Nucleating agents based on graphene and graphene oxide for crystallization of the β-form of isotactic polypropylene

Broda, Jan; Bączek, Marcin; Fabia, Janusz; Biniaś, Dorota; Fryczkowski, Ryszard

doi:10.1007/s10853-019-04045-y

Cited by 29 publications

(20 citation statements)

References 66 publications

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“…Due to these bonds, particles of calcium pimelate are attached to the surface of reduced graphene oxide. Formation of permanent bonds was confirmed in previous investigations [35].…”

Section: Discussionsupporting

confidence: 84%

“…Due to its specific surface geometry, calcium pimelate is well known as efficient nucleating agent promoting growth of the β-iPP [30]. Previous investigations revealed that calcium pimelate connected with the surface of rGO initiates the growth of the β-form crystals and promotes formation of structure with a considerable amount of the β-iPP [35]. This ability of the rGO-CP is clearly manifested in gravity spun fibers.…”

Section: Discussionmentioning

confidence: 99%

“…More details on the reagent's concentration and the parameters of particular treatments during oxidation, reduction, and functionalization are presented in previous papers [35,38]. In the first stage, oxidation of the graphite powder was performed.…”

Section: Preparation Of Functionalized Reduced Grapheme Oxidementioning

confidence: 99%

“…In our previous investigations, calcium pimelate was attached to the surface of GO and rGO [35]. During examinations, the compounds were characterized and their nucleating ability in the quiescent state by non-isothermal crystallization of isotactic polypropylene was confirmed.…”

Section: Introductionmentioning

confidence: 97%

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Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

et al. 2020

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An effective β-nucleating agent for polypropylene crystallization was obtained by the functionalization of reduced graphene oxide with calcium pimelate. The nucleating ability of the modified reduced graphene oxide (rGO-CP) was confirmed during non-isothermal crystallization. In further examinations, the rGO-CP was used as an additive to modify polypropylene fibers. The fibers were extruded in laboratory conditions. Gravity spun fibers containing three different concentrations of the rGO-CP and fibers taken at three different velocities were obtained. The supramolecular structure of the fibers was examined by means of calorimetric and X-Ray Scattering methods (DSC, WAXS, and SAXS). The considerable amount of β-iPP was obtained only in the gravity spun fibers. In the fibers extruded at higher velocities, the diminishing impact of the additive on the fibers structure was revealed. The changes observed in the fiber structure in connection with the impact of the additive on polypropylene crystallization was discussed.

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“…Due to these bonds, particles of calcium pimelate are attached to the surface of reduced graphene oxide. Formation of permanent bonds was confirmed in previous investigations [35].…”

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Preparation Of Functionalized Reduced Grapheme Oxidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

et al. 2020

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“…Graphene oxide was prepared from graphite using a modified Hummers method, and reduced graphene oxide was prepared by the low-temperature thermal reduction. Both procedures were described by the authors in earlier publications [ 29 , 30 ], and details are provided in Supplementary Materials .…”

Section: Methodsmentioning

confidence: 99%

The Role of Reduced Graphene Oxide in the Suspension Polymerization of Styrene and Its Effect on the Morphology and Thermal Properties of the Polystyrene/rGO Nanocomposites

et al. 2020

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Reduced graphene oxide (rGO) was used to obtain Polystyrene (PS)/rGO nanocomposites via in-situ suspension polymerization. The main goal of the article was to determine how rGO influences the morphology and thermal properties of PS beads. The obtained samples were studied by means of a scanning electron microscope (SEM), and calorimetric and thermogravimetric analysis (DCS, TGA). It was proven that the addition of rGO, due to the presence of polar functional groups, causes significant changes in bead sizes and size distribution, and in their morphology (on the surface and in cross-section). The increasing amount of rGO in the polymer matrix increased the size of beads from 0.36 to 3.17 mm for pure PS and PS with 0.2 wt% rGO content, respectively. PS/rGO nanocomposites are characterized by distinctly improved thermostability, which is primarily expressed in the increase in their decomposition temperature. For a sample containing 0.3 wt% rGO, the difference is more than 12 °C in comparison to pure PS beads.

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Graphene Functionalization of Polyrotaxane‐Encapsulated PEG‐Based PCMs: Fabrication and Applications

Yin,

Yang,

López

et al. 2023

Adv Materials Technologies

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Phase change materials (PCMs) have received much attention regarding the thermal regulation of electronic devices. However, the main limitations of using organic PCMs are the low thermal conductivity and leakage during the phase change process. This work aims to improve these limitations to increase the thermal conductivity of the leakage‐proof PCM formed by a polyrotaxane that serves as a support material to encapsulate PEG. For this purpose, different contents of graphene nanoplatelets (GNP) are blended. To facilitate its postindustrial production and to meet ecological standards, the synthesis of this PCM is simple and only using water as a solvent. The PCMs can be thermally processed conveniently by a hot press. Furthermore, the PCMs achieve high enthalpy values (132.9–142.9 J g−1) due to the action of GNPs as thermally conductive fillers. The PCMs exhibited an increase of 60–257% in thermal conductivity values with higher GNP content, and show great shape stability and no leakage during phase change. These improvements solve the main problems of organic PCMs, thus making PLR‐PEG‐GNP‐based materials a good candidate for use as thermal energy storage materials in industrial applications as thermoregulators of solid‐state disks or realizing the “shaving peaks and filling valleys” effect for thermoelectric generators.

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Nucleating agents based on graphene and graphene oxide for crystallization of the β-form of isotactic polypropylene

Cited by 29 publications

References 66 publications

Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

The Role of Reduced Graphene Oxide in the Suspension Polymerization of Styrene and Its Effect on the Morphology and Thermal Properties of the Polystyrene/rGO Nanocomposites

Graphene Functionalization of Polyrotaxane‐Encapsulated PEG‐Based PCMs: Fabrication and Applications

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