Strengthening Cellulose Nanopaper via Deep Eutectic Solvent and Ultrasound-Induced Surface Disordering of Nanofibers

Autor(es)

Batishcheva, Elizaveta V. ^{[1, 2]} ; Sokolova, Darya N. ^{[1, 2]} ; Fedotova, Veronika S. ^[1] ; Sokolova, Maria P. ^[1] ; Nikolaeva, Alexandra L. ^[1] ; Vakulyuk, Alexey Y. ^[1] ; Shakhbazova, Christina Y. ^{[1, 2]} ; Ribeiro, Mauro Carlos Costa ^[3] ; Karttunen, Mikko ^{[1, 4, 5, 6]} ; Smirnov, Michael A. ^[1]

Afiliação do(s) autor(es)

^[1] Russian Acad Sci, Inst Macromol Cpds, VO Bolshoi Pr 31, St Petersburg 199004 - Russia

^[2] St Petersburg State Univ, Inst Chem, Univ Pr 26, Peterhof, St Petersburg 198504 - Russia

^[3] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil

^[4] Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7 - Canada

^[5] Univ Western Ontario, Dept Phys & Astron, 1151 Richmond St, London, ON N6A 5B7 - England

^[6] Univ Western Ontario, Ctr Adv Mat & Biomat Res, 1151 Richmond St, London, ON N6A 5B7 - Canada

• Tipo de documento: Artigo Científico
• Fonte: POLYMERS; v. 14, n. 1 JAN 2022.
• Citações Web of Science: 0

Resumo

The route for the preparation of cellulose nanofiber dispersions from bacterial cellulose using ethylene glycol- or glycerol-based deep eutectic solvents (DES) is demonstrated. Choline chloride was used as a hydrogen bond acceptor and the effect of the combined influence of DES treatment and ultrasound on the thermal and mechanical properties of bacterial cellulose nanofibers (BC-NFs) is demonstrated. It was found that the maximal Young's modulus (9.2 GPa) is achieved for samples prepared using a combination of ethylene glycol-based DES and ultrasound treatment. Samples prepared with glycerol-based DES combined with ultrasound exhibit the maximal strength (132 MPa). Results on the mechanical properties are discussed based on the structural investigations that were performed using FTIR, Raman, WAXD, SEM and AFM measurements, as well as the determination of the degree of polymerization and the density of BC-NF packing during drying with the formation of paper. We propose that the disordering of the BC-NF surface structure along with the preservation of high crystallinity bulk are the key factors leading to the improved mechanical and thermal characteristics of prepared BC-NF-based papers. (AU)

• Processo FAPESP: 16/21070-5 - Espectroscopia vibracional com resolução espacial
• Beneficiário: Mauro Carlos Costa Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Temático