Homogeneous acylation of xylan with 3, 5-dinitrobenzoyl in ionic liquid and the adsorption property. (5th September 2015)

• Record Type: Journal Article
• Authors: Kong, Weiqing; Dai, Qingqing; Ren, Junli; Ma, Nianfang
• Is Part Of: Carbohydrate polymers. Volume 128(2015)
• Page Start: 105
• Page End: 111
• Publication Date: 2015-09-05
• Subjects: Xylan -- Xylan 3, 5-dinitrobenzoate -- Homogenous synthesis -- Ionic liquid -- Absorption; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2015.04.006
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Homogeneous acylation of xylan with 3, 5-dinitrobenzoyl was performed in 1-butul-3-methylimidazolium chloride. The maximum degree of substitution of 1.77 for the resulting product was obtained. The new xylan esters could be as absorbents for the removal of creatinine. The highest creatinine adsorption capacity was 2.45 mg/g at 23 °C, pH 7.0. Abstract: A new xylan ester (xylan 3, 5-dinitrobenzoate) as a creatinine adsorbent was prepared by the homogeneous acylation of xylan with 3, 5-dinitrobenzoyl chloride in 1-butul-3-methylimidazolium chloride ionic liquid. The influences of reaction conditions on the degree of substitution values of xylan esters were discussed. Results indicated that xylan esters with the degree of substitution range from 1.34 to 1.77 were obtained under the given conditions. The FTIR and 13 C NMR spectroscopies provided the evidence of grafting 3, 5-dinitrobenzoyl groups onto the backbone of xylan. Moreover, the adsorption properties of the xylan ester for creatinine were also investigated. Isotherm studies showed that the sorption capacities for creatinine were 2.45, 2.08 and 1.86 mg/g for 23, 30 and 37 °C, respectively. Thermodynamic studies performed indicated the sorption process mainly was controlled by the chemical adsorption. Therefore, xylan 3, 5-dinitrobenzoate displayed the promising application in the treatment of chronic renal failure by the creatinine adsorption as the new oral adsorbent.