*Article* **Catheters with Dual-Antimicrobial Properties by Gamma Radiation-Induced Grafting**

**Lorena Duarte-Peña 1,\*, Héctor Magaña <sup>2</sup> and Emilio Bucio 1,\***


**Abstract:** Dual antimicrobial materials that have a combination of antimicrobial and antifouling properties were developed. They were developed through modification using gamma radiation of poly (vinyl chloride) (PVC) catheters with 4-vinyl pyridine (4VP) and subsequent functionalization with 1,3-propane sultone (PS). These materials were characterized by infrared spectroscopy, thermogravimetric analysis, swelling tests, and contact angle to determine their surface characteristics. In addition, the capacity of the materials to deliver ciprofloxacin, inhibit bacterial growth, decrease bacterial and protein adhesion, and stimulate cell growth were evaluated. These materials have potential applications in the manufacturing of medical devices with antimicrobial properties, which can reinforce prophylactic potential or even help treat infections, through localized delivery systems for antibiotics.

**Keywords:** antimicrobial; antifouling; drug delivery; pH sensitivity; zwitterionic polymers; gamma radiation
