Bio-based polymer nanofiber with siliceous sponge spicules prepared by electrospinning: Preparation, characterisation, and functionalisation

In this study, SS attached to plant bodies were subjected to acid and heat treatments, followed by grinding, to obtain 10–40-nm siliceous sponge spicules (SSS). SSS and polylactic acid (PLA) were then combined to create 50–450-nm PLA/SSS composite nanofibers. The morphology and bioactivity of the electrospun PLA/SSS nanofibers were examined; the tensile, thermal, and water-resistant properties of the fibers were also evaluated. Our results showed a dramatic enhancement in the thermal and tensile properties of PLA with increasing SSS content; specifically, a 3 wt% increase in SSS content resulted in a 47 °C increase in the initial decomposition temperature and a 73.3-MPa increase in Young's modulus. The water resistance of PLA/SSS increased with SSS content, as indicated by the increase in the water contact angle compared with PLA nanofibers. PLA/SSS nanofibers also exhibited slightly enhanced human foreskin fibroblast cell proliferation, good cytocompatibility, and an antibacterial effect. The enhanced antibacterial and biodegradable properties of PLA/SSS are expected to be useful in biomedical material applications.Graphical abstract
Source: Materials Science and Engineering: C - Category: Materials Science Source Type: research