Journal ArticleDOI
Nanocellulose reinforced PVA composite films: Effects of acid treatment and filler loading
Sun-Young Lee,D. Jagan Mohan,In-Aeh Kang,Geum-Hyun Doh,Soo won Lee,Soo won Lee,Seong Ok Han,Seong Ok Han +7 more
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TLDR
In this article, nanocellulose reinforced polyvinyl alcohol (PVA) composite films were prepared by the reinforcement of nanocells into a PVA matrix at different filler loading levels and subsequent film casting.Abstract:
Nanocellulose was prepared by acid hydrolysis of microcrystalline cellulose (MCC) at different hydrobromic acid (HBr) concentrations. Polyvinyl alcohol (PVA) composite films were prepared by the reinforcement of nanocellulose into a PVA matrix at different filler loading levels and subsequent film casting. Chemical characterization of nanocelluloses was performed for the analysis of crystallinity (Xc), degree of polymerization (DP), and molecular weight (Mw). The mechanical and thermal properties of the nanocellulose reinforced PVA films were also measured for tensile strength and thermogravimetric analysis (TGA). The acid hydrolysis decreased steadily the DP and Mw of MCC. The crystallinity of MCC with 1.5 M and 2.5 M HBr showed a significant increase due to the degradation of amorphous domains in cellulose. Higher crystalline cellulose showed the higher thermal stability than MCC. From X-ray diffraction (XRD) analysis, nanocellulose samples showed the higher peak intensity than MCC cases. Reduction of MCC particle by acid hydrolysis was clearly observed from scanning electron microscope (SEM) images. The tensile and thermal properties of PVA composite films were significantly improved with the increase of the nanocellulose loading.read more
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Nanocellulose: a new ageless bionanomaterial
TL;DR: In this paper, the hierarchical structure of cellulose is exploited to extract nanoparticles from this naturally occurring polymer, which can be used for the processing of polymer nanocomposites.
Journal ArticleDOI
Nanocellulose, a Versatile Green Platform: From Biosources to Materials and Their Applications
Bejoy Thomas,Midhun C. Raj,Athira K. B,Rubiyah M. H,Jithin Joy,Jithin Joy,Audrey Moores,Glenna L. Drisko,Clément Sanchez +8 more
TL;DR: Nanocellulose has excellent strength, high Young's modulus, biocompatibility, and tunable self-assembly, thixotropic, and photonic properties, which are essential for the applications of this material.
Journal ArticleDOI
Different preparation methods and properties of nanostructured cellulose from various natural resources and residues: a review
Mehdi Jonoobi,Reza Oladi,Y. Davoudpour,Kristiina Oksman,Alain Dufresne,Yahya Hamzeh,Reza Davoodi +6 more
TL;DR: A comprehensive review of the literature regarding nanocellulose isolation and demonstrates the potential of cellulose nanomaterials for a wide range of high-tech applications is presented in this article.
Journal ArticleDOI
Nanocellulose properties and applications in colloids and interfaces
Carlos Salas,Tiina Nypelö,Carlos Rodríguez-Abreu,Carlos A. Carrillo,Orlando J. Rojas,Orlando J. Rojas +5 more
TL;DR: In this paper, the authors introduce recent advances in the development of cellulose nanomaterials and the construction of high order structures by applying some principles of colloid and interface science.
Journal ArticleDOI
All-Solid-State Flexible Supercapacitors Fabricated with Bacterial Nanocellulose Papers, Carbon Nanotubes, and Triblock-Copolymer Ion Gels
Yu Jin Kang,Sang Jin Chun,Sang Jin Chun,Sung Suk Lee,Bo Yeong Kim,Jung Hyeun Kim,Haegeun Chung,Sun Young Lee,Woong Kim +8 more
TL;DR: All-solid-state flexible supercapacitors are demonstrated with high physical flexibility, desirable electrochemical properties, and excellent mechanical integrity, which were realized by rationally exploiting unique properties of bacterial nanocellulose, carbon nanotubes, and ionic liquid based polymer gel electrolytes.
References
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An Empirical Method for Estimating the Degree of Crystallinity of Native Cellulose Using the X-Ray Diffractometer
TL;DR: In this paper, an empirical method for determining the crystallinity of native cellulose was studied with an x-ray diffractometer using the focusing and transmission techniques, and the influence of fluctuations in the primary radiation and in counting and recording processes have been determined.
Journal ArticleDOI
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Dietrich Fengel,Gerd Wegener +1 more
TL;DR: The anatomy and chemistry of wood are described in detail, and with extensive reference to the literature, under the following headings: Introduction; Structure and ultrastructure; Chemical composition and analysis of wood; Cellulose; Polyoses (hemicelluloses); Lignin; Extractives; Distribution of the components within the wood cell wall; Constituents of bark; Reactions in acidic medium; reactions in alkaline medium; Influence of temperature; Degradation by light and ionizing rays; Microbial and enzymatic degradation; Aging and fossilization; Pul
Journal ArticleDOI
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Ayse Alemdar,Mohini Sain +1 more
TL;DR: After mechanical treatments of cryocrushing, disintegration and defibrillation, the thermal properties of the nanofibers were studied by the TGA technique and found to increase dramatically and is reasonably promising for the use of these nanofiber types in reinforced-polymer manufacturing.