Research on polyamide based self‐lubricating composites: A review

Abstract

Owing to its good tribological and mechanical properties, polyamide material was widely applied to prepare sliding mechanical parts. A lot of studies confirmed that adding different functional materials or surface modifications to polyamide could reduce the friction coefficient, improve wear resistance and reduce water absorption, so as to prolong the service life of polyamide parts. This paper summarized the common reinforcement methods of polyamide materials: blending, surface modification and filler. The reinforcing mechanism of different fillers and polymers, the effects of different methods on the tribological properties, mechanical properties and water absorption of polyamide composites, and the preparation methods of polyamide composites have been systematically discussed.

Fracture toughness of PA6/POE‐g‐MA/TiO2 ternary nanocomposites according to the essential work fracture method

“…[1][2][3][4] However, this polymer has disadvantages, such as high humidity absorption, small resistance to crack propagation, high impact notch sensitivity, and low dimensional stability, which limit their use as a useful polymer in industrial sectors. [4][5][6][7][8][9] It is well known that fracture toughness affects the performance of polymers in various engineering applications. Therefore, the polymer toughening process has been an important and attractive topic for researchers.…”

Epoxy filled with nylon powder—An approach to reduce void formation via fused particle method

“…5,6 Nylon is popular for being used in industry nowadays because of its variety, complex internal structure, versatility, and commercial importance. [7][8][9][10] Nylon, encompassing variants, such as Nylon 6, Nylon 66, Nylon 11, and Nylon 12, shares a fundamental structure with an amide linkage [ NH-(CH 2 ) n -CO ] forming its backbone. Among these, Nylon 12 stands out because of its myriad advantages, contributing to its extensive use across diverse applications.…”

“…Particulate‐filled epoxy composites offer a wide range of tailorable properties, making them versatile materials with applications across multiple industries 5,6 . Nylon is popular for being used in industry nowadays because of its variety, complex internal structure, versatility, and commercial importance 7–10 . Nylon, encompassing variants, such as Nylon 6, Nylon 66, Nylon 11, and Nylon 12, shares a fundamental structure with an amide linkage [NH‐(CH 2 ) n ‐CO] forming its backbone.…”

Tribological and Mechanical Applications of Liquid-Crystal-Polymer-Modified Carbon-Fiber-Reinforced Polyamide–Polyurethane Composites

“…Polyamide-polyurethane (PA-PU) block copolymers could improve the structural stability of polyamide, addressing its issues of low-notched impact strength and poor toughness [1][2][3]. While PA-PU copolymers are expected to replace metal and ceramic materials in gears, bearings, and other critical components, they still face challenges due to the low wear resistance under sliding conditions, which makes them prone to failure in mechanical parts [4,5]. Therefore, the enhancement of friction and wear resistance of the PA-PU copolymers is essential for their practical applications.…”