Weibull reliability framework linking chemical architecture to functional service life in natural-fiber geotextiles for tropical soil erosion control

Résumé fourni par la source

Abstract Tropical soil degradation and the microplastic pollution associated with conventional geosynthetics have motivated the development of bioengineering strategies based on renewable materials intended to perform within a limited service window. This study assesses the technical feasibility and functional durability of geotextiles produced from Typha domingensis and Syagrus coronata and applies probabilistic modeling to propose engineering specifications grounded in chemical and mechanical degradation under real field exposure. Within the studied species pair, fiber chemical architecture, particularly the lignin-to-cellulose ratio (L/C), appears to modulate biodegradation kinetics, although the limited two-species dataset precludes broader generalization. For Typha domingensis , alkaline mercerization with 6% NaOH promoted critical morphostructural reorganization, reduced the degradation rate, and extended the functional service life (FSL) from 26 days in the untreated condition to 64 days. For Syagrus coronata , treatments with a morphochemical consolidation agent (MCA) exhibited a variable response: monolayer application resulted in an FSL of 63 days, whereas multilayer application promoted early delamination. Weibull-based inference indicates that defining performance through a reliability percentile ( $$\:{P}_{10}$$ ), rather than through mean values alone, may provide a useful criterion for aligning surface treatments with required service windows. The integration of microstructural characterization with reliability modeling indicates the potential of these natural-fiber geotextiles as temporary support elements in tropical soil bioengineering.

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