Elucidating the mechanisms of liquid and vapour transport during drying of porous coatings

Joel Songok; Douglas Bousfield; Cathy Ridgway; Patrick Gane; Martti Toivakka

Elucidating the mechanisms of liquid and vapour transport during drying of porous coatings

Joel Songok, Douglas Bousfield, Cathy Ridgway, Patrick Gane, Martti Toivakka

Research output: Chapter in Book/Conference proceeding › Conference contribution › Scientific › peer-review

Abstract

The influence of the coating composition of a porous paper coating on the evaporation rate of water contained in the sample has been studied experimentally. For low-content latex samples, drying was found to be mainly controlled by capillarity, perhaps also in the form of thin film pore surface feature/wall wetting, which drew water from the connected pores to the drying surface or near the surface. This led to a lengthy constant drying rate period (CDRP) where nearly 70 % of the saturated water was evaporated. High-content latex samples, characterized by low porosity and permeability showed shorter CDRP and lengthy falling drying rate period. The drying rate curve varied as the square root of time, indicating a diffusive controlled mechanism. Low latex content samples took less time to dry, which can be inferred to mean they require less drying energy.

Original language	Undefined/Unknown
Title of host publication	12th TAPPI Advanced Coating Fundamentals Symposium
Publisher	TAPPI Press
Pages	415–425
Publication status	Published - 2012
MoE publication type	A4 Article in a conference publication
Event	TAPPI Advanced Coating Fundamentals Symposium - Loews Atlanta Hotel, Atlanta GA Duration: 10 Sept 2012 → 12 Sept 2012

Conference

Conference	TAPPI Advanced Coating Fundamentals Symposium
Period	10/09/12 → 12/09/12

Cite this

@inproceedings{fbbea3b5591a4cb2bf53ffa0258c84bd,

title = "Elucidating the mechanisms of liquid and vapour transport during drying of porous coatings",

abstract = "The influence of the coating composition of a porous paper coating on the evaporation rate of water contained in the sample has been studied experimentally. For low-content latex samples, drying was found to be mainly controlled by capillarity, perhaps also in the form of thin film pore surface feature/wall wetting, which drew water from the connected pores to the drying surface or near the surface. This led to a lengthy constant drying rate period (CDRP) where nearly 70 % of the saturated water was evaporated. High-content latex samples, characterized by low porosity and permeability showed shorter CDRP and lengthy falling drying rate period. The drying rate curve varied as the square root of time, indicating a diffusive controlled mechanism. Low latex content samples took less time to dry, which can be inferred to mean they require less drying energy.",

author = "Joel Songok and Douglas Bousfield and Cathy Ridgway and Patrick Gane and Martti Toivakka",

year = "2012",

language = "Odefinierat/ok{\"a}nt",

pages = "415–425",

booktitle = "12th TAPPI Advanced Coating Fundamentals Symposium",

publisher = "TAPPI Press",

note = "TAPPI Advanced Coating Fundamentals Symposium ; Conference date: 10-09-2012 Through 12-09-2012",

}

TY - GEN

T1 - Elucidating the mechanisms of liquid and vapour transport during drying of porous coatings

AU - Songok, Joel

AU - Bousfield, Douglas

AU - Ridgway, Cathy

AU - Gane, Patrick

AU - Toivakka, Martti

PY - 2012

Y1 - 2012

N2 - The influence of the coating composition of a porous paper coating on the evaporation rate of water contained in the sample has been studied experimentally. For low-content latex samples, drying was found to be mainly controlled by capillarity, perhaps also in the form of thin film pore surface feature/wall wetting, which drew water from the connected pores to the drying surface or near the surface. This led to a lengthy constant drying rate period (CDRP) where nearly 70 % of the saturated water was evaporated. High-content latex samples, characterized by low porosity and permeability showed shorter CDRP and lengthy falling drying rate period. The drying rate curve varied as the square root of time, indicating a diffusive controlled mechanism. Low latex content samples took less time to dry, which can be inferred to mean they require less drying energy.

AB - The influence of the coating composition of a porous paper coating on the evaporation rate of water contained in the sample has been studied experimentally. For low-content latex samples, drying was found to be mainly controlled by capillarity, perhaps also in the form of thin film pore surface feature/wall wetting, which drew water from the connected pores to the drying surface or near the surface. This led to a lengthy constant drying rate period (CDRP) where nearly 70 % of the saturated water was evaporated. High-content latex samples, characterized by low porosity and permeability showed shorter CDRP and lengthy falling drying rate period. The drying rate curve varied as the square root of time, indicating a diffusive controlled mechanism. Low latex content samples took less time to dry, which can be inferred to mean they require less drying energy.

M3 - Konferensbidrag

SP - 415

EP - 425

BT - 12th TAPPI Advanced Coating Fundamentals Symposium

PB - TAPPI Press

T2 - TAPPI Advanced Coating Fundamentals Symposium

Y2 - 10 September 2012 through 12 September 2012

ER -