Making hemp fabric fire-safe, waterproof, and germ-fighting

This research focuses on creating advanced coatings for hemp fabric using a combination of phytic acid-modified chitosan and silicone-containing polyurethane. While this paper is primarily a materials science study about textile engineering rather than cannabis pharmacology, it does explore the functional properties of hemp as an agricultural material. The coating technology creates a multilayer structure that dramatically improves the fabric's performance across multiple dimensions: flame retardancy, water resistance, and antibacterial protection. The phytic acid-chitosan component forms a protective barrier that decomposes under heat to create a dense carbon layer, while the silicone component migrates to the surface to provide hydrophobic (water-repelling) properties.

The practical performance improvements are substantial and relevant to industrial applications. The coated hemp fabric achieved a UL-94 V-0 flame rating (the highest fire safety standard) with a limiting oxygen index of 35.1%, while reducing heat release metrics by 65.8% to 80.7% compared to untreated fabric. Simultaneously, the fabric gained excellent water resistance with a contact angle of 133.10° and demonstrated strong antibacterial activity against common pathogens (S. aureus and E. coli). Beyond protective properties, the coating also enhanced mechanical durability, increasing breaking strength by 41.6-40.7% while improving fabric flexibility and softness.

This work demonstrates the potential for hemp as a sustainable textile material when enhanced with functional coatings, opening possibilities for biomedical, home furnishing, and specialized protective textile applications. The durability findings—with 94.2% strength retention after 10 washing cycles—suggest these improvements are practical for real-world use rather than laboratory curiosities.