Effect of coating type and grammage of printing paper on water drop contact angle over time

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ASADI KHANSARI R.; DEHGHANI FIROUZABADI M.; RESALATI H.

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Journal Paper

Paper Information

Journal: Iranian Journal of Wood and Paper Science Research Year:2020 | Volume:35 | Issue:2 (71) Page(s): 165-177

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Information Journal Paper

Title

Effect of coating type and grammage of printing paper on water drop contact angle over time

Author(s)

ASADI KHANSARI R. | DEHGHANI FIROUZABADI M. | RESALATI H. | Issue Writer Certificate

Keywords

CoatingQ1

grammageQ1

contact angleQ1

calcium carbonateQ1

cellulose nanofibersQ1

Abstract

The purpose of this research is to evaluate the effect of various paper Coatings on initial contact angle and its evolution over time. We investigated nine Coatings on two types of (75 and 125 g/m2) printing papers. Seven Coating compositions containing 80% clay, 20% ground calcium carbonate, dispersing agent and various levels of polyvinyl acetate and lactic acid as binders were used. In the last two Coatings (No. 8 and 9), we used 100% precipitated calcium carbonate pigments, cationic starch, methacrylate, dispersant and two levels of cellulose nanofibers. In these suspensions, the amount of cellulose nanofibers in composition No. 8 was twice that of the composition 9. After Coating using rod method, the papers were dried and then the coated and control samples were calendered. We then performed contact angle measurements using water droplet and also Kit No were performed. We noticed largest and smallest angle change over time for sample 6 containing 75% binder. The last two treatments (No. 8 and 9), contained cellulose nanofibers, which was due to presence of hydroxyl group on the surface and lowered the contact angle. The eighth suspension was the most hydrophilic sample. Best barrier property Kit No and largest droplet volume after 20 seconds was accompanied with the increase of the binder percentage in the formulation. For the control sample and three treatments with highest binders, the contact angle over time remains relatively constant this is a sign of hydrophobicity. The correlation between contact angle and volume of the water droplet was determined to be 0. 951 and 0. 936 in the 75g/m2 and 125g/m2 papers relatively. We did not notice a significant difference in contact angle and Kit No between 75g and 125g samples.

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APA: Copy

ASADI KHANSARI, R., DEHGHANI FIROUZABADI, M., & RESALATI, H.. (2020). Effect of coating type and grammage of printing paper on water drop contact angle over time. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 35(2 (71) ), 165-177. SID. https://sid.ir/paper/392081/en

Vancouver: Copy

ASADI KHANSARI R., DEHGHANI FIROUZABADI M., RESALATI H.. Effect of coating type and grammage of printing paper on water drop contact angle over time. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2020;35(2 (71) ):165-177. Available from: https://sid.ir/paper/392081/en

IEEE: Copy

R. ASADI KHANSARI, M. DEHGHANI FIROUZABADI, and H. RESALATI, “Effect of coating type and grammage of printing paper on water drop contact angle over time,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 35, no. 2 (71) , pp. 165–177, 2020, [Online]. Available: https://sid.ir/paper/392081/en

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