公开(公告)号：US20220010077A1

公开(公告)日：2022-01-13

申请号：US17298622

申请日：2019-11-29

Applicant: Aalto University Foundation sr

Inventor： Monika Österberg ,  Mika Sipponen ,  Mauri Kostiainen ,  Laura Äkräs ,  Guillaume Rivière ,  Xue Zhang

IPC: C08J3/07 ,  C08L97/00 ,  B01F17/00

Abstract: Method of preparing a dispersion of colloidal lignin particles by providing a solution of lignin in a mixture of an organic solvent for lignin and a non-solvent for lignin having a ratio of non-solvent to solvent; and increasing the ratio of the non-solvent to the solvent to produce an aqueous dispersion of colloidal lignin particles. The dispersions are stable and the colloidal lignin particles are useful for many applications such as rheology modifiers in three-dimensional printing of hydrogels, or in purification systems such as filters, and packed columns, and as flocculants.

公开(公告)号：US20240067823A1

公开(公告)日：2024-02-29

申请号：US18268319

申请日：2021-12-21

Applicant: Aalto University Foundation sr

Inventor： Tao Zou ,  Monika Österberg ,  Mika Sipponen ,  Alexander Henn

IPC: C08L97/00 ,  C08G59/24 ,  C08J3/14 ,  C08K5/19 ,  C09J7/25 ,  C09J163/00 ,  C09J197/00

CPC classification number: C08L97/005 ,  C08G59/245 ,  C08J3/14 ,  C08K5/19 ,  C09J7/25 ,  C09J163/00 ,  C09J197/005 ,  C09J2301/30 ,  C09J2463/00 ,  C09J2497/00

Abstract: The invention describes a method of forming aqueous lignin-epoxy hybrid nanoparticles with switchable surface characteristics. The invention is applicable to production of technical adhesives and covalent surface modification of lignin nanoparticles under harsh reaction conditions. Further, in terms of the covalent functionalization of lignin nanoparticles (LNPs), this invention presents the covalent cationization of LNPs by means of attached quaternary ammonium groups.