ADVANCED MATERIALS & PROCESSES | JANUARY/FEBRUARY 2025 9 during manufacturing result in it not being isotropic. Specifically, the fabric is more resistant to being stretched in the direction of the warp fibers. Parachutes are made of different textile pieces attached to each other, and the orientation of these pieces influences the overall properties. This research informs models that will be used to identify promising textiles. illinois.edu. LIQUID REPELLENT MICROSTRUCTURES Scientists at Griffith University, Australia, are exploring the potential of re-entrant microstructures to repel water and other liquids from their surfaces, making new strides in understanding the behaviors of these advanced surface structures. The breakthrough could impact a wide range of industries, from self-cleaning materials to medical devices. The research revealed how factors such as shape, material, and spacing of these microstructures influenced their ability to resist wetting or liquid spreading. The team focused on two materials, silicon dioxide (SiO ) and silicon carbide (SiC), which each offered unique properties. While SiC is known for its inherent hydrophobic nature, the researchers found the overall geometry—especially the spacing and shape of these tiny cap-like structures—played a more significant role in influencing liquid behavior than the type of material itself. They found re-entrant structures with larger gaps between them effectively trapped air pockets, enhancing water repellence and preventing the liquid from fully wetting the surface. This balance between material properties and structure provided new insight on designing liquid-repellent surfaces. Researchers say these findings could open doors to creating materials that can withstand extreme conditions, such as high temperatures or harsh chemicals, using materials like silicon carbide. www.griffith.edu.au. SEM image of a single re-entrant structure with a circular SiO2cap; scale bar: 5 µm. Courtesy of Gri ith University. STAY AHEAD OF YOUR PROFESSIONAL JOURNEY WITH ASM EDUCATION & TRAINING. EARN CEUs, ENJOY DISCOUNTS, NETWORK, AND LEARN FROM INDUSTRY EXPERTS. SCAN TO ENROLL TODAY Education
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