0
Particle Characterization of Pigments
Mark Bumiller
Mark.bumiller@horiba.com

© 2012 HORIBA, Ltd. All rights reserved.
Outline
Why is particle size important?
Organic pigments using laser diffraction
Inorganic pigments using laser diffrac...
Pigments
A pigment is a material that changes the color of reflected or
transmitted light as the result of wavelength-sele...
Properties Dependent on Particle Size
 Hue/Tint Strength
 Hiding/Transparency
 Gloss/Flatting and Film Appearance
 Flo...
Organic Pigments
Commonly powder form
Dry milling procedures monitored by dry
laser diffraction method
Particle size ef...
Organic Pigments Study

Samples*:
•2583 Diarylide Yellow 83
•1274 Hansa Yellow 74
•2574 Hansa Yellow 74
•5576 Phthalo Blue...
Dry Organic Pigment Results
2583 Diarylide Yellow 83
Sample ID
Results
Run 1
18.386
Run 2
18.082
Run 3
18.032
Mean
18.17
C...
Dry Organic Pigment Results
2574 Hansa Yellow 74
Sample ID
Results
Run 1
36.490
Run 2
36.618
Run 3
36.603
Mean
36.570
COV%...
Inorganic: Iron Oxide, LA-950 Wet

© 2012 HORIBA, Ltd. All rights reserved.
Inorganic: Chromium Oxide Green

 Micro 90 surfactant to wet powder
 0.1% sodium pyrophosphate

© 2012 HORIBA, Ltd. All ...
Inorganic: Alumina Al2O3

© 2012 HORIBA, Ltd. All rights reserved.
Ink Pigment

© 2012 HORIBA, Ltd. All rights reserved.
TiO2 Commercial Data Sheet

© 2012 HORIBA, Ltd. All rights reserved.
TiO2 : Effect of Size
Opacity of TiO2
mean 0.25 and 10 µm

0.0

0.25

Relative scattering power
0.50 0.75 1.00 1.25 1.50

...
TiO2 Measurement Procedure
Step 1: Buy a HORIBA LA-950
Decide wet or dry analysis
Wet: disperse sample using surfactant...
TiO2: Effect of Refractive Index
Measure sample once
Fix real RI, vary imaginary
Minimize R parameter (error calculation)
...
TiO2 for Cosmetics

% under 100 nm
“nanoparticles”

© 2012 HORIBA, Ltd. All rights reserved.
TiO2: Wet vs. Dry
Only 8 nm difference!
Dry dispersion below 350 nm median

Wet

Dry

© 2012 HORIBA, Ltd. All rights reser...
TiO2: Dry Analysis of 2 Samples
Able to reproducibly distinguish
2 samlpes with 12 nm difference
@ D(v,0.5)

© 2012 HORIBA...
Nano TiO2*

Data from HORIBA LB-500

*

© 2012 HORIBA, Ltd. All rights reserved.
TiO2 Size & Zeta Potential on SZ-100

Size, note: Intensity distribution

Zeta potential @ pH = 7
© 2012 HORIBA, Ltd. All ...
Conclusions
Particle size important physical
parameter requiring analysis for control
Laser diffraction excellent tool d...
To Learn More: www.horiba.com/particle

Talk to us, ask questions

Receive news of updates
View application/technical
note...
ありがとうございました
ขอบคุณครับ
Gracias

ُْ
‫اشكر‬

Grazie

Σας ευχαριστούμε

Tacka dig
감사합니다

© 2012 HORIBA, Ltd. All rights reser...
Upcoming SlideShare
Loading in...5
×

Particle Size Analysis of Pigments and Inks

2,730

Published on

Mark Bumiller of HORIBA Scientific discusses tactics for getting the best possible particle size results for pigments, inks, and paints. These applications tend to be more challenging than most, so the information in this presentation will be valuable for any chemist responsible for these materials.

Published in: Technology, Business
0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,730
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
80
Comments
0
Likes
2
Embeds 0
No embeds

No notes for slide

Transcript of "Particle Size Analysis of Pigments and Inks"

