Study on mechanical and tribological properties of ternary fluororubber filled with four needles of zinc oxide

Abstract

This article deals with study of the influence of four‐needle zinc oxide (T‐ZnOw) on the basic mechanical properties of ternary fluororubber (FKM) and the frictional properties of FKM improved by four‐needle zinc oxide under different temperatures. T‐ZnOw/FKM composites were prepared by mechanical blending and hot molding after pretreatment with silane coupling agent. The hardness, tensile, tearing, rotating friction at normal temperature, and reciprocating friction at high temperature of FKM and T‐ZnOw/FKM were studied. The results showed that T‐ZnOw with needle‐like three‐dimensional (3D) structure can effectively decompose the point stress generated in the tensile process of the composite, and the uniform distribution of tensile force improves the fracture base point and final mechanical properties of the composite. Its unique 3D structure can reduce fatigue wear caused by extrusion plastic deformation of the matrix during the friction process. The friction coefficient and wear rate of materials were effectively reduced by the reduction of plastic deformation resistance and fatigue wear area in the process of friction. Especially at 200°C, the friction coefficient and wear rate of T‐ZnOw/FKM were reduced by 30% and 55.32%, respectively, by T‐ZNOW/FKM doping.

Study on the interaction between fluoroelastomer and silica: Characterizations

“…6,8,9 The other type is inorganic filler, such as diatomite, talcum powder, calcium carbonate, barium sulfate, calcium fluoride, metallic oxide, and so forth, which are also frequently used fillers in fluoroelastomers. [10][11][12][13][14][15][16] At the same time, some new fillers, such as graphite/ graphene, [17][18][19][20][21] carbon nanotubes, [22][23][24] carbon fiber, [25][26][27] and so forth, have also received extensive attention. However, the study about the interaction between fluoroelastomer and fillers are few and not systematical.…”

“…Nowadays, there are two categories of fillers used in fluoroelastomers: one is carbon black, especially thermal black such as N990 (classification from ASTM D1765‐2014), which is widely used in fluororubber products 6,8,9 . The other type is inorganic filler, such as diatomite, talcum powder, calcium carbonate, barium sulfate, calcium fluoride, metallic oxide, and so forth, which are also frequently used fillers in fluoroelastomers 10–16 . At the same time, some new fillers, such as graphite/graphene, 17–21 carbon nanotubes, 22–24 carbon fiber, 25–27 and so forth, have also received extensive attention.…”

Effect of cyanide content on the tribological performance of nitrile butadiene rubber

“…The friction process results in leakage issues, which lead to a reduction in the hydraulic system energy or failure, a light effect on the integrity rate of aviation equipment, and a heavy impact that results in flight accidents. [1][2][3] Currently, nitrile butadiene rubber (NBR), [4][5][6][7][8][9] hydrogenated nitrile butadiene rubber (HNBR), 10,11 ethylene propylene diene monomer (EPDM), [12][13][14] and fluorocarbons (FKM) [15][16][17] are the primary materials used in conventional aviation sealing applications. NBR, a sealing material made by copolymerizing butadiene and acrylonitrile, is well known for its excellent solvent resistance, wear Peng Wei and Qingkun Liu contributed equally to this work.…”