Erosion of polyimide modified by amorphous silica sol in the stream of oxygen plasma

Vernigorov, K. B.; Alent’ev, A. Yu.; Muzafarov, А. М.; Novikov, L. S.; Chernik, V. N.

doi:10.1134/s1027451011030190

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…After treatment of the PI film with an oxygen plasma flow, a strong change in the surface morphology is noticeable; it acquires a pile-like morphology (Fig. 5b), which is typical for most polymers irradiated with oxygen plasma [40][41][42]. The appearance of a granular relief is noticeable, formed by depressions and raised sections of a conical and acicular shape, oriented towards the flow of the oxygen plasma (Fig.…”

Section: 3mentioning

confidence: 92%

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Черкашина

Павленко

Носков

et al. 2021

Polymer

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This work presents, for the first time, data on the possibility of synthesizing polyimide nanocomposite films based on track nuclear membranes and organosiloxane (polyhedral oligomeric silsesquioxanes) POSS structures. The synthesis of the nanocomposite films was carried out by filling the tracks of a polyimide membrane with POSS structures under hydrothermal conditions in a high-pressure reactor. The surface and mechanical characteristics of the developed nanocomposite films were studied, and the results of their resistance to the flow of oxygen plasma are presented. It was found that the introduction of POSS structures significantly increased the resistance of polyimide to the flow of oxygen plasma. The PI/POSS composite exhibited an insignificant change in weight, the weight loss reached 0.92 ± 0.05 mg/cm 2 in 24 h after the start of the experiment, which is almost two orders of magnitude lower than that of the polyimide film.

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Section: 3mentioning

confidence: 92%

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Черкашина

Павленко

Носков

et al. 2021

Polymer

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“…Previous studies have shown that nano-composite modification of polyimide can effectively improve its comprehensive properties including corona resistance, heat resis-tance [5][6][7], and the doping of silicon-containing particles in polyimide can improve the comprehensive properties of the material, including anti-atomic oxygen performance, dielectric property [8,9]. However, there is a lack of research on inter-turn insulation of high-frequency transformers, that is, the development process and characteristics of highfrequency creeping discharge of polyimide film under extremely uneven fields, especially after the polyimide is modified by nanocomposite with SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Study on High Frequency Surface Discharge Characteristics of SiO2 Modified Polyimide Film

Xing

Chen

et al. 2021

Polymers

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Polyimide (PI) can be used as a cladding insulation for high frequency power transformers, and along-side discharge can lead to insulation failure, so material modification techniques are used. In this paper, different doped nano-SiO2 are introduced into polyimide for nanocomposite modification. The results of testing the life time of high-frequency electrical stress along-side discharge show that the 10% SiO2 doping has the longest life time. The results show that: for composites prone to corona, their flashover causes more damage, and both positive half-cycle and polarity reversal discharges are more violent; compared to pure PI, the positive half-cycle and overall discharge amplitude and number of modified films are smaller, but the negative half-cycle is larger; at creeping development stages, the number of discharges is smaller, and the discharge amplitude of both films fluctuates in the mid-term, with the modified films having fewer discharges and the PI films discharging more violently in the later stages. The increase in the intensity of the discharge was greater in the later stages, and the amplitude and number of discharges were much higher than those of the modified film, which led to a rapid breakdown of the pure polyimide film. Further research found that resistivity plays an important role in the structural properties of the material in the middle and late stages, light energy absorption in the modified film plays an important role, the distribution of traps also affects the discharge process, and in the late stages of the discharge, the heating of the material itself has a greater impact on the breakdown, so the pure polyimide film as a whole discharges more severely and has the shortest life.

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Investigation of the structure of a polyimide modified by hyperbranched polyorganosiloxanes

Vernigorov

Chugunova

Alent’ev

et al. 2012

J. Synch. Investig.

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Erosion of polyimide modified by amorphous silica sol in the stream of oxygen plasma

Cited by 6 publications

References 4 publications

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Study on High Frequency Surface Discharge Characteristics of SiO2 Modified Polyimide Film

Investigation of the structure of a polyimide modified by hyperbranched polyorganosiloxanes

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