GRAPHENE-MODIFIED POLYMERIC FOAM AND ARTICLES MADE THEREOF

    公开(公告)号:US20230138169A1

    公开(公告)日:2023-05-04

    申请号:US17799338

    申请日:2021-02-16

    申请人: NanoXplore Inc.

    IPC分类号: C08K3/04 C08J9/00

    摘要: Graphene-modified polymeric foam materials are provided that are amenable to conventional foams to yield articles with superior properties relative to like articles absent the graphene cell modifier. Graphene-based cell modifiers are incorporated in the polymer before or during the foaming process to not only improve the mechanical, thermal, electrical, fire retardant, or barrier properties of the polymer matrix itself, but also help modify the size, density, and morphology of cells in the foam, thereby tailoring the properties of the final foam articles. The graphene-modified polymeric foam materials may be utilized for the manufacturing of articles for mechanical, thermal, noise reduction, or sound absorption applications. The graphene-modified foams and articles made thereof have the advantages higher mechanical strength, better thermal stability, and better sound absorption properties as compared to the conventional polymeric foams such as materials made by copolymer polyol.

    LARGE SCALE PRODUCTION OF OXIDIZED GRAPHENE

    公开(公告)号:US20220194799A9

    公开(公告)日:2022-06-23

    申请号:US16692201

    申请日:2019-11-22

    申请人: NanoXplore Inc.

    摘要: Embodiments described herein relate generally to the large scale production of functionalized graphene. In some embodiments, a method for producing functionalized graphene includes combining a crystalline graphite with a first electrolyte solution that includes at least one of a metal hydroxide salt, an oxidizer, and a surfactant. The crystalline graphite is then milled in the presence of the first electrolyte solution for a first time period to produce a thinned intermediate material. The thinned intermediate material is combined with a second electrolyte solution that includes a strong oxidizer and at least one of a metal hydroxide salt, a weak oxidizer, and a surfactant. The thinned intermediate material is then milled in the presence of the second electrolyte solution for a second time period to produce functionalized graphene.