The project shall develop a new generation of rigid, crosslinked foam based on PVC and isocyanates used as core material in the construction of blades for wind mills. The main requirement on the core material in shells is to withstand buckling and the maj or material parameters involved in buckling are shear and compression modulus. To be able to produce larger and more efficient wind mills reducing weight of the construction is a key challenge. The main objective of the project is to maintain mechanical s trength of the core material with a 30% reduction in weight.
A secondary goal is to increase process heat stability and increase operation temperature of the core material and to reduce the sustainability footprint of the core material.
A radical approa ch is taken to modify foam density by introducing nano sized materials that will interfere with the foaming process and contribute to the strength of the resulting core material. The most critical R&D challenge is to design this multiphase system in such a way that synergetic effects are produced where both foam process and heat stability are optimised by the action of a proper modified nano material. It is also a challenge to introduce nano sized materials into the compound consisting of PVC and isocyan ates without affecting the size of the nano material.
To improve sustainability focus is on material consumption, reduced chemical consumption and energy.
If successful a new generation of core material will give the opportunity to produce substantiall y larger cost competitive wind mills. Larger wind mills will give higher efficiency and improved visual appearance in the landscape.