الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The first step including the Egyptian Extra Long Staple Giza88 (Egyptian ELS) which belongs to G. barbadense offer the more level of fiber length, length uniformity, maturity index, strength, micronaire and degree of polymerization in comparison with the Upland Medium Long Staple Burkina Faso cotton BF - FK37 (Upland MLS) which represented as the G. hirsutum. The present study has been undertaken to studied the effect of slack mercerization and bleaching treatments on the mechanical properties of both two genotypes cotton fibers. Furthermore, there was remarkable improvement in fiber elongation after slack mercerization in both of genotypes under studied compared with untreated fibers. Slack mercerization decrease fiber strength and fiber length and increased elongation percent, Micronaire reading and improved fiber color attribute. Bleaching decrease fiber strength and fiber length and increased elongation percent and Micronaire reading. The thermal stability observed that the Egyptian ELS is significantly higher than Upland MLS. The second step aimed to assess the nanocellulose crystals that were extracted from two genetically different types of cottons, the extraction was performed by 60% w/w of H2SO4 rendered active effect for acid depolymerisation of cellulose at 60 ℃ and 60 min of time with high crystallinity (>70%). The TEM images indicated that acid hydrolysis is able to depolymerize cellulose micro chain into nanocrystallites CNC loading was applied alone as well as in a combination with binder finish. It was seen that viscose fabric exhibited better wet strength after applying CNC and binder finishes on it. This improved property of viscose is important through the process of manufacturing and uses of viscose woven fabric.