Comparative study on electrical properties of copper nanowire/polypropylene and carbon nanotube/polypropylene composites

Yan, Li; Sundararaj, Uttandaraman

doi:10.1002/aic.14646

Cited by 20 publications

(11 citation statements)

References 43 publications

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“…The aspect ratio was about 160 and their density was about 1.75 g cm −3 . TabkhPaz et al17c showed the length distribution of MWCNTs (NC7000) after internal melt mixing.…”

Section: Methodsmentioning

confidence: 99%

“…High electrical conductivity with low filler contents can be attained in nanocomposites with well‐distributed CNT clusters at the nanoscale, due to achieving an optimum level of dispersion of fillers . One hypothesis is that when using fillers such as CNTs as rubber polarity increases, CNTs dispersion is not thermodynamically favored rather there is more flocculation in more polar rubber matrices .…”

Section: Introductionmentioning

confidence: 99%

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Highly Sensitive and Stretchable Carbon Nanotube/Fluoroelastomer Nanocomposite with a Double‐Percolated Network for Wearable Electronics

Shajari

Mahmoodi

Rajabian

et al. 2020

Adv Elect Materials

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A smart stretchable material is developed from a composite of carbon nanotube (CNT) and fluoroelastomer (FKM), which is fabricated via an internal melt‐mixer method. A unique, double‐percolated, electrically conductive network is observed with ultralow percolation thresholds of 0.45 phr and 1.40 phr CNT. This provides the CNT/FKM nanocomposites with a wide range of strain sensitivity. Thin‐film nanocomposites at the first plateau of conductivity show an ultrahigh sensitivity with a gauge factor (GF) of 1010 at 23% strain for 0.6 phr and of 6750 at 34% strain for 1 phr. At the second plateau of conductivity, 1.5 phr nanocomposite corresponds to higher levels of strain of 78% strain with ultrahigh GF of more than 4 × 104 and 2 phr nanocomposite to almost 100% strain with GF of 1.3 × 105. The CNT/FKM nanocomposites possess a high elongation at break of 430% and up to 232% strain sensitivity. The unique distribution of CNTs in the polar fluoroelastomer FKM facilitates simultaneous high sensitivity and high stretchability, and improved mechanical strength over reported polymer‐based nanocomposite stretchable sensors. The novel, stretchable CNT‐based FKM conductors have great potential for wearable electronics such as stretchable sensors, stretchable light‐emitting diodes (LEDs), and human motion monitoring.

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“…The aspect ratio was about 160 and their density was about 1.75 g cm −3 . TabkhPaz et al17c showed the length distribution of MWCNTs (NC7000) after internal melt mixing.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Stretchable Carbon Nanotube/Fluoroelastomer Nanocomposite with a Double‐Percolated Network for Wearable Electronics

Shajari

Mahmoodi

Rajabian

et al. 2020

Adv Elect Materials

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“…where is the sample melting enthalpy, as measured by DSC, 0 is the melting enthalpy of 100% crystalline PP, which is reported to be 207.1 J/g 58,59 , and is the weight fraction of CB present in the nanocomposite. 60 a) c) b) Table 3.…”

Section: Dielectric Analysis Altered Percolation Thresholds Of Carbomentioning

confidence: 99%

New Routes to Functionalize Carbon Black for Polypropylene Nanocomposites

et al. 2016

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Methods for chemical surface functionalization for carbon black (CB) nanoparticles were studied to produce (CB)/polypropylene (PP) nanocomposites with superior electrical and thermal properties. Nanoparticle dispersion is known to directly control the extent to which nanocomposites maximize the unique attributes of their nanoscale fillers. As a result, tailored nanoparticle surface chemistry is a widely utilized method to enhance the interfacial interactions between nanoparticles and polymer matrices, assisting improved filler dispersion. In this work, a rapid chemical functionalization approach using a number of diarylcarbene derivatives, followed by the azo-coupling of substituted diazonium salts, for the covalent introduction of selected functional groups to the CB surface, is reported. Characterization of the modified CB by XPS, TGA, CHN, and ATR-IR collectively confirmed surface functionalization, estimating surface grafting densities of the order of 10(13) and 10(14) molecules/cm(2). Nanocomposites, synthesized by solvent mixing PP with pristine and modified CB, demonstrated macroscopic property changes as a result of the nanoparticle surface functionalization. Pronounced improvements were observed for PP nanocomposites prepared with a dodecyl-terminated diaryl functionalized CB, in which TEM analysis established improved nanofiller dispersion owing to the enhanced CB-PP interfacial interactions in the nanocomposite. Observed dielectric relaxation responses at 20 wt % loading and a reduced percolation threshold realized conductivities of 1.19 × 10(-4) S cm(-1) at 10 wt %, compared to 2.62 × 10(-15) S cm(-1) for pristine CB/PP nanocomposites at the same filler loading. In addition, thermal properties signify an increase in the number of nucleation sites by the raised degree of crystallinity as well as increased melting and crystallization temperatures.

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“…For example, the polypropylene (PP)/CNT nanocomposites (fibers, foams, bars, etc.) have been studied for mechanical reinforcement , dimensional stability , wear resistance , crystallization , antistatic behavior , electromagnetic shielding , thermal and electrical conductivity , mechanical sensors , and so forth. CNTs have also been reported to reduce die swell and even promote “die shrinkage” due to their larger aspect ratio forming entangled CNT network.…”

Section: Introductionmentioning

confidence: 99%

Rheological behavior of polypropylene nanocomposites with tailored polymer/multiwall carbon nanotubes interface

Wang

Gulgunje

Ghoshal

et al. 2019

Polymer Engineering & Sci

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Maleic anhydride grafted polypropylene (MA-g-PP) or polypropylene (PP) was noncovalently coated onto acid functionalized multiwall carbon nanotube (f-MWNT) through solution mixing. These coated f-MWNTs and pristine MWNT (p-MWNT) were melt microcompounded with neat PP to form PP/f-MWNT and PP/p-MWNT nanocomposites at 0.1-1 wt% MWNT concentration. Complex viscosity and tan δ (ratio of loss modulus to storage modulus) behavior of these systems were studied using dynamic frequency sweep test, while relaxation time, activation energy, and melt homogeneity were also calculated and compared. Among the three types of samples, PP/f-MWNT masterbatch-based nanocomposite demonstrated not only the presence of interphase but also good processability. As a consequence, increase of both the crystallization rate in the presence of shear and the melt elasticity during annealing were found only in the masterbatchbased samples but not in the PP/p-MWNT. The mechanism of such increased melt elasticity was attributed to the formation of the space-spanning network, which is consistent with the Cole-Cole plot showing similar behavior to the branched polymers in the literature. This has implications in polymer processing due to suggested changes in the balance between melt strength and polymer flow. Nanocomposite rheological behavior has also been correlated with the mechanical properties.

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Comparative study on electrical properties of copper nanowire/polypropylene and carbon nanotube/polypropylene composites

Cited by 20 publications

References 43 publications

Highly Sensitive and Stretchable Carbon Nanotube/Fluoroelastomer Nanocomposite with a Double‐Percolated Network for Wearable Electronics

Highly Sensitive and Stretchable Carbon Nanotube/Fluoroelastomer Nanocomposite with a Double‐Percolated Network for Wearable Electronics

New Routes to Functionalize Carbon Black for Polypropylene Nanocomposites

Rheological behavior of polypropylene nanocomposites with tailored polymer/multiwall carbon nanotubes interface

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