  1. 1. Particle Characterization of Pigments Mark Bumiller Mark.bumiller@horiba.com © 2012 HORIBA, Ltd. All rights reserved.
  2. 2. Outline Why is particle size important? Organic pigments using laser diffraction Inorganic pigments using laser diffraction Ink pigments TiO2 study using laser diffraction TiO2 particle size and zeta potential using dynamic light scattering Conclusions © 2012 HORIBA, Ltd. All rights reserved.
  3. 3. Pigments A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption red and green absorb blue reflects © 2012 HORIBA, Ltd. All rights reserved.
  4. 4. Properties Dependent on Particle Size  Hue/Tint Strength  Hiding/Transparency  Gloss/Flatting and Film Appearance  Flocculation Gloss vs. % > 1 µm  Viscosity  Stability  Weather resistance © 2012 HORIBA, Ltd. All rights reserved.
  5. 5. Organic Pigments Commonly powder form Dry milling procedures monitored by dry laser diffraction method Particle size effects dispersibility of pigment in application media Wet laser diffraction method to monitor dispersion of organic pigments in low viscosity liquid media © 2012 HORIBA, Ltd. All rights reserved.
  6. 6. Organic Pigments Study Samples*: •2583 Diarylide Yellow 83 •1274 Hansa Yellow 74 •2574 Hansa Yellow 74 •5576 Phthalo Blue 15:3 1. Select the small, high-dispersion nozzle for the fine particle sizes expected. 2. Set the automatic measurement conditions to proper testing range (96-94%T for the laser). 3. Set dispersion air pressure to Low. 4. To prevent nozzle clogging, remove large agglomerates from sample using 1mm sieve 5. Load enough filtered sample onto feeder chute to perform multiple measurements. 6. Take 3 consecutive measurements using the Auto Measurement function. *Thank-you to Lansco Colors, Warwick, RI for supplying the samples for this study. www.pigments.com © 2012 HORIBA, Ltd. All rights reserved.
  7. 7. Dry Organic Pigment Results 2583 Diarylide Yellow 83 Sample ID Results Run 1 18.386 Run 2 18.082 Run 3 18.032 Mean 18.17 COV % 1.05 1274 Hansa Yellow 74 Sample ID Results Run 1 50.125 Run 2 50.096 Run 3 50.442 Mean 50.220 COV % 0.38 © 2012 HORIBA, Ltd. All rights reserved. 2583 Diarylide Yellow 83 1274 Hansa Yellow 74
  8. 8. Dry Organic Pigment Results 2574 Hansa Yellow 74 Sample ID Results Run 1 36.490 Run 2 36.618 Run 3 36.603 Mean 36.570 COV% 0.19 5576 Phthalo Blue 15:3 Sample ID Results Run 1 25.114 Run 2 25.546 Run 3 25.531 Mean 25.397 COV % 0.97 © 2012 HORIBA, Ltd. All rights reserved. 2574 Hansa Yellow 74 5576 Phthalo Blue 15:3
  9. 9. Inorganic: Iron Oxide, LA-950 Wet © 2012 HORIBA, Ltd. All rights reserved.
  10. 10. Inorganic: Chromium Oxide Green  Micro 90 surfactant to wet powder  0.1% sodium pyrophosphate © 2012 HORIBA, Ltd. All rights reserved.
  11. 11. Inorganic: Alumina Al2O3 © 2012 HORIBA, Ltd. All rights reserved.
  12. 12. Ink Pigment © 2012 HORIBA, Ltd. All rights reserved.
  13. 13. TiO2 Commercial Data Sheet © 2012 HORIBA, Ltd. All rights reserved.
  14. 14. TiO2 : Effect of Size Opacity of TiO2 mean 0.25 and 10 µm 0.0 0.25 Relative scattering power 0.50 0.75 1.00 1.25 1.50 1.75 Relative scattering power rutile TiO2 vs. size 0.05 0.1 0.15 0.20 0.3 Size (diameter) in µm © 2012 HORIBA, Ltd. All rights reserved. 0.5 0.8
  15. 15. TiO2 Measurement Procedure Step 1: Buy a HORIBA LA-950 Decide wet or dry analysis Wet: disperse sample using surfactant and ultrasound Method development using Method Expert RI, concentration, ultrasound Dry: Use smallest nozzle and highest air pressure © 2012 HORIBA, Ltd. All rights reserved.
  16. 16. TiO2: Effect of Refractive Index Measure sample once Fix real RI, vary imaginary Minimize R parameter (error calculation) Use 1.0 for imaginary RI © 2012 HORIBA, Ltd. All rights reserved.
  17. 17. TiO2 for Cosmetics % under 100 nm “nanoparticles” © 2012 HORIBA, Ltd. All rights reserved.
  18. 18. TiO2: Wet vs. Dry Only 8 nm difference! Dry dispersion below 350 nm median Wet Dry © 2012 HORIBA, Ltd. All rights reserved.
  19. 19. TiO2: Dry Analysis of 2 Samples Able to reproducibly distinguish 2 samlpes with 12 nm difference @ D(v,0.5) © 2012 HORIBA, Ltd. All rights reserved.
  20. 20. Nano TiO2* Data from HORIBA LB-500 * © 2012 HORIBA, Ltd. All rights reserved.
  21. 21. TiO2 Size & Zeta Potential on SZ-100 Size, note: Intensity distribution Zeta potential @ pH = 7 © 2012 HORIBA, Ltd. All rights reserved.
  22. 22. Conclusions Particle size important physical parameter requiring analysis for control Laser diffraction excellent tool down to 30 nm Dynamic light scattering for sub micron particle size + zeta potential HORIBA has products and support for your application requirements © 2012 HORIBA, Ltd. All rights reserved.
  23. 23. To Learn More: www.horiba.com/particle Talk to us, ask questions Receive news of updates View application/technical notes (>130), webinars (>40), white papers. © 2012 HORIBA, Ltd. All rights reserved.
  24. 24. ありがとうございました ขอบคุณครับ Gracias ُْ ‫اشكر‬ Grazie Σας ευχαριστούμε Tacka dig 감사합니다 © 2012 HORIBA, Ltd. All rights reserved. 谢谢 धन्यवाद நன்ற Danke Большое спасибо Obrigado
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×