TY - JOUR

T1 - Disordering of the Crystal Structure of Cellulose Under Mechanical Activation

AU - Podgorbunskikh, E. M.

AU - Bychkov, A. L.

AU - Bulina, N. V.

AU - Lomovskii, O. I.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The present paper describes the study of the effect of mechanochemical activation on the amorphization process of individual α-cellulose and native cellulose being a constituent part of the lignocellulosic material in the form of partially crystalline fibrils. In processing the powder X-ray diffraction data the following methods are used to determine the degree of crystallinity of cellulose: Segal’s, Rietveld’s, and Lorentzian deconvolution. It is demonstrated that mechanical activation of individual α-cellulose in an AGO-2 laboratory planetary ball mill with a shock-shear action results only in grinding and amorphization, while the degree of amorphization increases propotionally to the duration of the power supply. When α-cellulose is treated in an RM-20 flow-through centrifugal roller mill with a shear action, particle agglomeration is observed together with amorphization. When a lignocellulosic material (wheat straw) is treated in a centrifugal roller mill, considerable amorphization occurs only at high energies, and no particle agglomeration is observed.

AB - The present paper describes the study of the effect of mechanochemical activation on the amorphization process of individual α-cellulose and native cellulose being a constituent part of the lignocellulosic material in the form of partially crystalline fibrils. In processing the powder X-ray diffraction data the following methods are used to determine the degree of crystallinity of cellulose: Segal’s, Rietveld’s, and Lorentzian deconvolution. It is demonstrated that mechanical activation of individual α-cellulose in an AGO-2 laboratory planetary ball mill with a shock-shear action results only in grinding and amorphization, while the degree of amorphization increases propotionally to the duration of the power supply. When α-cellulose is treated in an RM-20 flow-through centrifugal roller mill with a shear action, particle agglomeration is observed together with amorphization. When a lignocellulosic material (wheat straw) is treated in a centrifugal roller mill, considerable amorphization occurs only at high energies, and no particle agglomeration is observed.

KW - cellulose amorphization

KW - degree of crystallinity

KW - mechanical activation

KW - structure disordering

KW - ACID

KW - PRETREATMENT

KW - NEUTRON FIBER DIFFRACTION

KW - ENZYMATIC-HYDROLYSIS

KW - MILL

KW - HYDROGEN-BONDING SYSTEM

KW - WHEAT-STRAW

KW - SYNCHROTRON X-RAY

UR - http://www.scopus.com/inward/record.url?scp=85044104461&partnerID=8YFLogxK

U2 - 10.1134/S0022476618010328

DO - 10.1134/S0022476618010328

M3 - Article

AN - SCOPUS:85044104461

VL - 59

SP - 201

EP - 208

JO - Journal of Structural Chemistry

JF - Journal of Structural Chemistry

SN - 0022-4766

IS - 1

ER -