Poloxamer and gelatin gel guided polyaniline nanofibers: synthesis and characterization

Bhowmick, Biplab; Mollick, Md. Masud Rahaman; Mondal, Dibyendu; Maity, Dipanwita; Bain, Mrinal Kanti; Bera, Nirmal Kumar; Rana, Dipak; Chattopadhyay, Sanatan; Chakraborty, Mukut; Chattopadhyay, Dipankar

doi:10.1002/pi.4657

Cited by 17 publications

(6 citation statements)

References 51 publications

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“…The TGA curves showed a two-step weight loss process (Figure 3a). The first step can be attributed to the removal of water and the second one to the decomposition of the polymer [37]. Under nitrogen atmosphere, higher temperatures were needed and the binder was not totally eliminated since a remnant of 1% was observed.…”

Section: Optimization Of Binder Removalmentioning

confidence: 99%

Titanium Scaffolds by Direct Ink Writing: Fabrication and Functionalization to Guide Osteoblast Behavior

Vidal

Torres

Guillem-Marti

et al. 2020

Metals

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Titanium (Ti) and Ti alloys have been used for decades for bone prostheses due to its mechanical reliability and good biocompatibility. However, the high stiffness of Ti implants and the lack of bioactivity are pending issues that should be improved to minimize implant failure. The stress shielding effect, a result of the stiffness mismatch between titanium and bone, can be reduced by introducing a tailored structural porosity in the implant. In this work, porous titanium structures were produced by direct ink writing (DIW), using a new Ti ink formulation containing a thermosensitive hydrogel. A thermal treatment was optimized to ensure the complete elimination of the binder before the sintering process, in order to avoid contamination of the titanium structures. The samples were sintered in argon atmosphere at 1200 °C, 1300 °C or 1400 °C, resulting in total porosities ranging between 72.3% and 77.7%. A correlation was found between the total porosity and the elastic modulus of the scaffolds. The stiffness and yield strength were similar to those of cancellous bone. The functionalization of the scaffold surface with a cell adhesion fibronectin recombinant fragment resulted in enhanced adhesion and spreading of osteoblastic-like cells, together with increased alkaline phosphatase expression and mineralization.

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Section: Optimization Of Binder Removalmentioning

confidence: 99%

Titanium Scaffolds by Direct Ink Writing: Fabrication and Functionalization to Guide Osteoblast Behavior

Vidal

Torres

Guillem-Marti

et al. 2020

Metals

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“…35,36 A significantly lower diffraction angle has suggested the presence of interlamellar structure in all PAni-containing hydrogels at 2θ = 6.4 . 37,38 The inset to Figure 3 shows that the characteristic diffraction peak has been observed at 2θ = 12.1 for GO analogous to the interplanar spacing of 41.8 nm. XRD of rGO displays a broad peak centered at 24.6 with a smaller interplanar spacing of 20.5 nm, implying that oxygenated functional groups get removed upon reduction.…”

Section: Xrd Analysismentioning

confidence: 97%

Hierarchical three dimensional polyaniline/N‐doped graphene nanocomposite hydrogel for energy storage applications

et al. 2022

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With the rapid development of portable, lightweight, and flexible electronics, the requirement for advanced energy storage systems has arisen that need to be flexible and cost‐effective with higher power/energy densities. In this context, a two‐step approach has been adopted to develop a binder‐free and flexible supercapacitor electrode on carbon cloth based on hierarchical three dimensional (3D) conducting polymer hydrogels. Firstly, nitrogen‐doped graphene (NGN) was synthesized using urea as a reducing as well as a doping agent. Subsequently, polyaniline (PAni) hydrogel has been grown on NGN nanosheets via insitu oxidative polymerization in the vicinity of carbon cloth and further utilized as an electrode for electrochemical measurements. Here, phytic acid was used as a gelatinizer and as a dopant resulting in the formation of a cross‐linked hydrogel structure. The direct deposition of PAni/NGN nanocomposite on carbon cloth strengthens the juncture involving the carbon cloth and electrode material, resulting in enhanced electron transmission. The 3D hydrogel architecture ascertains robust contact between electrolyte and electrode for an efficient charge storage system. For a two‐electrode symmetric arrangement, at 1 A/g, PAni/NGN nanocomposite hydrogel displayed a maximum specific capacitance of 808.7 F/g due to the pseudocapacitive reaction on/near the accessible surface area, as well as an outstanding rate capability and cyclic performance due to electric double layer capacitance (EDLC). The supercapacitor cell delivered maximum specific power and specific energy value of 0.44 kW/kg and 13.63 Wh/kg, respectively. Thus, the composite hydrogel has the benefit of being able to be utilized directly as binder‐free supercapacitor electrodes, leading to viable choice for high‐performance and cost‐effective energy storage devices.

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“…Since the production of nanofibers has gained increasing attention in recent years, several conventional scaffold fabrication techniques have been developed. Some of the most commonly used methods include the sonochemical method ( Lee et al, 2019b ), template-based synthesis ( Zhao et al, 2021b ), self-assembly ( Jiang et al, 2021 ), electrospinning ( Teo and Ramakrishna, 2006 ; Zahmatkeshan et al, 2019 ), and polymerization ( Bhowmick et al, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Electrospun hybrid nanofibers: Fabrication, characterization, and biomedical applications

Abadi

Goshtasbi

Bolourian

et al. 2022

Front. Bioeng. Biotechnol.

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Nanotechnology is one of the most promising technologies available today, holding tremendous potential for biomedical and healthcare applications. In this field, there is an increasing interest in the use of polymeric micro/nanofibers for the construction of biomedical structures. Due to its potential applications in various fields like pharmaceutics and biomedicine, the electrospinning process has gained considerable attention for producing nano-sized fibers. Electrospun nanofiber membranes have been used in drug delivery, controlled drug release, regenerative medicine, tissue engineering, biosensing, stent coating, implants, cosmetics, facial masks, and theranostics. Various natural and synthetic polymers have been successfully electrospun into ultrafine fibers. Although biopolymers demonstrate exciting properties such as good biocompatibility, non-toxicity, and biodegradability, they possess poor mechanical properties. Hybrid nanofibers from bio and synthetic nanofibers combine the characteristics of biopolymers with those of synthetic polymers, such as high mechanical strength and stability. In addition, a variety of functional agents, such as nanoparticles and biomolecules, can be incorporated into nanofibers to create multifunctional hybrid nanofibers. Due to the remarkable properties of hybrid nanofibers, the latest research on the unique properties of hybrid nanofibers is highlighted in this study. Moreover, various established hybrid nanofiber fabrication techniques, especially the electrospinning-based methods, as well as emerging strategies for the characterization of hybrid nanofibers, are summarized. Finally, the development and application of electrospun hybrid nanofibers in biomedical applications are discussed.

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Poloxamer and gelatin gel guided polyaniline nanofibers: synthesis and characterization

Cited by 17 publications

References 51 publications

Titanium Scaffolds by Direct Ink Writing: Fabrication and Functionalization to Guide Osteoblast Behavior

Titanium Scaffolds by Direct Ink Writing: Fabrication and Functionalization to Guide Osteoblast Behavior

Hierarchical three dimensional polyaniline/N‐doped graphene nanocomposite hydrogel for energy storage applications

Electrospun hybrid nanofibers: Fabrication, characterization, and biomedical applications

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