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Journal articles
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Open Access
Wheat straw as an alternative pulp fiber, TAPPI Journal January 2020

Author: Peter W. Hart | ABSTRACT: The desire to market sustainable packaging materials has led to an interest in the use of various fiber types as a raw material. It has been suggested that the use of annual crops for partial replacement of wood fiber would result in more sustainable products. Several life cycle analyses (LCA) have been performed to evaluate these claims. These LCAs provided conflicting and contradictory results because of the local conditions and the specific pulping processes investigated. Selected LCAs are reviewed and the underlying reasons for these conflicting results are analyzed.

Journal articles
Magazine articles
Open Access
Editorial: TAPPI Journal 2019 Best Research Paper addresses hard scale formation in green liquor pipelines, TAPPI Journal March 2020

ABSTRACT: TAPPI and the TAPPI Journal (TJ) Editorial Board would like congratulate the authors of the 2019 TAPPI Journal Best Research Paper Award: Alisha Giglio, Vladimiros Papangelakis, and Honghi Tran. Their paper, “The solubility of calcium carbonate in green liquor handling systems,” appeared on p. 595 of the October 2019 issue. This kraft recovery cycle research was recognized by the TJ Editorial Board for its innovation, creativity, scientific merit, and clear expression of ideas.

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
Open Access
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
Open Access
Upgrading wood chips: the Paprifer process, TAPPI JOURNAL March 1988

Upgrading wood chips: the Paprifer process, TAPPI JOURNAL March 1988

Journal articles
Open Access
Optimization of a swirl burner for pulverized-wood fuels, TAPPI JOURNAL May 1988 88MAY91

Optimization of a swirl burner for pulverized-wood fuels, TAPPI JOURNAL May 1988

Journal articles
Open Access
On-line layer discrimination of multilayer materials, TAPPI JOURNAL May 1988 88MAY97

On-line layer discrimination of multilayer materials, TAPPI JOURNAL May 1988

Journal articles
Open Access
Knowledge transfer from academia, TAPPI JOURNAL October 1988 88OCT47

Knowledge transfer from academia, TAPPI JOURNAL October 1988

Journal articles
Open Access
Kraft mill bleach plant effluents: recent developments aimed at decreasing their environmental impact, part 1, TAPPI JOURNAL October 19888 8OCT51

Kraft mill bleach plant effluents: recent developments aimed at decreasing their environmental impact, part 1, TAPPI JOURNAL October 1988

Journal articles
Open Access
Paper Sludge land application studies for three Wisconsin mills, September 1988, TAPPI Journal 88SEP101

Paper sludge land application studies for three Wisconsin mills, TAPPI JOURNAL September 1988

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