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Enzyme treated CNF biofilms: Characterization
- Source :
- International Journal of Biological Macromolecules. 117:713-720
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- WOS: 000442057700082 PubMed: 29859279 The objective of this study was to characterize on the chemical, mechanical, electrical and thermal properties of nanofibrillated cellulose based polyvinyl alcohol (PCNF) and silica (SiCNF) films obtained from Pulpzyme HC 2500 and Celluclast 1.5 L enzyme treated kraft-NaBH4 pulps. Morphological alterations were monitored with SEM. Thermal stability, chemical characterization and crystallization were determined using TGA and FT-IR. Young's and storage moduli of the films were determined via a universal testing machine and DTMA. Dielectric properties were evaluated using an impedance analyzer. In the PCNF films, new vibrations and chemical shifts were observed. The crystallinity values of the SiCNF films calculated from the FT-IR were in agreement with the TGA results, revealing that the lowest crystallinity value was in the SiCNF. The higher Young modulus and elongation at break value were obtained in the neat the CNF films while the lowest values were observed in the neat SiCNF films. However, the SiCNF films revealed higher thermo-mechanical property. The PCNF and SiCNF films exhibit more visible dielectric behavior than that of the neat CNF films. Higher thermal stability, thermo-mechanical and mechanical properties were determined in the Pulpzyme HC 2500 enzyme treated films. Hence, this study evidenced that the properties of CNF films having different matrix are influenced by both the enzymes employed. (C) 2018 Elsevier B.V. All rights reserved. TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [COST 1140022]; Istanbul University Research FundIstanbul University [4806, 19515] The authors thank TUBITAK (Project Number: COST 1140022) for support in this research. The authors also thank Istanbul University Research Fund for its financial support in this study (Project Number: 4806 and Project Number: 19515).
- Subjects :
- Materials science
Nanofibers
Young's modulus
02 engineering and technology
Dielectric
010402 general chemistry
01 natural sciences
Biochemistry
Polyvinyl alcohol
law.invention
chemistry.chemical_compound
Crystallinity
symbols.namesake
Cellulase
Structural Biology
law
Elastic Modulus
Thermal stability
Crystallization
Cellulose
Molecular Biology
Chemical properties
Endo-1,4-beta Xylanases
Enzyme effect
Thermo-mechanical properties
General Medicine
Silicon Dioxide
021001 nanoscience & nanotechnology
0104 chemical sciences
Chemical engineering
chemistry
Polyvinyl Alcohol
Nanofilms
symbols
Elongation
0210 nano-technology
Subjects
Details
- ISSN :
- 01418130
- Volume :
- 117
- Database :
- OpenAIRE
- Journal :
- International Journal of Biological Macromolecules
- Accession number :
- edsair.doi.dedup.....48f068e682ebbebe247b1b4424378ea8