Abstract
Abstract Silk fibroin (SF) film is an insulating material, which can be combined with polythiophene derivatives with electrical conductivity to obtain a flexible conductive material. In this work, poly(3,4-ethylenedioxythiophene) (PEDOT) was used to graft a silk protein film. The hydroxyl radical is formed by activation and oxidation of the silk protein film polymerized with the PEDOT radical formed by oxidation of 3,4-ethylenedioxythiophene to obtain a conductive silk film. The SF/PEDOT film, when tested, showed excellent electrical conductivity with resistance up to 63 Ω·cm−2, good flexibility, mechanical properties, fastness, and biocompatibility.
Highlights
Traditional electronic products based on mono crystalline silicon, metals, and metal oxides have high rigidity# These authors contributed to this work.Among many conductive polymers, poly(3,4-ethylenedioxythiophene) (PEDOT) has the unique structural characteristics of low redox potential, small band gap width, and more electron donating groups [12]
The Silk fibroin (SF)/PEDOT film was placed in a room with a constant temperature of 20°C and RH of 65% for 24 h, and a simple circuit composed of 3 W light-emitting diode (LED) beads, SF/PEDOT film, SZT-C rapid constant voltage tester (Suzhou Lattice Electronics Co., Ltd.), and wires was assembled
The pure SF film and conductive SF/PEDOT membrane were soaked in 2 mL of DMEM complete medium for 48 h, and the supernatant was taken as the sample leachate
Summary
Traditional electronic products based on mono crystalline silicon, metals, and metal oxides have high rigidity. Poly(3,4-ethylenedioxythiophene) (PEDOT) has the unique structural characteristics of low redox potential, small band gap width, and more electron donating groups [12]. It has excellent stability and high conductivity in oxidation state. Conductive polymers are compounded with natural biomaterials to obtain flexible conductive materials with good biocompatibility [15], such as conductive films. A flexible conductive film with good stability was fabricated through grafting of EDOT onto the surface of the SF film. Thanks to the good biocompatibility of PEDOT and SF, the prepared SF/PEDOT membrane has good prospect in flexible and conductive biomaterials [19]. All the chemicals were of analytical reagent grade and were used without further purification
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