公开(公告)号：WO2020109671A1

公开(公告)日：2020-06-04

申请号：PCT/FI2019/050858

申请日：2019-11-29

Applicant: AALTO UNIVERSITY FOUNDATION SR

Inventor： ÖSTERBERG, Monika ,  SIPPONEN, Mika ,  KOSTIAINEN, Mauri ,  ÄKRÄS, Laura ,  RIVIÈRE, Guillaume ,  ZHANG, Xue

IPC: C08L97/00 ,  C08J3/075

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：WO2023084157A1

公开(公告)日：2023-05-19

申请号：PCT/FI2022/050740

申请日：2022-11-09

Applicant: AALTO UNIVERSITY FOUNDATION SR

Inventor： BANGALORE ASHOK, Rahul Prasad ,  FORSMAN, Nina ,  FORSSELL, Susanna ,  HENN, Alexander ,  KHALATI, Elham ,  OINAS, Pekka ,  ÖSTERBERG, Monika

IPC: C08H7/00 ,  C09J197/00 ,  C09D197/00 ,  C08L97/00

Abstract: The invention is the synthesis and use of epoxidized lignin (EL) preferably with but also without colloidal lignin nanoparticles (CLP, plural CLPs). The invention is divided in two parts, synthesis and utilization. The synthesis of the invention is performed in the following general steps: Preparation of an aqueous solution of lignin and a base. Combining the lignin solution with epichlorohydrin at 1 - 90 °C, where the amount of epichlorohydrin should be within 1 - 20 ml per gram of lignin. Allowing the epoxidation reaction to take place between 1 minutes to 5 hours, while stirring the mixture. Removal of excess epichlorohydrin from epoxidized lignin solution by e.g. solvent extraction. Separation of EL from the aqueous solution. EL functions as a cross-linker and may be used e.g. to prepare adhesives, surface coatings, and composite materials. EL may also be used as foaming agent in water-based solutions.

公开(公告)号：WO2022136740A1

公开(公告)日：2022-06-30

申请号：PCT/FI2021/050905

申请日：2021-12-21

Applicant: AALTO UNIVERSITY FOUNDATION SR

Inventor： ZOU, Tao ,  ÖSTERBERG, Monika ,  SIPPONEN, Mika ,  HENN, Alexander

IPC: C08L97/00 ,  C08H7/00 ,  C09J197/00 ,  B27N3/00 ,  C07G1/00 ,  C08L63/00

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.

公开(公告)号：WO2021240071A1

公开(公告)日：2021-12-02

申请号：PCT/FI2021/050389

申请日：2021-05-28

Applicant: AALTO UNIVERSITY FOUNDATION SR

Inventor： FORSMAN, Nina ,  ÖSTERBERG, Monika ,  HENN, Alexander

IPC: C09D5/02 ,  C09D163/00 ,  C09D197/00 ,  C09J163/00 ,  C09J197/00

Abstract: According to an example aspect of the present invention, there is provided a composition comprising colloidal lignin particles and an epoxy compound.