Enhancement of Underwater Tribological Properties of Hybrid PTFE/Nomex Fabric Laminate Composites by Epoxy Resins

Liu, Ying; Gao, Gengyuan; Jiang, Dan; Zhu, Yin

doi:10.1021/acsomega.1c06524

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…And when the addition of MP continued to increase, the water absorption energy of the resin composites increased instead because the excessive addition of MP led to agglomeration in EP, which improved the diffusion of water in the MP/EP composites instead. Therefore, appropriate nano‐filled particles with good dispersion can reduce the permeability of water vapor 49–51 . Further evidence that the presence of MP is advantageous for impeding the movement of EP polymer molecular chains 52 …”

Section: Resultsmentioning

confidence: 99%

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Jiang

et al. 2023

J of Applied Polymer Sci

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The rapid development of the electronic packaging industry has necessitated the production of epoxy resin insulation materials with high heat resistance and low water absorption. In this study a new cross‐linking composite composed of polyhedral oligomeric silsesquioxane (POSS) functionalized with isocyanate groups and epoxy resin (EP) containing phenolic hydroxyl groups. By employing an isocyanate‐hydroxyl process, the cage structure of Ph7POSS with isocyanate functionalization (MP) can be suspended on EP, leading to a significant improvement in the thermal and moisture resistance of the MP/EP composite. Our DSC and TGA studies revealed that the addition of 3% MP to the epoxy resin increased the glass transition temperature by 27.1°C and raised the initial thermal breakdown temperature to 334.5°C. We also utilized a novel quartz crystal microbalance (QCM) technique to continuously monitor the moisture resistance of the composite, and our results showed that the composite absorbed only 0.03% of water. Moreover, the porosity and cross‐linking of the POSS molecules further restricted the movement of the polymer chains, thereby reducing the dielectric constant and dielectric loss of the composite. Consequently, the MP‐modified epoxy composites exhibit excellent properties, which suggest promising applications in the field of electronic packaging.

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Section: Resultsmentioning

confidence: 99%

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Jiang

et al. 2023

J of Applied Polymer Sci

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“…After that, the UHMWPE composites were taken out and processed into test samples of 6 mm × 7 mm × 30 mm. The production process of the hybrid fabric/phenolic resin composites was described in detail in the references. − …”

Section: Experiments Preparationmentioning

confidence: 99%

Enhancement of Underwater Tribological Behavior of Hybrid Fabric Composites Using Ultrahigh Molecular Weight Polyethylene and Different Fillers

Liu

Gao

Jiang

2023

ACS Appl. Eng. Mater.

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This paper comprised a study of a method to improve underwater tribological properties of hybrid PTFE/Nomex fabric composites by ultra-high molecular weight polyethylene (UHMWPE), SiO2, and graphite. A ring-on-block tribometer was used to perform the tribological test under dry sliding and water lubrication conditions. The worn surface was analyzed by scanning electron microscope (SEM). The results showed that with the help of UHMWPE, SiO2, and graphite, the underwater friction coefficient (COF) was reduced by 3 times, underwater wear amount was reduced by nearly 40 times, and water absorption was reduced by 12 times. The excellent underwater tribological properties were mainly due to UHMWPE having excellent water resistance and self-lubrication, and SiO2 and graphite fillers helped to improve wear resistance.

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“…Examples include new-type nylon, modified rubbers, reinforced phenolic resin, and so on. High-performance fiber fabric-reinforced resin composites combine the advantages of both fibers and resins, making them a high-strength, low-selflubricating bearing material [11][12][13]. It can be used in aviation, aerospace, shipbuilding, and so on.…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Cotton Fabric/Phenolic Resin Laminated Composites Reinforced with Two-Dimensional Materials

Guo,

Fang,

Wang

et al. 2023

Polymers

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In this study, cotton fabric-reinforced phenolic resin (CPF) composites were modified by adding four two-dimensional fillers: graphitic carbon nitride (g-C3N4), graphite (Gr), molybdenum disulfide (MoS2), and hexagonal boron nitride (h-BN). The tribological properties of these modified materials were investigated under dry friction and water lubrication conditions. The CPF/Gr composite exhibits significantly better tribological performance than the other three filler-modified CPF composites under dry friction, with a 24% reduction in friction coefficient and a 78% reduction in wear rate compared to the unmodified CPF composite. Under water lubrication conditions, all four fillers did not significantly alter the friction coefficient of the CPF composites. However, except for an excessive amount of Gr, the other three fillers can reduce the wear rate. Particularly in the case of 10% MoS2 content, the wear rate decreased by 56%. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were employed for the analysis of the morphology and composition of the transfer films. Additionally, molecular dynamics (MD) simulations were conducted to investigate the adsorption effects of CPF/Gr and CPF/MoS2 composites on the counterpart surface under both dry friction and water lubrication conditions. The difference in the adsorption capacity of CPF/Gr and CPF/MoS2 composites on the counterpart, as well as the resulting formation of transfer films, accounts for the variation in tribological behavior between CPF/Gr and CPF/MoS2 composites. By combining the lubrication properties of MoS2 and Gr under dry friction and water lubrication conditions and using them as co-fillers, we can achieve a synergistic lubrication effect.

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Enhancement of Underwater Tribological Properties of Hybrid PTFE/Nomex Fabric Laminate Composites by Epoxy Resins

Cited by 7 publications

References 30 publications

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Novel functionalized isocyanate groups polyhedral oligomeric silsesquioxanes/epoxy composites with advanced thermal and moisture resistance properties

Enhancement of Underwater Tribological Behavior of Hybrid Fabric Composites Using Ultrahigh Molecular Weight Polyethylene and Different Fillers

Tribological Behavior of Cotton Fabric/Phenolic Resin Laminated Composites Reinforced with Two-Dimensional Materials

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