Conductive Polymer nano-bioComposites (CPC): Chitosan-carbon nanoparticle a good candidate to design polar vapour sensors

Bouvrée, Audrey; Feller, Jean‐François; Castro, Mickaël; Grohens, Yves; Rinaudo, Marguerite

doi:10.1016/j.snb.2009.02.022

Cited by 118 publications

(84 citation statements)

References 41 publications

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“…Conductive polymer composites (CPCs) have attracted a lot of attention in the past few decades, and have many potential applications including antistatic [1], electromagnetic interference shielding [2], sensing [3][4][5][6][7][8], flexible solar cell electrodes [9], field emission [10,11], etc. CPCs can be fabricated by adding conductive filler into an insulating polymer matrix, where a sudden jump in conductivity can be observed while a critical content of filler is incorporated.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect in conductive networks constructed with carbon nanofillers in different dimensions

Zhang¹,

Li²,

Deng³

et al. 2012

Express Polym. Lett.

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Abstract. Herein, investigation on synergistic effect during network formation for conductive network constructed with carbon nanofillers in different dimensions is conducted. Multi-walled carbon nanotubes (MWNTs) and carbon black (CB) are employed as conductive fillers in this system. Morphological control of the conductive network is realized by adjusting the ratio between different fillers. Classical percolation threshold theory and adjusted excluded volume theory are used to analyze the electrical percolating behavior of these systems. It is observed that the percolation threshold of hybrid fillers filled conductive polymer composites (CPCs) is much lower than that of MWNTs or CB filled CPCs, and it can be reduced from 2.4 to 0.21 wt% by replacing half of the MWNTs with CB. Possible mechanism of this phenomenon is discussed together with morphological observation. A model is proposed to understand the mechanism of the percolation behavior in the composites containing various proportions of nanofillers. Our work is important for the design and preparation of low cost conductive polymer composites with novel electrical property. Vol.6, No.2 (2012) 159-168 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2012.17 * Corresponding author, e-mail: huadeng@scu.edu.cn © BME-PT PE/MWNTs composites prepared by melt blending. The value is often between 1 to 5 wt% for melt compounded systems and considered as statistical percolation threshold [22]. The mechanism behind this significant difference between kinetic and statistical percolation is the prohibition of re-aggregation between CNTs during melt compounding process [22,24]. It was reported that the re-aggregation process of CNTs within polymer melt can take hours to complete [25]. To achieve better conductivity or lower cost, more than one kind of filler, particularly fillers in different aspect ratios, are used to prepare CPCs. Regarding the formation of conductive network with fillers in different aspect ratios, theoretical study has shown that it is not necessary to build conductive network with high aspect ratio filler alone [26], and the percolation threshold is sensitive to the portion of high aspect ratio filler in a system containing fillers in different aspect ratios [27]. There are a number of investigations reported in the literature on mixed carbon fillers filled CPCs [26,[28][29][30][31]. However, the percolation thresholds of these systems filled with mixed fillers are only simple average of that for systems filled with a particular kind of carbon filler. Therefore, more study is needed to study the true synergistic effect between conductive fillers of different dimensionality in building conductive network. In current study, CPCs based on mixed filler between carbon nanofillers in different dimensions and polypropylene will be fabricated. It is well known that polyolefin is a widely used material and its processability is prominent. Moreover, due to the difference in filler dimension and intrinsic structure, the networ...

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Section: Introductionmentioning

confidence: 99%

Synergistic effect in conductive networks constructed with carbon nanofillers in different dimensions

Zhang¹,

Li²,

Deng³

et al. 2012

Express Polym. Lett.

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“…The two different selected vQRS, PS-co-POSS/CNT and PMMA-co-POSS/CNT, were exposed to CH 2 O nitrogen/analyte successive cycles of 5 min in order to interpret the responses collected in Figure 5a. The shape of the two curves appears very typical of the LHC model developed to fit the evolution of the chemo-resistive response with the concentration of the analyte and is expressed in Equation (6) [23,79,80]. The LHC model also allows deducing whether penetrating solvent vapour molecules will only slightly adsorb on specific sites (Langmuir), diffuse and form of several layers of vapour molecules on CPC (Henry), or generate plasticization and swelling of the matrix through the clustering of solvent vapour molecules (Clustering).…”

Section: Principle Of Ch 2 O and Nh 3 Detection With Vqrsmentioning

confidence: 99%

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Sachan¹,

Castro

Choudhary³

et al. 2017

Chemosensors

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Nanocomposite-based quantum resistive vapour sensors (vQRS) have been developed from the assembly of hybrid copolymers of polyhedral oligomeric silsesquioxane (POSS) and poly(methyl methacrylate) (PMMA) or poly(styrene) (PS) with carbon nanotubes (CNT). The originality of the resulting conducting architecture is expected to be responsible for the ability of the transducer to detect sub-ppm concentrations of ammonia and formaldehyde at room temperature despite the presence of humidity. In particular, the boosting effect of POSS is evidenced in CNT-based nanocomposite vQRS. The additive fabrication by spraying layer-by-layer provides (sLbL) is an effective method to control the reproducibility of the transducers' chemo-resistive responses. In dry atmosphere, the two types of sensors showed a high sensitivity towards both hazardous gases, as they were able to detect 300 ppb of formaldehyde and 500 ppb of ammonia with a sufficiently good signal to noise ratio (SNR > 10). They also exhibited a quick response times less than 5 s for both vapours and, even in the presence of 100 ppm of water, they were able to detect small amounts of gases (1.5 ppm of NH 3 and 9 ppm of CH 2 O). The results suggest promising applications of POSS-based vQRS for air quality or volatolome monitoring.

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“…They show a substantially greater the surface-area to volume ratio, what makes them better candidates than their bulk counterparts in the terms of their activity [1][2]. Recently, metal nanoparticles, due to their properties, are widely used as antistatic materials, biosensors, conductive inks, adhesives for different electronics, and in switching devices [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Colloidal Metal Surfaces as Biosensors of Biological Samples

Tąta

Gralec

Proniewicz

2017

jcme

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Colloidal solutions of silver (AgNPs), gold (AuNPs), and platinum nanoparticles (PtNps) obtained under controlled conditions in an aqueous media by chemical methods were used as effective biosensors of biological compounds such as bombesins (BN). The BN adsorption at the metal/aqueous interface was investigated by surface-enhanced Raman scattering (SERS). Briefly, the spectral pattern of BN in the silver, gold, and platinum sols is strongly influenced by the indole ring vibrations of L-tryptophan at position 8 of the amino acid sequence (Trp 8 ). In addition, L-methionine (Met) at the C-terminus determines the BN adsorption, mainly onto the AuNPs and AgNPs surfaces.

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Conductive Polymer nano-bioComposites (CPC): Chitosan-carbon nanoparticle a good candidate to design polar vapour sensors

Cited by 118 publications

References 41 publications

Synergistic effect in conductive networks constructed with carbon nanofillers in different dimensions

Synergistic effect in conductive networks constructed with carbon nanofillers in different dimensions

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Colloidal Metal Surfaces as Biosensors of Biological Samples

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