发明名称 |
IRIDESCENT SOLID NANOCRYSTALLINE CELLULOSE FILMS INCORPORATING PATTERNS AND METHOD FOR THEIR PRODUCTION |
摘要 |
<p>A new method to produce solid nanocrystalline cellulose (NCC) films containing patterns by differential heating of aqueous suspensions of NCC has been discovered. When acid-form NCC suspensions are dried by heating to temperatures above 50° C., darkening of the NCC can occur, while neutral forms of NCC can produce iridescent chiral nematic films by heating to temperatures up to 105° C. Placing materials of different thermal conductivity beneath the container containing an evaporating NCC suspension results in watermark-like patterns of different iridescent color imprinted within the film structure. Other colloidal rod-like particles can be employed in place of nanocrystalline cellulose (NCC), for example chitin or chitosan.</p> |
申请公布号 |
EP2389462(A1) |
申请公布日期 |
2011.11.30 |
申请号 |
EP20090831338 |
申请日期 |
2009.12.08 |
申请人 |
FPINNOVATIONS |
发明人 |
BECK, STEPHANIE;BOUCHARD, JEAN;BERRY, RICHARD;CHAUVE, GRÉGORY CHRISTIAN |
分类号 |
G06K19/10 |
主分类号 |
G06K19/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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