TY - JOUR

T1 - Plasticizing of chitosan films with deep eutectic mixture of malonic acid and choline chloride

AU - Sokolova, Maria P.

AU - Smirnov, Michael A.

AU - Samarov, Artemiy A.

AU - Bobrova, Natalya V.

AU - Vorobiov, Vitaly K.

AU - Popova, Elena N.

AU - Filippova, Elizaveta

AU - Geydt, Pavel

AU - Lahderanta, Erkki

AU - Toikka, Alexander M.

N1 - Funding Information: This work was supported by the Russian Foundation for Basic Research (RFBR) , grant 18-08-01392A . Artemiy A. Samarov is grateful to the RFBR for financial support (research project No. 16-33-60128 mol_а_dk). The experimental work was facilitated by the equipment of the Magnetic Resonance Research Centre, Center for Optical and Laser materials research, Centre for Innovative Technologies of Composite Materials and Nanotechnology Interdisciplinary Resource Centre at St. Petersburg State University. Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Chitosan (CS) films containing deep eutectic solvent (DES) based on malonic acid (MA) and choline chloride (ChCl) were successfully prepared by solution casting method by using DES content ranging from 0 to 82 wt%. A strong interaction of CS with the components of DES was demonstrated by analyses of water sorption isotherms, atomic force microscopy and FTIR results. The plasticizing effect of the MA and ChCl mixture on the CS matrix was shown by static bulk mechanical measurements, thermal analysis and quantitative nanomechanical mapping (QNM). Elongation at break increased from 3 to 62% at increase of DES content from 0 to 67 wt%, while further increase of DES content led to the decreasing of maximal elongation. Introduction of DES into CS films led to the appearance of glass transition temperature in the region +2 - -2.3 °C. QNM results indicated homogeneity of the films containing up to 75 wt% of DES.

AB - Chitosan (CS) films containing deep eutectic solvent (DES) based on malonic acid (MA) and choline chloride (ChCl) were successfully prepared by solution casting method by using DES content ranging from 0 to 82 wt%. A strong interaction of CS with the components of DES was demonstrated by analyses of water sorption isotherms, atomic force microscopy and FTIR results. The plasticizing effect of the MA and ChCl mixture on the CS matrix was shown by static bulk mechanical measurements, thermal analysis and quantitative nanomechanical mapping (QNM). Elongation at break increased from 3 to 62% at increase of DES content from 0 to 67 wt%, while further increase of DES content led to the decreasing of maximal elongation. Introduction of DES into CS films led to the appearance of glass transition temperature in the region +2 - -2.3 °C. QNM results indicated homogeneity of the films containing up to 75 wt% of DES.

KW - Chitosan

KW - Deep eutectic solvents

KW - Plasticizing of polymers

KW - Polymer structure

KW - Water sorption

UR - http://www.scopus.com/inward/record.url?scp=85048447504&partnerID=8YFLogxK

U2 - 10.1016/j.carbpol.2018.06.037

DO - 10.1016/j.carbpol.2018.06.037

M3 - Article

C2 - 30007646

AN - SCOPUS:85048447504

VL - 197

SP - 548

EP - 557

JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

SN - 0144-8617

ER -