Synthesis and Characteristics of Multi-Walled Carbon Nanotubes-Polyimide Nanocomposite Films

Tsai, Mei‐Hui; Chen, Dong-Sen; Chiang, Pai Kai; Lin, Hsin-Chuan; Jehng, Jih‐Mirn

doi:10.1166/jnn.2008.470

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…However, the more S‐MWNT addition increased the surface roughness as confirmed with the AFM images shown in Figure 7 that the thermal conductivity of S‐MWNT‐PI‐5 was lower than pure PI. Similar trend was observed from the previous results,17 where the decrease in mechanical strength was observed when the composition of S‐MWNT in PI was higher than 1.5 wt %. The mean roughness ( R a ) of hybrids containing 1, 1.5, and 3 wt % of S‐MWNTs was 300–400 nm, 600–700 nm, and 1 μm, respectively.…”

Section: Resultssupporting

confidence: 91%

“…For example, Ma and Lee et al5, 12 prepared silver‐decorated CNTs to increase the electrical conductivity and optical transmittance of CNTs. Polyimides (PIs) with good chemical resistance, superior thermal stability, and high mechanical strength are widely applied in electronic and aerospace industry 14–17. With the addition of single‐walled or multiwalled carbon nanotubes (SWNTs or MWNTs) in the PI matrix, the nanocomposites will have improved thermal conductivity, mechanical strength, electrical conductivity, and dielectric constant for advanced applications 4, 6–8, 15–26.…”

Section: Introductionmentioning

confidence: 99%

“…Polyimides (PIs) with good chemical resistance, superior thermal stability, and high mechanical strength are widely applied in electronic and aerospace industry 14–17. With the addition of single‐walled or multiwalled carbon nanotubes (SWNTs or MWNTs) in the PI matrix, the nanocomposites will have improved thermal conductivity, mechanical strength, electrical conductivity, and dielectric constant for advanced applications 4, 6–8, 15–26. Recently, Zhang et al8 reported an enhanced thermal conductivity of PI nanocomposite to 0.4 W/mK by incorporation of 5 wt % AlO(OH)‐coated MWNTs in PI matrix compared to 0.17 W/mK for pure PI.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal conductivity and morphology of silver‐filled multiwalled carbon nanotubes/polyimide nanocomposite films

Tseng

Lin

Tsai

et al. 2012

J of Applied Polymer Sci

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A facile methodology has been developed to synthesize silver-filled multiwalled carbon nanotubes (S-MWNTs)-polyimide (PI) nanocomposites with high thermal conductivity for applications in flexible printed circuits or buried film capacitors, requiring efficient heat dissipation. MWNTs functioned as modules to facilitate the distribution of Ag particles within PI matrix. The intercalation of Ag within MWNTs was performed using capillary action upon mixing AgNO 3 solution with PI precursor and followed by calcinations to reduce the ionic silver to Ag. The existence of Ag in the PI nanocomposites was observed from transmission electron microscope images and verified with the energy-dispersive X-ray spectrometer. Homogeneous dispersion of SMWNTs in PI matrix and strong interaction between S-MWNTs and PI were also suggested by SEM cross-section images. The thermal conductivity of S-MWNT/PI nanocomposite was a function of the content of S-MWNTs in PI matrix. The PI nanocomposite containing 1.5 wt % of S-MWNTs (S-MWNT/PI-1.5) exhibited the highest thermal conductivity, 0.37 W/mK. A decrease in thermal conductivity was observed while the surface roughness of the nanocomposite was higher than 1 lm owing to the high content of S-MWNT in PI. In addition, the modified MWNTs improved flexibility of the PI matrix. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: E182-E187, 2012

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal conductivity and morphology of silver‐filled multiwalled carbon nanotubes/polyimide nanocomposite films

