公开(公告)号：US20230358357A1

公开(公告)日：2023-11-09

申请号：US18028539

申请日：2021-09-21

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  KROSAKIHARIMA CORPORATION

Inventor： Rudder WU ,  Kuan-I LEE ,  Kazuhiro MATSUZAKI ,  Hironobu SASAYAMA ,  Yukihisa MATSUO ,  Shogo YAMASHITA

IPC: F16L59/02

CPC classification number: F16L59/028

Abstract: An objective of the present invention is to provide a pipe through which fluids can flow, in which thermal insulation in a space between an inner wall and an outer wall is achieved at low cost and high performance. The thermal insulation pipe of the present invention is a thermal insulation pipe formed by a double wall pipe of an inner pipe and an outer pipe. A thermal-insulating material to be filled in a space between the inner pipe and the outer pipe is made from an aerogel having a three-dimensional network structure with a framework constituted by a cluster of aggregation of primary particles. The thermal-insulating material includes fine particles having a three-dimensional network structure with a framework of the primary particles. A preferred form of such a thermal-insulating material is weakly bonded aerogel ultrafine particle generated by crushing at ultra-high speed a low-binding ultrafine aerogel generated from an aerogel with aging conditions during manufacturing process set to a low temperature and short time period.

公开(公告)号：US20230357525A1

公开(公告)日：2023-11-09

申请号：US18028543

申请日：2021-06-04

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Rudder WU ,  Kuan-I LEE

IPC: C08J9/228 ,  C08J9/36

CPC classification number: C08J9/228 ,  C08J9/36 ,  C08J2383/06 ,  C08J2201/054 ,  C08J2205/026

Abstract: A manufacturing method of an aerogel powder of the present invention includes: a mixing process of mixing a silicon alkoxide (TEOS (tetraethoxysilane)) and a solvent (methanol) to form a sol on hydrolysis; a gelling process of gelling the sol obtained in the mixing process; an aging process of aging the gel obtained in the gelling process to obtain a wet gel (alkogel); a solvent exchanging process of replacing the solvent of the wet gel with a predetermined replacement solvent (hexane); a modifying process of modifying a surface of a network structure of the wet gel with a predetermined organic group using TMCS; a process of washing the modified wet gel obtained in the wet gel generating process; drying the washed and modified wet gel; and crushing the dried, washed and modified wet gel. It is possible to provide aerogel powder with reduced manufacturing cost per unit bulk volume and excellent in thermal insulation.

公开(公告)号：US20230150825A1

公开(公告)日：2023-05-18

申请号：US18014737

申请日：2021-06-04

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Rudder WU ,  Kuan-I LEE ,  V. Rivera Raymond VIRTUDAZO

IPC: C01B33/158

CPC classification number: C01B33/1585 ,  C01P2006/16

Abstract: The hybrid aerogel of the present invention includes an aerogel having a network structure created by bonded secondary particles of a metal oxide with pores formed among the secondary particles; and nano-size hollow particles of 30 nm or more and 360 nm or less in outer diameter and mixed into the aerogel. Gas flow paths formed by the communication of the pores in the aerogel are blocked by the shells of the nano-size hollow particles. Provided is a solid thermal insulation material with highly thermal insulation performance comparable to vacuum insulation and not collapsing even when atmospheric pressure acts thereon.