Thermally conductive fillers

Han, Yixin; Guo, Yue; Gu, Junwei

doi:10.1016/b978-0-323-95231-6.00002-7

Cited by 4 publications

(3 citation statements)

References 141 publications

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“…where W W is the weight of the wet membrane, W d is the weight of the dry membrane, ρ k is the kerosene density (0.81 g•cm −3 ), and ρ m is the density of the membrane material estimated from the PVDF (1.8 g•cm −3 ) [48], GO (1.9 g•cm −3 ) [49] and CB (2.3 g•cm −3 ) [50] densities. Three measurements were performed for each membrane to calculate the average values and standard deviations of the porosities.…”

Section: Membrane Characterizationmentioning

confidence: 99%

Environmentally Friendly Photothermal Membranes for Halite Recovery from Reverse Osmosis Brine via Solar-Driven Membrane Crystallization

Aquino,

Santoro,

Politano

et al. 2024

Membranes

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Modern society and industrial development rely heavily on the availability of freshwater and minerals. Seawater reverse osmosis (SWRO) has been widely adopted for freshwater supply, although many questions have arisen about its environmental sustainability owing to the disposal of hypersaline rejected solutions (brine). This scenario has accelerated significant developments towards the hybridization of SWRO with membrane distillation–crystallization (MD-MCr), which can extract water and minerals from spent brine. Nevertheless, the substantial specific energy consumption associated with MD-MCr remains a significant limitation. In this work, energy harvesting was secured from renewables by hotspots embodied in the membranes, implementing the revolutionary approach of brine mining via photothermal membrane crystallization (PhMCr). This method employs self-heating nanostructured interfaces under solar radiation to enhance water evaporation, creating a carefully controlled supersaturated environment responsible for the extraction of minerals. Photothermal mixed matrix photothermal membranes (MMMs) were developed by incorporating graphene oxide (GO) or carbon black (CB) into polyvinylidene fluoride (PVDF) solubilized in an eco-friendly solvent (i.e., triethyl phosphate (TEP)). MMMs were prepared using non-solvent-induced phase separation (NIPS). The effect of GO or GB on the morphology of MMMs and the photothermal behavior was examined. Light-to-heat conversion was used in PhMCr experiments to facilitate the evaporation of water from the SWRO brine to supersaturation, leading to sodium chloride (NaCl) nucleation and crystallization. Overall, the results indicate exciting perspectives of PhMCr in brine valorization for a sustainable desalination industry.

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Section: Membrane Characterizationmentioning

confidence: 99%

Environmentally Friendly Photothermal Membranes for Halite Recovery from Reverse Osmosis Brine via Solar-Driven Membrane Crystallization

Aquino,

Santoro,

Politano

et al. 2024

Membranes

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“…Therefore, polypropylene composite materials with high thermal conductivity, which have many advantages such as corrosion resistance, scale inhibition, easy processing, and low cost, have become a research hotspot in this field. They are considered an ideal material to replace stainless steel, enamel, graphite, glass in the fields of chemical, pharmaceutical, dyeing, metallurgy, new energy, and seawater desalination treatment to manufacture heat exchangers and condensers [1][2][3][4][5][6]. At present, the thermal conductivity of this type of thermal conductive composite material in China is not high, especially in the process of processing and forming, where graphite is prone to form a single horizontal orientation, resulting in a higher radial thermal conductivity, while the axial (vertical) thermal conductivity is generally not high, and even increasing the thermal anisotropy, thereby limiting the application in heat exchange technology.…”

Section: Introductionmentioning

confidence: 99%

Study on Polypropylene Composites with High Thermal Conductivity and Its Preparation

Zhou,

Zhang

et al. 2023

E3S Web Conf.

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Polypropylene (PP) composite materials were prepared through two molding methods of injection and compression molding, taking PP, FG as the matrix and thermal conductive filler. The effects of molding methods and FG content on the thermal conductivity of composite materials were studied, and the SEM, XRD, and thermal expansion properties of the materials were further analyzed. Results showed that thermal conductivity of the composite material increases with increasing of the FG content. When the FG content was 75 wt%, the average thermal conductivity of the composite materials prepared by injection molding and compression molding is 9.88 W·m-1·K-1 and 6.03 W·m-1·K-1, respectively. The axial thermal conductivity is 16.6 W·m-1·K-1 and 1.35 W·m-1·K-1, and the radial thermal conductivity is 5.88 W·m-1·K-1 and 26.9 W·m-1·K-1, respectively. In composite materials formed by injection molding, the flaky FG is mainly oriented vertically, while in compression molding, the flaky FG is mainly oriented horizontally.

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“…Compared with metal materials, polymer-based thermal conductive composites have the advantages of corrosion resistance, lower cost, and easiier processing. As a result, there is an urgent need for researchers to develop polymer-based thermally conductive composites that offer excellent performance [1][2][3][4][5][6]. In order to achieve thermal conductivity comparable to that of metallic materials, the construction of a complete thermal conduction path within the material is crucial for polymer-based thermal composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of High Thermal Conductivity Polypropylene-based Composites

Zhou,

Zhang,

Bai

et al. 2023

TETR

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Polypropylene-based composites with high thermal conductivity were obtained by pressure injection molding using a hybrid form of PP as the matrix and FG as the thermally conductive filler with a particle size of 37 µm. Microscopic morphologies of the material were examined by SEM to determine the effect of FG content on the thermal conductivity and mechanical properties of the composites. The study found a clear correlation between the thermal conductivity of the composites and the FG content. The research confirmed a direct link between the thermal conductivity of the composites and FG content. At 70 wt%, the material demonstrated the greatest average, axial, and radial thermal conductivity of 7.52 W·m-1·K-1, 12.6 W·m-1·K-1, and 4.50 W·m-1·K-1, respectively. However, any subsequent increase in fractional gradient (FG) content resulted in a decrease in the strength and modulus of the material. The highest tensile and flexural strength values of 34.9 and 63.7 MPa respectively, were achieved when the FG content was 60 wt%. At this particular FG content, the tensile and flexural modulus also reached 9.78 and 10.7 gigapascals (GPa), respectively. As the FG content increased, the strain on the composite material decreased. Note that the maximum tensile and flexural strains were measured at 50 wt% FG content, with values of 0.77% and 0.79%, respectively. The glass fiber sheets in the injection molded composites were uniform and predominantly vertically oriented.

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Thermally conductive fillers

Cited by 4 publications

References 141 publications

Environmentally Friendly Photothermal Membranes for Halite Recovery from Reverse Osmosis Brine via Solar-Driven Membrane Crystallization

Environmentally Friendly Photothermal Membranes for Halite Recovery from Reverse Osmosis Brine via Solar-Driven Membrane Crystallization

Study on Polypropylene Composites with High Thermal Conductivity and Its Preparation

Preparation and Performance of High Thermal Conductivity Polypropylene-based Composites

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