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Youngâ??s Modulus of Cellulose Fibrils Measured Using Atomic Force MicroscopyYoungâ??s Modulus of Cellulose Fibrils Measured Using Atomic Force Microscopy
Young’s Modulus of Cellulose Fibrils Measured Using Atomic Force MicroscopyYoung’s Modulus of Cellulose Fibrils Measured Using Atomic Force Microscopy
Electrical and Photoelectrical Properties of Polyaniline Modified Poly (vinylidenefluoride) Latex Films, 2008 International Conference on Nanotechnology for the Forest Product Industry
Electrical and Photoelectrical Properties of Polyaniline Modified Poly (vinylidenefluoride) Latex Films, 2008 International Conference on Nanotechnology for the Forest Product Industry
From Nano to Paper Machine Scale, 2008 International Conference on Nanotechnology for the Forest Product Industry
From Nano to Paper Machine Scale, 2008 International Conference on Nanotechnology for the Forest Product Industry
Journal articles
Magazine articles
Paper coated with sonochemically synthesized zinc oxide nanoparticles: Enhancement of properties for preservation of documents, TAPPI JOURNAL January 2017
Paper coated with sonochemically synthesized zinc oxide nanoparticles: Enhancement of properties for preservation of documents, TAPPI JOURNAL January 2017
Nanotechnology & Forestry: Applications, Implications, Research Needs & Risk Assessment, 2009 International Conference on Nanotechnology for the Forest Products Industry
Nanotechnology & Forestry: Applications, Implications, Research Needs & Risk Assessment, 2009 International Conference on Nanotechnology for the Forest Products Industry
Journal articles
Magazine articles
Investigation on the recycling of sulfuric acid from pretreatment of cellulose for nanocellulose preparation, TAPPI JOURNAL February 2020
ABSTRACT: Sulfuric acid is often used to pretreat cellulose prior to homogenization and conversion to nanocellulose. It would be economically significant to reuse the acid to close the overall value chain loop. The target of this work was to investigate the effect of recovery and recycling frequency of sulfuric acid from the pretreatments on the pretreatment yield of water-insoluble cellulose solid residue, and to explore the relationship between the nanocellulose size prepared by recovery of acid and number of cycles. The surface properties of the nanocelluloses were measured, including content of sulfate groups, absolute zeta potential, crystallinity, and thermal stability.
Braiding Electrospun Nanofibers for Tendon/Ligament Tissue Engineering, 2011 Innovative Nonwovens Conference
Braiding Electrospun Nanofibers for Tendon/Ligament Tissue Engineering, 2011 Innovative Nonwovens Conference
Journal articles
Magazine articles
Understanding extensibility of paper: Role of fiber elongation and fiber bonding, TAPPI Journal March 2020
ABSTRACT: The tensile tests of individual bleached softwood kraft pulp fibers and sheets, as well as the micro-mechanical simulation of the fiber network, suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of the sheet. The stress-strain curves of two actual individual pulp fibers and one mimicked classic stress-strain behavior of fiber were applied to a micromechanical simulation of random fiber networks. Both the experimental results and the micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of the stress-strain curve of individual pulp fibers may have a significant influence on the shape of the stress-strain curve of a paper sheet. A large increase in elongation and strength of paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental handsheets containing starch and cellulose microfibrils and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not influence the shape of the stress-strain curve of the fiber network until the bonds fail, whereas the number of bonds has an influence on the activation of the fiber network and on the shape of the whole stress-strain curve.
Journal articles
Magazine articles
Rice straw-based sustainable food packaging material with improved strength and barrier properties: Development and characterization, TAPPI Journal October 2023
ABSTRACT: Sustainable food packaging paper with high barrier and strength properties was developed with rice straw nanocellulose materials. Pulping and bleaching of rice straw were performed using an organosolv pulping and DED (D: chlorine dioxide bleaching; E: sodium hydroxide extraction) bleaching sequence. Bleached rice straw pulp was refined to 90°SR using a laboratory Valley beater. The laboratory handsheets were prepared using pulp slurry at 40°SR and 90°SR. The handsheets of cellulose nanofibrils (CNFs) made of highly refined pulp (90°SR) were surface sized using alkyl ketene dimer (AKD) wax to increase the barrier properties of paper for selective food packaging applications. The paper samples were tested for mechanical, optical, surface, and barrier properties, including tensile index, burst index, tearing index, bending stiffness, elongation, porosity, apparent density, opacity, Cobb value, water vapor transmission rate (WVTR), oil and grease resistance, and contact angle. The refined pulp (90°SR) was analyzed using field-emission scanning electron microscopy (FE-SEM), and it was observed that the morphology of the developed fibers changes to the nanoscale (<100 nm) for at least one dimension. The particle size distribution of the refined pulp using DLS analyzer also confirmed the cellulose fibers to near nanoscale. It was concluded that nanofibers were formed by a high degree of the mechanical pulp refining process and found to be much more economical than alternative processes in this direction. The sample handsheets of CNFs showed good strength and barrier properties. The barrier properties further increased when surface sizing was done using low-cost, nontoxic, and biodegradable AKD wax.
Grafting of Benzyl Penicillin on Microfibrillated cellulose: Water based method, 2014 TAPPI International Conference on Naonotechnology for Renewable Materials
Grafting of Benzyl Penicillin on Microfibrillated cellulose: Water based method, 2014 TAPPI International Conference on Nanotechnology for Renewable Materials