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US 2013/0171439 A1Published application
Cellulose-based composite materials
AssigneeYissum Research Development Company of the Hebrew University of Jerusalem
InventorsOded Shoseyov, Arnon Heyman, Shaul Lapidot, Sigal Meirovitch, Yuval Nevo, Tord Gustafsson
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Abstract
Provided are cellulose nano-material based composite and foam articles.
Claims32
A composite article, comprising:
- a scaffold having a plurality of pores, the scaffold comprising at least one cellulose nano-material selected from the group consisting of nanocrystalline cellulose (NCC), microfibrillar cellulose (MFC) and bacterial cellulose (BC);
- and
- at least one polymer resin at least partially occupying a plurality of pores in the scaffold.
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A cellulose nano-material foam obtainable by a process comprising:
- (a) obtaining a suspension of cellulose nano-material in an aqueous medium;
- (b) freezing said suspension to afford a frozen aqueous cellulose nano-material suspension;
- (c) treating the frozen suspension under solvent-exchange to afford a solvent saturated, substantially water-free foam;
- and
- (d) removing the solvent to afford a substantially solvent and water-free cellulose nano-material foam.
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A composite article, comprising:
- a scaffold having a plurality of open cellular structures comprising pores that are connected to one another and form an interconnected network, the scaffold comprising
- NCC;
- and
- at least one polymer resin, the
- the pores being at least partially filled with the at least one polymer resin, and optionally, the polymer resin being cured.
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Dependencies are inferred from the claim text.