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“New materials to open the future”

Office: 33-313

Telephone: 880-7221 Email: espark@snu.ac.kr

Office hours: by appointment

2016 fall <Freshman Seminar>

10.31.2016

Eun Soo Park

Contents

I P S R A

pplication ntroduction

esearch tructure

roperties

Powerful properties

Thermal Optical

Mechanical Etc.

Structure & synthesis

Aspen

Aerogel Domestic - ETR

Research

Tree –

structure Type –

process Applicable prospect Commercial product

Application

Introduction

What is Aerogel ?

‘The lightest solid material in the world.’

- Guinnessworldrecords, 2002.

“An Invincible insulator.”

- Wall street journal

“A frozen smoke.”

- Steven S. Kistler (aerogel’s creater)

What is Aerogel ?

‘The lightest solid material in the world.’

- Guinnessworldrecords, 2002.

“An Invincible insulator.”

- Wall street journal

“A frozen smoke.”

- Steven S. Kistler (aerogel’s creater)

Go further!

b. Thermal insulation a. Superlight weight

d. Compressive

strength c. Porosity

properties

e. Transparence

현재 쓰이는 최고급 섬유 단열재보다

39배

^{뛰어난 단열 효과}

1000도

^{이상의 온도}

에도 거의 열전도가 일어나지 않음

99,8% air, Space dust 채취 등 이용

자신의 무게의

2000배

^{까지 견딤}

기존 유리에 비하여 월등히 뛰어난 투과율

데이터가 충분하지 않습니다.

1cm 두께의 투과율

94%

83% AE

Ro G EL G

LA

SS

Powder type

Low cost Molding

Box

pannel

등 단열재

Structure & synthesis

a. Basic strucrure

b-1. Powder type

b-2. Singleton type

Porosity

&

shock-absorb

Singleton type

주로 유리 대체재

Space dust collector 등 특수목적용

Dendri Dendritic mer

A polymer that repeatedly stretches a regular unit structure of a branch shape from the center

D EFINITION

Polymer

Dendrimer and existing polymer have different number of connection sites

Connection site = 2 Linear structure

D

ENDRIMER

P

^OLYMER

Connection site = over 3 Dendrite structure

D IFFERENCE

Connection site = over 3 Dendrite structure

Connection site = 2

Linear structure

P

^OLYMER

D IFFERENCE

Dendrimer and existing polymer have different number of connection sites

D

ENDRIMER

Connection site = 2 Linear structure

P

^OLYMER

D

ENDRIMER

Connection site = over 3

Dendrite structure

D IFFERENCE

Dendrimer and existing polymer have different number of connection sites

SYNTHESIS INTRODUCTION

INTRODUCTION SYNTHESIS

S YNTHESIS

PROPERTIES APPLICATIONS

D

^IVERGENT

Gradually grow by attaching Monomer around nucleus

C

^ONVERGENT

Method attaching the separately grown branches to the nucleus

Divergent a. : 1 일탈한;갈라지는 [관습 등에서) 2【물리·심리】수렴(성)의

Divergent a. : 1 일탈한;갈라지는 [관습 등에서) 2【물리·심리】수렴(성)의

D

^IVERGENT

Gradually grow by attaching Monomer around nucleus

C

^ONVERGENT

Method attaching the separately grown branches to the nucleus

MONOMER 종하머

Connection

PLAYING… Site

-COOH

-COO-

-HO

PLAYING…

Connection Site

MONOMER 종하머

D

^IVERGENT

PLAYING…

D

^IVERGENT

C

^ONVERGENT

Divergent a. : 1 일탈한;갈라지는 [관습 등에서) 2【물리·심리】수렴(성)의

Gradually grow by attaching Monomer around nucleus

Method attaching the separately grown branches to the nucleus

C

^ONVERGENT

Convergent a. 1 점차 집합하는, 한 점에

2【물리·심리】 수렴(성)의

D

^IVERGENT

Gradually grow by attaching Monomer around nucleus

Method attaching the separately grown branches to the nucleus

C

^ONVERGENT

PLAYING…

Multifunctional

CORE

C

^ONVERGENT

PLAYING…

C

^ONVERGENT

PLAYING…

C

^ONVERGENT

PLAYING…

SYNTHESISSYNTHESIS PROPERTIESPROPERTIES

P ROPERTIES

APPLICATIONS INTRODUCTION

C

ONTROL

Control of the outermost functional group Density of center > Density of outer

D

^ENSITY

Characteristics of Dendrimer

Dendrimer < Polymer

V

ISCOCITY

C

ONTROL

Density of center > Density of outer

D

^ENSITY

Dendrimer < Polymer

V

ISCOCITY

Characteristics of Dendrimer

Control of the outermost functional group

D ENSITY

outer density is greater than density of center.

Can store desired molecule

C

ONTROL

Density of center > Density of outer

D

^ENSITY

Dendrimer < Polymer

V

ISCOCITY

Characteristics of Dendrimer

Control of the outermost functional group

C

ONTROL

D

^ENSITY

Dendrimer < Polymer

V

ISCOCITY

Characteristics of Dendrimer

Density of center > Density of outer

Control of the outermost functional group

Viscosity is smaller than conventional polymer.

V ISCOSITY

VS

Easy handling of molecules

C

ONTROL

D

^ENSITY

Dendrimer < Polymer

V

ISCOCITY

Characteristics of Dendrimer

Density of center > Density of outer

Control of the outermost functional group

C

ONTROL

Control of the outermost functional group

D

^ENSITY

Dendrimer < Polymer

V

ISCOCITY

Characteristics of Dendrimer

Density of center > Density of outer

C ONTROLLABLE

By controlling the outermost functional

groups, desired properties can be obtained Outer shell

property

Apparent property

C ONTROLLABLE

By controlling the outermost functional

groups, desired properties can be obtained

Research

History History

- First created in 1931

by Steven S. Kistler - 당시 취약한 강도와 긴 제조시간,

높은 비용이 개발의 난제 -1980년대, 우주항공 분야의

재료로 주목받기 시작.

Research

- 미국 나노기술 벤처,

2003년 최초로 에어로젤 실용화 성공.

(아스펜 시스템 회장 이강필(62)박사) ->

- 실질적 에어로젤 생산 기술 독점

………(

2009년 초

^까지)

- 2009. 07. 국내 최초 상업화 성공 - 가격 및 제조시간 기존제품의70%

- 채광창, 고강도 콘크리트 등

Application

Product Product

-Blanket type production,

Used as special purpose insulation

-Produced by Singleton's panel, Use as a building material such as a greenhouse window

Application

Prospect Prospect

-LNG vessels, pipes, etc.

Utilizing as wide insulation - Semiconductor

Low dielectric constant and heat resistance

- Ski, Skin Scuba, Winter clothes Breakthrough Functional Clothes

Metallic Foam: Metal + Porosity

 

자료 출처 The tensile strength of porous copper made by

the GASAR process (1995)

Heat and Mass flow through open structure

Metallic Foam: Metal + Porosity

Metallic foam이란 기본적으로 최소 수% ~ 최대95%의porosity를 가지는 구조로서 이 특별한 형태의 빈 공간 덕분에 다양하고 우수한 특성을 보인다.

Metallic Foam Micro/Nanolattice

Thank You for Kind Attention