02366naa a2200373 a 450000100080000000500110000800800410001902400350006010000210009524501870011626000090030352012580031265000150157065000180158565000150160365000210161865000140163965000170165365000170167065000160168765300190170365300180172265300140174065300180175465300220177265300200179470000170181470000160183170000170184770000190186470000320188370000240191577300530193921093542019-10-30       2019    bl uuuu     u00u1 u    #d7 a10.1007/s10570-018-2161-02DOI1 aMALUCELLI, L. C.  aInfluence of cellulose chemical pretreatment on energy consumption and viscosity of produced cellulose nanofibers (CNF) and mechanical properties of nanopaper.h[electronic resource]  c2019  aLignocellulosic fibers are the main sources for producing nanocellulose, in which mechanical methods are the most appropriate to achieve a high yield and generate low residue. High energy consumption is the major drawback in these processes, although they are the cheapest way to produce nanocellulose. Chemical pretreatment is one approach to further decrease the overall cost during defibrillation; however, the influence over sample viscosity and mechanical properties is yet to be investigated. Here, we study the influence of chemical pretreatments using NaOH and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) on the mechanical, rheological and structural properties of cellulose nanofibers made from bleached eucalyptus pulp. Modification of samples was evidenced by their respective peaks on FTIR spectra. Sample crystallinity increased after partial hemicellulose and amorphous cellulose removal. In addition, a strong correlation between grinding efficiency and lower energy consumption was observed. However, a mild alkaline treatment may improve fiber strength at the expense of suspension stability and energy consumption. Modified nanofibers presented good potential for enhancing mechanical properties and/or improving suspension stability.  aAlkalinity  aHemicellulose  aNanofibers  aSodium hydroxide  aViscosity  aAlcalinidade  aHemicelulose  aViscosidade  aDisintegration  aNanocellulose  aNanofibra  aPretreatments  aProcessing energy  aTEMPO-oxidation1 aMATOS, M. de1 aJORDÃO, C.1 aLOMONACO, D.1 aLACERDA, L. G.1 aCARVALHO FILHO, M. A. da S.1 aMAGALHAES, W. L. E.  tCellulosegv. 26, n. 3, p. 1667-1681, Feb. 2019.