The functionalisation of papermaking fibres using inorganic nanoparticles was investigated as a novel approach. Different layered double hydroxide (LDH) particles were used in peroxide bleaching of thermo mechanical pulp (TMP) and in oxygen bleaching of eucalyptus kraft pulp. LDH particles were also tested as binding sites for optical brightening agents (OBA) that are commonly used in paper production. The surface chemistry of LDH treated pulps was examined using X-ray photoelectron spectroscopy (XPS) and apparent contact angle with water. LDH particles modified with terephthalic acid decreased inefficient hydrogen peroxide consumption in TMP bleaching and increased the opacity. Paper strength properties were maintained. The retention of OBA was also enhanced onto TMP fibres modified with LDH particles. LDH enhanced the selectivity of oxygen delignification of kraft pulp, leading to higher brightness gain and reduction in Kappa number. LDH proved to have great potential for current and prospective applications in pulp and paper manufacture

Potential applications of hybrid LDH nanoparticles in pulp and paper production

247th National Meeting (2014)

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