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Article

Influence of Chemical Pre-Treatments and Ultrasonication on the Dimensions and Appearance of Cellulose Fibers

1
Faculty of Forestry and Wood Technology, Poznan University of Life Sciences, Wojska Polskiego 28, 60-637 Poznan, Poland
2
NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
*
Author to whom correspondence should be addressed.
Materials 2020, 13(22), 5274; https://doi.org/10.3390/ma13225274
Received: 21 October 2020 / Revised: 10 November 2020 / Accepted: 18 November 2020 / Published: 21 November 2020
(This article belongs to the Section Biomaterials)
Due to the wider use of nanocellulose in various areas of economic life, better and more optimal methods of obtaining nanocellulose are constantly being sought. Therefore, an attempt was made to evaluate the hybrid cellulose treatment, based on the use of a chemical method combined with an ultrasound of medium frequency. The study employs two different starting materials (Södra Black R cellulose or microcrystalline cellulose), two types of chemical pre-treatments (acid hydrolysis or oxidation), and two sonication durations. It was found that the reduction fiber cross-sectional dimensions was the result of prolonged exposure of cellulose to the ultrasound. From Södra Black R and the microcrystalline cellulose nanometer scale, structures were obtained in the form of isolated fibers. The TEMPO reagent accelerated the degradation process of two cellulose varieties due to its oxidizing character. The resulting products had nanofibrous structures. Cellulose degradation as a result of the combined action of sonication and TEMPO activity progressed gradually. Places of fiber degradation were characterized by their longitudinal breakage and initiated the next stages of the defibering process. View Full-Text
Keywords: cellulose; MCC; nanocellulose; CNC; CNF; ultrasonication; TEMPO; SEM cellulose; MCC; nanocellulose; CNC; CNF; ultrasonication; TEMPO; SEM
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MDPI and ACS Style

Mazela, B.; Perdoch, W.; Peplińska, B.; Zieliński, M. Influence of Chemical Pre-Treatments and Ultrasonication on the Dimensions and Appearance of Cellulose Fibers. Materials 2020, 13, 5274. https://doi.org/10.3390/ma13225274

AMA Style

Mazela B, Perdoch W, Peplińska B, Zieliński M. Influence of Chemical Pre-Treatments and Ultrasonication on the Dimensions and Appearance of Cellulose Fibers. Materials. 2020; 13(22):5274. https://doi.org/10.3390/ma13225274

Chicago/Turabian Style

Mazela, Bartłomiej, Waldemar Perdoch, Barbara Peplińska, and Mikołaj Zieliński. 2020. "Influence of Chemical Pre-Treatments and Ultrasonication on the Dimensions and Appearance of Cellulose Fibers" Materials 13, no. 22: 5274. https://doi.org/10.3390/ma13225274

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