Nanofibrous Wound Dressing with a Smart Drug Delivery System: Poly(N-Isopropylacrylamide)-Conjugated Polycaprolactone Nanofibers Loaded with Curcumin

Abstract

In response to clinical demands for advanced wound dressings, a "smart bandage" was developed by combining polycaprolactone (PCL) nanofibers and the thermoresponsive polymer poly(N-isopropylacrylamide) (PNIPAAm). This bandage incorporates curcumin, an anti-inflammatory and antioxidant agent, to enhance wound healing. The LCST of PNIPAAm (32{degrees}C) enables an "on-off" drug delivery system, transitioning from a hydrophilic coil to a hydrophobic state. The nanofiber matrix was characterized using FTIR spectroscopy, SEM, water contact angle, and dynamic mechanical analysis. Curcumin release was assessed both above and below the LCST. The bandage is comfortable, easy to apply and remove, and promotes rapid wound healing. In vitro studies confirmed its non-toxicity to human dermal fibroblast cells. This "smart bandage" represents a significant advancement in wound care, with the potential to meet clinical requirements and enhance patient compliance, offering controlled drug delivery combined with the therapeutic benefits of curcumin.