Method of making a product with a micro or nano sized structure and product
First Claim
1. A method of making a product with a micro to nano sized structure using a mould having a corresponding structure at a mould surface in which a fluid containing a casting material is brought into contact with said mould surface characterised in that the fluid is subjected to a treatment to induce phase separation therein, in that the said casting material is at least partially solidified on the mould surface and in that the resulting product is released from the mould surface.
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Abstract
Using phase separation technique perforated as well as non-perforated polymeric structures can be made with high aspect ratios (>5). By varying the phase separation process the properties (e.g. porous, non-porous, dense, open skin) of the moulded product can be tuned. Applications are described in the field of micro fluidics (e.g. micro arrays, electrophoretic boards), optics, polymeric solar cells, ball grid arrays, and tissue engineering.
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Citations
28 Claims
- 1. A method of making a product with a micro to nano sized structure using a mould having a corresponding structure at a mould surface in which a fluid containing a casting material is brought into contact with said mould surface characterised in that the fluid is subjected to a treatment to induce phase separation therein, in that the said casting material is at least partially solidified on the mould surface and in that the resulting product is released from the mould surface.
- 12. Moulded product having a nano or micro porous base structure being at least partly covered by a substantially more dense skin layer.
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28. Spinneret provided with a micro to nano structure.
Specification