Universidad Complutense de Madrid
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Direct Production of Cellulose Nanocrystals from Old Newspapers and Recycled Newsprints

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Campano, Cristina and Miranda, Rubén and Merayo, Noemí and Negro, Carlos and Blanco, Ángeles (2017) Direct Production of Cellulose Nanocrystals from Old Newspapers and Recycled Newsprints. Carbohydrate Polymers . ISSN 0144-8617 (In Press)

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Official URL: http://www.sciencedirect.com/science/article/pii/S0144861717305908



Abstract

Cellulose nanocrystals (CNC) are high added value products which can be used in many applications. In this research, CNC were directly produced from two recycled papers: old newspapers (ONP) and 100% recycled newsprint (NP). CNC were also obtained from NP by previously isolating the cellulose particles by alkali and bleaching treatments. CNC yield and quality was assessed through lignin and ash determination, X-ray diffraction analysis, atomic force microscopy and thermogravimetric analysis. Not only crystallinities resulted similar (92-95%), but also aspect ratios (L/d) (each in the range of 50-120). However, different CNC purities and hydrolysis and process yields were obtained. Thus, CNC purity decreased from 93 to 77%, hydrolysis yield was reduced from 64 to 58% but process yield strongly improved from 35 to 60% when no pretreatment was used. Therefore, this study proves the viability of the direct production of CNC from recycled papers.


Item Type:Article
Uncontrolled Keywords:Cellulose nanocrystals, newsprint, recycled paper, process yield, alkali and bleaching pretreatments, old newspaper
Subjects:Sciences > Chemistry > Paper industry
Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Environmental conditions
ID Code:42998
Deposited On:30 May 2017 08:48
Last Modified:17 May 2018 23:01

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