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| Researchers Develop Ultra-Slick Toilet Surface that Prevents Adhesion |
Scientists at China's Huazhong University of Science and Technology have developed a groundbreaking 3D-printed toilet bowl design that may revolutionize bathroom fixtures, potentially rendering traditional porcelain and ceramic toilets obsolete. The primary advantage of this innovative design is its exceptionally slippery surface.
The issue of waste adhering to toilet bowls not only presents an unpleasant experience for restroom users and cleaners but also results in the unnecessary consumption of water as multiple flushes are often required to dislodge stubborn residue.
In an effort to address this problem, the scientists engineered a non-stick toilet bowl using a combination of plastic and hydrophobic sand grains. These materials were fused together using laser-based 3D printing technology, resulting in a toilet bowl approximately one-tenth the size of a standard one.
This state-of-the-art creation, known as the abrasion-resistant super-slippery flush toilet (ARSFT), demonstrated an exceptional ability to repel synthetic feces and various other substances tested by the researchers. Nothing adhered to the surface; instead, everything slid smoothly down, reminiscent of the slippery characteristics of pitcher plants that served as inspiration for this toilet's design.
The researchers reported, "The as-prepared ARSFT remains clean after contacting with various liquids such as milk, yogurt, highly sticky honey, and starch gel mixed congee, demonstrating excellent repellence to complex fluids. Notably, even after being abraded to 1,000 cycles of abrasion using sandpaper, the ARSFT maintains its record-breaking super-slippery capability."
The durability of this toilet bowl is a crucial factor, as past attempts to develop non-stick toilet surfaces often succumbed to wear and tear from repeated flushing. Thus, an option that retains its slippery properties over time presents a much more promising replacement for conventional materials.
The 3D printing technique allowed the scientists to introduce some porosity to the surface while incorporating silicon oil as a lubricant. Both innovations contributed to the non-stick qualities of this smaller-sized toilet bowl.
Furthermore, the lubricant can be easily replenished to sustain the bowl's ultra-slippery surface. The reduced water consumption required for flushing and cleaning would quickly accumulate significant water savings, particularly when considering the vast number of toilets globally.
Although the modern flushing toilet has only been in use for a couple of centuries, it currently consumes over 141 billion liters of fresh water daily worldwide—almost six times the daily water consumption of Africa. In a world grappling with limited access to safe, clean water, exacerbated by climate change, innovations like this one hold the potential to make a substantial difference. However, further development and scaling of this concept are now required.
The researchers emphasized, "The concept of the 3D-printed object with superior abrasion-resistant slippery ability will improve the development of super-slippery materials and further save water consumption in human society."
The findings from this research have been published in Advanced Engineering Materials.
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