POSS enhanced 3D graphene - Polyimide film for atomic oxygen endurance in Low Earth Orbit space environment

Shivakumar, R.; Bolker, Asaf; Tsang, Siu Hon; Atar, Nurit; Verker, Ronen; Gouzman, I.; Hala, Mor; Moshe, Nehora; Jones, Alexandra M. E.; Grossman, Eitan; Minton, Timothy K.; Teo, Edwin Hang Tong

doi:10.1016/j.polymer.2020.122270

Cited by 42 publications

(39 citation statements)

References 73 publications

(96 reference statements)

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“…Only 2 peaks appear at 1580 cm -1 and 2705cm -1 , which represent the G and 2D peaks respectively, indicating the presence of graphene. The absence of the defect peak at 1350cm -1 indicates that the graphene present in 3D-C were of pristine quality [26,[43][44][45][46][47].…”

Section: Materials Characterizationmentioning

confidence: 99%

Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Ngoh

Guiraud

Tan

et al. 2020

Carbon

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In the past decade, a lot of research has been conducted on the potential of carbon nanostructured materials to emit sound via thermoacoustics through both simulations and experiments. However, experimental validation of simulations for three-dimensional graphene (3D-C), which has a complicated 3D structure, has yet to be achieved. In this paper, 3D-C is synthesized via thermal chemical vapor deposition and its microstructure and quality tested using Scanning Electron Microscopy and Raman spectroscopy respectively. Then, a two temperature model is used to predict the effects of numerous parameters: frequency, input power, sample size, connection area, connection path, pores per inch, thickness, compression as well as the addition of a backing on the acoustic performance and temperature of the 2 sample. The experimental results presented in this paper validate the predictions of the adopted two temperature model. The efficiency of 3D-C is then compared with results presented in other studies to understand how the presented 3D-C fared against ones from the literature as well as other carbon nanostructured materials.

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Section: Materials Characterizationmentioning

confidence: 99%

Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Ngoh

Guiraud

Tan

et al. 2020

Carbon

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“…In addition, the work [46] was found that the introduction of 5 wt% of POSS into a 3D-C/PI composite increases the Youngs's modulus of 3D-C/PI. However, upon further introduction of 3D-C/PI composite with 15 wt% of POSS has lower modulus than 3D-C/PI with 5 wt% POSS.…”

Section: Changes In Mechanical Properties After Exposure To Aomentioning

confidence: 99%

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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“…POSS structure comprises of a silica core as a backbone, with a Si atom attached on its vertex linking the O atom. The incorporated organic functional group attached to POSS moiety execute a vital role in modifying MMT and exfoliating the structure [22,23]. Recent reports have inferred the role of POSS as a nanofiller reinforcement in enhancing the thermal, mechanical, and electrical properties of the polymer [24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Effect of POSS-Modified Montmorillonite on Thermal, Mechanical, and Electrical Properties of Unsaturated Polyester Nanocomposites

et al. 2020

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Montmorillonite (MMT) displays excellent cohesion with an unsaturated polyester (UP) matrix to generate a material which exhibits an extensive range of commercial applications. The organic modification of MMT using polyhedral oligomeric silsesquioxanes (POSS) and the effect of POSS-MMT on the thermal, mechanical, and electrical properties of UP are reported here. Transmission electron microscopy (TEM) images were used to characterize the modification of MMT using POSS. Modified MMT (POSS-MMT) was incorporated, at different wt.% (0.5, 1, 3, 5), into UP via in-situ polymerization. The presence of POSS-MMT enhanced the characteristic properties of UP as a consequence of good dispersion in the polymer matrix. Scanning electron microscopy (SEM) images support effective POSS-MMT dispersion leading to tensile strength enhancement of a UP/POSS-MMT nanocomposite (3 wt.% POSS-MMT) by 54.7% as compared to that for unmodified UP. TGA displays a 35 °C improvement of thermal stability (10% mass loss) at 5% POSS-MMT incorporation, while the electrical conductivity is improved by 108 S/m (3 wt.% POSS-MMT) in comparison to that for unmodified UP. The conventional obstacle of UP associated with shrinkage weight loss during curing seems to be moderated with POSS-MMT incorporation (3%) resulting in a 27.8% reduction in shrinkage weight loss. These fabricated nanocomposites expand the versatility of UP as a high-performance material owing to enhancements of properties.

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POSS enhanced 3D graphene - Polyimide film for atomic oxygen endurance in Low Earth Orbit space environment

Cited by 42 publications

References 73 publications

Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

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

Effect of POSS-Modified Montmorillonite on Thermal, Mechanical, and Electrical Properties of Unsaturated Polyester Nanocomposites

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