Creating poly(lactic acid)/carbon nanotubes/carbon black nanocomposites with high electrical conductivity and good mechanical properties by constructing a segregated double network with a low content of hybrid nanofiller

Kuang, Tairong; Zhang, Maolin; Chen, Feng; Fei, Yanpei; Yang, Jintao; Zhong, Mingqiang; Wu, Bozhen; Liu, Tong

doi:10.1007/s42114-022-00622-z

Cited by 98 publications

(40 citation statements)

References 50 publications

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“…In practical applications, mechanical properties are one of the most considerable characteristics of materials [ 42 ], and they are a major limitation for the engineering applications of segregated CPCs. Thus, it is of great significance to improve the mechanical properties of segregated CPCs [ 43 , 44 , 45 ]. To evaluate the potential applications for the composites, the mechanical performances of the PA6/612-GS composites were explored by using a tensile test.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

Gao¹,

Li²,

Kong³

et al. 2023

Polymers

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Segregated conductive polymer composites exhibit excellent electrical properties with a low percolation threshold. However, the mechanical properties of the segregated conductive polymer composites were always poor because the conductive fillers at the interfaces hinder polymer chain diffusion and thus lead to weak interfacial interaction between the conductive fillers and the polymer matrix. In this paper, polyamide-6 and polyamide-612 microspheres were synthesized via the in situ anionic ring opening of caprolactam and laurolactam. Segregated graphite sheets/polyamide-6(GS/PA6) and polyamide-612(PA612) composites with good mechanical properties were realized via high-pressure solid-phase compression molding. The microstructures of the composite samples were observed by scanning electron microscopy, which showed that the formation of a GS-conductive network at the PA6 granule interfaces in the segregated conductive structures and the adopting of PA612 considerably improved the interfacial adhesion of the composites. A superior impact strength of 5.1 kJ/m2 was achieved with 50 wt% PA612 loading owing to improvements in the interface compatibility between PA6 and GS. The composites possessed an ultralow percolation threshold, which was ascribed to the segregated network structure being successfully constructed inside the material. As for GS/PA6 composites, the combination of segregated GS-conductive networks achieved an ultralow percolation of 2.8 vol%. The percolation of 80PA6/20PA612-GS composites was slightly higher, measuring up to 3.2 vol%. Moreover, the thermal conductivity of the 80PA6/20PA612-GS composites increased from 0.26 to around 0.5 W/(m·K), which was 1.9 times larger than the pure polyamide.

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Section: Resultsmentioning

confidence: 99%

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

Gao¹,

Li²,

Kong³

et al. 2023

Polymers

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“…[103][104][105][106][107] These parameters cause a profound impact on the mechanical properties, thermal stability, dimensional stability, thermal insulation properties, and other special properties required by the application scenario (such as hydrophobic, filtration, gas barrier, and drug release) of the porous materials. [108][109][110] However, for PPMs, the crystallinity of Hc and Sc is also the main factor affecting their overall performance. [39,55,58,61,62] Sc crystals have stronger heat resistance than Hc crystals.…”

Section: Relationships Between Cell Structure and Properties Of Ppmsmentioning

confidence: 99%

Review on Cell Structure Regulation and Performances Improvement of Porous Poly(Lactic Acid)

Hou

Pan

Zhou

et al. 2023

Macromol. Rapid Commun.

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Recent advances in the cell structure regulation and performances improvement of porous poly(lactic acid) materials (PPMs) are systematically reviewed in this feature article. First, the typical processing methods, including template method, non‐solvent induced phase separation, freeze–drying, and supercritical CO2 foaming, of PPMs are introduced emphatically. Their various cell morphologies by different processing methods are summarized: finger–like, honeycomb–like, fiber–like, through cell, open cell, closed cell, ball–like, and flower–like. Meanwhile, the transformation among different cell morphologies as well as the changes in cell size and cell density, having impact on the performances, is described. Second, the influence of stereo–complex crystals on the cell structure of PPMs is emphatically reviewed. Furthermore, the relationships between cell structure and properties that includes mechanical properties, thermal stability, heat insulation, and hydrophobicity, are elaborated. Eventually, the issues of PPMs worthy of further study are discussed.

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“…[4][5][6][7] CPCs have been widely used in the electronics industry, such as electromagnetic interference (EMI) shielding, [8][9][10] sensors, 11,12 wearable electronic devices. 13,14 To achieve high electrical conductivity, researchers fabricate advanced CPCs by introducing conductive fillers such as carbon black, 15,16 graphite, 17,18 graphene, 19,20 carbon nanotube (CNT), 21,22 and carbon fiber 23 into the polymer matrix. However, the high content of conductive fillers will make the processing difficult, lead to high costs, and impair the mechanical properties of the matrix.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional starch/carbon nanotube composites with segregated structure: Electrical conductivity, electromagnetic interference shielding effectiveness, thermal conductivity, and electro‐thermal conversion

Mei

Zhao

Jiang

et al. 2023

J of Applied Polymer Sci

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Conductive polymer composites with segregated structure (s‐CPCs) are widely used in the electronics industry. Achieving selective distribution of the conductive fillers in the polymer matrix is an effective way to construct s‐CPCs. In this work, the starch was used as the matrix and the carbon nanotube (CNT) was used as the conductive fillers to fabricate multifunctional s‐CPCs, via simple mechanical mixing and compression molding. During the processing, the starch underwent partial gelatinization, which was conducive to the fusion of the starch granules and the selective distribution of the CNT. Scanning electron microscope and atomic force microscope images showed that the CNT was attached to the surface of the starch granules to form a segregated structure. The starch/CNT composites exhibited a significant percolation, with a percolation threshold of 0.24 vol%. When the CNT content was 3.05 vol%, the starch/CNT composites exhibited a high electromagnetic interference (EMI) shielding effectiveness of 33.12 dB, which was commercially applicable in EMI shielding devices. The starch/CNT composites also possess good thermal management properties and can be used as thermal conductors and electro‐thermal conversion devices. This work manifests the application prospect in the field of the electronics industry and broadens the application potential of starch.

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Creating poly(lactic acid)/carbon nanotubes/carbon black nanocomposites with high electrical conductivity and good mechanical properties by constructing a segregated double network with a low content of hybrid nanofiller

Cited by 98 publications

References 50 publications

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

Review on Cell Structure Regulation and Performances Improvement of Porous Poly(Lactic Acid)

Multifunctional starch/carbon nanotube composites with segregated structure: Electrical conductivity, electromagnetic interference shielding effectiveness, thermal conductivity, and electro‐thermal conversion

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