Emerging Applications of Radiation Processing using EB Masao TAMADA

Takasaki Advanced Radiation Research Institute, Sector of Nuclear Science Research, Japan Atomic Energy Agency

15/09/15

Adding electrical property

Commercialized by satisfying Needs

Separator Membrane for Button

Battery

Thermally Stable

Polymer Foam Sheet

Heat Resistant

Cable

Radial Tire

Mass processing without toxic chemicals

Improving thermal and mechanical

properties

Radiation Processing in Daily life 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 1

Sterilization of

Medical products

Keys for Technology Transfer 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 2

1. Needs of End users Matching with seed technology in Radiation processing

2. Utilization of Advantages of Radiation Processing

Following reactions were not realized by Chemical process

Modification of commercial product >>> Versatile applications Homogeneous reaction in whole material >>> Uniform processing No contamination of catalyst >>> Clean product

3. Economically feasible materials High cost performance materials • High performance products • Effective production process

Effective processing with EB 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 3

Electrically On-OFF Easy operation

High processing rate

Mass production

Gamma ray

Electron beam

Penetrating Power

Generation Electrically accelerated

electron

Radioactive decay of

Co-60

Maximum dose rate

20 kGy/h Some

hundreds kGy/s

High Low

3.6ｘ104 times Idea of

Material shape

Swift Purification Filtration in 30 min

~2L ~１ｍL

Na

+ solution

2,000 times faster

High performance adsorbent 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 4

Nonwoven fabric

18 µm in diameter

Graft polymeri-

zation

Metal-adsorbent

fabric

250 keV EB

Removal of Cesium in Tap water

Purification of washing agent for

Silicon wafer

equivalent to 90 µm thick water

Graft product Product

in the market

10 ppb 0.01 ppb

Low energy EB grafting 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 5

Compact size, Self shielded and Rational cost

EB machine 250ｋV

Nonwoven fabric roll

2.0 m

2.0 m

EB machine

Electron beam

irradiation

Graft polymerization

Reactor

heat-resisting cable Radial tire

Super-heat resistance SiC fiber

Polyethylene foam sheet

Wound dressing

Crosslinking Graft polymerization

Button battery

Bio- degradable dummy lens

High performance

wiper blade

Extraction of Rare Metal from hot spring water

Promising applications

Versatile Applications using EB 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 6

Filter for ultra pure chemicals

Washi lampshade

Removal of Cesium in

water

Demonstration of Crosslinking effect 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) S2

We can see ”Shape memory effect induced by Radiation-Crosslinking “

Crosslinked by EB irradiation

Non-crosslinked

School Teaching Material 15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) s1

Commercialized in April, 2015

Dip into hot water around 60 ºC

Stretched Melted

Shape memory plastic film can be used for studying "radiation-induced crosslinking effect“

Crosslinked by EB irradiation Non-crosslinked Film is easily

treated by EB irradiation

Thank you for your attention !

15/09/15 M. Tamada, Emerging Applications of Radiation Processing using EB (Electron Beam) 9