In the near future, the clothes you’re wearing will automatically become looser and more breathable if it senses you’re hot, and tighter if it senses you’re cold. The “High-level Forum on International Development Trends of New Materials” initiated by the Chinese Academy of Engineering and others opened in Shanghai yesterday. Experts including more than 40 academicians from the materials field discussed: What are “materials newer than new materials”? One of them is smart materials that have sensing capabilities like “five senses” and can change their properties as needed, such as smart fiber materials that can be used in clothing.
At present, there are three main categories of smart materials that have been applied: ferroelectric piezoelectric materials that change according to different voltages, magnetostrictive materials that strain according to the strength of the magnetic field, and shape memory metals that can change back to their original shape.
The reporter learned that a team led by Ren Xiaobing, a “Yangtze River Scholar” in the materials discipline of Xi’an Jiaotong University, has successfully developed a new type of smart material-strain glass. It has a certain degree of flexibility and will not expand or shrink even if the temperature changes. It can also “shrink and expand” according to the application scenario. This new material can be used in terminals such as mobile phones and bracelets. It can also be turned into glass fiber and made into clothing. It can also be widely used in precision instruments. Ren Xiaobing explained that strained glass is actually a shape memory alloy doped with a few key impurities.
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