Chitosan particle/multiwall carbon nanotube composites by electrostatic interactions

Baek, Seung‐Hoon; Kim, Bumsu; Suh, Kyung‐Do

doi:10.1016/j.colsurfa.2007.09.021

Cited by 52 publications

(24 citation statements)

References 23 publications

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“…Therefore, edge plane like sites in MWCNTs are likely to be the reason of the enhanced current response of TPs at MWCNTs-CS. Secondly, the synergistic effect of MWCNTs together with CS is considered to be an important factor for the increasing of current response [39,40].…”

Section: The Voltammetric Response Of Tps At Bare Gce and The Mwcnts-mentioning

confidence: 99%

Adsorptive Stripping Voltammetric Detection of Tea Polyphenols at Multiwalled Carbon Nanotubes‐Chitosan Composite Electrode

Guo

Zheng

et al. 2009

Electroanalysis

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This study reports the catalytic oxidation and detection of tea polyphenols (TPs) at glassy-carbon electrode modified with multiwalled carbon nanotubes-chitosan (MWCNTs-CS) film. The adsorption of TPs at the surface of the MWCNTs through p -p conjugation prevents the aggregation of nanotubes and induces a stable MWCNTs suspension in water over 30 days. Based on the adsorptive accumulation of polyphenols at MWCNTs, TPs is sensitively and selectively detected by adsorptive stripping voltammetry. The accumulation conditions and pH effect on the adsorptive stripping detection were examined. The linear range was found to be 100 to 1000 mg L À1 with a detection limit of 10 mg L À1 (S/N ¼ 3) for 2.5 min accumulation. Additionally, the MWCNTs-CS electrode is easily renewed by applying positive potential to remove the adsorbed TPs. This method was successfully applied to determine TPs in commercially available teas with satisfied result compared with that of conventional spectrometric analysis.

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Section: The Voltammetric Response Of Tps At Bare Gce and The Mwcnts-mentioning

confidence: 99%

Adsorptive Stripping Voltammetric Detection of Tea Polyphenols at Multiwalled Carbon Nanotubes‐Chitosan Composite Electrode

Guo

Zheng

et al. 2009

Electroanalysis

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“…So, the focus has been turned to organic materials, and conducting polymers which possess conjugated π 60-62 bonds have been gradually adopted as ER materials because this type of materials possesses the capability of being polarized under an electric field, thus indicating high dielectric constant. [63][64][65][66][67][68][69][70][71][72][73][74] Besides this, those which have high polarizable functional groups on the molecular backbone can also be applied as an ER material. Among all the applicable conducting polymers, the PANI has been regarded as an essential candidate for the ER materials owing to its high conductivity, easy synthesis, good environmental stability, and various potential applications such as electrochromic devices, chromatography, electrostatic discharge protection and corrosion-protecting paint.…”

Section: Introductionmentioning

confidence: 99%

Electrorheologically intelligent polyaniline and its composites

2010

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Electrorheological (ER) fluids are generally composed of electrically polarizable inorganic or organic particles dispersed in insulating oils. These materials are intelligent/smart materials in that they are capable of changing their state from liquid-like to solid-like very quickly under an applied electric field. This feature article reviews the literature regarding the fabrication of conducting polyaniline (PANI) and PANI composite particles, their ER performance, as well as their chemical and physical characteristics of morphology and crystal structure. The ER behavior of these intelligent materials was also analyzed using a range of rheological equations of state and their dielectric properties.

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“…Chitosan nanoparticles have been extensively studied as drug delivery system in recent years (Hua et al, 2011;Jana et al, 2013;Ali et al, 2014). At present, the most common methods for the preparation of chitosan particles were covalent crosslinking (Zheng et al, 2011;Almalik et al, 2013), ion crosslinking (Pan et al, 2002;Sang et al, 2013), sedimentation (Mao et al, 2001) and self-assembly (Baek et al, 2008). However, some concerns have been raised regarding to the safety of chitosan nanoparticles due to the use of toxic crosslinking reagent such as glutaraldehyde, aldehydes and glyoxal, which can inactivate macromolecule drugs (Fürst and Banerjee, 2005;Gupta & Jabrail, 2006;Ajit et al, 2007) and restrict their wide application.…”

Section: Introductionmentioning

confidence: 99%

Development of drug-loaded chitosan–vanillin nanoparticles and its cytotoxicity against HT-29 cells

Wang

Yang

et al. 2014

Drug Delivery

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Chitosan as a natural polysaccharide derived from chitin of arthropods like shrimp and crab, attracts much interest due to its inherent properties, especially for application in biomedical materials. Presently, biodegradable and biocompatible chitosan nanoparticles are attractive for drug delivery. However, some physicochemical characteristics of chitosan nanoparticles still need to be further improved in practice. In this work, chitosan nanoparticles were produced by crosslinking chitosan with 3-methoxy-4-hydroxybenzaldehyde (vanillin) through a Schiff reaction. Chitosan nanoparticles were 200-250 nm in diameter with smooth surface and were negatively charged with a zeta potential of À 17.4 mV in neutral solution. Efficient drug loading and drug encapsulation were achieved using 5-fluorouracil as a model of hydrophilic drug. Drug release from the nanoparticles was constant and controllable. The in vitro cytotoxicity against HT-29 cells and cellular uptake of the chitosan nanoparticles were evaluated by methyl thiazolyl tetrazolium method, confocal laser scanning microscope and flow cytometer, respectively. The results indicate that the chitosan nanoparticles crosslinked with vanillin are a promising vehicle for the delivery of anticancer drugs.

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Chitosan particle/multiwall carbon nanotube composites by electrostatic interactions

Cited by 52 publications

References 23 publications

Adsorptive Stripping Voltammetric Detection of Tea Polyphenols at Multiwalled Carbon Nanotubes‐Chitosan Composite Electrode

Adsorptive Stripping Voltammetric Detection of Tea Polyphenols at Multiwalled Carbon Nanotubes‐Chitosan Composite Electrode

Electrorheologically intelligent polyaniline and its composites

Development of drug-loaded chitosan–vanillin nanoparticles and its cytotoxicity against HT-29 cells

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