Electrospun nanofibers of polyferrocenylsilanes with different substituents at silicon

Wang, Jianjun; Dai, Lixing; Gao, Qiang; Wu, Pengfei; Wang, Xinbo

doi:10.1016/j.eurpolymj.2007.12.015

Cited by 15 publications

(5 citation statements)

References 27 publications

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“…We report herein the electroactuation of polymer microfibers made from an ethoxysilane derivative of redox active polyferrocenylmethylvinylsilane (PFMVS) 3, Scheme . Cross-linked fibers of average diameter 2.0 ± 0.4 μm are fabricated by electrospinning high molecular weight polymer solutions of 3 (0.1 ≤ m/n ≤ 1.0) after initiating the acid-catalyzed condensation of ethoxysilane . In cases of low cross-link density, resultant fibers rapidly respond (<100 ms) to electrical stimuli applied either via an electrode or by titration with redox active compounds.…”

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confidence: 99%

Electroactuation of Alkoxysilane-Functionalized Polyferrocenylsilane Microfibers

et al. 2010

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Cross-linked conductive polymer networks that mediate chemical, electronic, optical, and mechanical signals are enticing materials from which to construct actuators and sensors as well as more complex polymer-fiber-based structures capable of emulating natural cytoskeletal stress fibers such as actin. In this work we have synthesized and characterized a novel class of high molecular weight electroactive polyferrocenylsilane (PFS) that has been functionalized with pendant alkoxysilane groups and which can be conveniently gelled by sulfonic acid catalyzed condensation of the cross-linkable alkoxysilanes. These PFS electroactive gels are capable of converting an electrical signal to mechanical stress and strain as a result of a change in dimension in response to electrochemical oxidation or reduction coupled with transport of charge balancing ions and solvent molecules in PFS. Electrospinning of these polymer solutions is possible using a 5 kV voltage applied between a needle and indium tin oxide (ITO) substrate on to which fibers are collected. ITO substrates with collected fibers thereupon are incorporated into miniature electrochemical cells containing lithium triflate/gamma-butyrolactone electrolyte and examined using optical microscopy. Applying 1.5-2.0 V anodic potential to the ITO results in immediate oxidation of PFS fibers followed by strain induced buckling. This buckling occurs in many cases as regular sinusoid perturbations along the fiber. Application of cathodic 2.0 V potential causes most of the distorted fibers to return to their initial form. Such inherent shape memory is potentially useful in creating microswitches, microactuators, and micromanipulators.

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confidence: 99%

Electroactuation of Alkoxysilane-Functionalized Polyferrocenylsilane Microfibers

et al. 2010

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“…Five different TCDs were chosen (10,13,15,18, and 20 cm) between the tip of the needle and the grounded plate (collector). The other parameters were 25 wt% PLGA, 0.25% MWNTs, 0.27 mm inner diameter needle, and 20 kV voltage.…”

Section: Tip-to-collector Distancementioning

confidence: 99%

“…12 Using various electrospinning parameters, the morphology and diameter of nanofibers from certain polymers alter the properties of the fiber, such as mechanical, thermal, electrical, and biological properties. 13–16 The strength, the conductivity, and gas-jet/electrospinning of the fibers are sensitive to the diameter of the electrospun nanofibers and influence the hydrophobic behavior of fiber mats. 17–19 Since the morphology and diameter of fibers play such an important role in the properties of the electrospun fiber mats, we investigate the relationship between them and the electrospinning parameters.…”

Section: Introductionmentioning

confidence: 99%

Effects of electrospinning parameters on morphology and diameter of electrospun PLGA/MWNTs fibers and cytocompatibility in vitro

Zhang

2011

Journal of Bioactive and Compatible Polymers

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Poly(lactic- co-glycolic acid) (PLGA)/multiwalled carbon nanotubes (MWNTs) composite fiber mats were prepared by electrospinning and gas-jet/electrospinning. The morphology and diameter of the electrospun PLGA/MWNTs fibers were tailored by controlling process parameters; smooth and uniform PLGA/MWNTs fibers were obtained by using the following optimized process parameters, 25 wt% PLGA concentrations, 0.25% w/v MWNTs contents, 20 kV applied voltage, 13 cm tip-to-collector distances, 0.27 mm inner diameters, and 0.2 mL/min feeding rates. The cytocompatibility of the PLGA/MWNTs fibers prepared by optimizing process parameters was evaluated using rat bone marrow-derived mesenchymal stem cells. Good-quality cell attachment and characteristic cell morphology were observed on the fibers. The PLGA/MWNTs fiber mats, fabricated by electrospinning, indicate excellent potential for bone tissue engineering applications, particularly as scaffolds for bone tissue regeneration.

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“…One dimensional nanocomposite fibers are used in sensors, membrane filtration, biomedical applications, energy production, etc. due to their improved electrical, optical and chemical properties [1][2][3][4][5][6][7]. there are various methods to produce nanofibers, including drawing, templates, phase separation, self-assembly, and electrospinning [8].…”

Section: Introductionmentioning

confidence: 99%

Titania Nanoparticles Doped Electrospun Membranes

Celik Madenli,

Ciftci

2024

Archives of Metallurgy and Materials

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Electrospun membranes exhibit very promising properties, such as high surface area, high surface area-to-pore volume ratio, high pore interconnectivity, and uniform pore distribution. Nanoparticles are a promising alternative for improving the properties of the electrospun membranes. Titania nanoparticles, which are stable, resistant, and non-toxic, have various applications including water treatment, sensors, food additive and cosmetics. Due to the high hydrophilicity of titania nanoparticles, membrane fouling is reduced in titania nanoparticles doped membranes. Titania nanoparticle doped polyacrylonitrile (PAN) nanocomposite electrospun membranes were prepared by electrospinning method in this work. Compared to bare PAN electrospun membranes 0.05% titania nanoparticles doped electrospun membranes have thinner nanofibers, higher hydrophilicity and almost 2 times lower bovine serum albumin adsorption, which shows lower fouling tendency.

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Electrospun nanofibers of polyferrocenylsilanes with different substituents at silicon

Cited by 15 publications

References 27 publications

Electroactuation of Alkoxysilane-Functionalized Polyferrocenylsilane Microfibers

Electroactuation of Alkoxysilane-Functionalized Polyferrocenylsilane Microfibers

Effects of electrospinning parameters on morphology and diameter of electrospun PLGA/MWNTs fibers and cytocompatibility in vitro

Titania Nanoparticles Doped Electrospun Membranes

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