Photothermal Regenerated Fibers with Enhanced Toughness: Silk Fibroin/MoS2 Nanoparticles

Abstract

The distinctive mechanical and photothermal properties of Molybdenum sulfide (MoS2) have the potential for improving the functionality and utilization of silk products in various sectors. This paper reports on the preparation of regenerated silk fibroin/molybdenum disulfide (RSF/MoS2) nanoparticles hybrid fiber with different MoS2 nanoparticles contents by wet spinning. The simulated sunlight test indicated that the temperature of 2 wt% RSF/MoS2 nanoparticles hybrid fibers could rise from 20.0 °C to 81.0 °C in 1 min and 98.6 °C in 10 min, exhibiting good thermal stability. It was also demonstrated that fabrics made by manual blending portrayed excellent photothermal properties. The addition of MoS2 nanoparticles could improve the toughness of hybrid fibers, which may be since the mixing of MoS2 nanoparticles hindered the self-assembly of β-sheets in RSF solution in a concentration-dependent manner because RSF/MoS2 nanoparticles hybrid fibers showed a lower β-sheet content, crystallinity, and smaller crystallite size. This study describes a new way of producing high toughness and photothermal properties fibers for multifunctional fibers’ applications.

Effect of CeO2 NPs on stability of regenerated silk fibroin against UV‐aging

“…It illustrates that the addition of CeO 2 NPs would not transform the secondary structure of RSF. In this paper, the relative content of the secondary structure of RSF fiber is calculated semi-quantitatively by analyzing the peak fitting of the IR spectrum amide III region (1200-1300 cm À1 ), 29 because the analysis results of I region and II region are affected by water and oxygen. 36 The content β-sheet of RSF/CeO 2 NPs hybrid fibers is increased 20.58% compared with RSF (Table 2).…”

“…RSF/MoS 2 NPs and RSF/WuO 3 NPs hybrid fibers with high strength and thermal stability through wet spinning technology were produced by our research group. 28,29 In this paper, RSF/CeO 2 NPs hybrid fibers were prepared successfully by wet spinning. 25,30 The morphology, secondary structure, and stability were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) to explain the reasons why RSF/CeO 2 NPs hybrid fibers had eximious mechanical properties and the longer its service life.…”

“…Compared with other preparation methods, wet spinning is more appropriate for prolonging the service life of RSF fibers. RSF/MoS 2 NPs and RSF/WuO 3 NPs hybrid fibers with high strength and thermal stability through wet spinning technology were produced by our research group 28,29 . In this paper, RSF/CeO 2 NPs hybrid fibers were prepared successfully by wet spinning 25,30 .…”

Progress in Research and Application of Modified Silk Fibroin Fibers

“…The filling-modified SF fibers can be prepared by uniformly adding some metal or inorganic nanomaterials into SF to make them possess different functions, such as electrical conductivity, [7,18,30,31] photothermal property, [9,72,73] photoconductivity, [33,87] photochromism, [74] magnetic responsiveness, [75] and antimicrobial property. [76] For instance, adding some conductive fillers to SF solution to endow SF fibers with electrical conductivity is a common method.…”

A silk fibroin/chitosan/nanohydroxyapatite biomimetic bone scaffold combined with autologous concentrated growth factor promotes the proliferation and osteogenic differentiation of BMSCs and repair of critical bone defects

“…At the same time, reduction of crystal particles makes the material's surface area larger, which is more conducive to the formation of chemical bonds with other organic framework materials [ 10 , 11 ]. Silk fibroin is the main component of natural silk and has been clinically used in the production of surgical sutures and artificial skin due to its low immunogenicity and good biocompatibility [ 12 , 13 ]. Chitosan is the only alkaline polysaccharide in natural polysaccharides.…”