A green and environmental benign method to extract cellulose nanocrystal by ball mill assisted solid acid hydrolysis. (20th September 2018)

• Record Type: Journal Article
• Authors: Song, Kaili; Ji, Yating; Wang, Li; Wei, Yuhui; Yu, Zhicheng
• Is Part Of: Journal of cleaner production. Volume 196(2018)
• Page Start: 1169
• Page End: 1175
• Publication Date: 2018-09-20
• Subjects: Ball milling -- Cellulose nanocrystal -- Solid acid hydrolysis -- Recyclable; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.06.128
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: In this study, an environmentally friendly strategy for the extraction of cellulose nanocrystal (CNC) by ball mill assisted fully recyclable solid acid hydrolysis of cellulose fiber was developed. Thanks to the low water solubility, the acid could be easily and conveniently recovered after hydrolysis reaction. The solid acid can be fully recovered by simply recrystallization at lower temperature and reused as acid source to extract cellulose nanocrystal without losing their acidity. The effect of extraction parameters, such as ball mill time, concentration of solid acid, reaction temperature and time on the morphology and yield of CNC were comprehensively studied. A relatively high yield of 59% and maximum degradation temperature of 332 °C was achieved by this novel solid acid hydrolysis method. The ability to reuse the solid acid by a simple and conventionally proven recrystallization method make this method extremely suitable for green and sustainable produce of cellulose nanocrystal. Graphical abstract: A greener and cleaner method for extracting cellulose nanocrystal by ball mill assisted organic aid hydrolysis was developed. Due to the low water solubility, organic acids can be easily recovered after hydrolysis reactions through crystallization at a lower or ambient temperature and the obtained CNC showed improved thermal stability. Image Highlights: A greener and cleaner method for extracting CNC is developed. Organic acid can be easily recovered after hydrolysis through crystallization. The ability to recover acid makes the organic acids suitable for production of CNC. The obtained CNCs show improved thermal stability. Effect of ball mill time and hydrolysis condition was systematically studied.