Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers

Frank den Hoed; Andrea Pucci; Francesco Picchioni; Patrizio Raffa

doi:10.3390/nano9101410

Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers

Frank den Hoed, Andrea Pucci, Francesco Picchioni, Patrizio Raffa

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Onderzoeksoutput: Article › Academic › peer review

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Homogeneous water dispersions of multi-walled carbon nanotubes (MWCNTs) were prepared by ultrasonication in the presence of an amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer. The ability of PS-b-PAA to disperse and stabilize MWCTNs was investigated by UV-vis, SEM and zeta potential. The results show that the addition of a styrene block to PAA enhances the dispersion efficiency of the graphitic filler compared to pure PAA, possibly due to the nanotube affinity with the polystyrene moiety. Notably, the dispersions show an evident pH-responsive behavior, being MWCNTs reaggregation promoted in basic environment. It is worth noting that the responsive character is maintained in solid composites obtained by drop casting, thus indicating potential applications in sensing.

Originele taal-2	English
Artikelnummer	1410
Aantal pagina's	16
Tijdschrift	Nanomaterials (Basel, Switzerland)
Volume	9
Nummer van het tijdschrift	10
DOI's	https://doi.org/10.3390/nano9101410
Status	Published - okt.-2019

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10.3390/nano9101410Licentie: CC BY

Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers Final publisher's version, 4,55 MBLicentie: CC BY

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title = "Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers",

abstract = "Homogeneous water dispersions of multi-walled carbon nanotubes (MWCNTs) were prepared by ultrasonication in the presence of an amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer. The ability of PS-b-PAA to disperse and stabilize MWCTNs was investigated by UV-vis, SEM and zeta potential. The results show that the addition of a styrene block to PAA enhances the dispersion efficiency of the graphitic filler compared to pure PAA, possibly due to the nanotube affinity with the polystyrene moiety. Notably, the dispersions show an evident pH-responsive behavior, being MWCNTs reaggregation promoted in basic environment. It is worth noting that the responsive character is maintained in solid composites obtained by drop casting, thus indicating potential applications in sensing.",

keywords = "MULTIWALLED CARBON NANOTUBES, POLY(ACRYLIC ACID), DISPERSION, FUNCTIONALIZATION, POLYMERIZATION, SURFACTANTS, STRENGTH, BEHAVIOR, SIZE",

author = "{den Hoed}, Frank and Andrea Pucci and Francesco Picchioni and Patrizio Raffa",

year = "2019",

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doi = "10.3390/nano9101410",

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volume = "9",

journal = "Nanomaterials (Basel, Switzerland)",

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AU - den Hoed, Frank

AU - Pucci, Andrea

AU - Picchioni, Francesco

AU - Raffa, Patrizio

PY - 2019/10

Y1 - 2019/10

N2 - Homogeneous water dispersions of multi-walled carbon nanotubes (MWCNTs) were prepared by ultrasonication in the presence of an amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer. The ability of PS-b-PAA to disperse and stabilize MWCTNs was investigated by UV-vis, SEM and zeta potential. The results show that the addition of a styrene block to PAA enhances the dispersion efficiency of the graphitic filler compared to pure PAA, possibly due to the nanotube affinity with the polystyrene moiety. Notably, the dispersions show an evident pH-responsive behavior, being MWCNTs reaggregation promoted in basic environment. It is worth noting that the responsive character is maintained in solid composites obtained by drop casting, thus indicating potential applications in sensing.

AB - Homogeneous water dispersions of multi-walled carbon nanotubes (MWCNTs) were prepared by ultrasonication in the presence of an amphiphilic polystyrene-block-poly(acrylic acid) (PS-b-PAA) copolymer. The ability of PS-b-PAA to disperse and stabilize MWCTNs was investigated by UV-vis, SEM and zeta potential. The results show that the addition of a styrene block to PAA enhances the dispersion efficiency of the graphitic filler compared to pure PAA, possibly due to the nanotube affinity with the polystyrene moiety. Notably, the dispersions show an evident pH-responsive behavior, being MWCNTs reaggregation promoted in basic environment. It is worth noting that the responsive character is maintained in solid composites obtained by drop casting, thus indicating potential applications in sensing.

KW - MULTIWALLED CARBON NANOTUBES

KW - POLY(ACRYLIC ACID)

KW - DISPERSION

KW - FUNCTIONALIZATION

KW - POLYMERIZATION

KW - SURFACTANTS

KW - STRENGTH

KW - BEHAVIOR

KW - SIZE

U2 - 10.3390/nano9101410

DO - 10.3390/nano9101410

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JO - Nanomaterials (Basel, Switzerland)

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ER -

Design of a pH-Responsive Conductive Nanocomposite Based on MWCNTs Stabilized in Water by Amphiphilic Block Copolymers

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