Surface Modification of Nanocrystalline Cellulose and its Application in the Deinked Pulp

Abstract:

In this study, nanocrystalline cellulose (NCC), isolated from the bleached aspen kraft pulp, was surface modified using borate. The resultant nanocrystal suspensions, namely B-NCC, were characterized by conductometric titration and atomic force microscope (AFM). B-NCC was then applied as a retention aid in the bleached old newsprint deinked pulp. The results showed that the modification process led to a negative increase in surface charge density, while the particle size was not changed. The fines retention and pulp drainability were increased when the B-NCC was used either alone as the monocomponent retention aid, or together with cationic polyacrylamide (CPAM) to constitute a microparticle retention system. The microparticle retention system gave better retention and drainage rate, with the maximum values of 90.5% and 3.5 ml/s, respectively.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2662-2666
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2662
• Online since: September 2013
• Authors: Jing Li, Qing Hua Xu*, Li Qiang Jin
• Keywords: Borate, Deinked Pulp, Nanocrystalline Cellulose, Retention, Surface Modification

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