Solid‐state recycling of polyimide film waste

Abstract

Possibility of the polyimide (PI) films waste recycling by solid-state mechanochemistry was investigated in this study. Obtained PI powder was used for development of thermostable blends and multicomponent tribocompositions, which include additions of carbon black, ultradispersive diamond powder, and quasicrystalls. PI films waste treatment was provided in high-energy planetary ball mill. Powder compositions were mixed by low-energy planetary ball mill. Bulk samples were obtained by compression molding. Structural and thermal properties of initial polymers and composite materials were determined from scanning electron microscope, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis and fourier transform infrared spectroscopy. Tribological tests of composite materials were provided in dry sliding regime on ''pin-on-disk'' tribometer. Finally, optimal regimes of polymer composite materials producing were obtained.

New High-Performance Materials: Bio-Based, Eco-Friendly Polyimides

“…Solid-state mecano-chemistry can be successfully applied in the recycling of PI film wastes with the purpose to develop thermostable blends and multicomponent tribocompositions. To gain applicative potential, these can be prepared in combination with other high-performance polymers, carbon black, diamond powder, and Al-Cu-Fe crystals [167].…”

Tribological, Mechanical and Thermal Properties of Fluorinated Ethylene Propylene Filled with Al-Cu-Cr Quasicrystals, Polytetrafluoroethylene, Synthetic Graphite and Carbon Black

“…This indicates that fluoropolymers should be considered as suitable matrices for QC-filled composites. In [ 34 ] FEP-based multicomponent composites were investigated, and it was observed that addition of QC particles significantly increases the wear resistance and decreases the friction coefficient of composites.…”

“…It should be noted that in most of composites discussed above icosahedral QC alloys of a Al-Cu-Fe [ 13 , 15 , 17 , 19 , 20 , 21 , 23 , 24 , 29 , 30 , 31 , 32 , 33 , 34 ] system or of Al-Cu-Fe systems alloyed with boron [ 14 , 16 , 26 ] were used as reinforcing particles. Indeed, Al-Cu-Fe is the most investigated QC-forming system, as the icosahedral QC phase in this system is thermodynamically stable, easy to synthesize, and possesses a number of advanced properties [ 35 ].…”

Recycled moulded polyimide materials obtained by high‐energy ball milling

“…One of the solutions is to prepare PI fillers . For example, they could be injection mouldable compositions for tribological applications based on high‐performance thermoplastics, for example, PPS, PEEK, or PBI, with PI powders acting as dispersion fillers with the following benefits over metallic or ceramic fillers: excellent wear resistance, low abrasion, low noise level, self‐lubrication ability. The introduction of recycled powders into thermoplastics is often used in practice to recycle thermoset plastics and rubbers.…”