The chromatographic separation of anionic dye in inkjet coating structures

Taina Lamminmäki (Corresponding Author), John Kettle, Pasi Puukko, P. A. C. Gane

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

During the ink setting process on coated inkjet paper, the porosity and pore size distribution of the coating structure determines how much, in which direction and at what speed the surface can absorb the ink. The capillary and permeation flow drives the liquid into the structure and controls the volume flow, respectively. The coating binder, quite often polyvinyl alcohol, has an effect on the inkjet ink imbibition by occupying a proportion of the available pore volume and absorbing via swelling of the polymer matrix. The aim of this work is to clarify the role of the porous structure and the coexistent swelling of binder during the liquid imbibition, with special attention paid to the fixation of dye and its distribution during the chromatographic separation process. The results confirm that water molecules diffuse into and within hydrophilic polyvinyl alcohol binder causing the binder swelling. The swelling affects the number of active small pores remaining available for capillarity, by reducing the diameter and volume of the remaining free pores, thus slowing the capillary flow, such that the permeation flow rapidly becomes the rate determining step rather than the desired fine capillary-driven liquid imbibition. On the other hand, water molecules diffusing into the binder structure open the polymer network so that the colorant molecules can also fit into it. This mechanism is reflected in the observation that, in the case of dye-based inks, there is always a clear (non-coloured) wetting front advancing before the colour front. The swelling binder, therefore, though reducing absorption dynamic, does act to provide sorbtion volume and surface for colorant, aiding an otherwise coating surface area limited function in respect to dye capture and fixation.
Original languageEnglish
Pages (from-to)304-311
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume377
Issue number1-3
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

swelling
Binders
inks
Coloring Agents
Dyes
dyes
Swelling
porosity
coatings
Ink
Coatings
capillary flow
polyvinyl alcohol
Polyvinyl Alcohol
Polyvinyl alcohols
Permeation
liquids
Molecules
Liquids
molecules

Keywords

  • Absorption
  • diffusion
  • porosity
  • ink penetration
  • thin layer chromatography
  • ink dye adsorption
  • inkjet printing
  • coating
  • Mercury intrusion porosity

Cite this

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title = "The chromatographic separation of anionic dye in inkjet coating structures",
abstract = "During the ink setting process on coated inkjet paper, the porosity and pore size distribution of the coating structure determines how much, in which direction and at what speed the surface can absorb the ink. The capillary and permeation flow drives the liquid into the structure and controls the volume flow, respectively. The coating binder, quite often polyvinyl alcohol, has an effect on the inkjet ink imbibition by occupying a proportion of the available pore volume and absorbing via swelling of the polymer matrix. The aim of this work is to clarify the role of the porous structure and the coexistent swelling of binder during the liquid imbibition, with special attention paid to the fixation of dye and its distribution during the chromatographic separation process. The results confirm that water molecules diffuse into and within hydrophilic polyvinyl alcohol binder causing the binder swelling. The swelling affects the number of active small pores remaining available for capillarity, by reducing the diameter and volume of the remaining free pores, thus slowing the capillary flow, such that the permeation flow rapidly becomes the rate determining step rather than the desired fine capillary-driven liquid imbibition. On the other hand, water molecules diffusing into the binder structure open the polymer network so that the colorant molecules can also fit into it. This mechanism is reflected in the observation that, in the case of dye-based inks, there is always a clear (non-coloured) wetting front advancing before the colour front. The swelling binder, therefore, though reducing absorption dynamic, does act to provide sorbtion volume and surface for colorant, aiding an otherwise coating surface area limited function in respect to dye capture and fixation.",
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The chromatographic separation of anionic dye in inkjet coating structures. / Lamminmäki, Taina (Corresponding Author); Kettle, John; Puukko, Pasi; Gane, P. A. C.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 377, No. 1-3, 2011, p. 304-311.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The chromatographic separation of anionic dye in inkjet coating structures

AU - Lamminmäki, Taina

AU - Kettle, John

AU - Puukko, Pasi

AU - Gane, P. A. C.

PY - 2011

Y1 - 2011

N2 - During the ink setting process on coated inkjet paper, the porosity and pore size distribution of the coating structure determines how much, in which direction and at what speed the surface can absorb the ink. The capillary and permeation flow drives the liquid into the structure and controls the volume flow, respectively. The coating binder, quite often polyvinyl alcohol, has an effect on the inkjet ink imbibition by occupying a proportion of the available pore volume and absorbing via swelling of the polymer matrix. The aim of this work is to clarify the role of the porous structure and the coexistent swelling of binder during the liquid imbibition, with special attention paid to the fixation of dye and its distribution during the chromatographic separation process. The results confirm that water molecules diffuse into and within hydrophilic polyvinyl alcohol binder causing the binder swelling. The swelling affects the number of active small pores remaining available for capillarity, by reducing the diameter and volume of the remaining free pores, thus slowing the capillary flow, such that the permeation flow rapidly becomes the rate determining step rather than the desired fine capillary-driven liquid imbibition. On the other hand, water molecules diffusing into the binder structure open the polymer network so that the colorant molecules can also fit into it. This mechanism is reflected in the observation that, in the case of dye-based inks, there is always a clear (non-coloured) wetting front advancing before the colour front. The swelling binder, therefore, though reducing absorption dynamic, does act to provide sorbtion volume and surface for colorant, aiding an otherwise coating surface area limited function in respect to dye capture and fixation.

AB - During the ink setting process on coated inkjet paper, the porosity and pore size distribution of the coating structure determines how much, in which direction and at what speed the surface can absorb the ink. The capillary and permeation flow drives the liquid into the structure and controls the volume flow, respectively. The coating binder, quite often polyvinyl alcohol, has an effect on the inkjet ink imbibition by occupying a proportion of the available pore volume and absorbing via swelling of the polymer matrix. The aim of this work is to clarify the role of the porous structure and the coexistent swelling of binder during the liquid imbibition, with special attention paid to the fixation of dye and its distribution during the chromatographic separation process. The results confirm that water molecules diffuse into and within hydrophilic polyvinyl alcohol binder causing the binder swelling. The swelling affects the number of active small pores remaining available for capillarity, by reducing the diameter and volume of the remaining free pores, thus slowing the capillary flow, such that the permeation flow rapidly becomes the rate determining step rather than the desired fine capillary-driven liquid imbibition. On the other hand, water molecules diffusing into the binder structure open the polymer network so that the colorant molecules can also fit into it. This mechanism is reflected in the observation that, in the case of dye-based inks, there is always a clear (non-coloured) wetting front advancing before the colour front. The swelling binder, therefore, though reducing absorption dynamic, does act to provide sorbtion volume and surface for colorant, aiding an otherwise coating surface area limited function in respect to dye capture and fixation.

KW - Absorption

KW - diffusion

KW - porosity

KW - ink penetration

KW - thin layer chromatography

KW - ink dye adsorption

KW - inkjet printing

KW - coating

KW - Mercury intrusion porosity

U2 - 10.1016/j.colsurfa.2011.01.026

DO - 10.1016/j.colsurfa.2011.01.026

M3 - Article

VL - 377

SP - 304

EP - 311

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 1-3

ER -