TY - JOUR
T1 - Chitin-glucan complex – Based biopolymeric structures using biocompatible ionic liquids
AU - Ferreira, Inês C.
AU - Araújo, Diana
AU - Voisin, Pierre
AU - Alves, Vítor D.
AU - Rosatella, Andreia A.
AU - Afonso, Carlos A. M.
AU - Freitas, Filomena
AU - Neves, Luísa A.
N1 - Associated Laboratory for Green Chemistry - LAQV, Applied Molecular Biosciences Unit - UCIBIO and Linking Landscape, Environment, Agriculture and Food research unit, which are financed by national funds from FCT/MCTES (UIDB/50006/2020, UIDB/04378/2020 and PEst-OE/AGR/UI0245/2020).
Funding from the projects PTDC/CTM-CTM/29869/2017 and UID/DTP/04138/2019 funded by FCT/MCTS are also acknowledged. Luisa A. Neves, Ines C. Ferreira and Diana Araujo acknowledge FCT/MCTES for financial support through FCT Investigator contract IF/00505/2014 and PhD fellowships SFRH/BD/137636/2018 and SFRH/BD/140829/2018.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - This work explores the novelty of dissolving chitin-glucan complex (CGC), from two fungal strains, Komagataella pastoris (CGCP) and Aspergillus niger (CGCKZ) (KiOnutrime-CG™), using biocompatible ionic liquids (ILs). Three cholinium-based ILs were tested, choline acetate, choline propionate and choline hexanoate. Although all tested ILs resulted in the dissolution of the co-polymer at a concentration of 5 % (w/w), distinct polymeric structures, films or gels, were obtained from CGCP and CGCKZ, respectively. CGCP films were dense, flexible and elastic, with high swelling capacity (> 200 %). The IL anion alkyl chain length influenced the polymeric structures’ properties, namely, the CGCP films elongation at break and swelling degree. CGCKZ resulted in weak gels. For both polymeric structures, exposure to the ILs under the dissolution conditions caused significant changes in the co-polymers’ chemical structure, namely, reduction of their glucan moiety and reduction of the degree of acetylation, thus yielding chitosan-glucan complexes (ChGC) enriched in glucosamine (53.4 ± 0.3–60.8 ± 0.3 %).
AB - This work explores the novelty of dissolving chitin-glucan complex (CGC), from two fungal strains, Komagataella pastoris (CGCP) and Aspergillus niger (CGCKZ) (KiOnutrime-CG™), using biocompatible ionic liquids (ILs). Three cholinium-based ILs were tested, choline acetate, choline propionate and choline hexanoate. Although all tested ILs resulted in the dissolution of the co-polymer at a concentration of 5 % (w/w), distinct polymeric structures, films or gels, were obtained from CGCP and CGCKZ, respectively. CGCP films were dense, flexible and elastic, with high swelling capacity (> 200 %). The IL anion alkyl chain length influenced the polymeric structures’ properties, namely, the CGCP films elongation at break and swelling degree. CGCKZ resulted in weak gels. For both polymeric structures, exposure to the ILs under the dissolution conditions caused significant changes in the co-polymers’ chemical structure, namely, reduction of their glucan moiety and reduction of the degree of acetylation, thus yielding chitosan-glucan complexes (ChGC) enriched in glucosamine (53.4 ± 0.3–60.8 ± 0.3 %).
KW - Biopolymers
KW - Chitin-glucan complex (CGC)
KW - Films
KW - Gels
KW - Ionic liquids (ILs)
UR - http://www.scopus.com/inward/record.url?scp=85087588679&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2020.116679
DO - 10.1016/j.carbpol.2020.116679
M3 - Article
C2 - 32829807
AN - SCOPUS:85087588679
SN - 0144-8617
VL - 247
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
M1 - 116679
ER -