Hur alkalinitet i cement påverkar biofiber över tid

Abstract

The cement industry contributes significantly to global carbon dioxide emissions and drives the need for sustainable alternatives such as biofiber reinforcement in cement. The highly alkaline environment of cement has the potential to degrade biofibers, which impairs their long term performance. This study investigates the microscopic effects of the alkaline cement environment on biofibers coated with ex foliated graphite over time. Fibers from sugarcane and corrugated paper were coated with exfoliated graphite using two distinct methods. The fibers were exposed to an alkaline solution for 1, 7 and 28 days. The samples were analyzed using FTIR, XRD, SEM, EDS and TGA. Results indicate that the exfoliated graphite coating had an impact on the surface interaction between the biofiber and the alkaline solution by affecting the deposition of Calcium (Ca) on the biofiber surface. Additionally the thermal stability of the biofiber differed depending on whether the coating was present after conditioning for 28 days. One of the methods yielded a significantly better coating and higher chemical stability than the other method. Some structu ral degradation may still have occurred depending on the fiber type and application method. The coated biofibers demonstrated better resistance and stability compared to uncoated reference samples. Exfoliated graphite coating provides a potential for protecting biofibers in an alkaline environment like cement. Future research must address long term exposure and process upscaling before industrial implementation.