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.

公开(公告)号：US20230011081A1

公开(公告)日：2023-01-12

申请号：US17860673

申请日：2022-07-08

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Myoung-Woon MOON ,  Hyesung CHO ,  Cho-hee LEE ,  Taegeun KIM ,  Haeshin LEE ,  Younseon WANG ,  Yunhan LEE

IPC: B29C64/112 ,  C08L1/02 ,  C08L5/08 ,  C08L79/02 ,  C08L79/08

Abstract: Provided are a cellulose composite material, a three-dimensional (3D) printing material and a 3D printing structure including the cellulose composite material, and a method of manufacturing a 3D printing structure using the cellulose composite material. The cellulose material may be used as a 3D printable eco-friendly material using cellulose that is an eco-friendly natural material and a compound having a catechol group that is derived from nature, and a structure implemented with 3D printing has excellent tensile strength or compressive strength.