On May 2nd, a research team led by Ahn Suk-Kyun, a professor of the Department of Polymer Science and Engineering, developed materials applicable to 4D printing* technology and published them on the renowned journal "Small." In response, the Hyowon Herald conducted an interview with Prof. Ahn,

Q1. What material have you developed?

A1. We have developed a new method of material synthesis called liquid crystal elastomer that can be transformed into a desired form just by humidity control. We also applied this material to the 4D printing technology that can change shape and function over time by printing it directly through ink-writing which is a general method for 3D printing.

Q2. How is the newly developed material different from existing materials?

A2. Shape memory polymers and hydrogels have mainly been studied for 4D printing materials. Shape memory polymers are generally irreversible, and hydrogels can only be operated with water in them. However, the new material we designed can deform reversibly up to 400% while maintaining its solid state. These are the advantages above the existing materials.

Q3. How can we apply the new material to our lives?

A3. Since the new material we have designed changes its shape with humidity, and can also be produced into fiber form through the spinning process; it can be applied to smart clothes or shoes. 

Q4. What contributed to the success for research and any words for the students who are interested in developing new materials?

A4. Not only one, but many researchers participated in the study based on their expertise. Also, we have put in continuous efforts and patience for the research. It is important for the students who are interested in this area to be curious in various fields that require new materials, and to have opportunities to exchange ideas with lots of people studying in other majors such as physics, life sciences, medicine, and architecture.