Rheological investigation of carbon-based hybrid polyurethane nanocomposites with continuous networks

Jouibari, Iman Sahebi; Haddadi‐Asl, Vahid; Esmaeili, Ali; Shahsavari, Sobhan; Mohammadzadeh, Fatemeh; Gholami, Mahdi; Hatam, Alireza Mohammadi

doi:10.1007/s13726-019-00745-z

Cited by 5 publications

(10 citation statements)

References 29 publications

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“…These fillers mainly affect the microphase separation of composites from the following aspects: The microphase separation of PU composites is significantly affected by the number of polar functional groups on filler surface 64,65,67,77,81 . These groups can act as nucleation sites for HSs aggregation and HDs formation; fillers with rich functional groups can lead to the formation of more and smaller HDs and promote the microphase separation of PU composites 17,63,67,77,82,84 The entanglement between fibrous fillers and PU chains will reduce the flexibility of chain segments, affect the arrangement of HSs, and thus inhibit the microphase separation 17,65,77,83,85 …”

Section: Discussionmentioning

confidence: 99%

“…The particle size of the fillers affects the microphase separation of PU composites by affecting fillers' specific surface area and surface energy. Fillers with smaller particle sizes can provide a larger surface area for HSs aggregation and improve the interaction between filler and HSs, thus promoting the microphase separation of PU composites 17,21,22,84 The in situ polymerization also affects the microphase separation of composites.…”

Section: Discussionmentioning

confidence: 99%

“…The polarity of filler can affect the distribution of fillers and the formation of hydrogen bonds between PU chains 13–16 . The structure of the filler may affect the mobility and the arrangement of PU segments, and even the formation of hydrogen bonds 17–19 . The particle size of filler determines its specific surface area and affects its surface activity 20–22 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of fillers on the microphase separation in polyurethane composites: A review

Jiang,

Gao,

Wang

et al. 2023

Polymer Engineering & Sci

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The microphase separation behavior of polyurethane (PU) strongly affects its mechanical, thermal, electrical, and other functional properties. Adding fillers to change the degree of microphase separation (DPS) in PU is a convenient and efficient method. Although many scholars have tried to regulate the microphase separation of PU by adding fillers, there are still many controversies about the effect. In this review, we classify commonly used fillers into three categories according to their morphology: spherical fillers, fibrous fillers, and layered fillers, and summarize their effects on the microphase separation behavior of PU. We explore the similarities and differences in the mechanisms by which different fillers affect the microphase separation of PU, and find that the polarity, morphology, size of fillers, and preparation method have a significant impact on the degree of microphase separation in PU. The impact of microphase separation on the mechanical properties of PU has also been summarized to illustrate their close relationship. We hope that these summaries will provide some guidance for the development of new high‐strength and multifunctional PU composites.Highlights Summarized recent research progress on effect of common fillers on DPS of PU. Common fillers are classified into three categories based on their morphology. Common laws of the fillers impact on the DPS are classified and discussed. The close relationship between DPS and mechanical properties is reviewed. Provided information for high‐strength and multifunctional PU development.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of fillers on the microphase separation in polyurethane composites: A review

Jiang,

Gao,

Wang

et al. 2023

Polymer Engineering & Sci

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“…The thermodynamic and physicochemical incompatibilities between the hard and soft segments brings about microphase separation and turns the homogeneous polymer phase into the hard and soft segment rich phases. 29,30 The microphase separation in PU is mainly driven by the hydrogen bonding interactions between urethane groups of the hard segments. Microphase separation performs like physical crosslinking and microphase separated PU behaves like a crosslinked polymer.…”

Section: Polyurethanesmentioning

confidence: 99%

“…At high temperature, the hard and soft segments are mixed, however with the decrease of temperature, the thermodynamic incompatibility between the segments becomes pronounced. The thermodynamic and physicochemical incompatibilities between the hard and soft segments brings about microphase separation and turns the homogeneous polymer phase into the hard and soft segment rich phases 29,30 . The microphase separation in PU is mainly driven by the hydrogen bonding interactions between urethane groups of the hard segments.…”

Section: Polyurethanesmentioning

confidence: 99%

A review on electrically conductive polyurethane nanocomposites: From principle to application

Jafarzadeh,

Farzaneh,

Haddadi‐Asl

et al. 2023

Polymer Composites

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Polyurethanes (PUs) thanks to the occurrence of phase separation and biphasic structure prevail over other polymer matrixes for impregnation of conductive fillers and production of conductive composites. A number of carbonous fillers including carbon black, carbon fiber, carbon nanotube, graphite and its derivatives, and fullerene can be loaded into the PU matrixes to impart electrical conductivity. The properties of the carbonous fillers, the filler/PU interactions, and the method of compositing determine the conductive performance of the composite. It is possible to modulate the properties of the conductive PU composites and employ them for a number of electronic applications including but not limited to the strain sensors, electromagnetic interference shielding materials, supercapacitors, and tissue engineering scaffolds. In the present review, first, the distinctive properties of PU as a matrix of conductive composites have been discussed. Then, various carbon fillers loaded into the PU matrixes and their structural and conductive properties have been debated. Thereafter, the fabrication methods of the conductive composites as well as the influential parameters on the electrical properties of the composites have been reviewed to provide an insight into how fulfill a PU composite with the desired electrical performance. And finally, a number of applications of conductive PU composites have been put forward.Highlights Polyurethanes are very capable matrixes for conductive composites. Carbonous fillers can be loaded into the PU matrixes to impart conductivity. Conductive PU composites are employed for a number of electronic applications. Herein, properties, fillers, and applications of PU composites are reviewed.

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Preparation of intelligent magnetic halloysite nanotubes/polyurethane nanocomposites: The role of nanotube modification on the shape recovery rate

Mohammadzadeh

Haddadi‐Asl

Siavoshani

et al. 2022

Materials Research Bulletin

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Rheological investigation of carbon-based hybrid polyurethane nanocomposites with continuous networks

Cited by 5 publications

References 29 publications

Effect of fillers on the microphase separation in polyurethane composites: A review

Effect of fillers on the microphase separation in polyurethane composites: A review

A review on electrically conductive polyurethane nanocomposites: From principle to application

Preparation of intelligent magnetic halloysite nanotubes/polyurethane nanocomposites: The role of nanotube modification on the shape recovery rate

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