The enhanced thermal and mechanical properties of graphite foams with a higher crystallinity and apparent density

Kim, Jihyun; Lee, Hyung-Ik; Lee, Young-Seak

doi:10.1016/j.msea.2017.04.071

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Polyurethane is widely used in various industries for lightweight structural applications. It is due to its efficiency in production processes and direct application to the target [20][21][22][23]. In the formation process of solid PU foam, there is a material expansion process, which is the advantage of PU foam formation.…”

Section: Introductionmentioning

confidence: 99%

Excellent Hybrid Polyurethane-Graphite Filler Micro Powder as a Lightweight Structure

Nugroho,

Alandro,

Herianto

et al. 2023

J. Compos. Sci.

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Weight plays a significant role in the automotive and aerospace fields due to the demand of lightweight material structures. A lighter body in weight (BIW) and in structure can reduce fuel consumption, lessen emissions, and support the SDGs 9, 11, 12, and 13. Therefore, polyurethane (PU) foam is suitable for applications that require low weight. The characteristics of hybrid polyurethane-graphite micro were successfully evaluated in this study. Several tests have been used to characterize these structures, such as, compression, hardness, density, surface evaluation, and FTIR analysis. The results showed that the expansion and shrinkage variations lead to different shapes at specific ratios. Compression tests show that the highest value occurred at 0.84 kN, with a 4:1 ratio found in pure PU foam without any reinforcement. PU foam with 2% graphite filler showed the highest results at the 4:1 ratio with a value of 0.45 kN. Furthermore, the highest hardness test result was 37.7 SHD. Density testing indicates that the highest value is obtained from specimens with a 4:1 ratio of 0.077 g/cm3. FTIR testing reveals that adding graphite as a filler alters the chemical bonds during the formation of solid PU foam. Surface observations show that adding graphite as a filler influences the variation in material structure formation. All the evaluation has tended to conclude the present combination as suitable for lightweight structures applications.

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Section: Introductionmentioning

confidence: 99%

Excellent Hybrid Polyurethane-Graphite Filler Micro Powder as a Lightweight Structure

Nugroho,

Alandro,

Herianto

et al. 2023

J. Compos. Sci.

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“…Graphite is a typical example of a carbon material that has many advantages, such as high stability, corrosion resistance to acid/alkali and organic solvents, and the ability to withstand severe changes of temperature [13,14]. It is therefore often used as the hydrophobic oleophilic material for the oil-water separation.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon materials have significant applications in many industries, such as oil-water separation, membrane separation, micro-electronics and so on [ 10 , 11 , 12 ]. Graphite is a typical example of a carbon material that has many advantages, such as high stability, corrosion resistance to acid/alkali and organic solvents, and the ability to withstand severe changes of temperature [ 13 , 14 ]. It is therefore often used as the hydrophobic oleophilic material for the oil-water separation.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Study on the Effect of Surface Hydroxyl Groups on Three-Phase Wettability in Oil-Water-Graphite Systems

2017

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Abstract:In this paper, a hydroxylated graphite surface is generated as a hydrophilic oleophobic material for the application of oil-water separation, and the effects of hydroxyl density on the three-phase wettability are studied in oil-water-graphite systems. We analyze the adsorption of water molecules on the hydroxylated surfaces and obtain the relationship between water-oil-solid interfacial properties and the hydroxyl density, which results from the synthetic effects of the orientation of molecules and hydrogen bonds. With the increase of hydroxyl density, the water-solid contact angle first decreases rapidly, and then remains constant. The density of the hydrogen bond formed between hydroxyls and water molecules in the adsorption layer can explain the regularity of the three-phase wettability. The orientation of the water molecules in the adsorption layer shows insignificant variation, owing to the hydrogen bond network formed between the water molecules; thus, little change is observed in the hydrogen bond density in the adsorption layer.

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Functional Fillers Special Physical Properties

Wypych¹

2023

Functional Fillers

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The enhanced thermal and mechanical properties of graphite foams with a higher crystallinity and apparent density

Cited by 6 publications

References 22 publications

Excellent Hybrid Polyurethane-Graphite Filler Micro Powder as a Lightweight Structure

Excellent Hybrid Polyurethane-Graphite Filler Micro Powder as a Lightweight Structure

Molecular Dynamics Study on the Effect of Surface Hydroxyl Groups on Three-Phase Wettability in Oil-Water-Graphite Systems

Functional Fillers Special Physical Properties

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