Approaching Superfoldable Thickness-Limit Carbon Nanofiber Membranes Transformed from Water-Soluble PVA

Abstract

Recent progress in flexible electronics has attracted tremendous attention. However, it is still difficult to prepare superfoldable conductive materials with good biocompatibility, high sensing sensitivities, and large specific surface areas. It is expected that biomimetic methods and water-soluble precursors like poly(vinyl alcohol) (PVA) for electrospinning will be utilized to solve the above problems. Inspired by the multistage water management process of a spider spinning dragline silk, we have established a combined biomimetic technique, hydrocolloid electrospinning coupled with temperature gradient dehydration, with a carbonization technique. PVA-driven superfoldable carbon nanofiber membranes (PVA-SFCNFMs) have been prepared that not only possess a >60% micropore ratio and a 1368.8 m 2 /g specific surface area but also can withstand 180°real folding for 100 000 cycles, approaching the thickness limit without structure fracture. Furthermore, these membranes provide highly sensitive sensing and superior biocompatible interfaces. The molecular mechanism to improve carbon conversion and the folding mechanism to obtain "three-level dispersing stress" for the PVA-SFCNFMs have been proposed.

Biomimetic manganese-eumelanin nanocomposites for combined hyperthermia-immunotherapy against prostate cancer

“…However, the majority of the existing photothermal conversion agents are unable to be implemented in clinic attributed to their complicated and time-consuming fabrication procedures and possible long-term safety concerns [ 33 ]. Developing biomimetic nanoplatforms derived from naturally components via convenient procedures is highly beneficial [ 16 , 34 , 35 ], because they can be easily and gradually decomposed into nontoxic small molecular metabolic components [ 36 ]. Melanins are natural occurring biopolymers distributed in various parts of living organisms, possessing excellent biocompatibility and biodegradability [ 37 , 38 ].…”

Numerical Simulation of Temperature Variations during the Application of Safety Protocols in Magnetic Particle Hyperthermia

“…Biomimetic materials are widely used in literature, due to their biophysical properties [ 28 , 29 ]. Among them, agarose is a perfect candidate that simulates the mechanical and thermoelectric properties of tissues.…”

An electrochemical sensor based on electrospun MoS2@SnO2 modified carbon nanofiber composite materials for simultaneously detection of phenacetin and indomethacin

“…Therefore, metal materials with high conductivity and catalytic properties can be easily mixed or doped with carbon fibers to form composite carbon nanofibers. Such modified materials often have synergistic effects and stronger electrochemical properties [7–21] . In our previous report, it was known that SnO 2 was an excellent conductive material with good conductivity in aqueous solution [22] .…”