Influence of graphene nanoplatelet incorporation and dispersion state on thermal, mechanical and electrical properties of biodegradable matrices

Kashi, Sima; Gupta, Rahul; Kao, Nhol; Hadigheh, S. Ali; Bhattacharya, Sati N.

doi:10.1016/j.jmst.2017.10.013

Cited by 59 publications

(42 citation statements)

References 63 publications

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“…Nanocomposites exhibit improved physical properties, compared to those of the unfilled polymer matrix, i.e., Mechanical strength [ 10 , 11 ], dielectric properties [ 12 , 13 ], thermal properties [ 14 ], and fire resistance [ 15 , 16 ], etc. Oliviero et al [ 17 ] studied the dielectric properties of sustainable nanocomposites, based on zein protein and lignin for biodegradable insulators.…”

Section: Introductionmentioning

confidence: 99%

Preparing the Degradable, Flame-Retardant and Low Dielectric Constant Nanocomposites for Flexible and Miniaturized Electronics with Poly(lactic acid), Nano ZIF-8@GO and Resorcinol Di(phenyl phosphate)

et al. 2018

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Degradable, flame retardant, and flexible nanocomposite films with low dielectric constant were prepared with poly (lactic acid) (PLA), nano ZIF-8@GO, and degradable flame-retardant resorcinol di(phenyl phosphate) (RDP). The SEM results of the fractured surfaces indicated that ZIF-8@GO and RDP were dispersed uniformly in the PLA matrix. The prepared films had good mechanical properties and the tensile strength of the film with 1.5 wt% of ZIF-8@GO was increased to 48.2 MPa, compared with 38.5 MPa of pure PLA. Meanwhile, the nanocomposite films were flexible due to the toughing effect of RDP. Moreover, above 27.0% of limited oxygen index (LOI) and a VTM-0 rating were achieved for the nanocomposite films. The effects of nano ZIF-8@GO hybrids and RDP on the dielectric properties were investigated, and the results showed that ZIF-8@GO and RDP were beneficial in reducing the dielectric constant and dielectric loss of the nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Preparing the Degradable, Flame-Retardant and Low Dielectric Constant Nanocomposites for Flexible and Miniaturized Electronics with Poly(lactic acid), Nano ZIF-8@GO and Resorcinol Di(phenyl phosphate)

et al. 2018

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“…This suggests that samples 5 and 6 have smaller degrees of crystallinity compared to other samples. It is important to note that the DSC profiles and data reported in Figure 8 and Figure 9 are from the second cooling and heating cycles and therefore the discrepancies could not be due to the thermal history of the samples since the first heating cycles have erased the thermal history of the samples [20,24]. It is also worth mentioning here that the second cooling and heating cycles for all samples superimposed the first cooling and heating cycles almost completely.…”

Section: Resultsmentioning

confidence: 99%

Understanding the Effects of In-Service Temperature and Functional Fluid on the Ageing of Silicone Rubber

et al. 2019

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With an organic/inorganic hybrid nature, silicone elastomers are amongst the most versatile engineering materials, exploited in a wide range of applications either as end-products or in manufacturing processes. In many industrial machines, silicone components are exposed to in-service conditions, such as high or low temperatures, contact with functional fluids, mechanical loading, and deformations, which can adversely affect these components and reduce their lifespan, leading to machine failure in turn. The present study investigates the behaviour of a silicone component of a manufacturing equipment and the variations in the part’s properties due to in-service conditions (temperature, exposure to heat transfer fluid, and mechanical deformation) to develop a monitoring tool. An experimental design was employed to study the main and the interaction effects of temperature (22 °C, 180 °C), medium (air, synthetic heat transfer fluid), and strain (0%, 200%) on the silicone component’s properties. Results showed that while the chemistry of the component remains intact, its thermal and in particular mechanical properties are largely influenced by the in-service conditions. Consequently, leading to a physical rather than a chemical failure of the component and limiting its service life. Statistical analysis revealed that high temperature and the exposure to the heat transfer fluid have the most sever effects. Moreover, these two manufacturing parameters were found to have a significant interaction with one another, whose effect cannot not be neglected.

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“…On the one hand, nanoparticles with ordered structures such as graphene act as nucleating agents to increase the crystallinity of polymers. On the other hand, the embedded nanoparticles and their aggregates hinder the movement of polymer chains and, thus, inhibit spherulite growth . Therefore, the crystallinity of composite films is dependent on the kind and content of nanoparticles and on the interactions between nanoparticles and polymer chains.…”

Section: Resultsmentioning

confidence: 99%

Graphene oxide–polyoctahedral silsesquioxane–chitosan composite films with improved mechanical and water‐vapor‐transport properties

Xie

Liu

et al. 2019

J of Applied Polymer Sci

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Graphene oxide (GO) and ball‐milled maleamic acid–isobutyl polyoctahedral silsesquioxanes (MAIPSs) were incorporated simultaneously into chitosan (CS) via solution blending to evaluate their combined effects on the structures and properties of composite films. GO and MAIPS aggregates were homogeneously dispersed in CS and affected the crystallinities of the composite films. The binary addition of GO and MAIPS resulted in synergistic enhancements of the tensile strength and elongation at break of the composite films. Composite films containing 3% w/w MAIPS and 0.25% w/w GO (CS–GO–MAIPS‐3) exhibited the highest strength and modulus, which were 48 and 42.2% higher, respectively, than the values of the CS film. The water‐vapor‐sorption isotherms revealed that monolayer sorption sites decreased with the addition of GO or/and MAIPS, but the dissolution process was not significantly influenced. The water‐vapor permeability reached its lowest value for the CS–GO–MAIPS‐3 film because of hindered diffusion with the presence of impermeable nanoparticles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47748.

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Influence of graphene nanoplatelet incorporation and dispersion state on thermal, mechanical and electrical properties of biodegradable matrices

Cited by 59 publications

References 63 publications

Preparing the Degradable, Flame-Retardant and Low Dielectric Constant Nanocomposites for Flexible and Miniaturized Electronics with Poly(lactic acid), Nano ZIF-8@GO and Resorcinol Di(phenyl phosphate)

Preparing the Degradable, Flame-Retardant and Low Dielectric Constant Nanocomposites for Flexible and Miniaturized Electronics with Poly(lactic acid), Nano ZIF-8@GO and Resorcinol Di(phenyl phosphate)

Understanding the Effects of In-Service Temperature and Functional Fluid on the Ageing of Silicone Rubber

Graphene oxide–polyoctahedral silsesquioxane–chitosan composite films with improved mechanical and water‐vapor‐transport properties

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