Gel-particles for ink-jet paper coating applications

Kriel, Carmen Cornelia (2004-12)

Thesis (MSc)--Stellenbosch University, 2004.

Thesis

ENGLISH ABSTRACT: An unsaturated, linear, aliphatic polyamide was synthesized from 1,6-hexanediamine and fumaric acid by means of a phosphorylation polycondensation reaction, and successfully crosslinked with a vinyl monomer during an inverse suspension polymerization reaction. The two vinyl monomers that were used were 2-hydroxyethyl methacrylate (HEMA) and 4-vinyl pyridine. The linear polyamide was characterized by means of nuclear magnetic resonance (NMR) and electrospray mass spectrometry (ESMS), while the crosslinked product was characterized by light scattering and scanning electron microscopy (SEM), as well as cryo-SEM. The average particle diameters of the crosslinked product were found to be in the range of 100 to 300 nm. One of the synthesized crosslinked products was used in coating formulations on starchcoated paper. The paper samples were evaluated and compared on the basis of printing quality, colour density and colour uniformity of a printed image, as well as the wet-rub resistance of the coating. A formulation containing 0,1% of the HEMA crosslinked polyamide product was found to give the best performance of the printed image in terms of printing quality, colour density and colour uniformity. Wet-rub resistance was found to improve with increasing concentration of the crosslinked polyamide product.

AFRIKAANSE OPSOMMING: 'n Onversadigde, lineêre, alifatiese poli-amied is berei vanaf die monomere 1,6- heksaandiamien en fumaarsuur deur middel van 'n fosforilasie-polikondensasie reaksie, waarna die produk suksesvol gekruisbind is tydens 'n inverse-suspensie polimerisasiereaksie. Twee vinielmonomere, naamlik 2-hidroksi-etiel-metakrilaat (HEMA) en 4- viniel-piridien, is gebruik. Die lineêre poli-amied is deur middel van kern magnetiese resonansie (KMR) en elektronsproei-massaspektrornetrie (ESMS) gekarakteriseer, en die kruisgebinde produk deur middel van ligverstrooing, skandeer-elektronrnikroskopie (SEM), en lae-temperatuur SEM. Daar is bevind dat die gemiddelde partikeldeursneë van die kruisgebinde produk tussen 100 en 300 nm was. Een van die bereide, kruisgebinde produkte (wat met HEMA kruisgebind is) is gebruik in bedekkingsformules op stysel-bedekte papier. Die papiermonsters is ge-evalueer en vergelyk ten opsigte van drukkwaliteit en die diepte en egaligheid van die kleur van 'n gedrukte beeld, asook die natskuurweerstand van die deklaag. Daar is bevind dat 'n formulering wat 0.1% van die kruisgebinde poli-amied produk bevat die beste vertoning lewer in terme van drukkwaliteit, kleur diepte en egaligheid van kleur. Daar is verder bevind dat die natskuurweerstand van die deklaag verbeter het wanneer die konsentrasie van die kruisgebinde poli-amied produk in die formulering verhoog is.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/49970
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