Pitch-Based Carbon Fibre-Reinforced PEEK Composites: Optimization of Interphase Properties by Water-Based Treatments and Self-Assembly

Martin, Arnaud; Addiego, Frédéric; Mertz, Grégory; Bardon, Julien; Ruch, David; Dubois, Philippe

doi:10.4172/2169-0022.1000308

Cited by 5 publications

(1 citation statement)

References 41 publications

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“…The studied treatments include (1) PI surface preparation by cleaning, plasma activation, and roughness modification by abrasion, (2) adhesive bonding by the deposition of an adhesive nanocoating on PI, and (3) the welding of PLA by heating against PI. The use of a nanocoating adhesive such as polydopamine (PDA), known as a universal adhesive [21], is expected to better transmit the thermoplastic matrix strain level to the sensor [22,23], compared with the use of a conventional thick adhesive (Table 1) that may block or dissipate strain [24]. Aside from that, PDA is deposited from an aqueous solution of dopamine (DA), thereby preventing the utilization of hazardous solvents.…”

Section: Introductionmentioning

confidence: 99%

Adhesion Optimization between Incompatible Polymers through Interfacial Engineering

et al. 2021

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Additive manufacturing technologies such as fused filament fabrication (FFF) open many possibilities in terms of product functionality, including the possibility to integrate a sensor in FFF parts to perform structural health monitoring. In this context, embedding fiber Bragg grating (FBG) sensors into 3D-printed polymeric structures for strain or temperature measurements has attracted increasing attention in recent years. Indeed, offering structural health monitoring functionality can optimize the maintenance cost and increase security compared with conventional materials. However, the transmission of strain and temperature between the polymeric matrix and the FBG polymer jacket requires optimal bonding between them. In this work, the two polymers of interest are polyimide (PI) and poly(lactic acid) (PLA) for the FBG jacket and printed polymer, respectively. The current study investigates the influence of different surface treatment methods on the adhesion between a PI film and a plate of PLA, with PLA and PI being incompatible polymers. The adhesion promotion applied to the PI surface relies on cleaning, plasma activation, roughness modification, or the use of adhesive nanocoating. Bilayer samples of PI-PLA are processed by welding PLA against the treated PI by heating, whereas the adhesion between PI and PLA is measured by peel testing. It is observed that the highest adhesion between PI and PLA is achieved by a combination of mechanical abrasion increasing roughness and the use of polydopamine as an adhesive. This finding is discussed based on a synergetic effect between mechanical interlocking and chemical interaction between the two counterfaces.

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Section: Introductionmentioning

confidence: 99%

Adhesion Optimization between Incompatible Polymers through Interfacial Engineering

et al. 2021

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Adhesion Engineering in Polymer–Metal Comolded Joints with Biomimetic Polydopamine

Kafkopoulos

Padberg

Duvigneau

et al. 2021

ACS Appl. Mater. Interfaces

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Joints that connect thermoplastic polymer matrices (TPMs) and metals, which are obtained by comolding, are of growing importance in numerous applications. The overall performance of these constructs is strongly impacted by the TPM–metal interfacial strength, which can be tuned by tailoring the surface chemistry of the metal prior to the comolding process. In the present work, a model TPM–metal system consisting of poly(methyl methacrylate) (PMMA) and titanium is used to prepare comolded joints. The interfacial adhesion is quantified by wire pullout experiments. Pullout tests prior to and following surface modification are performed and analyzed. Unmodified wires show poor interfacial strength, with a work of adhesion ( G a ) value of 3.8 J m –2 . To enhance interfacial adhesion, a biomimetic polydopamine (PDA) layer is first deposited on titanium followed by a second layer of a poly(methyl methacrylate- co -methacrylic acid) (P(MMA- co -MAA)) copolymer prior to comolding. During processing, the MAA moieties of the copolymer thermally react with PDA, forming amide bonds, while MMA promotes the formation of secondary bonds and molecular interdigitation with the PMMA matrix. Control testing reveals that neither PDA nor the copolymer provides a substantial increase in adhesion. However, when used in combination, a significant increase in adhesion is detected. This observation indicates a pronounced synergistic effect between the two layers that strengthens the PMMA-titanium bonding. Enhanced adhesion is optimized by tuning the MMA-to-MAA ratio of the copolymer, which shows a maximum at a 24% MAA content and a greatly increased G a value of 155 J m –2 ; this value corresponds to a 40-fold increase. Further growth in the G a values at higher MAA contents is hindered by the thermal cross-linking of MAA; MAA contents above 24% restrict the formation of secondary bonds and molecular interdigitation with the PMMA chains. Our results provide new design principles to produce thermoplastic–metal comolded joints with strong interfaces.

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Cellular Wettability Assessment by Air-Injection-mediated Liquid Exclusion methods

Han

Tanaka

Takahara

et al. 2023

2022 IEEE International Conference on Cyborg and Bionic Systems (CBS)

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Pitch-Based Carbon Fibre-Reinforced PEEK Composites: Optimization of Interphase Properties by Water-Based Treatments and Self-Assembly

Cited by 5 publications

References 41 publications

Adhesion Optimization between Incompatible Polymers through Interfacial Engineering

Adhesion Optimization between Incompatible Polymers through Interfacial Engineering

Adhesion Engineering in Polymer–Metal Comolded Joints with Biomimetic Polydopamine

Cellular Wettability Assessment by Air-Injection-mediated Liquid Exclusion methods

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