Anti-Irradiation and Wear Resistance of Polyimide Composites

2017 ◽  
Vol 267 ◽  
pp. 253-257
Author(s):  
Jing Fu Song ◽  
Gai Zhao ◽  
Qing Jun Ding ◽  
Jin Hao Qiu
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Polymer Composites ◽  
High Performance ◽  
Atomic Oxygen ◽  
Proton Irradiation ◽  
Nano Particles ◽  
Space Environment ◽  
High Performance Polymer ◽  
The Individual

Space exploitation and development need high-performance polymer based tribo-materials in order to reduce the weight and improve the reliability of mechanical moving components. However, the wear resistance of polymer composites will decrease after space irradiation. In order to improve the anti-irradiation and wear resistance, the high performance polyimide (PI) composites reinforced with aramid fibers (AF), filled with polytetrafluoroethylene (PTFE) and Al2O3were designed and prepared using hot press sintering. The effect of the individual atomic oxygen or proton irradiation as well as both on the tribological properties of the PI composites were systematically investigated against Si3N4 ball on a ball-on-disk test rig under simulating space environment system, and coefficient of friction and wear rate were considered as responses. The worn surfaces of the composites were observed by scanning electrical microscopy to reveal wear mechanisms of the materials’ damage. Experimental results indicated that the wear rate of the PTFE/AF/PI greatly increased after atomic oxygen and proton irradiation due to oxidation degradation effect on the polymer matrix. However, filling Al2O3 nano-particles into polyimide matrix can improve the wear resistance because of oxidation layer, gradually formulated during the process of atomic oxygen irradiation, which can protect the polymer composites and avoid further oxidation. This study will expect to provide the helpful guidance for designing high performance polymer based frictional materials in the application of space science.

scholarly journals On the preparation and properties investigations of highly performant MXene (Ti3C2(OH)2) nanosheets-reinforced phthalonitrile nanocomposites

2019 ◽  
Vol 28 ◽  
pp. 2633366X1989062 ◽  
Author(s):  
Mehdi Derradji ◽  
Djalal Trache ◽  
Abdelkhalek Henniche ◽  
Abdeljalil Zegaoui ◽  
Aboubakr Medjahed ◽  
...  
Keyword(s):  
Polymer Composites ◽  
High Performance ◽  
Electron Microscopies ◽  
Morphological Studies ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Transmission Electron ◽  
High Performance Polymer ◽  
Two Phases ◽  
New Generation

Taking into consideration the latest advances in both ceramic and polymer fields, a new generation of high-performance polymer composites based on the state-of-the-art MXene (Ti3C2(OH)2) ceramics and one of the leading high-performance thermosets, namely the phthalonitrile resins, is presented. The synergistic combination between the two phases led to nanocomposites exhibiting an outstanding thermal stability with starting decomposition temperatures not less than 484°C for 3 wt% of nanoloading. The tensile properties were as high as those obtained with fiber-reinforced polymer composites. For instance, the tensile strength reached its highest value of 276 MPa for the maximum loading of 3 wt%. The morphological studies carried out by scanning and transmission electron microscopies corroborated the improvements of the thermal and mechanical properties. Undoubtfully, such materials expected to be used in extreme conditions can be seen as the next generation of ceramics-reinforced polymer composites.

Mechanistic Studies of Atomic Oxygen Reactions with Polymers and Combined Effects with Vacuum Ultraviolet Light

MRS Bulletin ◽  
2010 ◽  
Vol 35 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Masahito Tagawa ◽  
Timothy K. Minton
Keyword(s):  
Atomic Oxygen ◽  
Vacuum Ultraviolet ◽  
Uv Light ◽  
Synergistic Effects ◽  
Low Earth Orbit ◽  
Point Of View ◽  
Experimental Results ◽  
Space Environment ◽  
Combined Effects ◽  
The Individual

AbstractThis article focuses on mechanistic aspects of hyperthermal atomic oxygen reactions with polymers, which are the major contributor to material degradation in low Earth orbit. Due to the importance of well-controlled experiments in the understanding of the reaction mechanisms, ground-based experimental results obtained by a hyperthermal atomic oxygen beam generated by laser detonation facilities are mainly surveyed. Combined effects of atomic oxygen and vacuum ultraviolet (VUV) light on fluorinated polymers are also described. Such combined effects of hyperthermal atomic oxygen and VUV light are important not only from a fundamental point of view but also for engineering purposes (i.e., methodology for ground-based space environmental simulation). The VUV-sensitive polymers, poly(methyl methacrylate), and Teflon fluorinated ethylene-propylene do not show significant synergistic effects. Instead, the effect of combining atomic oxygen and VUV light produces erosion of the polymer that is the sum of the erosion caused by atomic oxygen and UV light acting individually. The experimental results suggest that material erosion in a complicated space environment may be quantitatively predicted if the erosion yields caused by the individual action of atomic oxygen and VUV light are known.

