Graphene oxide dispersion state in polystyrene-based composites below percolation threshold via linear melt rheology

Dessi, Claudia; Amurin, Leice G.; Muñoz, Pablo; Oliveira, Yuri D. C. de; Fechine, Guilhermino J. M.; Andrade, Ricardo

doi:10.1007/s00397-021-01263-7

Cited by 5 publications

(3 citation statements)

References 65 publications

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“…Slight increases in G 0 and G 00 values were observed compared to homo PP for each composite specimen since GO particles are capable to slow down the relaxation process of linear polymer chains. 19 The loss modulus showed higher values than the storage modulus in the low-frequency region meaning that at low frequencies, the materials exhibited liquid-like behavior. However, as the frequency increased, the materials started to react more elastic, and the storage modulus started to increase.…”

Section: The Effect Of Go Types On the Rheological Behavior Of Pp Com...mentioning

confidence: 95%

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An efficient interface model to develop scalable methodology of melt processing of polypropylene with graphene oxide produced by an improved and eco‐friendly electrochemical exfoliation

Dündar

Okan

2022

J of Applied Polymer Sci

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This study developed a scalable and straightforward adaptation methodology for melt processing of polypropylene (PP) to provide a high degree of exfoliation of multilayer graphene oxide (GO) by using a high-shear mixer. GO was first produced by an improved and eco-friendly electrochemical exfoliation by using an environmentally friendly aqueous methanesulfonic acid (MSA) and a sodium sulfate salt system to minimize the environmental impact. The produced GOs then were melt blended with PP and their mechanical, thermal, and morphological properties were investigated under different GO loadings to attain ideal configuration and increase interfacial interactions between polymer matrix and reinforcer. Comparisons were made by producing different PP composites using two different GO types produced in salt and acid environments. Additionally, by applying different voltages to salt system, the effect of applied voltage on the properties of both GO material and the composites were discussed. The characterization results indicated that GO obtained in MSA solution caused a 71% increase in flexural modulus and 46% in flexural strength with the addition of 1 wt% GO. The rheological characterization also showed that dispersion and viscosity improved with lower GO loadings compared to neat polymer by providing cost-effective and scalable graphene manufacturing.

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Section: The Effect Of Go Types On the Rheological Behavior Of Pp Com...mentioning

confidence: 95%

“…18 Using GO instead of pristine graphene in composite applications generally characterized by good particle dispersion degree. 19 Additionally, it may provide advantages such as preventing aggregation and facilitating modification of GO. There are different methods to produce GOs, and Hummers' method is one of the most widely used ones.…”

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confidence: 99%

An efficient interface model to develop scalable methodology of melt processing of polypropylene with graphene oxide produced by an improved and eco‐friendly electrochemical exfoliation

Dündar

Okan

2022

J of Applied Polymer Sci

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“…45,46 This behaviour can be ascribed to the rupture of filler agglomerates and the consequent aggregate-aggregate slippage at increasing shear rates. 47 The viscosity of composites is indeed directly related to the nature, the content and the dimension of included filler, due to energy dissipation through the sliding and squeezing motion of the melt between the particles and the particle-particle interactions. 48 Moreover, the filler dispersion plays a crucial role in determining the rheological behaviour.…”

Section: Thermal Rheological Mechanical and Morphological Properties ...mentioning

confidence: 99%

Oleylamine functionalization of boron nitride nano-platelets for Polyamide-6 thermally conductive injection moulded composites

Bragaglia

Paleari

Lamastra

et al. 2022

Journal of Thermoplastic Composite Materials

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Boron nitride nano-platelets have been functionalized with oleylamine using a simple method without ultrasonication. The functionalization is effective with the formation of a coordination bonds between the boron nitride nano-platelets and the oleylamine molecules. The oleylamine functionalization allows for the production of 25% by weight loaded polyamide 6 – boron nitride composites having higher mechanical properties (15% tensile strength increase) and better through-plane thermal conductivity (0.85 to 0.99 W/m·K) with respect to the untreated samples. A better particle-matrix interaction is confirmed by SEM imaging and rheological analysis. The injection moulding process determines a filler orientation which influences the thermal conductivity.

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Rheological behaviors of the multi-wall carbon nanotubes/polyethylene composites prepared by a master batch method

Zhang,

He,

Xiao

2024

Fullerenes, Nanotubes and Carbon Nanostructures

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Graphene oxide dispersion state in polystyrene-based composites below percolation threshold via linear melt rheology

Cited by 5 publications

References 65 publications

An efficient interface model to develop scalable methodology of melt processing of polypropylene with graphene oxide produced by an improved and eco‐friendly electrochemical exfoliation

An efficient interface model to develop scalable methodology of melt processing of polypropylene with graphene oxide produced by an improved and eco‐friendly electrochemical exfoliation

Oleylamine functionalization of boron nitride nano-platelets for Polyamide-6 thermally conductive injection moulded composites

Rheological behaviors of the multi-wall carbon nanotubes/polyethylene composites prepared by a master batch method

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