Non-thermal plasma activation of BPDA-PPD polyimide for improved cell-material interaction

Astoreca, Laura; Cools, Pieter; Schaubroeck, David; Asadian, Mahtab; Aliakbarshirazi, Sheida; Declercq, Heidi; Beeck, Maaike Op de; Morent, Rino; Smet, Herbert De

doi:10.1016/j.polymer.2020.122831

Cited by 13 publications

(9 citation statements)

References 35 publications

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“…Then, air was introduced in the reactor at a flow rate of 1.0 standard litre per min (slm) and the pressure was raised to 5.0 kPa. Plasma was ignited at this moment, with a discharge power of 3.0 W. The samples were exposed to the air plasma for 1.0 s, a previously optimized parameter for BPDA-PPD polyimide [100].…”

Section: Sample Preparationmentioning

confidence: 99%

Investigating the Nucleation of AlOx and HfOx ALD on Polyimide: Influence of Plasma Activation

et al. 2021

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There is an increasing interest in atomic layer deposition (ALD) on polymers for the development of membranes, electronics, (3D) nanostructures and specially for the development of hermetic packaging of the new generation of flexible implantable micro-devices. This evolution demands a better understanding of the ALD nucleation process on polymers, which has not been reported in a visual way. Herein, a visual study of ALD nucleation on polymers is presented, based on the different dry etching speeds between polymers (fast) and metal oxides (slow). An etching process removes the polyimide with the nucleating ALD acting as a mask, making the nucleation features visible through secondary electron microscopy analyses. The nucleation of both Al2O3 and HfO2 on polyimide was investigated. Both materials followed an island-coalescence nucleation. First, local islands formed, progressively coalescing into filaments, which connected and formed meshes. These meshes evolved into porous layers that eventually grew to a full layer, marking the end of the nucleation. Cross-sections were analyzed, observing no sub-surface growth. This approach was used to evaluate the influence of plasma-activating polyimide on the nucleation. Plasma-induced oxygen functionalities provided additional surface reactive sites for the ALD precursors to adsorb and start the nucleation. The presented nucleation study proved to be a straightforward and simple way to evaluate ALD nucleation on polymers.

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Section: Sample Preparationmentioning

confidence: 99%

Investigating the Nucleation of AlOx and HfOx ALD on Polyimide: Influence of Plasma Activation

et al. 2021

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“…In our previous works, it has been demonstrated that modification of polylactide, 10,11 polyurethane, 12 polyethylene, 13 and chitosan films by cold plasma treatment facilitated interaction between cells and polymer surfaces. It has been established 7 that plasma activation of the rigid‐chain polyimide BPDA‐PPD in air and in argon led to a significant increase in surface reactivity toward cells.…”

Section: Introductionmentioning

confidence: 99%

“…6 Polyimides are weakly hydrophilic materials; therefore, it is necessary to increase hydrophilicity of the surface of a PI-based material in order to use it as a film scaffold in cell cultivation. This may be realized 7 by activation of the surface by dielectric barrier discharge (DBDs) plasma at high frequencies (higher than 1 kHz) at atmospheric pressure. Usually, the main goal of plasma treatment is accumulation of functional groups on polymer surface.…”

Section: Introductionmentioning

confidence: 99%

Activation of R‐BAPB polyimide with cold plasma dielectric barrier discharge for improvement of cell‐material interaction

Kamalov

Смирнова

Kolbe

et al. 2022

J of Applied Polymer Sci

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Surface modification of films of the laboratory R‐BAPB polyimide based on 1,3‐bis(3,3′,4,4′‐dicarboxyphenoxy)benzene (dianhydride R) and 4,4′‐bis(4‐aminophenoxy)biphenyl (diamine BAPB) was performed using a dielectric barrier discharge (DBD) with the aim of increasing proliferative activity of human fibroblasts on these films. The optimal duration of the DBD plasma treatment that provided the highest fibroblast proliferative activity was established. The surface roughness value of the film treated for this optimal period of time was equal to 47.5 ± 4.7 nm, and its surface free energy was 70 mJ/m2. It was demonstrated that the DBD plasma treatment to an increase in the concentrations of CO and CN bonds on the surface of R‐BAPB polyimide films, which enhanced proliferative activity of fibroblasts. The optimal DBD exposure time was 3 minutes.

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“…Aromatic polyimide (PI) material, possessing excellent comprehensive properties, has been wildly applicated in aviation, aerospace, 1 automobile, electrical appliances, 2 micro‐electronics, 3 separation membranes 4 and other fields 5 . Due to its stable aromatic heterocyclic structure, PI presents remarkable temperature resistance (−269 ~ 400°C), excellent thermal and chemical stability, 6 outstanding mechanical properties, 7 radiation resistance and other significant characteristics 8,9 . At present, the traditional synthesis method is that the precursor polyamide acid (PAA) has to be synthesized with high molecular weight to get high performance, 10,11 which generated high viscosity in solution, therefore restricting the subsequent processing, especially when PI is used in coatings, 12 films, 13 adhesives and photoresists 14 …”

Section: Introductionmentioning

confidence: 99%

“…5 Due to its stable aromatic heterocyclic structure, PI presents remarkable temperature resistance (−269 400 C), excellent thermal and chemical stability, 6 outstanding mechanical properties, 7 radiation resistance and other significant characteristics. 8,9 At present, the traditional synthesis method is that the precursor polyamide acid (PAA) has to be synthesized with high molecular weight to get high performance, 10,11 which generated high viscosity in solution, therefore restricting the subsequent processing, especially when PI is used in coatings, 12 films, 13 adhesives and photoresists. 14 Generally, for better film formation, the solid content of PAA resin solution prepared by polymerization reaction is less than 20%, which may not meet the thickness requirement for use.…”

mentioning

confidence: 99%

Functionalized polyimide based on mercaptoacetic acid locking imine reaction: Synthesis and coating application

Cao

Wang

et al. 2021

Journal of Polymer Science

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To meet the high requirements for polyimide (PI) manufacturing process without sacrificing material performance, a new type fabrication method for PI is proposed here. Based on the classical Kapton system, functionalized precursor polyamide acid (MPAA) resin solution with high solid content, low viscosity and high relative molecular weight was obtained via mercaptoacetic acid locking imine (MALI) reaction, and a series of linear Mali‐Polyimide (MPI) films were prepared and their properties were well investigated. The results showed that MPIs have relatively excellent thermal stability (Td5%: 598 ~ 601°C), good heat resistance (Tg: 277 ~ 278 °C) and high adhesion strength. This work emphasizes the possibility and potential of MALI reaction in PI synthesis and is expected to be applied in coating and adhesive field.

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Non-thermal plasma activation of BPDA-PPD polyimide for improved cell-material interaction

Cited by 13 publications

References 35 publications

Investigating the Nucleation of AlOx and HfOx ALD on Polyimide: Influence of Plasma Activation

Investigating the Nucleation of AlOx and HfOx ALD on Polyimide: Influence of Plasma Activation

Activation of R‐BAPB polyimide with cold plasma dielectric barrier discharge for improvement of cell‐material interaction

Functionalized polyimide based on mercaptoacetic acid locking imine reaction: Synthesis and coating application

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