The rheological characteristics γ-poly(glutamic acid) (γ-PGA) solution have been investigated. The solution is a typical non-Newtonian shear-thinning fluid with a characteristic n-parameter lower than l．With temperature raised

the viscosity of γ-PGA solution shows the trend of decreasing．Over the angular frequency(ω) range 0.01～100 rad·s-1

the storage modulus (G′) of 5％ (W/V) γ-PGA gels is much higher than its loss modulus (G″) and loss dependent on frequency which showed that γ-PGA has fine elasticity．1％ is close to the threshold concentration needed for gelation．γ-PGA is dispersible in cold water to form weak gel．Continuous heating at high temperature treatment changed the network of γ-PGA gel．Similar results are observed for γ-PGA gels prepared under pH 4 and 12．Addition of 1％～10％ NaCl

7％KCl

MgSO4

ZnSO4 and CaCl2 decrease the G′ of 2％ γ-PGA gel at low frequency and increased G″ over the frequency rang 0.01～100 rad·s-1 which indicated that the formation of elastic network is hindered. However

addition of 1.7％ PbNO3 of 1.7％ AgNO3 makes total loss of viscoelasticity of the 2％ γ-PGA system．