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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
Synthesis of filtrate reducer from biogas residue and its application in drilling fluid, TAPPI Journal March 2020
ABSTRACT: Biogas residues (BR) containing cellulose and lignin are produced with the rapid development of biogas engineering. BR can be used to prepare the filtrate reducer of water-based drilling fluid in oilfields by chemical modification. BR from anaerobically fermenting grain stillage was alkalized and etherified by caustic soda and chloroacetic acid to prepare filtrate reducer, which was named as FBR. The long-chain crystalline polysaccharides were selected as dispersing agents (DA), and the water-soluble silicate was used as the cross-linking agent. After the hot rolling of FBR in saturated saltwater base mud for 16 h at 120°C, the filtration loss was increased from 7.20 mL/30 min before aging to 8.80 mL/30 min after aging. Compared with the commercial filtrate reducers, FBR had better tolerance to high temperature and salt, and lower cost.
Journal articles
Dynamic Modeling of Pressurized Peroxide Stages With Application to Full Bleach Plant Simulation, TAPPI JOURNAL, February 2007
Dynamic Modeling of Pressurized Peroxide Stages With Application to Full Bleach Plant Simulation, TAPPI JOURNAL, February 2007
Journal articles
Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007
Optimization of Rectangular Pulp Stock Mixing Chest Dimensions Using Dynamic Tests, TAPPI JOURNAL, February 2007
Journal articles
Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007
Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007
Journal articles
Color Gamut-A New Tool for the Pressroom?, TAPPI JOURNAL February 2009
Color Gamut-A New Tool for the Pressroom?, TAPPI JOURNAL February 2009
Journal articles
Retaining Surface Fibrillation of Wet-Beaten Wood Pulp in the Dry State, TAPPI JOURNAL July 2009
Retaining Surface Fibrillation of Wet-Beaten Wood Pulp in the Dry State, TAPPI JOURNAL July 2009
Journal articles
The Significance of Celocity in Black Liquor Spraying, TAPPI JOURNAL January 2009
The Significance of Celocity in Black Liquor Spraying, TAPPI JOURNAL January 2009
Journal articles
The influence of kaolin shape factor on the stiffness of coated papers, TAPPI JOURNAL June 2009
The influence of kaolin shape factor on the stiffness of coated papers, TAPPI JOURNAL June 2009
Journal articles
Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties, TAPPI JOURNAL June 2009
Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties, TAPPI JOURNAL June 2009