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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: J Biomed Mater Res B Appl Biomater. 2017 Jun 20;106(3):1268–1279. doi: 10.1002/jbm.b.33915

Fig. 1. iCVD polymerization and coating of PHEMA on PDMS ventricular catheters.

Fig. 1

(A) iCVD scheme for coating of PHEMA on the catheters. Each catheter has an outer and inner diameter of 2 and 1 mm, respectively. There are a series of intake holes, 0.5 mm in diameter, near the blind end that are arranged as eight holes spaced 1 mm apart in four rows at 90° apart around the tube circumference. (B) Free radical polymerization reaction to form PHEMA using HEMA monomer and TBPO initiator. With the cooling stage and heated filaments at 25 and 300 °C, respectively, and the reactor pressure at 0.1 Torr, the actual temperature of the catheter surface was recorded to be ≈50 °C.