TY - JOUR

T1 - Cellulose nanocrystals with different length-to-diameter ratios extracted from various plants using novel system acetic acid/phosphotungstic acid/octanol-1

AU - Torlopov, Mikhail A.

AU - Mikhaylov, Vasiliy I.

AU - Udoratina, Elena V.

AU - Aleshina, Lyudmila A.

AU - Prusskii, Andrey I.

AU - Tsvetkov, Nikolay V.

AU - Krivoshapkin, Pavel V.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - The novel system [acetic acid/phosphotungstic acid (H3PW12O40)/octanol] was proposed for catalytic solvolysis of cellulose and for obtaining cellulose nanocrystals (CNC). Several alternative experiments involving mixtures with different compositions were carried out; reaction time was also varied. CNC particles from cotton, linen, softwood and hardwood cellulose were prepared in the experiments performed for 40 min in the presence of 0.25 mol% of the heteropolyacid. CNC samples were characterized by transmission electron microscopy and atomic force microscopy, X-ray diffraction analysis, and thermogravimetric analysis. It was established that the resulting nanoparticles had high crystallinity and rod-like shape; their length varied from 160 to 400 nm (cotton CNC had the shortest length, and linen CNC had the longest length), and CNC thickness ranged from 6 to 10 nm. Thermal stability of CNC was lower than that of initial celluloses and decreasing in the following sequence: cotton > softwood > hardwood > linen cellulose.

AB - The novel system [acetic acid/phosphotungstic acid (H3PW12O40)/octanol] was proposed for catalytic solvolysis of cellulose and for obtaining cellulose nanocrystals (CNC). Several alternative experiments involving mixtures with different compositions were carried out; reaction time was also varied. CNC particles from cotton, linen, softwood and hardwood cellulose were prepared in the experiments performed for 40 min in the presence of 0.25 mol% of the heteropolyacid. CNC samples were characterized by transmission electron microscopy and atomic force microscopy, X-ray diffraction analysis, and thermogravimetric analysis. It was established that the resulting nanoparticles had high crystallinity and rod-like shape; their length varied from 160 to 400 nm (cotton CNC had the shortest length, and linen CNC had the longest length), and CNC thickness ranged from 6 to 10 nm. Thermal stability of CNC was lower than that of initial celluloses and decreasing in the following sequence: cotton > softwood > hardwood > linen cellulose.

KW - Catalytic solvolysis of cellulose

KW - Cellulose nanocrystals

KW - Crystallinity

KW - Phosphotungstic acid

KW - Shape and size

KW - Thermostability

UR - http://www.scopus.com/inward/record.url?scp=85038353495&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/cellulose-nanocrystals-different-lengthtodiameter-ratios-extracted-various-plants-using-novel-system

U2 - 10.1007/s10570-017-1624-z

DO - 10.1007/s10570-017-1624-z

M3 - Article

AN - SCOPUS:85038353495

VL - 25

SP - 1031

EP - 1046

JO - Cellulose

JF - Cellulose

SN - 0969-0239

IS - 2

ER -