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Abstract
The original work presented In this thesis was undertaken with vIew to search for new and proper chemical pretreatments for enhancing post-printing with disperse dyes as well as upgrading of fastness and UV-protecting properties of the obtained polyester- containing prints, I.e. PET, PET/W, PET/V and PET/C
To achieve the aforementioned goals, the following options were studied:
1- Disperse printing and UV-protecting of polyester-containing fabrics pretreated with chitosan/PEG/DMDHEU.
II- Enhancement of printing and UV-blocking properties of
Polyester and polyester/wool fabrics by aminolysis.
III- Viable options for improving transfer printing and UV- blocking properties of polyester-based textiles using MCT- BCD, Chitosan and Ethylenediamine.
Given below are summaries of and conclusions arrived at from these studies.
I. DISPERSE PRINTING AND UV-PROTECTING OF POLYESTER-CONTAINING FABRICS PRETREATED WITH CHITOSAN/PEG/ DMDHEU
Chitosan, which is an amino-polysaccaride, can be used to enhance the affinity of polyester-containing fabrics, i.e. PET, PET/W, PET/C, and PET/V, for disperse printing. It is possible to get union disperse printing of the above-mentioned substrates after chitosan/PEG/DMDHEU pretreatment .
In:
- A significant modification of the treated substrates via introducing of chitosan primary amino groups as well as PEG- moieties onto and/or into the fabric structure thereby improving, the extent of disperse printing as well as upgrading washing, rubbing and perspiration fastness properties of the obtained prints.
With respect to the surface modification by pretreatment, the SEM photographs revealed the deposition of chitosan on the treated fabrics.
- Type of substrate, PEG, and disperse dye, significantly affected the depth of the obtained prints.
- The influence of pretreatment on both the depth of the obtained prints as well as on their UV-protection capacities is very significant.
- The highest UPF values appear with pre-treated and disperse printed polyester and PET/W fabrics regardless of the used disperse dye.
II. ENHANCEMENT OF PRINTING AND UV-BLOCKING PROPERTIES OF POLYESTER AND POLYESTER/ WOOL FABRICS BY AMINOLYSIS
The chemical modification of polyester fibers with bifunctional aliphatic amine, EDA, results In:
- Simultaneous generation of both amine and carboxyl functional groups onto the fiber surface thereby enhancing Its hydrophilicity and post-printing with acid and basic dyes.