Bioinspired Self-Healing Materials for Durable Infrastructure and Extreme Environmental Applications

Abstract

Modern infrastructure is increasingly exposed to heavy loads, corrosion, freeze-thaw cycles, chemical attack, fatigue damage, seismic stress, and climate-driven extremes. Conventional materials often accumulate microcracks and hidden defects that gradually reduce strength, service life, and safety while increasing maintenance costs. Inspired by biological systems such as skin, bone, vascular tissues, and plant regeneration mechanisms, self-healing materials have emerged as an advanced strategy for autonomous damage repair and long-term durability. This paper investigates bioinspired self-healing materials for durable infrastructure and extreme environmental applications. It examines healing mechanisms based on microcapsules, vascular networks, bacteria-induced mineralization, reversible polymers, shape-memory systems, and nano-engineered composites. Applications in concrete, asphalt pavements, protective coatings, aerospace structures, marine systems, pipelines, and energy infrastructure are analyzed. Particular emphasis is placed on crack sealing, corrosion prevention, fatigue recovery, and lifespan extension under severe thermal, mechanical, and chemical conditions. Sustainability benefits include lower repair frequency, reduced raw material consumption, lower lifecycle emissions, and improved resilience of critical assets. Major challenges include scalability, cost, healing reliability, long-term monitoring, compatibility with conventional manufacturing, and regulatory acceptance. A future roadmap is proposed involving sensor-integrated smart materials, AI-guided damage prediction, additive manufacturing, and multifunctional composites that combine structural strength with autonomous repair. The study concludes that bioinspired self-healing materials can redefine engineering durability by shifting maintenance from reactive repair to built-in regeneration, thereby supporting safer and more sustainable infrastructure systems.