Composite building products bound with cellulose nanofibers
US10695947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2014 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Aug 19, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N3/002
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Building materials are generated by the simple mixing of cellulose nanofiber (CNF) slurry with typical wood-derived material such as wood meal, optionally with mineral particulate materials, and dried. Particle boards are made with wood meal particulates; wallboards are made with wood particulates and mineral particulates; paints are made with pigment particulates; and cement is made with aggregate particulates. The particle board samples were tested for fracture toughness. The fracture toughness was found to be from 20% higher up to ten times higher than the typical value for similar board, depending on the formulation. For cases of 20% by weight cellulose nanofibers and 80% wood, the fracture toughness was more than double that of typical particle board. The process sequesters carbon and oxygen into the building product for its lifespan—typically decades—and avoid releasing CO2 into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.