Abstract:

In order to study the main chemical compositions and the ultraviolet protective properties of vegetable dyes extracted from scutellaria baicalensis,the ultraviolet absorption spectrums of scutellaria baicalensis solution were tested by spectrophotometer. The main chemical compositions of scutellaria baicalensis were characterized by high pressure liquid chromatography(HPLC) and the ultraviolet protective properties for the cotton fabric dyed by the scutellaria baicalensis solution also were tested.The results show that the absorption of the vegetable dyes extracted from scutellaria baicalensis in the ultraviolet region is high.The main chemical compositions of vegetable dyes extracted from scutellaria baicalensis are baicalin,wogonoside,baicalein and wogonin.The vegetable dyes contain some chemical groups that can absorb ultraviolet.So the vegetable dyes belongs to the ultraviolet absorbent.The ultraviolet protection properties for the cotton fabric dyed by the scutellaria baicalensis dye solution are good.The UPF value is 82.67 and the T(UVA)AV value is 1.33%.The UPF and T(UVA)AV values meet the Chinese National Standard,so the cotton fabric can be called UV-resistant textile.

Key words: Scutellaria baicalensis, ultraviolet resistance, vegetable dye, high performance liquid chromatography