Preparation and Utilization of Carboxyl-Containing Cation Exchange Cellulose

Abo‐Shosha, M. H.; Ibrahim, Nabil A.; El-Nagdy, E. I.; Gaffar, M. A.

doi:10.1081/ppt-120014398

Cited by 10 publications

(5 citation statements)

References 5 publications

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“…Another possible mechanism of CDP crosslinking was a polycondensation process, which led to citric polyester formation, where the acid esterified itself through a tertiary hydroxyl group 6, 21, 40, 41. However, the hydrolysis of the polyester and chromatographic analysis of the products did not allow us to distinguish between the acid molecules that formed CD esters and those that were linked with the citric hydroxyl group.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, poly(carboxylic acid)s, especially citric acid, have become a popular crosslinking agent; it is able to overcome toxicity and is less costly than the previously mentioned compounds. Citric acid has already been used in the esterification or crosslinking of some polysaccharides, for example, starch4 or cellulose,5–7 and polyhydroxy compounds, such as aliphatic diols,8, 9 glycerol,10 1,4 : 3,6‐dianhydrohexatols,11 sorbitol,12 and also CDs 13–25. Citric acid has also been used as a crosslinking agent for the grafting of CDs onto various materials to enhance their sorption properties.…”

Section: Introductionmentioning

confidence: 99%

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Chemical structure of poly(β‐cyclodextrin‐co‐citric acid)

Bednarz

Łukasiewicz

Mazela

et al. 2010

J of Applied Polymer Sci

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We synthesized water-insoluble polymers, poly(b-cyclodextrin-co-citric acid)s, by heating a mixture of citric acid, cyclodextrin (CD), and Na 2 HPO 4 as a catalyst with a 6 : 1 : 2 molar ratio at 160, 170, and 180 C for 10 and 20 min. The chemical composition of the polyesters was determined by high pressure liquid chromatography (HPLC) analysis of the polymer hydrolysates. The crosslinking mechanisms and thermal degradation of the polymers were also investigated. The polyesters contained 30-35% citric acid, 1-4% unsaturated carboxylic acids (i.e., itaconic, cis-aconitic, trans-aconitic, and mesaconic acids), and 60-70% CD, whereas about 40% of them were able to form inclusion complexes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemical structure of poly(β‐cyclodextrin‐co‐citric acid)

Bednarz

Łukasiewicz

Mazela

et al. 2010

J of Applied Polymer Sci

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“…citric acid, malic acid or tartaric acid, potentiometric titration is used [377,378]. Unsaturated esters such as starch acrylic acid esters have been characterised via the bromide/bromate method or with permanganometric titration [379].…”

Section: Chemical Characterisation -Standard Methodsmentioning

confidence: 99%

Esterification of Polysaccharides

Heinze¹,

Liebert²,

Koschella³

2006

Springer Laboratory

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“…The significant increase in K/S values as well as the remarkable improvement in the imparted UV-protection properties of the simultaneously dyed/finished fabric samples, suggest that, presence of the used substrate (S-XH) along with citric acid (CA), as a crosslinking agent, NaH 2 PO 2 (SHP), as a catalyst, Imperon ® binder (IB), and the basic dye or pigment colorant at proper curing conditions would be expected to promote the following reactions and/or interactions (Scheme 1) (El-Ghoul et al, 2007;Ibrahim et al, 2002Ibrahim et al, , 2007Abo-Shosha, Ibrahim, Elnagdy, & Gaffour, 2002):where ∼XH = -OH groups (of cotton cellulose), ∼CONH and/or terminal-NH 2 and -COOH groups at the end of each chain (Bozic, Kokol, & Guebtiz, 2009) (of polyamide-6 component).…”

Section: Tentative Mechanismmentioning

confidence: 97%