Polyimide composite films reinforced by graphene quantum dots

Wang, Yongbo; Shang, Mingpeng; Wang, Yuxia; Cui, Bowen; Qiu, Zhijie; Li, Hui; Wang, Yanxiang

doi:10.1080/1536383x.2021.2011237

Cited by 10 publications

(5 citation statements)

References 38 publications

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“…In this method, PI monomers are first thoroughly mixed with additives such as reinforcing agents and fillers and then polymerization occurs at high temperatures to form PI composites (Ma et al , 2017). It has been reported that a nanocomposite film comprising of graphene quantum dots and PI via in situ polymerization, exhibiting remarkable mechanical properties (Wang et al , 2021). As the amount of graphene quantum dots was increased, the thermal stability of the PI compound film showed a corresponding enhancement.…”

Section: Preparation Of Polyimide and Its Compositesmentioning

confidence: 99%

Review of tribological properties of polyimide-based composite materials

Yan

Zhang

Wang

2023

ILT

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Purpose As a high-performance engineering plastic, polyimide (PI) is widely used in the aerospace, electronics and automotive industries. This paper aims to review the latest progress in the tribological properties of PI-based composites, especially the effects of nanofiller selection, composite structure design and material modification on the tribological and mechanical properties of PI-matrix composites. Design/methodology/approach The preparation technology of PI and its composites is introduced and the effects of carbon nanotubes (CNTs), carbon fibers (CFs), graphene and its derivatives on the mechanical and tribological properties of PI-based composites are discussed. The effects of different nanofillers on tensile strength, tensile modulus, coefficient of friction and wear rate of PI-based composites are compared. Findings CNTs can serve as the strengthening and lubricating phase of PI, whereas CFs can significantly enhance the mechanical properties of the matrix. Two-dimensional graphene and its derivatives have a high modulus of elasticity and self-lubricating properties, making them ideal nanofillers to improve the lubrication performance of PI. In addition, copolymerization can improve the fracture toughness and impact resistance of PI, thereby enhancing its mechanical properties. Originality/value The mechanical and tribological properties of PI matrix composites vary depending on the nanofiller. Compared with nanofibers and nanoparticles, layered reinforcements can better improve the friction properties of PI composites. The synergistic effect of different composite fillers will become an important research system in the field of tribology in the future.

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Section: Preparation Of Polyimide and Its Compositesmentioning

confidence: 99%

Review of tribological properties of polyimide-based composite materials

Yan

Zhang

Wang

2023

ILT

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“…At last, the elongation at break of the FCPI-0.1, FCPI-0.3, FCPI-0.5, FCPI-0.75, FCPI-1 composite films were about 14.86%, 15.82%, 11.55%, 10.28%, and 7.89%, respectively. The limited elongation may be due to the weak interaction between FC and PI, and the presence of certain defects that lead to phase separation, [35][36][37] it can also be seen from the SEM results.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Low‐dielectric and low‐temperature curable fluorinated nano carbon/polyimide composites with 6‐aminoquinoline for end capping

Zhang

Sui

et al. 2022

Polymer Composites

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One challenge in the high-performance dielectric material of polyimide (PI) is to obtain the excellent comprehensive properties at low curing temperature for advanced IC package. In this work, 6-aminoquinoline (AQL) is introduced through covalent bonds for end capping to obtain a low-temperature curable PI at first. The results demonstrate that with very limited introduce (2.76%) of AQL, the imidization index could reach as high as 1.01 at 200 C. Then, fluorinated nano carbon (FC) is further introduced resulting in the fluorinated nano carbon/polyimide (FCPI) composites, which effectively reduces the dielectric constant (1 wt%, 2.75 @ 1 MHz). Besides, the as-prepared FCPIs also possess excellent thermal property of which FCPI-0.3 exhibited the 5% weight loss temperature of 540 C and the glass transition temperature is also as high as 385 C. Furthermore, the tensile strength of the film is 127 MPa, the elongation at break is around 15.82%, and the Youngs' modulus is about 3.10 GPa proving the superior mechanical property. As a result, the successful preparation of the FCPI nanocomposites not only possess low-temperature curing and lowdielectric performance but also exhibit excellent thermal and mechanical properties, which shows a wide range of application prospects in the field of microelectronics for the advanced electronic package.advanced electronic packaging, low dielectric constant, low temperature curing, polyimide | INTRODUCTIONWith the rapid development of microelectronic industry, electronic components tend to be miniaturized and chip interconnection density has also increased sharply. [1][2][3] Fan-out wafer-level packaging (FOWLP) has been one of the latest packaging forms with the ultrathin redistribution layer (RDL) and higher I/O density. [4,5] Thereinto, polyimide (PI) has become one of the most important dielectronic materials in RDL with superior thermal, mechanical property, low dielectronic constant and high chemical resistance and adhesion on various substrates. [6][7][8] However, new requirements have been appeared with the upcoming applications of 5G, AI, automate drive, internet of Jialin Zhang and Yuying Sui contributed equally to this study.

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“…They discovered that when GQDs were doped with 0.5 wt%, the composite films' tensile strength and elastic modulus increased by 41.3% and 108%, respectively, compared to the pure polyimide films [25]. To increase the mechanical strength of porous organic polymers, Huang et al investigated the possibility of using GQDs.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of carbon fibers: γ-irradiation induced microporous modulation and surface defect repairing with graphene quantum dots

Shao,

Zhou,

Wang

et al. 2024

J. Phys. D: Appl. Phys.

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Due to the presence of numerous defects both internally and on the surface, carbon fiber exhibits mechanical properties far below theoretical predictions. Finding a rapid and effective method for reinforcing the matrix remains a challenge. To address this, we have conducted structural reinforcement of carbon fiber by improving the orientation of internal micropores and eliminating surface defects. On the one hand, we subjected the carbon fiber to a dose of 100 kGy of gamma-ray irradiation in the air. After testing, the mechanical properties of the carbon fiber improved by 5.59 %. Analysis using techniques such as Small-angle X-ray scattering (SAXS) revealed that gamma rays can slightly alter the orientation of the fiber’s internal micropores and enhance graphitization to some extent. On the other hand, we introduced graphene quantum dots (GQDs) onto the surface of the carbon fiber using electrostatic spraying and electrophoretic deposition techniques to fill the defect sites. Compared to untreated carbon fiber, the mechanical properties improved by 10.65 % and 9.40 % when GQDs were grafted using electrophoretic deposition and electrostatic spraying methods, respectively. This improvement can be attributed to the adsorption of GQDs on the surface of the carbon fiber, which disperses stress during tensile loading and delays fracture. Finally, grafting of GQDs onto the surface of gamma-irradiated carbon fibers by electrophoresis improved the mechanical properties of the carbon fibers by 15.53% compared to unmodified carbon fibers. This work provides a more comprehensive perspective for repairing carbon fiber structures.

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Polyimide composite films reinforced by graphene quantum dots

Cited by 10 publications

References 38 publications

Review of tribological properties of polyimide-based composite materials

Review of tribological properties of polyimide-based composite materials

Low‐dielectric and low‐temperature curable fluorinated nano carbon/polyimide composites with 6‐aminoquinoline for end capping

Reinforcement of carbon fibers: γ-irradiation induced microporous modulation and surface defect repairing with graphene quantum dots

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