ORIGINAL RESEARCH Characterization of spray-dried nanoﬁbrillated cellulose and effect of different homogenization methods on the stability and rheological properties of the reconstituted suspension Maraysa R. Furtado . Virgı ´nia M. da Matta . Carlos W. P. Carvalho . Washington L. E. Magalha ˜es . Andre ´ L. Rossi . Renata V. Tonon Received: 1 February 2020 / Accepted: 5 October 2020 Ó Springer Nature B.V. 2020 Abstract In the present study, a suspension of nanoﬁbrillated cellulose from eucalyptus was spray- dried in order to obtain a powdered material that could be easily transported and stored. The original suspen- sion and the dried material were characterized for their physical, morphological and thermal properties. An increase in crystallinity and reduction in thermal stability were observed after drying. In addition, the ﬁbrils size passed from nano to micro scale The powder obtained was rehydrated and homogenized by two methods: rotor-stator homogenization (5000, 10,000 and 15,000 rpm) and ultrasound (10, 30 and 50% maximum amplitude), during 3 and 5 min, in order to verify the possibility of obtaining a stable re- constituted suspension comparable to the original one. Higher treatment intensities resulted in suspensions with higher viscosity and stability. The suspension homogenized by ultrasound at 50% amplitude for 5 minutes was the most stable one and restored the nano dimensions of the original suspension. Both the original and the reconstituted suspensions showed a shear thinning and ‘‘gel-like’’ behavior. Higher Ultra- Turrax speed and ultrasound amplitude resulted in higher viscoelastic modulus (G 0 and G 00 ), although these values were lower than those found in the initial nanocellulose suspension. M. R. Furtado Instituto de Quı ´mica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil e-mail: maraysafurtado@hotmail.com V. M. da Matta  C. W. P. Carvalho  R. V. Tonon (&) Embrapa Agroindu ´stria de Alimentos, Rio de Janeiro, RJ, Brazil e-mail: renata.tonon@embrapa.br V. M. da Matta e-mail: virginia.matta@embrapa.br C. W. P. Carvalho e-mail: carlos.piler@embrapa.br W. L. E. Magalha ˜es Embrapa Florestas, Colombo, PR, Brazil e-mail: washington.magalhaes@embrapa.br A. L. Rossi Centro Brasileiro de Pesquisas Fı ´sicas, Rio de Janeiro, RJ, Brazil e-mail: andrelinharesrossi@gmail.com 123 Cellulose https://doi.org/10.1007/s10570-020-03516-9