Biodegradable flexible conductive film based on sliver nanowires and PLA electrospun fibers

Abstract

Biodegradable conductive films are crucial for the sustainable development of wearable electronics. In this work, a flexible and degradable conductive film was prepared based on a carefully designed interface of polylactic acid (PLA) electrospun fibers and silver nanowires (AgNWs). The amphiphilic triblock copolymer was added to PLA solution for electrospinning, followed by solvent posttreatment to induce the hydrophilic block of the amphiphilic triblock copolymer to migrate to the fiber surface. Dopamine can be uniformly polymerized on the surface of hydrophilic PLA fibers, and the prepared PLA@PDA fiber film can form a good interface combination with AgNWs. The electrical conductivity of AgNWs/PLA@PDA flexible film can reach 258.5 S cm−1, showing obvious Joule heating effect and good mechanical properties. Degradation experiments showed that in phosphate buffered saline, the PLA molecular chain showed a dynamic equilibrium due to the scission and rearrangement of the ester groups and degraded slowly, while AgNWs/PLA@PDA degraded rapidly under alkaline conditions. Our study provides a simple and controllable method to prepare flexible degradable electronic films, which is expected to be applied to flexible wearable bioelectrodes.

Electrospun Fenoprofen/Polycaprolactone @ Tranexamic Acid/Hydroxyapatite Nanofibers as Orthopedic Hemostasis Dressings

“…As a result, fenoprofen molecules were evenly dispersed throughout the PCL matrix at a molecular level without the formation of fenoprofen crystal nuclei or potential crystal growth. The compatibility between the three small molecular drugs and the polymer fibers is important for both the stability of nanofibers and their functional performances [90][91][92], which can be disclosed through FTIR spectra (Figure 6b) and their molecular formula (Figure 6c). In FTIR tests, different groups can be observed.…”

Preparation and Investigation of Cellulose Acetate/Gelatin Janus Nanofiber Wound Dressings Loaded with Zinc Oxide or Curcumin for Enhanced Antimicrobial Activity

“…This can be attributed to the loose structure of the fiber membrane caused by the presence of CUR and ZnO NPs. The nanoparticles filled the gaps between the fibers, reducing fiber spacing and hindering fiber movement, ultimately leading to a decrease in the overall mechanical properties of the fiber membrane [43,44].…”

Engineered shapes using electrohydrodynamic atomization for an improved drug delivery

“…The overlook to a certain extent about manipulating the shapes of EHDA products can be reflected by the noticeable evidence about beads-on-a-string products. These products are frequently viewed as useless by-products and should be avoided both during the electrospinning and electrospraying processes (Ali et al, 2021;Pehta et al, 2017;Peng et al, 2024;Yan et al, 2024). However, those special shapes have been demonstrated to be more useful than their counterparts of electrospun linear nanofibers and also electrosprayed special particles for biphasic drug controlled release profiles (Sun et al, 2023;.…”