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The Influence of Chemical and Mechanical Flocculation on Paper Formation as Assessed by the Grammage Probability Distribution

Jing, Yan
http://rave.ohiolink.edu/etdc/view?acc_num=miami1249537658

Abstract Details

2009, Master of Science, Miami University, Paper Science and Engineering.
This investigation was designed to test the influence of the mechanical and chemical variables of papermaking to the resulting paper formation based on statistical and transmission radiography methods. Results were analyzed by using the formation number and grammage probability distribution. Increasing the degree of refining caused fiber fibrillation and shortened fiber length without changing diameter or coarseness. This made the distribution of fibers in the suspension and resulting handsheets more uniform as described by the crowding factor. The excessive concentration of C-PAM retention aids and the addition of A-PAM formation aids can all benefit the uniformity of the paper as determined by the STFI formation number which was attributed to the electrostatic repulsion of the fibers. On the other hand, an acidic environment or the C-PAM dosage below 0.5% deteriorate paper formation due to van de Waals forces and charge neutralization. Furthermore, the asymmetry of the grammage distribution was explained as the sum of different normal distributions with different mean values. The larger standard deviation of the original histogram and the shift of the mean between the original distribution and the first residual frequency histogram can intensify the extent of asymmetry which results in a larger skewness of the grammage probability distribution.
Steven Keller, D. (Advisor)
Douglas Coffin, W. (Committee Member)
Shashi Lalvani (Committee Member)
97 p.
Chemical Engineering
GRAMMAGE; FLOCCULATION; fiber; handsheets; PAPER FORMATION; C-PAM; retention aids

Recommended Citations

Citations

  • Jing, Y. (2009). The Influence of Chemical and Mechanical Flocculation on Paper Formation as Assessed by the Grammage Probability Distribution [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1249537658

    APA Style (7th edition)

  • Jing, Yan. The Influence of Chemical and Mechanical Flocculation on Paper Formation as Assessed by the Grammage Probability Distribution. 2009. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1249537658.

    MLA Style (8th edition)

  • Jing, Yan. "The Influence of Chemical and Mechanical Flocculation on Paper Formation as Assessed by the Grammage Probability Distribution." Master's thesis, Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1249537658

    Chicago Manual of Style (17th edition)

miami1249537658
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© 2009, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.