The Effects of Short Wave UV Irradiation (254-366nm) on Color Values of Recycled and Bleached ONP/OMP Pulps
Abstract
ABSTRACT As it is known, mechanical pulp papers include significant amount of lignin and carbohydrates as well as cellulose. Thus, when these lignin reach papers irradiated with short wave UV light they could not protect their color. In this study, bleaching of ONP/OMG recycled pulps with hydrogen peroxide, sodium percarbonate, sodium dithyonite, sodium borohydride and formamidin sulfunic acid were performed. Then the test papers of these pulps were irradiated with 254-366nm UV light and changes in the ISO Brightness, CIE L*a*b*, yellowness (YI) and whiteness (WI) values were observed. At the result of study, all bleaching agents were determined as insufficient in the respect of color stability. But if they compared with each other, the two stages sodium percarbonate-sodium borohydride bleaching sequence was gave the best results against to color reversion. Keywords: Old news/old magazine papers (ONP/OMG), Bleaching, Color Stability, UV Irradiation
Keywords
References
- Abadie-Muamert, F.A. ve Loras V., 1977. Comparison of the reduction of brightness and the modification of the colour of mechanical pulps during accelerated induced aging and natural aging. Revue A.T.I.P 31,9,334
- Deneault, C., Leduc, CL., 1995, Bleaching Efficiency of Formamidin Sulfinic Acid (FAS) in Comparision to Hydrosulfite, Borohydride, and Peroxide in One and Two Stages, Tappi Journal, Vol. 78, No. 7 p153-160
- Leduc, C., Garceau, M., Deneault, C., Robert, S., 2002, Bleaching of a Mechanical Pulp with Sodium Percarbonate and Amineborane – Bleaching Response and Brightness Stability, Journal of Pulp and Paper Science, Vol.28, No.5, p171-175
- Lee, C.L., J.V. Hatton, R.M. Berry, H.L. Hu ve D.C. Frost, 1993 An X-ray Photoelectron Study of the Reaction of Metal Ions with Borohyride Under Reductive Bleaching Conditions Tappi Journal
- Lindholm C.A., 1999. Bleaching in Mechanical Pulping Edit Sundholm J. Fapet Oy Helsinki, Finland , 76, 2
- Loras, V., 1980. Bleaching in Pulp and Paper Chemistry and Chemical Technology third edit by James P. Casey, Willey Intersicience John Willey and Sons
- Pednault C. Pellerin C. ve Robert S., 1999. Amine Boranes as New Reductive Bleaching Chemicals on Softwood Pulp Single Stage and Multistage Process Tappi Journal
- Schmidt, J.A. ve Heitner, C., 1993, Use of UVVisible Diffuse Reflectance Spectroscopy for Chromophore Research on Wood Fibers: a review, Tappi Journal Vol. 76, No.2, p117-123 , 82,2,110-114
- Sjöström E., 1981. Wood Chemistry: Fundamentals and Application, Academic Pres San Diago, California Süss H.U., 2006. Pulp Bleahing, In:Handbook of Pulp edit by Sixta, H., Willey-VCH
Kısa Dalga Boylarında Uygulanan (254-366nm) UV Işınımının Geri Dönüştürülen ve Ağartılan Atık Gazete ve Magazin Kâğıdı Hamurlarının Renk Değerleri Üzerine Etkisi
Abstract
Gazete kağıdı gibi mekanik hamur bazlı kağıtlar selülozun yanı sıra önemli miktarda lignin ve karbonhidrat
ihtiva etmektedir. Bu sebeple ışık etkisiyle kolayca sararmakta dolayısı ile başlangıç rengini
koruyamamaktadır. Yapılan bu çalışmada hidrojen peroksit ve sodyum perkarbonat gibi peroksit türevleri ve
sodyum ditiyonit, sodyum borhidrür ve formamidin sülfünik asit gibi indirgeyici özellikteki reaktifler ile
ağartılan atık gazete-magazin kâğıdı hamurlarının, UV (254nm-366nm) ışınlarına maruz bırakılarak
yaşlandırılması ve uygulanan işlem süresinin ISO parlaklığı, L*a*b* renk değerleri, beyazlık (WI) ve sarılık (YI)
indeksi üzerindeki etkisi araştırılmıştır. Elde edilen sonuçlardan tüm ağartıcıların renk kararlılığını korumakta
yetersiz olduğu bununla birlikte sodyum borhidrür ile ağartılan hamurlar ile sodyum perkarbonat ve sodyum
borhidrürün ard arda kullanıldığı kademelerin bir nebzede olsa daha dirençli sonuçlar verdiği tespit
edilmiştir.
References
- Abadie-Muamert, F.A. ve Loras V., 1977. Comparison of the reduction of brightness and the modification of the colour of mechanical pulps during accelerated induced aging and natural aging. Revue A.T.I.P 31,9,334
- Deneault, C., Leduc, CL., 1995, Bleaching Efficiency of Formamidin Sulfinic Acid (FAS) in Comparision to Hydrosulfite, Borohydride, and Peroxide in One and Two Stages, Tappi Journal, Vol. 78, No. 7 p153-160
- Leduc, C., Garceau, M., Deneault, C., Robert, S., 2002, Bleaching of a Mechanical Pulp with Sodium Percarbonate and Amineborane – Bleaching Response and Brightness Stability, Journal of Pulp and Paper Science, Vol.28, No.5, p171-175
- Lee, C.L., J.V. Hatton, R.M. Berry, H.L. Hu ve D.C. Frost, 1993 An X-ray Photoelectron Study of the Reaction of Metal Ions with Borohyride Under Reductive Bleaching Conditions Tappi Journal
- Lindholm C.A., 1999. Bleaching in Mechanical Pulping Edit Sundholm J. Fapet Oy Helsinki, Finland , 76, 2
- Loras, V., 1980. Bleaching in Pulp and Paper Chemistry and Chemical Technology third edit by James P. Casey, Willey Intersicience John Willey and Sons
- Pednault C. Pellerin C. ve Robert S., 1999. Amine Boranes as New Reductive Bleaching Chemicals on Softwood Pulp Single Stage and Multistage Process Tappi Journal
- Schmidt, J.A. ve Heitner, C., 1993, Use of UVVisible Diffuse Reflectance Spectroscopy for Chromophore Research on Wood Fibers: a review, Tappi Journal Vol. 76, No.2, p117-123 , 82,2,110-114
- Sjöström E., 1981. Wood Chemistry: Fundamentals and Application, Academic Pres San Diago, California Süss H.U., 2006. Pulp Bleahing, In:Handbook of Pulp edit by Sixta, H., Willey-VCH
Details
| Primary Language | English |
|---|---|
| Journal Section | Research Article |
| Authors | |
| Publication Date | April 29, 2011 |
| Published in Issue | Year 2011 Volume: 12 Issue: 1 |
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