Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Disk-like nanocrystals prepared by solvolysis from regenerated cellulose and colloid properties of their hydrosols. / Torlopov, Mikhail A.; Martakov, Ilia S.; Mikhaylov, Vasily I.; Krivoshapkin, Pavel V.; Tsvetkov, Nikolay V.; Sitnikov, Petr; Udoratina, Elena V.
в: Carbohydrate Polymers, Том 200, 15.11.2018, стр. 162-172.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Disk-like nanocrystals prepared by solvolysis from regenerated cellulose and colloid properties of their hydrosols
AU - Torlopov, Mikhail A.
AU - Martakov, Ilia S.
AU - Mikhaylov, Vasily I.
AU - Krivoshapkin, Pavel V.
AU - Tsvetkov, Nikolay V.
AU - Sitnikov, Petr
AU - Udoratina, Elena V.
PY - 2018/11/15
Y1 - 2018/11/15
N2 - One possible way of obtaining cellulose nanocrystals and aqueous sols with novel properties is based on modification of supramolecular structure of the polysaccharide. This modification involves rearrangements of hydrogen bonds and has an effect on polymer morphology, formation of surface reactive sites and interface interactions. Disc-like nanocrystals of cellulose II were prepared by solvolysis of regenerated cellulose in acetic acid/octanol medium in the presence of 0.4 mol% of phosphotungstic acid. The starting cellulose samples were dissolved and regenerated in the NaOH/thiourea system. Cellulose nanocrystals were studied by transmission electron microscopy, atomic force microscopy, dynamic light scattering, FTIR spectroscopy, XRD and thermogravimetric analysis. Colloidal stability of aqueous suspensions of cellulose nanocrystals in the presence of electrolyte (KCl) was studied. Their acid-base properties were revealed using potentiometric titration. The influence of electrolyte concentration on dynamic viscosity of the obtained hydrosols and their ability to show birefringence was established.
AB - One possible way of obtaining cellulose nanocrystals and aqueous sols with novel properties is based on modification of supramolecular structure of the polysaccharide. This modification involves rearrangements of hydrogen bonds and has an effect on polymer morphology, formation of surface reactive sites and interface interactions. Disc-like nanocrystals of cellulose II were prepared by solvolysis of regenerated cellulose in acetic acid/octanol medium in the presence of 0.4 mol% of phosphotungstic acid. The starting cellulose samples were dissolved and regenerated in the NaOH/thiourea system. Cellulose nanocrystals were studied by transmission electron microscopy, atomic force microscopy, dynamic light scattering, FTIR spectroscopy, XRD and thermogravimetric analysis. Colloidal stability of aqueous suspensions of cellulose nanocrystals in the presence of electrolyte (KCl) was studied. Their acid-base properties were revealed using potentiometric titration. The influence of electrolyte concentration on dynamic viscosity of the obtained hydrosols and their ability to show birefringence was established.
KW - Cellulose nanocrystals
KW - Colloid-chemical properties
KW - Colloidal stability
KW - Heteropolyacids
KW - pK spectra
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=85050938021&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2018.08.002
DO - 10.1016/j.carbpol.2018.08.002
M3 - Article
AN - SCOPUS:85050938021
VL - 200
SP - 162
EP - 172
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
SN - 0144-8617
ER -
ID: 36419896