In recent years, the researches for sustainable, green and environmental friendly materials are increasing. Also seeks to reduce the generation of residues. The use of lignocellulosic biomass is a possible alternative to reuse solid waste. This type of biomass is found worldwide, including agricultural, forest, municipal and industrial waste. The paper industry is considered one of the most polluting industries in the world. The majority paper industry waste is incinerated. However, these residues have large amount of cellulosic material, and it can be repurposed in the isolation of cellulose nanostructures. The objective of this work was the mechanical isolation of nanocellulose from primary waste of paper industry by the ball milling. Also, it aimed at comparing three milling times (4, 6 and 24 hours) and two pretreatment methods (mercerization with acid and with detergent). The waste was mercerized for removal of oils and greases, bleached for lignin removal and milled for isolation of cellulose nanostructures (CNS). The composition was analyzed by Fourier transform infrared spectrophotometry (FTIR). The thermal stability was evaluated by thermogravimetric analysis (TGA). Scanning electron microscopy (SEM) shows the morphologies of CNS and the sizes were measured by dynamic light scattering technique (DLS). The nanocellulose samples show higher purity than the virgin sample (paper waste), and lower thermal stability. SEM showed agglomerates formed due to drying the samples. The samples milled during 24 hours show lower particle sizes for both pretreatment methods. The smaller particles mercerized with acid have size between 28,75 nm e 1,59 µm, and size between 31,05 nm e 1,33 µm for the smaller particles mercerized with detergent. The sample was mercerized with acid shows more homogeneous as compared with mercerized samples with detergent. However, both exhibit wide variation in particle size, suggesting the presence of agglomerates. This work obtained successful to isolation nanostructure of cellulose in all evaluated parameters.<br/>

Mechanical isolation of nanocellulose from paper industry waste by ball mining

253rd National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.