油胺对天然橡胶/白炭黑复合材料结构与性能的影响

doi:10.11896/cldb.25030241

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Abstract Oleylamine was used to modify the surface of silica, and silica with different oleylamine contents/natural rubber composites were prepared in this work. This work emphatically studied the effect of oleylamine content on the vulcanization characteristics, dispersion of silica, interfacial interactions between rubber and silica, and properties of NR composites. The results indicated that oleylamine molecules cover the surface of silica through the chemical reactions between terminal amino groups of oleylamine and silicon hydroxyl groups of silica or hydrogen bonding, thereby reducing the hydrophilicity of silica. The presence of oleylamine reduces the Mooney viscosity of the rubber compound, promotes the vulcanization reaction, and increases the crosslinking density of the vulcanizates. When the oleylamine content is 11.8%, the composite exhibits the optimal tensile properties, with a tensile strength as high as 30.4 MPa. Compared with the unmodified silica system, the tensile strength and elongation at break increase by 20% and 56%, respectively, while the heat build-up as compressing decreases by 46%. The NR/SiO₂-11.8OA compo-site shows the lowest loss factor at 60 ℃ while maintaining a relatively high loss factor at 0 ℃, indicating its potential to endow tires with low rolling resistance and improved wet skid resistance. The improved filler dispersion and enhanced interfacial interactions by oleylamine can be attributed to the following mechanisms: Oleylamine shields the silanol groups on the silica surface, preventing silica particle agglomeration caused by hydrogen bonding, thereby promoting silica dispersion in natural rubber. Additionally, the presence of oleylamine molecules on the silica surface enhances its compatibility with NR, and the double bonds in oleylamine molecules can participate in the vulcanization reaction, further strengthening the interfacial interaction between silica and rubber.

Key words： oleylamine silica (SiO₂) surface modification natural rubber mechanical property

Received: 10 May 2026 Published: Online: 2026-05-18

CLC number:

TQ330.7

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	Articles by authors
	OUYANG Jinghao
	WU Tingting
	LI Yao
	YANG Feng
	LI Donghan

Cite this article:

OUYANG Jinghao,WU Tingting,LI Yao, et al. Effect of Oleylamine on the Structure and Properties of NR/Silica Composites[J]. Materials Reports, 2026, 40(9): 25030241-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25030241 OR https://www.mater-rep.com/EN/Y2026/V40/I9/25030241

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