Tseng

Lin

Tsai

et al. 2012

J of Applied Polymer Sci

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“…Two types of PAA, namely PAA with terminal diamine and PAA with terminal dianhydride, were prepared. Before adding reagents to a three-neck flask, the flask was heated with constant nitrogen purge for one hour, and then the flask was allowed to cool with continued nitrogen purge to assure an oxygen-free condition [ 33 ].…”

Section: Methodsmentioning

confidence: 99%

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Chen

Whang

et al. 2023

Polymers

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Epoxy (EP) was copolymerized with polyamic acid (PAA, precursor of polyimide (PI)) with termanil monomers of (1) 4,4′-Oxydianiline (ODA) and (2) pyromellitic dianhydride (PMDA) individually to form (PI-O-EP) and (PI-P-EP) copolymers. The FTIR spectrum of PI-O-EP copolymerization intermediates shows that some amide-EP linkages were formed at low temperature and were broken at higher temperature; in additoin, the released amide was available for subsequent imidization to form PI. The curing and imidization of the amide groups on PAA were determined by reaction temperature (kinetic vs. thermodynamic control). In PI-P-EP, the released amide group was very short-lived (fast imidization) and was not observed on FTIR spectra. Formation and breakage of the amide-EP linkages is the key step for EP homopolymerization and formation of the interpenetration network. PI contributed in improving thermal durability and mechanical strength without compromising EP’s adhesion strength. Microphase separations were minimal at PI content less than 10 wt%. The copolymerization reaction in this study followed the “kinetic vs. thermodynamic control” principle. The copolymer has high potential for application in the field of higher-temperature anticorrosion.

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“…Carbon nanotubes (CNTs), which were first investigated by Iijima2 in 1991, are one of the most attractive nanoscale fillers because of their high aspect ratio and combination of thermal, electrical and mechanical properties when compared with other nanoparticles. Various groups have studied PI/CNT nanocomposites and have reported significant achievements in the improvement of mechanical and electrical properties 3–8. An interesting application of polymer/CNT nanocomposites for photonics9, 10 was reported recently, this exploiting their merits in optical filters and fine laser controllers.…”

Section: Introductionmentioning

confidence: 99%

Surfactant‐assisted processing of polyimide/multiwall carbon nanotube nanocomposites for microelectronics applications

Tang¹,

Chan²,

Wong³

et al. 2010

Polymer International

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The dispersion and stability of carbon nanotubes (CNTs) inside a polymer matrix, especially with a high CNT content, are still big challenges. Moreover, the interaction between CNTs and the polymer matrix should be strong enough to improve the mechanical properties. The efficient dispersion of CNTs is essential for the formation of a uniform distribution of a CNT network in a polymer composite. Polyimide/multiwall CNT nanocomposites were synthesized by in situ polymerization with the aid of a surfactant. A Fourier transform infrared spectroscopy study proved that the surfactant did not hamper the polymerization of the polyimide. The microstructure, storage modulus and electrical conductivity of the nanocomposites were improved using a particular amount of the surfactant. Environmental stability test results showed that the polyimide with 1 wt% of CNTs produced with the aid of the surfactant possessed excellent reliability in high-temperature and high-humidity environments. Surfactants were successfully used to obtain fine-structure polyimide/CNT nanocomposites by in situ polymerization. The enhancement of the mechanical properties was attributed to the incorporation of the surfactant. A percolation of electrical conductivity could be achieved with 1 wt% of CNTs.

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Synthesis and Characteristics of Multi-Walled Carbon Nanotubes-Polyimide Nanocomposite Films

Cited by 6 publications

References 9 publications

Thermal conductivity and morphology of silver‐filled multiwalled carbon nanotubes/polyimide nanocomposite films

Thermal conductivity and morphology of silver‐filled multiwalled carbon nanotubes/polyimide nanocomposite films

Interpenetration Networked Polyimide–Epoxy Copolymer under Kinetic and Thermodynamic Control for Anticorrosion Coating

Surfactant‐assisted processing of polyimide/multiwall carbon nanotube nanocomposites for microelectronics applications

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