Fig. 3: Surface and bulk polymer properties of ZG-PU.
From: Durable plasma-mediated zwitterionic grafting on polymeric surfaces for implantable medical devices
a Water contact angle was used to determine material hydrophilicity, with b ZG-PU being significantly more hydrophilic than controls, and c retained their hydrophilicity after an extensive mechanical bending programme comprising of 3000 bending cycles. The d Young’s modulus and the e flexural rigidity of ZG-PU were not significantly different to the control samples. f Despite the success of the initial graft, ZG-PU (and PIII-PU) underwent substantial losses in hydrophilicity. Error bars are mean ± standard error; **** indicates a p-value < 0.0001.
