Surfactant assisted and in situ formed micro liquid metal as excellent lubricant additive in polyimide coating

Dong, Lisong; Wu, Jian; Cao, Danyang; Feng, Xinliang; Zhu, Jiahua; Lü, Xiaohua; Mu, Liwen

doi:10.1016/j.triboint.2021.106953

Cited by 9 publications

(17 citation statements)

References 55 publications

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“…This is mainly because the surface properties of LM and GO are different, and they attracted each other, thus decreasing the aggregation state of LM 39 . The reduction of filler agglomeration in the matrix is beneficial to improve the wear resistance of the coating 18 …”

Section: Resultsmentioning

confidence: 99%

“…39 The reduction of filler agglomeration in the matrix is beneficial to improve the wear resistance of the coating. 18 be seen from Figure 2A that there was an obvious small peak (150-350 nm) in the LM@GO, which meant the GO could decrease the size of the pure LM. In addition, the main peak of LM@GO moved toward the larger size direction as compared with LM, which could be attributed to the original size of GO.…”

Section: Morphologymentioning

confidence: 99%

“…39 And the LM balls were gradually worn out in the process of reciprocating friction, and then a layer of LM tribo-film was formed on the surface of steel balls. 18 At the same time, flaky GO debris also entered the tribo-film, which played a role of mechanical support, which improved the mechanical properties of the lubricating film to a certain extent. 45 The synergistic effect of them formed a tribo-film with both lubrication and wear resistance, which greatly improved the wear resistance of the composite coating.…”

Section: Mechanism Of Friction and Wearmentioning

confidence: 99%

“…The LM based tribofilm can be formed during the friction process due to the slow release of gallium-based liquid metal from the solid materials, which greatly improves the tribological performance of the material. 18 However, there are still some problems when LM is added into solid materials. Its surface tension is large, so there is obvious agglomeration in the matrix.…”

Section: Introductionmentioning

confidence: 99%

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Synergistic dispersion and tribo‐film formation of liquid metal @graphene oxide/epoxy coating: Toward improved mechanical and anti‐wear properties

et al. 2023

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A series of epoxy composite coatings filled with liquid metal (LM) and graphene oxide (GO) are successfully prepared as the self-lubricating material in this work. The dispersion of LM and GO (LM@GO) in epoxy coating and its effect on the thermal, tribological, and mechanical properties of epoxy coating are systematically studied by using thermogravimetric analysis, differential scanning calorimetry, mechanical and friction, and wear tester. The LM@GO filler has been proved to be an effective composite filler, which can be uniformly dispersed in epoxy coating, reduce the wear volume, and improve its mechanical properties of epoxy coating. When the filler content is 0.5 wt% LM and 0.03 wt% GO, the wear volume of epoxy composite coating is dramatically reduced by 91.7% and the elastic modulus is increased by 16.3% compared with pure epoxy. The synergistic effect of the friction reduction of LM and the mechanical support of GO makes the composite coating form a uniform and stable transfer film, which improves its wear resistance. And through chemical stability experiments, the composite coating has a strong resistance to acid and alkali. This work will render the epoxy-LM@GO have the potential of application on the mechanical molds, electronic components.

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Section: Resultsmentioning

confidence: 99%

Section: Morphologymentioning

confidence: 99%

Section: Mechanism Of Friction and Wearmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergistic dispersion and tribo‐film formation of liquid metal @graphene oxide/epoxy coating: Toward improved mechanical and anti‐wear properties

et al. 2023

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“…Recently, it has been gradually discovered that LM also has unique properties in terms of lubrication (Guo et al , 2019; Ma et al , 2022). It has been reported that 1-dodecanethiol (DDM) was used as a surfactant to promote uniform dispersion of LM to form microspheres, and then PI/LM microsphere composite coatings were prepared by ultrasonic dispersion and thermal imidization (Dong et al , 2021). The results indicate that the incorporation of LM microspheres into the PI-LM coating results in a homogeneous dispersion, thereby endowing the coating with excellent thermal stability.…”

Section: Progress In Tribological Research Of Polyimide 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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Enhancing wear resistance and mechanical property of epoxy coating via “roller wheel” liquid metal‐MXene

Zheng,

Nie,

Wang

et al. 2024

J of Applied Polymer Sci

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This work presents a design of a unique “roller wheel” structure combining rigid MXene and flexible liquid metal (LM), aiming to construct an epoxy composite coating with simultaneous advanced mechanical strength and lubrication properties. The antiwear property of the epoxy composites is improved by 72.8% when the LM is 0.5 wt% and MXene is 0.03 wt%. The incorporation of LM‐MXene improved the mechanical properties of the epoxy composite coating, resulting in an approximately 136.6% increase in elastic modulus. The unique “roller wheel” structure provides additional mechanical support and leads to lower adhesion between the MXene layers and LM. As a result, LM reduces the stripping and sliding of the interface between MXene layers during the friction process, further enhancing the lubrication performance of the epoxy composite coating.

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Surfactant assisted and in situ formed micro liquid metal as excellent lubricant additive in polyimide coating

Cited by 9 publications

References 55 publications

Synergistic dispersion and tribo‐film formation of liquid metal @graphene oxide/epoxy coating: Toward improved mechanical and anti‐wear properties

Synergistic dispersion and tribo‐film formation of liquid metal @graphene oxide/epoxy coating: Toward improved mechanical and anti‐wear properties

Review of tribological properties of polyimide-based composite materials

Enhancing wear resistance and mechanical property of epoxy coating via “roller wheel” liquid metal‐MXene

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