Synthesis and characterization of exfoliated polystyrene grafted hexagonal boron nitride nanosheets and their potential application in heat transfer nanofluids

Salehirad, Mehdi; Nikje, Mir Mohammad Alavi

doi:10.1007/s13726-017-0535-z

Cited by 12 publications

(8 citation statements)

References 45 publications

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“…It is worth to mention that, most commercial HIPSs with polybutadiene modifier have tensile strength, modulus, and impact strength in the range 24–28 MPa, 1.8–2.2 GPa, and 80–110 J/m, respectively . As is clear, the reported range for impact strength is much higher than the values we obtained in our study, because of the different manufacturing processes the products have experienced.…”

Section: Resultscontrasting

confidence: 65%

“…HIPS has many benefits compared to pristine polystyrene such as improved mechanical properties, impact resistance, and processability . Significant applications of HIPS products include containers, packaging, housewares, toys, and so on . In some applications, this polymer may fail due to insufficient impact strength, poor mechanical properties, and low thermal stability .…”

Section: Introductionmentioning

confidence: 99%

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Effects of the molecular weight and CC functionality of poly 1‐hexene on the properties of poly 1‐hexene‐based high impact polystyrene

Hanifpour

Bahri‐Laleh

2018

J of Applied Polymer Sci

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Here we are aimed to unravel the effects of C C functionality and molecular weight of the rubber on the final properties of poly1-hexene-based high impact polystyrenes (HIPS). In this regard, various HIPS samples were synthesized by free radical polymerization of styrene in the presence of different weight fractions of various poly1-hexene-based impact modifiers including: (i) high molecular weight poly1-hexene (PHex), (ii) low molecular weight poly1-hexene (Olig), and (iii) 1-hexene/1,5-hexadiene copolymer (Copolym). Results showed that by increasing C C functionality from PHex to Oligm and Copoly, the degree of grafting increases which has its influence on the mechanical, thermal and morphological perspectives of the synthesized HIPSs. Besides C C unsaturation degree, the effect of rubber molecular weight on the final HIPS properties was studied as well. According to the results, molecular weight has significant effect on the final HIPS performance, too. Finally, our obtained results suggest new HIPS/Copolym sample as the one with the highest mechanical and thermal properties which is comparable well with commercial HIPS/polybutadiene grades.

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Section: Resultscontrasting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Effects of the molecular weight and CC functionality of poly 1‐hexene on the properties of poly 1‐hexene‐based high impact polystyrene

Hanifpour

Bahri‐Laleh

2018

J of Applied Polymer Sci

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“…The layers can be further hydroxylate by carrying out a series of post-treatments under acid, alkali, oxidant, etc. [82][83][84][85][86][87][88]. Figure 10a shows a strategy to functionalize h-BNNSs via two synthesis steps [82].…”

Section: Other One-pot Routesmentioning

confidence: 99%

Hydroxylated boron nitride materials: from structures to functional applications

2020

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Functionalization of boron nitride (BN) materials with hydroxyls has attracted great attention to accomplish better performances at micro- and nanoscale. BN surface hydroxylation, in fact, induces a change in properties and allows expanding the fields of application. In this review, we have summarized the state-of-the-art in developing hydroxylated bulk and nanoscale BN materials. The different synthesis routes to develop hydroxyl BN have been critically discussed. What emerges is the great variety of possible strategies to achieve BN hydroxylation, which, in turn, represents one of the most suitable methods to improve the solubility of BN nanomaterials. The improved stability of BN solutions creates conditions for producing high-quality nanocomposites. Furthermore, new interesting optical and electronic properties may arise from the functionalization by OH groups as displayed by a wide range of both theoretical and experimental studies. After the presentation of the most significant systems and methodologies, we question of future perspective and important trends of the next generation BN materials as well as the possible areas of advanced research. Graphical abstract Hydroxyl functionalization of boron nitride materials is a key method to control and enhance the properties and design new functional applications.

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“…As the surface wettability of a typical film depends on the chemical composition and topography, hydrophobic/oleophilic properties are applied to tune porous surfaces for achieving enough roughness. PS-based nanofibers are emerged as good choices for effective oil-water separation, especially when modified nanomaterials are embedded within [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…It is also reported that the boron nitride nanotubes aligned in specific directions enhanced the surface roughness and non-wettability [21]. However, in hBN-filled polymers, the filler-polymer interfacial interaction and dispersibility are major issues to be considered and proper surface modification (chemical/physical) is necessary to achieve maximum efficiency for nanocomposite properties [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

White Graphene-Cobalt Oxide Hybrid Filler Reinforced Polystyrene Nanofibers for Selective Oil Absorption

et al. 2019

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In this work, stable hydrophobic nanocomposites are made from electrospun fibers of polystyrene (PS) containing a hybrid filler combination of (i) hexagonal boron nitride (hBN) and (ii) cobalt oxide (Co3O4) nanomaterials. Good synergistic interaction is observed between the nanomaterials, since the growth of Co3O4 was carried out in presence of white graphene nanosheets. Filler synergy modifies the PS surfaces, by enhancing the filler-polymer interfacial interactions and provides good tensile strength. The hydrophobic films are gamma irradiated to improve crosslinking within the polymer nanocomposites. Since gamma irradiation enhances the surface roughness, its hydrophobicity/oleophilicity increases much and the final nanofibers show good oil-water separation efficiency. The nanofibers act as sponge clothing to skim the oil from a mixture of oil and water. Durability of the fibers in hot water and in presence of ultrasonic waves is also tested and good response is achieved. Contact angle studies are performed to investigate the surface properties and to check the influence of gamma irradiation on the surface wettability. The gamma-irradiated PS nanocomposite fiber shows a contact angle of 152° ± 2° compared to the 140° ± 1° of the neat PS fiber, evidencing the superhydrophobicity. Both the effects of crosslink density enhancement and hybrid filler distribution make the composite fibers stronger in oil absorption application even at higher operation temperatures. The fibers are reported to be robust and durable, in addition.

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Synthesis and characterization of exfoliated polystyrene grafted hexagonal boron nitride nanosheets and their potential application in heat transfer nanofluids

Cited by 12 publications

References 45 publications

Effects of the molecular weight and CC functionality of poly 1‐hexene on the properties of poly 1‐hexene‐based high impact polystyrene

Effects of the molecular weight and CC functionality of poly 1‐hexene on the properties of poly 1‐hexene‐based high impact polystyrene

Hydroxylated boron nitride materials: from structures to functional applications

White Graphene-Cobalt Oxide Hybrid Filler Reinforced Polystyrene Nanofibers for Selective Oil Absorption

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