O-20　Compatibility of cellulose nanofibers produced by wet milling with enzymatic pretreatment for undercoat paint

Abstract

Cellulose nanofibers(CNFs)were produced from soda-anthraquinone digested pulps (soda-AQ pulps) and commercially available kraft pulps by wet grinding in combination with enzymatic pretreatment. Previous study showed the effect of CNF-blended undercoat paint to prevent the fading of wood panels under accelerated weathering test. In this study, we blended CNFs with acrylic resin emulsion to examine their compatibility as waterborne undercoat pant.

When the conditions for producing CNFs from pulps were the same, the properties of pulps affected CNF properties.

CNF derived from Sugi soda-AQ showed the highest compatibility for CNF-blended undercoat paint , with good dispersibility in varnish. One of the reasons for this result might due to the low degree of polymerization of Sugi soda-AQ CNF. In the dispersibility test of derivatized CNF into mineral spirit, the effect of dodecylation was confirmed.