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- W2370826632 abstract "In order to improve the carboxyl production quantity of oxidized cotton fibers,the pretreatment of cotton fibers with NaOH/thiourea/urea was performed before selective oxidation in this paper.The carboxyl groups,cellulose morphology and viscosity of 2,2,6,6-Tetramethyl-1-piperidinyloxy(TEMPO) selective oxidized cotton fibers with and without NaOH/thiourea/urea pretreatment are compared.The results showed that NaOH/thiourea/urea pretreatment accelerated the oxidation reaction rate and increased the amount of carboxyl group,but damaged cotton fibers.Among them,the content of carboxyl group increased with the increasing consistency of fiber firstly,reached the maxium at the fiber consistency of 6%,which has improved the accessibility and the reactivity of the cotton fibers.The morphology of cellulose fibers study shows that the extent of the swelling and dissolve for the oxidized cotton fibers after pretreatment exhibits stronger than that before pretreatment.Under the TEMPO oxidation conditions,increasing cellulose concentration enhances the relative viscosity of the oxidized cotton fibers.However,at higher concentration of cellulose,the increment of the carboxyl content and the degradation degree of cotton fibers are similar to the original during the oxidation process." @default.
- W2370826632 created "2016-06-24" @default.
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- W2370826632 date "2011-01-01" @default.
- W2370826632 modified "2023-09-27" @default.
- W2370826632 title "Effect of NaOH/Thiourea/Urea Pretreatment on TEMPO Selective Oxidation of Cotton Fibers" @default.
- W2370826632 hasPublicationYear "2011" @default.
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