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Rheology and Materials Processing Centre Rheology and Materials Processing Centre Rheology and Materials Processing Centre An Overview Nano-materials and Nanotechnology Research Professor Paul Slatter, Director Rheology and Materials Processing Centre RMIT University AT

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Page 1: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Rheology and Materials Processing CentreRheology and Materials Processing Centre

An Overview

Nano-materials and Nanotechnology Research

Professor Paul Slatter, Director

Rheology and Materials Processing CentreRMIT University

AT

Page 2: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Project Areas

1. Nanostructured Functional Materials

2. Heat Reflective Cool Pigments

3. Nanopigments for Inks

4. Nano-Emulsions

Page 3: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

1. Nanostructured Functional MaterialsProjects

– Clay based Nano-structured Pigments

– Synthetic Polymeric Nanopigments

– Nanopigments with Special Optical Properties

– Nano Particles with Anti-Microbial Activities

Research Group– Prof Sati Bhattacharya

– Dr Sumanta Raha

– Dr Nurul Quazi

– Dr Ivan Ivanov

Page 4: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Clay based Nano-structured Pigments

1 Rhodamine / PP2 Nanopigment / PP

UV-Exposed

unexposed

• Hybrid Clay-Dye Intercalated Structure• Enhanced UV Stability• Improved Thermal Stability• Suitable for Outdoor applications

Rhodamine based hybrid Nanopigment RNP Enhanced UV-stability

Page 5: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Synthetic Polymeric Nanopigments

• Provisional Patent lodged (Nov 2008)• Licensing Agreement signed for

Commercialisation

Fluorescent Nanopigment : PNP 98

• Dye fixed in a cross-linked polymeric matrix• 100% organic nanopigment• Non-leaching (protection for the environment)• Nano-scale particle size with controllable size

distribution• Enhanced colour-fastness and UV-stability

Page 6: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Current Interests - Nanostructured Functional Materials

• Nanopigments with Special Optical Properties– Development of Unique Optical Signatures in Nanopigments– Target Applications : Document Security

• Nano Particles with Anti-Microbial Properties– Anti-Fouling Coatings in Ship Hull and Other Marine Structures– Non-Leaching and Environmentally Safer compared with current

anti-fouling agents– Potential Collaborators:

• Prof John Buckeridge and Group (Environmental Engineering)• Prof David Mainwaring and Group (Applied Chemistry)

Page 7: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Environmental Impacts

• Replace toxic heavy metal based pigments • Leaching of the dye either eliminated or greatly reduced – safer

for users and for the environment• Enhanced colour-fastness and photo-stability

– Longer application life

Nanopigments

• Leaching of the Reactive Molecules can be eliminated or greatly reduced – safer for users and for the environment

• Longer application life

Functionally Active Nano Particles (e.g. Anti-microbial activity)

Page 8: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Current Collaborations - Nanostructured Functional Materials

• Nanopigment doped polymers for novel optical devices– With Dr Gorgi Kostovski (SECE/MMTC) and Co-Investigators.– Will investigate if nanopigments can be used in optical micro-

channels by replacing traditional dyes and the possible improvements in their photo-chemical stability.

• Silicon-on-Insulator photonic device as a bio-sensing platform– With Dr Thach Nguyen (SECE/MMTC) and Co-Investigators.– Will investigate the response of waveguide sensors to chromatic

and bio-molecules adsorbed on the waveguide surface.

Page 9: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

2. Heat Reflective Cool Pigments for Cars

Objectives:• To reduce heat build up in automobiles and buildings• To prolong the life of coated parts• To reduce air-conditioning (reduced CO2 emission)

Heat-reflective pigments allow for the design of products that remain cool under the sun-without sacrificing colour

0

2

4

6

8

10

700 800 900 1000Wavelength (nm)

% R

efle

ctan

ce

Lumogen P1P2 P3

Balwinder KaurPhD Researcher

Page 10: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

3. Nanopigments for Inks

Key Features:• Intercalated Clay/Dye Nanopigments• Improved Colour-fastness• Reduced Leaching during application• Better UV-resistance

Edwin BaezPhD Researcher

Dye applied on Paper

Nanopigment applied on Paper

Nanopigments can offer better image durability than dyes. Their heavy- metal-free nature is an environmentally friendly alternative over conventional pigments.

Page 11: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

4. Nano-Emulsions

Objectives:• To produce Oil-in Water Nano-

Emulsions using phase inversion tempearature (PIT) method

• To investigate their stability and the effect of electrolytes

Research Team• Firoozeh Pourjavaheri-Jad• Dr. Raj Parthasarathy

Oil-in Water Nano-Emulsions produced by Phase Inversion Temperature Method.

0.0

0.2

0.4

0.6

0.8

1.0

1.2

10 100 1000Radius (nm) (Log Scale)

Volu

me

(%)

0 M NaCl0.025 M NaCl0.050 M NaCl0.075 M NaCl0.1 M NaCl

Storage and AppearanceCryo-SEM of a freshly frozen Nano-Emulsion

Particle size distribution (DLS)of fresh Nano-Emulsions

Day 0 Day 3

Page 12: Nano-materials and Nanotechnology Researchmams.rmit.edu.au/nq3tkz7v099l.pdf · Nano-materials and Nanotechnology Research. Professor Paul Slatter, Director. Rheology and Materials

Rheology and Materials Processing Centre

Quo vadis?• Rust-rods for cancer treatment• Inverse Phase (W/O) supersaturated

trans/dermal patches• Manipulation of tailings rheology