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Study Of The Graft Modification Of Valonea Extract And Its Application In Leather Tanning

D.Y.Yang, Z.L.Da, F.X.Qiu

The graft modification conditions of the valonea extract with acrylic monomers by graft co-polymerization method were studied. The structures of the tanning materials in valonea extract both before and after modification were characterized by FT-IR. The vertical section of leather tanned with different valonea extract at different tanning steps were examined by transmission electron microscope(TEM). The grain surface statuses of different leather were characterized by scan electron microscope(SEM). The properties of the modified valonea extract were investigated. The result showed that under the certain conditions, the modified product produced by the reaction of the graft co-polymerization possesses better physical properties and more excellent tanning properties than those of the unmodified valonea extract.