scholarly journals Nanocellulose and nanoclay as reinforcement materials in polymer composites: A review

2020 ◽  
Vol 16 (2) ◽  
pp. 145-153
Author(s):  
Fathin Najihah Nor Mohd Hussin ◽  
Roswanira Abdul Wahab ◽  
Nursyafreena Attan
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Environmental Impact ◽  
Polymer Composites ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Reinforced Polymer ◽  
Low Weight ◽  
High Performance Polymer ◽  
Strength And Stiffness

The advancement of nanotechnology has opened a new opportunity to develop nanocomposites using nanocellulose (NC) and nanoclay (NCl). Researchers have regarded these nanocomposites as promising substitutes for conventional polymers because of their characteristic and useful features, which include exceptional strength and stiffness, low weight, and low environmental impact. These features of NC and NCl explain their multifarious applications across many sectors. Here we review NC and NCl as well as various reinforced polymer composites that are made up of either of the two nanomaterials. The structural and physicochemical properties of NC and NCl are highlighted, along with the mechanical behavior and thermal properties of NC. Current nanomaterial hybrid biopolymers for the production of novel high-performance polymer nanocomposites are also discussed with respect to their mechanical properties.

The Influence of Nano-Silica on the Wear Resistance of Ceramic – Polymer Composites Intended for Dental Fillings

2009 ◽  
Vol 151 ◽  
pp. 135-138
Author(s):  
Joanna Siejka-Kulczyk ◽  
Joanna Mystkowska ◽  
Małgorzata Lewandowska ◽  
Jan R. Dabrowski ◽  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Wear Resistance ◽  
Polymer Composites ◽  
Coefficient Of Friction ◽  
Volume Fraction ◽  
Tooth Enamel ◽  
Nano Particles ◽  
Human Tooth ◽  
Nano Silica ◽  
The Coefficient Of Friction ◽  
Composite Samples

Ceramic – polymer composites based on acrylic (bis–GMA) and urethane – methacrylate (UM) resins with a 60 % total volume fraction of filler consisting of micro particles of glass and nano-particles of silica were fabricated. The nano-silica contents were: 0, 10, 20 vol. %. The composite samples were subjected to wear tests using an occlusion simulator tester which applies reciprocating movement and cyclic loading on the test material. This method of testing provides some similarity to the masticatory pattern occurring in the mouth during eating. The enamel of a human tooth was used as a counter-sample. The coefficient of friction was determined and the wear resistance of the composite samples containing the various nano-silica contents was established. In addition, the relative influence of the composite composition on the rate of wear of the human tooth enamel was estimated. The results of the study indicate that the addition of nano-silica significantly improves the wear resistance of the ceramic – polymer composites and reduces the wear of enamel. It was found that the addition of nano-silica has no influence on the coefficient of friction. It was also established that composites based on UM resin show better wear resistance than those based on a mixture of bis-GMA and TEGDMA resin.

A review on synthesis, functionalization, processing and applications of graphene based high performance polymer nanocomposites

2021 ◽  
Vol 17 ◽  
Author(s):  
Tushar T. Hawal ◽  
Maharudra S. Patil ◽  
Siddalinga Swamy ◽  
Raviraj M. Kulkarni
Keyword(s):  
Polymer Composites ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Nanocomposite Materials ◽  
Processing Methods ◽  
Graphene Nanocomposites ◽  
High Performance Polymer ◽  
Increasing Trend ◽  
Tremendous Importance ◽  
Biomedical Fields

: Graphene as a nanofiller has gained tremendous importance in polymer nanocomposites for many applications. The attractive properties of graphene related to mechanical, electrical, and thermal domains pose a lucrative means of reinforcing the polymers to obtain the needed properties. The rise in the use of polymers supports this trend and urges the researchers to excavate the hidden plethora of nanocomposite materials for multifunctional applications. In this review, an overview is provided on graphene-based materials which have been used extensively in various fields, such as batteries, aerospace, automobile and biomedical fields. An increasing trend of graphene usage by many researchers as a nanofiller in polymer composites, its types, processing methods are highlighted with suitable applications to assimilate the updates in the development of graphene nanocomposites.

High Performance Polymer Composites with Nanocarbon Materials

2013 ◽  
Vol 69 (3) ◽  
pp. P_70-P_76 ◽  
Author(s):  
SEIRA MORIMUNE ◽  
TAKASHI NISHINO
Keyword(s):  
Polymer Composites ◽  
High Performance ◽  
High Performance Polymer ◽  
Nanocarbon Materials
Sign in / Sign up

Export Citation Format

Share Document