CHEMICAL MODIFICATION OF THE SURFACE OF CALCIUM ALGINATE GEL BEADS*

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CHEMICAL MODIFICATION OF THE SURFACE OF CALCIUM ALGINATE GEL BEADS*

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- CHEMICAL MODIFICATION OF THE SURFACE OF CALCIUM ALGINATE GEL BEADS*
- Vol. 22, Issue 2, Pages: 183-186(2004)
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- Published：20 April 2004
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CHEMICAL MODIFICATION OF THE SURFACE OF CALCIUM ALGINATE GEL BEADS*[J]. 2004, 22(2): 183-186.
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CHEMICAL MODIFICATION OF THE SURFACE OF CALCIUM ALGINATE GEL BEADS*[J]. 2004, 22(2): 183-186. DOI：

摘要

The chemical modification of the surface of calcium alginate gel beads (CAGB) via grafting copolymerization with vinyl acetate (VAc) was studied. The optimum reaction conditions with activation and graft copolymerization two steps were explored. First

5 grams CAGB with 2.5 mm initial diameter was initiated with 0.0493 mol/L K2S2O8 at 51℃ for 30 min in 15 mL 1 % PVA/H2O. Then 4.34 moi/L VAc was added dropwise and the reaction was allowed to proce at 48 ℃ for 3 h. The grafting efficiency could come up to 30%. It was found the stability of modified CAGB in the air and in electrolyte solutions was greatly improved.

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