- Available Technology
Automative, Packaging, Insulation, Lignin, Sustainable and Biodegradable Plastic, Lightweight Materials
The experimental protocol makes use of technical Kraft lignin without depolymerization or fractionation with organic carbonates to functionalize the lignin macromolecular structure with 5-membered cyclocarbonate groups. The technique makes use of glycerol carbonate at 150°C for 1.5 hours with Kraft lignin and a subsequent step using dimethyl carbonate at 75°C for 4 hours to produce cyclocarbonate groups on the backbone of lignin. The curing reaction makes use of a 100% biobased diamine derived from vegetable oil. The addition of curing agent to the cyclocarbonated precursors causes fast gel times enabling the curing and foaming reaction to occur on similar timescales. For the foaming reaction, a unique process developed in our lab called “delayed addition” (DA) makes use of polymethlyhydrosiloxane (PMHS) as foaming agent. The DA approach allows for a time interval before addition of the foaming agent allowing the crosslinking reaction to progress in the NIPU formulation.
• Creates reactive molecues from lignin using non-toxic and biobased reagents
• Addresses the problems of environmental threats without contributing to the global crisis of plastic waste
• Presents an entirely new concept of packaging materials using 100% biobased compounds
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