Grafting method for rice straw fiber modification
US10501588B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2018 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Jun 16, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2397/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to the field of reutilization of biomass resources, and more particularly relates to a grafting method for rice straw fiber modification. The pulverized and pretreated straw powder is first reacted with diisocyanate under ultrasonic and microwave treatment, and the resulting product is reacted with PEG to obtain the PEG grafted straw fiber polymer compound. Grafting PEG onto the straw fiber through the bridging of the diisocyanate improves the thermoplasticity of the modified rice straw fiber. The modified straw fiber of the present invention can be hot-pressed to form self-reinforced composite materials without adding additional materials, which overcomes the waste and pollution problem of traditional straw reutilization method, achieving the goal of whole straw utilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.