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THEi faculty and students develop dust-transforming coatings for pollutants

2016-06-20View Original

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Air pollution has become a concern in recent years, with one of the main causes being the large amount of marble dust released during the cutting of marble. **The Higher Education Institute of Technology (THEi) has collaborated with Nanyang Polytechnic in Singapore to develop a coating using biomimetic technology, combining marble powder with nano-silicone compounds to create a material that is waterproof, oil-resistant, and dust-proof.   Marble powder is itself industrial waste; when manufacturing building materials, workers must cut marble, during which a large amount of marble dust is released. In addition to causing damage to workers’ lungs and respiratory tract, it also leads to severe air pollution. Wang Yuanhao, a senior distinguished professor in the Department of Building Technology and Engineering at THEi College of Technology, together with several faculty members and students, as well as the School of Chemistry and Life Sciences at Nanyang Polytechnic in Singapore, are using nanotechnology to convert pollutants into useful materials.   Wang Yuanhao said that to create a coating that is waterproof, oil-resistant, and dust-proof, 100 grams of marble powder and 1 gram of nano-silicone compound are first mixed in a beaker. After undergoing a reaction at 100 degrees Celsius and 8 atmospheres of pressure, the process is completed in about six hours. Through this high-temperature and high-pressure process, strong chemical bonds are formed between the two components, thereby achieving a complete and thorough surface modification. The paint produced has passed safety tests conducted by Nanyang Polytechnic in Singapore, proving to be non-toxic to the environment and human health.   He noted that the new type of coating can be applied to various surfaces, including building concrete, glass facades, brick walls in homes, and even metals such as steel and aluminum. Thanks to its superhydrophobic cleaning property, when rain falls on the surface coated with this material, the lotus effect is created, which helps to wash away dust from the surface.   He believes that even though homes are prone to humidity and mold, this coating prevents moisture from penetrating the walls, **reducing the likelihood of mold formation.   Looking ahead to future development, the next step is to add a sterilization function to enhance the functionality of the coatings, and to transform construction waste into functional materials.   Tan Jiayu, a fourth-year student in Environmental Engineering and Management at THEi who was involved in the research, said that her graduation project was similar to the type of research conducted this time. She admitted that she learned a great deal from Wang, noting that although she had heard of literature reviews before, actually carrying out one out is a different matter – it’s not easy at all.

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