Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/89367
Title: Cellulose micro and nanofibrils as coating agent for improved printability in office papers
Authors: Lourenço, Ana F.
Gamelas, José A. F.
Sarmento, Pedro
Ferreira, Paulo Jorge Tavares 
Keywords: Cellulose micro/nano fibrils; Gamut area; Inkjet printing; Paper; Print-through
Issue Date: 8-May-2020
Publisher: Springer
Project: SFRH/BDE/ 108095/2015 
Serial title, monograph or event: Cellulose
Abstract: The use of nanocelluloses is being conducted for the most diverse applications. Their performance as coating agent has been mainly explored to improve barrier properties, as they emerge as perfect candidate for plastic substitution, but it is also important to explore their potential to improve printing quality. In the present work, the influence of different nanocelluloses, obtained through mechanical, enzymatic, TEMPO-mediated oxidation and carboxymethylation treatments, in the coating process and inkjet printability of office papers was assessed. The results revealed that the cellulose nanofibrils are better for printability than the microfibrils. But the size and charge of the former must be taken into account, since fibrils of very small size penetrate the paper structure, dragging the pigments from the surface, and very anionic nanofibrils can also have negative influence on the optical density. Besides, an interesting synergy between surface-sizing starch and the cellulose nanofibrils was found to occur as the latter closed the paper structure, which prevented starch from penetrating, while potentiating both of their positive effects on ink pigment entrapment. An additional study of characterization of inkjet pigments was also performed.
URI: http://hdl.handle.net/10316/89367
ISSN: 0969-0239
DOI: 10.1007/s10570-020-03184-9
Rights: embargoedAccess
Appears in Collections:I&D CIEPQPF - Artigos em Revistas Internacionais

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