Nanofibre-assisted alignment of carbon nanotubes in macroscopic polymer matrix via a scaffold-based method

Chang, Zhenjun; Zhao, Xinluo; Zhang, Q. H.; Chen, D. J.

doi:10.3144/expresspolymlett.2010.8

Cited by 15 publications

(8 citation statements)

References 28 publications

(29 reference statements)

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“…But the resistivity modification of PMMA by ex situ incorporation technique of MWNT imparts semiconducting nature to the total insulating PMMA. Functionalization along with the used ex situ and in situ technique to improve the electrical conductivity of a totally insulating polymer PMMA. Chang et al29 fabricated composite using polyacrylonitrile nanofibres as a scaffold of MWNTs, and PMMA as the macroscopic polymer matrix by combining electrospinning and in situ polymerization. However, there are scopes to judge other properties of the composites in future investigation. Depending on needs, then we can successfully use the suitable technique to modify PMMA.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Thermogravimetric and resistivity study of Ex situ and In situ poly(methyl methacrylate)/carboxylic acid group functionalized multiwall carbon nanotubes composites

Das

Ray

Bandyopadhyay

et al. 2011

J of Applied Polymer Sci

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Polymer composites based on poly(methyl methacrylate) (PMMA)/carboxylic acid group functionalized multiwall carbon nanotubes (MWCNT) were prepared by the ex situ and in situ techniques with 0.05% loading by weight. Composite films were fabricated by solvent casting method. Electrical conductivity of the composites as well as of the neat PMMA polymer was measured in the temperature range 333 K to 423 K. Neat PMMA samples prepared by the same method showed complete insulating behavior. Ex situ technique leads to a lower value of percolation threshold. Infrared spectroscopy was used to analyze the effect of functionalization of MWCNT on the interfacial bonding of PMMA and MWCNT. Thermogravimetric analysis revealed that the maximum degradation temperature has been shifted to higher region for in situ composites compared to PMMA itself-and the ex situ composites indicated better thermal stability. X-ray diffraction study of composites also indicates that in situ composites functionalization incorporated MWCNT particles in the polymer chain.

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Section: Discussionmentioning

confidence: 99%

“…Functionalization along with the used ex situ and in situ technique to improve the electrical conductivity of a totally insulating polymer PMMA. Chang et al29 fabricated composite using polyacrylonitrile nanofibres as a scaffold of MWNTs, and PMMA as the macroscopic polymer matrix by combining electrospinning and in situ polymerization.…”

Section: Discussionmentioning

confidence: 99%

Thermogravimetric and resistivity study of Ex situ and In situ poly(methyl methacrylate)/carboxylic acid group functionalized multiwall carbon nanotubes composites

Das

Ray

Bandyopadhyay

et al. 2011

J of Applied Polymer Sci

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“…To accelerate the spinning jet or to orient the fibers, these studies either applied extra electrostatic fields in the electrospinning device or changed the gathering equipment to alter the path of jet movement. The implemented techniques reported such as rotating cylinder,24, 25 wire drum,26 tapered wheel‐like bobbin,27–29 auxiliary electrode,30–33 electric field,34 and so on. It is worthy to note that most electrospinning devices connect high‐voltage electrostatic to the spinneret and change the processing parameters (such as voltage, working distance, solution flowing speed, spinneret diameter, etc.)…”

Section: Introductionmentioning

confidence: 99%

Effects of electrostatic polarity and the types of electrical charging on electrospinning behavior

Chiou

Lin

et al. 2012

J of Applied Polymer Sci

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In this study, we examined the effect of applied electrostatic voltages and the types of electrical charging on jet movement, fiber productivity, fiber diameter and deposited configuration by two inverse polarity systems, termed as spinneret and collector charging systems. Jet movement parameters such as Taylor cone, straight jet length, whipping angle, and pitch of whipping loop are examined and compared. The results show that the electronegative collector charging system or the electropositive spinneret charging system is superior to their contrastive system in terms of smaller fiber diameter, compact fiber deposited configuration, and higher fiber productivity. Optimal applied voltage found was 25 kV for electronegative collector charging system and 30 kV for electropositive spinneret charging system and resulted in finest fiber diameter (209 nm for electronegative collector charging system and 247 nm for electropositive spinneret charging system). Polyvinyl acetate solution jet is easier to be ejected, stretched, and accelerated under electropositive charging. The spinning jet with electropositive charges can be achieved either in the spinneret charging system by using electropositive charger or in the collector charging system by using electronegative charger. This finding is an important guideline for the designing of electrospinning device. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: E89-E97, 2012

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“…Polyacrylonitrile (PAN) possesses high mechanical strength thanks to the strong hydrogen bonding of its molecular structure. It also exhibits strong chemical resistance, excellent acid-proof alkalinity, resistance to sunlight, a diminished susceptibility to humidity, and low cost [22][23]. Thus, it has caught the attention of many researchers, in the past 10 years.…”

Section: Fabrication Of Electrospun Polyacrylonitrile Ion-exchange Mementioning

confidence: 99%

Fabrication of electrospun polyacrylonitrile ion-exchange membranes for application in lysozyme adsorption

Chiu¹,

Lin²,

Cheng³

et al. 2011

Express Polym. Lett.

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Abstract. Ion exchange (IEX) chromatography is commonly used in separation and purification systems. However, micropore blockage within its resin structure can easily lead to a reduction in the effectiveness of purification. To tackle this problem, we adopted the concept of membrane separation by combining electrospinning techniques with rapid alkaline hydrolysis to prepare a weak acid IEX nanofibrous membrane (AEA-COOH), consisting of polyethyleneterephthalate (PET) meltblown fabric as a supporting layer, with upper and lower IEX layers consisting of polyacrylonitrile (PAN) nanofibrous membranes. To determine the characteristics of the AEA-COOH membrane, we used the commercial product Sartobind® C IEX membrane as the standard of comparison. Results showed that the base weight and thickness of AEA-COOH were 33 and 64%, relative to Sartobind ® C membrane. The thermo-degradable temperature of AEA-COOH membrane (320°C) was far higher than that of Sartobind ® C (115°C), indicating high thermal stability. Finally, comparisons between the lysozyme adsorption rates and capacity of various IEX membranes confirmed that AEA-COOH was lighter, thinner, faster, possessing higher protein adsorption efficiency than Sartobind ® C membrane.

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Nanofibre-assisted alignment of carbon nanotubes in macroscopic polymer matrix via a scaffold-based method

Cited by 15 publications

References 28 publications

Thermogravimetric and resistivity study of Ex situ and In situ poly(methyl methacrylate)/carboxylic acid group functionalized multiwall carbon nanotubes composites

Thermogravimetric and resistivity study of Ex situ and In situ poly(methyl methacrylate)/carboxylic acid group functionalized multiwall carbon nanotubes composites

Effects of electrostatic polarity and the types of electrical charging on electrospinning behavior

Fabrication of electrospun polyacrylonitrile ion-exchange membranes for application in lysozyme adsorption

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