Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper

Starches are usually used in recycled paper to improve the paper strength properties. Apart from the common starches available in the market, sago starch offers another alternative since it is cheaper. This study was carried out to determine the suitability of sago starch as paper additive. The b...

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主要作者: Wong, Sin Yeng
格式: Thesis
语言:English
English
出版: 2001
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spelling my-upm-ir.100402024-03-11T04:21:28Z Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper 2001 Wong, Sin Yeng Starches are usually used in recycled paper to improve the paper strength properties. Apart from the common starches available in the market, sago starch offers another alternative since it is cheaper. This study was carried out to determine the suitability of sago starch as paper additive. The basic properties i.e., pH, viscosity and solid content, of the unmodified (4%, 5% and 6% w/v basis) and modified sago starch [sago starch blended with acrylamide (38.5% grafting efficiency), sago starch grafted with acrylamide in an acidic condition and sago starch grafted with acrylamide in an alkaline condition] were determined. The starches were then used to coat laboratory made recycled papers. Various effects were studied, namely, starch concentrations, methods of sago starch modification, addition of different types of initiator and further curing at different temperatures. Increasing the concentration of the unmodified sago starch solutions from 4% to 6% caused significant reduction in their pH values and increased both the viscosity and solid content of the solutions. The unmodified sago starch solution was very viscous (>447 mPa.s) and were susceptible to biological attack after two days at ambient. The incorporation of acrylamide into sago starch through blending or grafting significantly reduced the viscosity of the solutions. All the modified starches remained biologically resistant even after 14 days of exposure to ambient. Paper - Coatings - Sago 2001 Thesis http://psasir.upm.edu.my/id/eprint/10040/ http://psasir.upm.edu.my/id/eprint/10040/1/FH_2001_4_.pdf text en public masters Universiti Putra Malaysia Paper - Coatings - Sago Faculty of Forestry Md. Tahir, Paridah English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
advisor Md. Tahir, Paridah
topic Paper - Coatings - Sago


spellingShingle Paper - Coatings - Sago


Wong, Sin Yeng
Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
description Starches are usually used in recycled paper to improve the paper strength properties. Apart from the common starches available in the market, sago starch offers another alternative since it is cheaper. This study was carried out to determine the suitability of sago starch as paper additive. The basic properties i.e., pH, viscosity and solid content, of the unmodified (4%, 5% and 6% w/v basis) and modified sago starch [sago starch blended with acrylamide (38.5% grafting efficiency), sago starch grafted with acrylamide in an acidic condition and sago starch grafted with acrylamide in an alkaline condition] were determined. The starches were then used to coat laboratory made recycled papers. Various effects were studied, namely, starch concentrations, methods of sago starch modification, addition of different types of initiator and further curing at different temperatures. Increasing the concentration of the unmodified sago starch solutions from 4% to 6% caused significant reduction in their pH values and increased both the viscosity and solid content of the solutions. The unmodified sago starch solution was very viscous (>447 mPa.s) and were susceptible to biological attack after two days at ambient. The incorporation of acrylamide into sago starch through blending or grafting significantly reduced the viscosity of the solutions. All the modified starches remained biologically resistant even after 14 days of exposure to ambient.
format Thesis
qualification_level Master's degree
author Wong, Sin Yeng
author_facet Wong, Sin Yeng
author_sort Wong, Sin Yeng
title Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
title_short Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
title_full Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
title_fullStr Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
title_full_unstemmed Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper
title_sort sago starch and its acrylamide modified products as coating material in recycled paper
granting_institution Universiti Putra Malaysia
granting_department Faculty of Forestry
publishDate 2001
url http://psasir.upm.edu.my/id/eprint/10040/1/FH_2001_4_.pdf
_version_ 1794018861288259584