Synergistic reinforcement and flame retardancy in silicone rubber achieved by magnesium silicate nanotubes

影响因子：5.4

DOI码：10.1016/j.ceramint.2026.01.110

发表刊物：Ceram. Int.

关键字：Silicone rubber Magnesium silicate Filler Flame-retardant Mechanical properties

摘要：To address the critical limitations of intrinsic mechanical weakness and high flammability in silicone rubber, this study pioneers a novel strategy by employing synthetic magnesium silicate nanotubes (MS) as an integrated multifunctional filler. The hollow tubular MS was successfully synthesized via a mild hydrothermal route and incorporated into the silicone rubber matrix. Comprehensive characterization confirms its uniform dispersion and strong interfacial adhesion with the polymer. The incorporation of MS leads to a remarkable and simultaneous enhancement in both mechanical and flame-retardant properties. At an optimal loading of 5 wt%, the composite exhibits a significant improvement in tensile strength (up to 3.05 MPa) and elongation at break (406 %), attributable to a synergistic mechanism combining physical interlocking within the nanotube channels and chemical anchoring via interfacial Si-O-Si covalent bonds. In terms of fire safety, MS functions primarily in the condensed phase by catalyzing the formation of a dense, coherent, and thermally stable char layer reinforced with -Si-O-Mg- hybrid networks. This results in a substantially increased limiting oxygen index (30.7 %), a UL-94 V-0 rating, and a reduced linear ablation rate (0.211 mm/s). This work not only demonstrates MS as a highly effective dual-functional filler but also elucidates the fundamental structure-property relationships, offering a promising pathway for developing advanced silicone rubber composites for safety-critical applications in aerospace, electric vehicles, and flexible electronics.

合写作者：Li Wenbo,Ding Chongtao

论文类型：期刊论文

通讯作者：Zhang Yifu*,Yi Shengping *,Huang Chi *

学科门类：理学

文献类型：J

是否译文：否

发表时间：2026-01-09

收录刊物：SCI

发布期刊链接：https://doi.org/10.1016/j.ceramint.2026.01.110