Preparation of regenerated cellulose bead and its coating with cyclodextrins

Document Type

Article

Publication Date

1-1-2013

Abstract

A study on grafting functional host molecules of cyclodextrins (CDs) onto cellulose beads is reported in this paper. Cellulose beads were prepared by our self-made circumrotation centrifugal machine. Host molecules of β-cyclodextrin (β-CD), (2,6-dimethyl)-β-cyclodextrin (DM-β-CD), and (2-hydroxypropyl)-β-cyclodextrin (HP-β-CD) were grafted onto the surface of the cellulose beads in the presence of polycarboxylic acids, such as 1,2,3,4-butanetetracarboxylic acid or citric acid. The optimum preparation conditions, including curing temperature, β-CD concentration in impregnation solution and catalyst, were evaluated by the grafting rate and the active β-CD content, respectively. DM-β-CD and HP-β-CD, as long as they carried enough remaining OH groups, could be successfully grafted on the cellulose beads. Besides, depending on the results of Phenolphthalein probe detection, materials weight gain, FTIR spectroscopy and, SEM microscopic observation, the factors that influence the encapsulation ability of the functional spherical biomaterials were discussed in detail.

Publication Source (Journal or Book title)

Cellulose Chemistry and Technology

First Page

37

Last Page

47

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