Influence of metal oxide nanoparticles on morphological, structural, rheological and conductive properties of mulberry silk fibroin nanocomposite solutions

Yadav, Reetu; Purwar, Roli

doi:10.1016/j.polymertesting.2020.106916

Cited by 16 publications

(6 citation statements)

References 36 publications

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“…SF contains approximately 5.3%(mol) of tyrosine, which is adequate for inducing gelation in a few seconds using visible light and photoinitiators [26,27]. Although this crosslinking approach improves mechanical strength and rapidly fabricates 3D structures via 3D printing, it still presents some limitations, including low viscosity, absence of specific rheological properties required for extrusion-based printing, and challenges associated with shrinkage in protein-based scaffolds [8,28].…”

Section: Resultsmentioning

confidence: 99%

Silver nitrate-assisted photo-crosslinking for enhancing the mechanical properties of an alginate/silk fibroin-based 3D scaffold

Moon,

Choi,

Cha

et al. 2024

Biofabrication

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Scaffolds play a pivotal role in tissue engineering and serve as vital biological substitutes providing structural support for cell adhesion and subsequent tissue development. An ideal scaffold must possess mechanical properties suitable for tissue function and exhibit biodegradability. Although synthetic polymer scaffolds offer high rigidity and elasticity owing to their reactive side groups, which facilitate tailored mechanical and rheological properties, they may lack biological cues and cause persistent side effects during degradation.To address these challenges, natural polymers have garnered attention owing to their inherent bioactivity and biocompatibility. However, natural polymers such as silk fibroin (SF) and tyramine-modified alginate–tyramine (AT) have limitations, including uncontrolled mechanical properties and weak structural integrity. In this study, we developed a blend of SF and AT as a printable biomaterial for extrusion-based 3D printing. The use of photocrosslinkable SF/AT inks facilitated the fabrication of complex scaffolds with high printability, thereby enhancing their structural stability. The incorporation of silver nitrate facilitated the tunability of mechanical and rheological behaviors. SF/AT scaffolds with varying stiffness in the physiologically relevant range for soft tissues (51–246 kPa) exhibited excellent biocompatibility, indicating their promising potential for diverse applications in tissue engineering.

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Section: Resultsmentioning

confidence: 99%

Silver nitrate-assisted photo-crosslinking for enhancing the mechanical properties of an alginate/silk fibroin-based 3D scaffold

Moon,

Choi,

Cha

et al. 2024

Biofabrication

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“…Referring to Figure 3a, the LVR of DES-Mic and DES-Con was found between 0.1 and 1.0 % strain stress, which was relatively lower compared to gels or polymers which typically exhibit linear viscoelastic behavior up to 10 % strain. [46][47] This is because DES was formed through molecular interactions such as hydrogen bonding whereas gels and polymers involved complex bonding, cross- linking or entanglement of structural features. When more than 1.0 % strain stress was applied, the G' decreased, indicating the disruption of hydrogen bonding network of both DES-Mic and DES-Con.…”

Section: Strain Sweep Analysismentioning

confidence: 99%

Microwave‐Assisted Preparation of an Acidic Deep Eutectic Solvent: Green Analysis, Characterization and Application

Yap,

Wang,

Gan

2024

ChemistrySelect

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Microwave irradiation was postulated to reduce time and energy for deep eutectic solvent (DES) production which is in line with the principle of green chemistry. In this study, the choline chloride (ChCl)‐malic acid (MA) DES was prepared using microwave‐assisted (DES‐Mic) and conventional (DES‐Con) approaches. Microwave was a relatively greener approach as it was rapid (5 min) and consumed 92.8 % energy less than DES‐Con. Moreover, DES‐Mic and DES‐Con exhibited similar physicochemical profiles (pH, solubility, density) and rheological properties. Structural profiling through FTIR analysis suggested hydrogen bond formation between the functional groups of ChCl and MA. The FTIR spectra also did not show structural differences in the DES synthesized using different methods. DES‐Mic and DES‐Con exhibited superior 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) (80.8±0.1 and 83.2±0.3 %, respectively) free radical scavenging activities than ChCl (15.6±0.8 %), MA (20.0±1.4 %) and ChCl:MA aqueous mixture without subjected to DES synthesis conditions (ChCl:MAaq; 23.3±0.8 %). Both DES were also proven as more efficient solvents for the extraction of polysaccharides from ramie leaf, as they recorded higher yields (21.4±1.9 and 22.2±1.0 %, respectively) than equimolar of MA (17.7±2.6 %) and ChCl (6.4±0.2 %). Overall, microwave was proven as a more sustainable approach for DES preparation compared to conventional method, which could be further improvised for industrial applications.

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“…[55,56] In case of PA-g-GO, the peak at 3297 cm À1 attributes to N H stretching vibration of the amide group ( NH CO ) which reveals the presence of PA6 chains. Meanwhile, the peaks at 1639 and 1560 cm À1 are assigned to amide I (C N stretching) and amide II (N H bending stretching), [57] respectively. The evolution of chemical states is further investigated by XPS analysis.…”

Section: Characterizationmentioning

confidence: 99%

Effects of functionalized graphene oxide modified sizing agent on the interfacial and mechanical properties of carbon fiber reinforced polyamide 6 composites

et al. 2022

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In this study, a novel functionalized graphene oxide (F-GO) modified polyamide 6 (PA6) sizing agent is developed to improve the interfacial and mechanical properties of carbon fiber (CF) reinforced PA6 composites. To enhance compatibility between GO and sizing agent, PA6 molecular chains are covalently grafted onto the GO sheets in advance. The results show that the F-GO modified sizing layer improves interfacial compatibility and wettability of the CF surface. Moreover, F-GO nanoparticles retard crack propagation along the interface based on the reinforcement effect. Accordingly, the interfacial shear strength increases by 54.5% from 45.1 MPa for desized CF/PA6 composites to 69.7 MPa for F-GO modified sizing agent treated CF/PA6 composites. Meanwhile, the average interlaminar shear strength, tensile strength, and flexural strength increase by 45.2%, 15.6%, and 19.3% from 45.7, 1307.4, and 792.2 MPa for desized CF/PA6 composites to 66.3, 1511.2, and 945.2 MPa for those reinforced with the CFs treated by the F-GO modified sizing agent due to the effective stress transfer across the interface. The improvement in the mechanical properties is verified based on the cross-section morphology and fracture surfaces.

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Influence of metal oxide nanoparticles on morphological, structural, rheological and conductive properties of mulberry silk fibroin nanocomposite solutions

Cited by 16 publications

References 36 publications

Silver nitrate-assisted photo-crosslinking for enhancing the mechanical properties of an alginate/silk fibroin-based 3D scaffold

Silver nitrate-assisted photo-crosslinking for enhancing the mechanical properties of an alginate/silk fibroin-based 3D scaffold

Microwave‐Assisted Preparation of an Acidic Deep Eutectic Solvent: Green Analysis, Characterization and Application

Effects of functionalized graphene oxide modified sizing agent on the interfacial and mechanical properties of carbon fiber reinforced polyamide 6 composites

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