Thermal stability and electrical behavior of polydimethylsiloxane nanocomposites with carbon nanotubes and carbon black fillers

Mazlan, Norkhairunnisa; Aziz, Azizan; Mariatti, M.; Ismail, Hanafi; Sim, L. C.

doi:10.1177/0021998311412985

Cited by 76 publications

(36 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each of these typical shapes are more, or less, effective at introducing a novel property to a polymer. Spherical particles (d p /L = 1), for example, are least effective for creating a percolating particle network (Norkhairunnisa M. et al, 2012). This is a drawback for electrical conductivity (Norkhairunnisa M. et al, 2012) but quite beneficial for preserving a higher breakdown strength in dielectrics (Feng Y. et al, 2015).…”

Section: Why "Nano"mentioning

confidence: 99%

Nanoparticle Filler Content and Shape in Polymer Nanocomposites

Blattmann

Pratsinis

2019

KONA

View full text Add to dashboard Cite

Car tires, sealing caulk and high-voltage cable insulators are prime examples of commercially available and widely used composites of polymers containing nanostructured particles. In fact, myriads of applications can be realized but the usefulness of such nanocomposites depends heavily on composition, morphology, concentration and dispersion homogeneity of the nanoparticle filler in the polymer matrix. Optimizing these characteristics while ensuring economically feasible fabrication, determines the extent to which new products integrate nanocomposites. This review discusses challenges and manufacturing options of polymer nanocomposites and, in particular, which and how much nanoparticle fillers improve electrical/thermal conductivity, dielectric permittivity, gas permeability, magnetization and mechanical stability by critically reviewing and classifying over 280 peer-reviewed articles. Lastly, the economic, environmental and health implications associated with these materials are highlighted.

show abstract

Section: Why "Nano"mentioning

confidence: 99%

Nanoparticle Filler Content and Shape in Polymer Nanocomposites

Blattmann

Pratsinis

2019

KONA

View full text Add to dashboard Cite

show abstract

“…43 Highly stretchable and flexible materials with strain at break much higher as compared to the matrix formed ( Figure 7). 58,59 An increase in the amount of filler does not lead to a further change in the thermal properties of the nanocomposites. The influence of the filler on the mechanical properties is more pronounced in the low strain regime, while with increasing the strain, the filler influence is less pronounced (see Figure 7 insert and Table 2).…”

Section: Synthesis and Characterization Of Agnp Compositesmentioning

confidence: 99%

Highly stretchable dielectric elastomer composites containing high volume fractions of silver nanoparticles

et al. 2015

View full text Add to dashboard Cite

The dielectric permittivity (ε') of a polymeric material can be significantly increased when blended with conductive fillers at concentrations approaching percolation threshold. However, reproducible synthesis of such composites is after decades of research still a major challenge and a bottleneck for their application. Difficulties arise in controlling size and shape of the filler as well as in its homogenous distribution within the composite. These parameters strongly affect the dielectric as well as the mechanical properties of the composite. While a substantial amount of literature is dealing with the influence of conductive filler on the dielectric properties of composites, little is known about their mechanical properties. It is therefore still an important goal to synthesize materials with simultaneously high ε' and good mechanical properties. Here, we report the synthesis of dielectric elastomers that combine key properties such as high flexibility and stretchability, high thermal stability, increased ε', low dielectric loss and conductivity. Such materials were prepared by solution processing using quasi-spherical silver nanoparticles (AgNPs) of defined size in a polydimethylsiloxane matrix (M w = 692 kDa). To prevent percolation, the AgNPs were coated with a thin silica shell (<4 nm). To increase their compatibility with the silicone matrix, these core/shell nanoparticles were passivated with a silane reagent. The insulating silica shell around the particles precisely defines the minimum approach distance between the cores as twice the shell thickness. The dielectric properties of those passivated particles (filler) were measured in pellets and found to have an almost frequency independent value of ε' = 90 and a very low loss factor tan δ = 0.023 at high frequencies. When such particles were used as filler in a polydimethylsiloxane matrix, composites with low dielectric losses were obtained. A composite containing 31 vol% filler with ε' = 21 and a tan δ = 0.03 at ~1 kHz was achieved. At a AgNPs volume fraction of 20%, the composite has a ε' = 5.9 at ~1 kHz, a dielectric strength of 13.4 V/µm, elastic modulus as low as 350 kPa at 100% strain, and a strain at break of 800%. Due to the high specific energy density per volume at low electric fields, these composites are attractive materials in applications involving low electric fields.A composite of Ag/SiO 2 core/shell nanoparticles 20 vol% in polydimethylsiloxane with ε' = 5.9, E b = 13.4 V/µm, Y 100% = 350 kPa, a strain at break of 800% is presented.

show abstract

“…The addition of thermally resistant additives is the simplest and most effective method for improving the thermal stability of SR. Generally, researchers use inorganic fillers or metal oxides, such as BN, Fe 2 O 3 , and SnO 2 , to suppress the thermal degradation of SR . However, these particles have poor compatibility with SR compared with carbon materials, such as carbon nanotubes or graphene …”

Section: Introductionmentioning

confidence: 99%

Effect of the sheet size on the thermal stability of silicone rubber–reduced graphene oxide nanocomposites

Wang

Qiu

Jiao

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

The structures of differently sized reduced graphene oxides (rGOs), the dispersion state, and the compatibility of rGO with silicone rubber (SR) are important impact factors on the properties of SR-rGO nanocomposites. To analyze the influence of the size of rGO on the properties of SR-based nanocomposites, three differently sized rGO sheets were introduced into SR to fabricate a series of SR-based nanocomposites. The SR-middle-sized reduced graphene oxide (MrGO) nanocomposites showed the best mechanical and thermal properties. Compared with the blank sample, the SR-MrGO nanocomposites presented remarkable two-fold and three-fold increases in the tensile modulus and strength values. The initial degradation temperature increased nearly 40 C. In this study, we investigated the size effect of graphene on the thermal stability by examining the thermal degradation mechanism of the different SR-rGO nanocomposites in detail. Ultimately, this research may suggest a facile approach for improving the thermal stability of SR.

show abstract

Thermal stability and electrical behavior of polydimethylsiloxane nanocomposites with carbon nanotubes and carbon black fillers

Cited by 76 publications

References 37 publications

Nanoparticle Filler Content and Shape in Polymer Nanocomposites

Nanoparticle Filler Content and Shape in Polymer Nanocomposites

Highly stretchable dielectric elastomer composites containing high volume fractions of silver nanoparticles

Effect of the sheet size on the thermal stability of silicone rubber–reduced graphene oxide nanocomposites

Contact Info

Product

Resources

About