The oil in water (O/W) type raw lacquer emulsion (RLE) was prepared by using a mixed emulsifier of urushiolbased emulsifier (UE)/polyvinyl alcohol (PVA).The effects of concentration of urushiolbased emulsifier UE10 (cUE10)

mixed emulsifier UE10/PVA concentration (cME) and the structure of UE on the rheology of RLE were investigated.The results showed that the viscosity of RLE increased with increasing cUE10

and RLE exhibited shearthinning behavior.At low concentration of mixed emulsifier UE10/PVA(cME≤8.5%)

RLE belonged to pseudoplastic fluids

and shearthinning character was observed.As cME was increased to no less than 9.0%

the viscosity of RLE decreased remarkably with the increasing of shear rate

pass through a minimum

then increased slowly with increasing shear rate

and RLE exhibited swell fluids characteristics.The viscosity of RLE increased with increasing the chain length of oxyethyl groups in UE molecules

and the flow curves of RLE prepared by UE with different chain length of oxyethyl groups were well described by the Hershel-Bulkley equation.Networklike structure between RLE particles became stronger with increasing of chain length of oxyethyl groups in UE molecules.