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http://dx.doi.org/10.7584/ktappi.2015.47.3.034

Development of Quantitative Analysis of the Fluorescent Whitening Agents Used for Surface Treatments  

Lee, Ji Young (Dept. of Environmental Materials Science/IALS, Gyeongsang National University)
Kim, Chul Hwan (Dept. of Environmental Materials Science/IALS, Gyeongsang National University)
Park, Jong Hye (Dept. of Forest Products, Gyeongsang National University)
Kim, Eun Hea (Dept. of Forest Products, Gyeongsang National University)
Wi, Sang Wook (Dept. of Forest Products, Gyeongsang National University)
Sung, Yong Joo (Dept. of Biobased Materials, College of Agriculture and Life Science, Chungnam Natl. Univ.)
Heo, Young Jun (KLEANNARA Corp.)
Kim, Yeon Oh (KLEANNARA Corp.)
Hwang, In Young (KLEANNARA Corp.)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.47, no.3, 2015 , pp. 34-39 More about this Journal
Abstract
Fluorescent whitening agents (FWAs) are widely applied in the papermaking process to improve the CIE whiteness and the ISO brightness of papers. Large amounts of FWAs are used in the paper and paperboard industry, but no standard method exists for quantitative FWA analysis. Therefore, a new method is needed to analyze the presence of FWAs in paper and paperboard to control their additions and applications. In particular, FWA analysis must concentrate on those used for surface treatment of paper because their use in surface applications has increased recently. The purposes of this study were to measure the optical properties of papers surface-treated with oxidized starch containing FWAs and to deduce the regression equations for the quantitative analysis of FWAs used for surface treatments. Surface sizing was carried out to treat the surface of a base paper with T-FWA and H-FWA, and the pickup weight of the surface sized paper was measured to determine the real weight of FWAs transferred onto the paper surface. After surface sizing and preconditioning, the paper was evaluated for CIE whiteness, ISO brightness, fluorescence index, and reflectance at 440 nm using an Elrepho spectrophotometer. The CIE whiteness and the ISO brightness increased linearly as FWA content increased. The fluorescence index and the reflectance showed linear relationships with T-FWA and H-FWA. Linear regression equations were determined for the quantitative analysis of FWAs used for surface treatments.
Keywords
Fluorescent whitening agent; surface treatment; quantitative analysis; fluorescence index; reflectance;
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Times Cited By KSCI : 1  (Citation Analysis)
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