الفهرس 
الغلافOnly 14 pages are availabe for public view
 |  | from | 181 |  |  |
| | | from | 181 | | |
Abstract
SUMMARY
,The original work presented in this thesis was undertaken
" ~ "ith a view to search for the proper printing and functional I
[finishing formulations and conditions for attaining high quality
fwool-containing prints, i.e. wool, wool/cotton and wool/viscose . with outstanding functional properties, Le; antibacterial, . antibacteriallUV -protection, soft-handle, and water/oil repellency together with durability to wash.
To achieve the aforementioned goals, the following options were investigated:
I.Utilization of monochlorotriazine " ~ "-cyclodextrin for enhancing printability and functionality of wool.
II. Combined UV -protecting and reactive printing of cellulosic/wool blends.
III. Smart options for simultaneous functionalization and pigment coloration of cellulosic/wool blends.
Given below are summaries of and conclusions arrived at from these studies.
I. UTILIZATION OF MONOCHLOROTRIAZINE Il-CYCLODEXTRIN FOR ENHANCING PRINTABILITY AND FUNCTIONALITY OF WOOL
This study investigates the chemical grafting of monochlorotriazinyl " ~ "-cyclodextrin (MCT -" ~ "CD) onto/into wool fabric, and the impact of wool modification on enhancing the extent of post-printing and subsequent antibacterial finishing. The results reported in this study demonstrate that:
-Pre-modification of wool fabric with MCT -" ~ "CD has positive impacts on printing properties using different dyestuffs as well as enhancing the extent of loading triclosan and Ag-NP’s antibacterial agents using the ’ following treatment sequence: premodification using MCT-" ~ "CD -+ printing -+ after-treatment with the selected antibacterial agents, thereby improving the performance properties of the obtained wool prints along with upgrading their antibacterial activities.
- The performance and washing durability of the imparted antibacterial functions depend on the type of the used antibacterial agent as well as its extent of loading onto the modified-printed wool structure.
II.COMBINED UV-PROTECTING AND REACTIVE
PRINTING OF CELLULOSICIWOOL BLENDS
Herein, we report the feasibility of enhancing both the printing properties and UV -protecting functionalities of cotton/wool and viscose/wool fabric blends in one step to increase the value addition and diversification. To achieve this goal, printing formulations, using Na-alginate as a thickening agent, were modified via incorporation of certain functional additives namely MCT-" ~ "CD, 4-hydroxy benzophenone, UV¬SUN® eEL LIQ UV -absorber, ZnO-nanoparticles, and Ti02¬nanoparticles. Factors affecting both the printing and functional properties of the treated substrates such as type and i concentration of additive, kind of substrate, as well as the used
I dyestuff were investigated. The obtained results reveal that:
l - Reactive printed Cellulosic/wool blends with an excellent UV -protection functions have been developed by including certain UV -absorbers namely 4¬hydroxybenzophenone and UV -SUN® or UV -blockers like ZnO-NP’s and TiOrNP’s along with MCT-" ~ "CD in the printing reactive formulations.
- Compared with the used UV -absorbers, nano-scale metal oxides, ZnO-and TiOrNP’s, UV-blockers exhibit better UV-protection capacity.
The extent of improvement In UPF . values of the obtained printings, as a function of type of additive, follows the decreasing order:
ZnO-NP’s > TiOrNP’s > 4-hydroxybenzophenone " ~ " UV¬S" ~ " » none> untreated.
- The depth of the obtained prints, fastness properties and their UV -protection capacities are governed by type of substrate, cotton/wool > viscose/wool, and the functionality of reactive dye, i.e. mono (Reactive Blue 19) or bi-functional (Reactive Red 198).
- After 15 washes, the printed fabrics still had an excellent UV -protection functions.
- The developed process can be easily adapted on industrial scale using the available printing equipments. III. SMART OPTIONS FOR SIMULTANEOUS FUNCTIONALIZATION AND PIGMENT COLORATION OF CELLULOSICIWOOL BLENDS
In the present study, we develop a novel one-step process for producing cellulosic/wool pigment prints with desirable and durable functional and printing properties via incorporation of certain functional finishing agents, at proper concentration, into the pigment printing pastes followed by screen printing and microwave curing. All modified pigment prints were monitored for printability, fastness properties, functionality, and durability to wash. In addition, mode of interactions as well as surface modification of some printed fabric samples were also confirmed by SEM and EDX analysis. The obtained results show that:
- Functionalized cotton/wool and viscose/wool pigment prints were achieved by individual including of chitosan (2.5g1Kg), Aloe vera (IOglKg), triclosan (lOglKg), TiOr NP’s (1 OglKg), silicone softener (20glKg) or water/oil repellent agent (40glKg) in the print paste, followed by screen printing and microwave fixation at 1300W/4 min.
- The enhancement in the imparted functional property such as antibacterial, antibacteriallUV -protection, soft¬handle or water-repellency along with the improve in the printing properties are governed by both• the type of the functional additive and the kind of substrate.
The functionalized pigment prints were found to have good functionality and printability even 15 consecutive laundering cycle.
•Finally, the obtained results have important practical implications for the establishment of simultaneous functional finishing and pigment printing in one step process talking both the environmental and economical aspects in concern.