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

Wong, Sin Yeng (2001) Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper. Masters thesis, Universiti Pertanian Malaysia.

[img] PDF
637Kb

Abstract

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.

Item Type:Thesis (Masters)
Subject:Paper - Coatings - Sago
Chairman Supervisor:Dr. Paridah Md. Tahir
Call Number:FH 2001 4
Faculty or Institute:Faculty of Forestry
ID Code:10040
Deposited By: Mohd Nezeri Mohamad
Deposited On:02 Mar 2011 01:37
Last Modified:02 Mar 2011 01:38

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 02 Mar 2011 01:37.

View statistics for "Sago Starch and its Acrylamide Modified Products as Coating Material in Recycled Paper"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.