Light-scattering efficiency of starch acetate pigments as a function of size and packing density

Antti Penttilä, Kari Lumme, Lauri Kuutti

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50% (large cylindrical slabs) or at 37% or 57% (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4  μm.
Original languageEnglish
Pages (from-to)3501-3509
Number of pages9
JournalApplied Optics
Volume45
Issue number15
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Fingerprint

starches
packing density
pigments
Starch
Pigments
Light scattering
acetates
light scattering
coatings
particulates
Coatings
Coating techniques
simulated annealing
Model structures
Simulated annealing
Porous materials
slabs
Electron microscopes
electron microscopes
dipoles

Cite this

@article{e1ed1a396c6f4ddba3ecfe24e31ab9fa,
title = "Light-scattering efficiency of starch acetate pigments as a function of size and packing density",
abstract = "We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50{\%} (large cylindrical slabs) or at 37{\%} or 57{\%} (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4  μm.",
author = "Antti Penttil{\"a} and Kari Lumme and Lauri Kuutti",
year = "2006",
doi = "10.1364/AO.45.003501",
language = "English",
volume = "45",
pages = "3501--3509",
journal = "Applied Optics",
issn = "1559-128X",
publisher = "Optical Society of America OSA",
number = "15",

}

Light-scattering efficiency of starch acetate pigments as a function of size and packing density. / Penttilä, Antti; Lumme, Kari; Kuutti, Lauri.

In: Applied Optics, Vol. 45, No. 15, 2006, p. 3501-3509.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Light-scattering efficiency of starch acetate pigments as a function of size and packing density

AU - Penttilä, Antti

AU - Lumme, Kari

AU - Kuutti, Lauri

PY - 2006

Y1 - 2006

N2 - We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50% (large cylindrical slabs) or at 37% or 57% (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4  μm.

AB - We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50% (large cylindrical slabs) or at 37% or 57% (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4  μm.

U2 - 10.1364/AO.45.003501

DO - 10.1364/AO.45.003501

M3 - Article

VL - 45

SP - 3501

EP - 3509

JO - Applied Optics

JF - Applied Optics

SN - 1559-128X

IS - 15

ER -