Effect of carboxymethyl cellulose and polyvinyl alcohol on the cracking of particulate coating layers

Kyudeok Oh; Sunhyung Kim; Zhenghui Shen; Min Hwan Jeong; Martti Toivakka; Hak Lae Lee

doi:10.1016/j.porgcoat.2022.106951

Effect of carboxymethyl cellulose and polyvinyl alcohol on the cracking of particulate coating layers

Kyudeok Oh, Sunhyung Kim, Zhenghui Shen, Min Hwan Jeong, Martti Toivakka, Hak Lae Lee

Laboratory of Natural Materials Technology

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Abstract

We investigated the effect of polymers on the cracking of particulate coating layers. Carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) were used as contrasting polymer additives due to their different surface charges and film characteristics. Drying stress that generates cracking in particulate layers increased with the addition of both polymers. However, there was a large difference in the critical cracking thickness (CCT) depending on the two polymers, indicating that the structural and mechanical properties of particulate layers varied with the nature of polymer additive. A strong positive correlation was observed between the toughness and CCT of the particulate layer. Compared with particulate layers containing CMC, those containing PVA exhibited 77.8% higher CCT because denser and tougher layers were formed when PVA was added to the coating suspension. Our findings clearly demonstrate that cracking of coating layer can be prevented by improving the toughness of the layer.

Original language	English
Article number	106951
Journal	Progress in Organic Coatings
Volume	170
DOIs	https://doi.org/10.1016/j.porgcoat.2022.106951
Publication status	Published - 1 Sept 2022
MoE publication type	A1 Journal article-refereed

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title = "Effect of carboxymethyl cellulose and polyvinyl alcohol on the cracking of particulate coating layers",

abstract = "We investigated the effect of polymers on the cracking of particulate coating layers. Carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) were used as contrasting polymer additives due to their different surface charges and film characteristics. Drying stress that generates cracking in particulate layers increased with the addition of both polymers. However, there was a large difference in the critical cracking thickness (CCT) depending on the two polymers, indicating that the structural and mechanical properties of particulate layers varied with the nature of polymer additive. A strong positive correlation was observed between the toughness and CCT of the particulate layer. Compared with particulate layers containing CMC, those containing PVA exhibited 77.8% higher CCT because denser and tougher layers were formed when PVA was added to the coating suspension. Our findings clearly demonstrate that cracking of coating layer can be prevented by improving the toughness of the layer.",

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T1 - Effect of carboxymethyl cellulose and polyvinyl alcohol on the cracking of particulate coating layers

AU - Oh, Kyudeok

AU - Kim, Sunhyung

AU - Shen, Zhenghui

AU - Jeong, Min Hwan

AU - Toivakka, Martti

AU - Lee, Hak Lae

PY - 2022/9/1

Y1 - 2022/9/1

N2 - We investigated the effect of polymers on the cracking of particulate coating layers. Carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) were used as contrasting polymer additives due to their different surface charges and film characteristics. Drying stress that generates cracking in particulate layers increased with the addition of both polymers. However, there was a large difference in the critical cracking thickness (CCT) depending on the two polymers, indicating that the structural and mechanical properties of particulate layers varied with the nature of polymer additive. A strong positive correlation was observed between the toughness and CCT of the particulate layer. Compared with particulate layers containing CMC, those containing PVA exhibited 77.8% higher CCT because denser and tougher layers were formed when PVA was added to the coating suspension. Our findings clearly demonstrate that cracking of coating layer can be prevented by improving the toughness of the layer.

AB - We investigated the effect of polymers on the cracking of particulate coating layers. Carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA) were used as contrasting polymer additives due to their different surface charges and film characteristics. Drying stress that generates cracking in particulate layers increased with the addition of both polymers. However, there was a large difference in the critical cracking thickness (CCT) depending on the two polymers, indicating that the structural and mechanical properties of particulate layers varied with the nature of polymer additive. A strong positive correlation was observed between the toughness and CCT of the particulate layer. Compared with particulate layers containing CMC, those containing PVA exhibited 77.8% higher CCT because denser and tougher layers were formed when PVA was added to the coating suspension. Our findings clearly demonstrate that cracking of coating layer can be prevented by improving the toughness of the layer.

U2 - 10.1016/j.porgcoat.2022.106951

DO - 10.1016/j.porgcoat.2022.106951

M3 - Article

SN - 0300-9440

VL - 170

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

M1 - 106951

ER -

Effect of carboxymethyl cellulose and polyvinyl alcohol on the cracking of particulate coating layers

Abstract

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