公开(公告)号：US20210261415A1

公开(公告)日：2021-08-26

申请号：US17179332

申请日：2021-02-18

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  DREXEL UNIVERSITY

Inventor： Yury GOGOTSI ,  Kanit HANTANASIRISAKUL ,  Chong Min KOO ,  Aamir IQBAL ,  Soon Man HONG ,  Seon Joon KIM ,  Seung Sang HWANG ,  Kyung Youl BAEK ,  Albert LEE ,  Sangho CHO

IPC: C01B21/082 ,  H05K9/00

Abstract: In an aspect, the present disclosure provides a heat-treated transition metal carbonitride MXene film annealed at high temperatures and a polymer composite comprising the same. In another aspect, the present disclosure provides a method for producing a heat-treated transition metal carbonitride MXene film comprising: obtaining a MXene aqueous solution containing dispersed 2-dimensional (2D) MXenes through an acid etching process; filtering the obtained MXene aqueous solution through a vacuum filtration process to produce a free-standing film; and annealing the produced free-standing film at high temperatures to obtain a heat-treated transition metal carbonitride MXene film. In still another aspect, the present disclosure provides an electromagnetic interference (EMI) shielding method comprising: superposing a coating comprising a heat-treated transition metal carbonitride MXene film on at least one surface of an object in a contact or non-contact manner.

公开(公告)号：US20190016868A1

公开(公告)日：2019-01-17

申请号：US15990690

申请日：2018-05-28

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Chong Min KOO ,  Soon Man HONG ,  Seung Sang HWANG ,  Kyung Youl BAEK ,  Hyunchul PARK ,  Seunggun YU ,  Hyesung CHO

IPC: C08J9/228 ,  C08J9/18 ,  C08J9/14 ,  C08J9/236 ,  B29C44/34 ,  B29C44/44 ,  C23C18/40

Abstract: A method of preparing a polymer hollow particle, a low-specific gravity and monodispersed polymer hollow particle of various shapes prepared using the method, and a composite including the polymer hollow particle are provided. The method includes: a first step of providing, onto a substrate including a engraved pattern, at least one expandable particle comprising a foaming agent-containing expandable core and a thermoplastic polymer shell; a second step of removing an excess of the at least one expandable particle from a resulting product of the first step; a third step of expanding the at least one expandable particle in the engraved pattern of the substrate by thermally treating a resulting product of the second step; and a fourth step of separating, from the substrate, expanded hollow polymer particles which are a resulting product of the third step.