第一作者：ZT Wang，HJ Luo，J Zhang，HW Chen，H Jiang

发表刊物：MATERIALS CHEMISTRY AND PHYSICS

摘要：Basalt fiber is widely applied in composite materials. Recent years, it has a new application in filter bags. But commercial sizing agent always decomposes at 300 °C, which limits the application of basalt fiber above 300 °C. To solve this problem, in this study, a water-soluble polysiloxane sizing agent was synthesized and used to coat basalt fiber to improve its heat resistance. TG-DSC results showed the polysiloxanes starts to decompose at 370 °C. SEM and AFM results indicated that the surface of the fiber was wrapped by an organic coating. Abrasion tests showed friction factors of basalt fibers were decreased by the coating. XPS study showed there was a chemical connection between the layer and surface. Results of contact angles showed the surface energies of the fiber have increased after coated. Mechanical tests showed the breaking force of the coated basalt fiber could be maintained above 76% at 300 °C, which was 3.8 times that of unsized fiber, and kept above 49% at 400 °C, which was 2.4 times that of unsized fiber.

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