Silica- and diatomite-modified fluorine rubber nanocomposites

Abstract

To find the most suitable filler system for fluorine rubber, a simple and green method to introduce a limited content of silanol groups on the surfaces of silica and fluorine rubber was studied. Fluorine rubber nano-composites were prepared by using nano-silica, diatomite and carbon black as the reinforcement and filler and the coupling agents KH550, KH590 or Si69 as the compatibilizer between the filler and fluorine rubber. The structure and morphology of the composites were investigated by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The results showed that the most suitable filler system for fluorine rubber was the diatomite and silica compound (8:12 mass ratio), the best coupling agent was KH550 at 2 parts per hundred rubber (phr). The modified compound filler was silanized with the coupling agent KH550 for fluorine rubber by FTIR analysis, the compatibility between the filler and fluorine rubber was improved by SEM analysis and further confirmed by thermogravimetric analysis to improve the thermal properties of fluorine rubber with the filler compound system.

Solvent‐free synthesized zeolites as compatibility agents in FKM rubber

“…These observations follow a similar trend reported by Wu et al, whose results show that modified dialomite can strengthen fluorine rubber (FKM) and has good compatibility. 23 In other words, the modification of the zeolite surface afforded significant improvements at low contents.…”

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.…”

Cornmeal Graphene/Natural Rubber Nanocomposites: Effect of Modified Graphene on Mechanical and Thermal Properties

“…With the development of the automobile industry, convenient transportation brings great revolution and, at the same time, also brings security problems, especially when the automobile tire is punctured on the highway, it is an urgent safety problem that is to be solved. Natural rubber (NR) is a natural carbohydrate composed of cis -1,4-polyisoprene and nonrubber substances such as protein, , sugars, and ash, , in which the unsaturated double bonds of NR are easily oxidized, leading to poor thermal stability. − Thus, the automobile tire prepared by NR would cause heat when rubbed on the ground of the highway for a long time. − When the heat cannot be conducted out, it accumulates inside the NR, causing heat aging of the NR and tire puncture . In industrial production, carbon black and silica were usually used to fill and reinforce NR, but the use of these two fillers would cause serious dust pollution, and there was almost no improvement in the thermal properties of NR.…”