US 12,259,650 B2
Structured nanoporous materials, manufacture of structured nanoporous materials and applications of structured nanoporous materials
Easan Sivaniah, Kyoto (JP); Masateru Ito, Kyoto (JP); and Daisuke Yamamoto, Kyoto (JP)
Assigned to KYOTO UNIVERSITY, Kyoto (JP)
Appl. No. 16/979,367
Filed by KYOTO UNIVERSITY, Kyoto (JP)
PCT Filed Mar. 13, 2019, PCT No. PCT/JP2019/010416
§ 371(c)(1), (2) Date Sep. 9, 2020,
PCT Pub. No. WO2019/177067, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 1804010 (GB), filed on Mar. 13, 2018.
Prior Publication US 2021/0003915 A1, Jan. 7, 2021
Int. Cl. B29C 35/08 (2006.01); B29C 44/34 (2006.01); C08J 3/24 (2006.01); C08J 3/28 (2006.01); C08J 7/02 (2006.01); G02B 1/00 (2006.01); G03F 7/00 (2006.01); G03F 7/20 (2006.01); B29K 25/00 (2006.01); B29K 105/04 (2006.01); B29K 105/24 (2006.01); B42D 25/29 (2014.01); B42D 25/328 (2014.01); B42D 25/41 (2014.01)
CPC G03F 7/0005 (2013.01) [B29C 35/0805 (2013.01); B29C 44/3488 (2013.01); C08J 3/245 (2013.01); C08J 3/28 (2013.01); C08J 7/02 (2013.01); G02B 1/005 (2013.01); G03F 7/2053 (2013.01); B29C 2035/0838 (2013.01); B29K 2025/06 (2013.01); B29K 2105/04 (2013.01); B29K 2105/24 (2013.01); B42D 25/29 (2014.10); B42D 25/328 (2014.10); B42D 25/41 (2014.10); C08J 2325/06 (2013.01); G02B 2207/101 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for manufacturing a structured polymeric material by craze lithography, the method comprising:
providing a body comprising a precursor polymeric material;
setting up an interference pattern of electromagnetic radiation within the body comprising precursor polymeric material to form a partially cross-linked polymeric material, the interference pattern comprising maxima and minima of intensity of the electromagnetic radiation, the interference pattern thereby causing spatially differential cross linking of the precursor polymeric material to form crosslinked regions having relatively high cross linking density and non-crosslinked regions having relatively low cross linking density, the crosslinked regions and non-crosslinked regions corresponding to the maxima and minima of intensity of the electromagnetic radiation, respectively,
contacting the partially cross-linked polymeric material with a solvent to cause expansion and crazing of at least some of the non-crosslinked regions to form a structured polymeric material containing pores,
wherein the solvent used to cause expansion and crazing falls outside a Hansen solubility sphere for the precursor polymeric material when plotted in Hansen space but lies close enough to the Hansen solubility sphere for the precursor polymeric material to expand and craze the precursor polymeric material, and
wherein the precursor polymeric material is substantially homogeneous.