2019 Volume 48 Issue 5 Pages 426-428
Polydopamine nanoparticles (PDAPs) with an average particle size of about 180 nm were irradiated with a 60Co source. The morphology, thermal stability and free radical signal of γ-irradiated PADPs were characterized. The results suggested that a 200 kGy irradiation dose has little effect on PDAPs. As the γ-irradiation dose increases to 400 kGy, PDAPs degraded significantly, morphology of PDAPs was obviously deformed, thermal stability and EPR intensity was significantly decreased. Furthermore, a degradation mechanism of PDAPs under γ-irradiation was explored.
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