaging value chains and replace oil-based packaging materials with renewable cellulose-based alternatives.
Planned approach and implementation
Water barrier laminated paperboard samples that have undergone different sizing and creasing treatments will be investigated. Test pieces will be subjected to controlled edge wetting, while water transport dynamics (neutron imaging) and out-of-plane swelling (x-ray tomography) is simultaneously monitored. Such experiments cannot be performed using conventional measurement methods due to insufficient time and space resolution. The intention is to carry out the experiments using the D50 beamline at the research facility of Institut Laue-Langevin (ILL) in Grenoble, France.