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Self-Healing Material FlexHeal Goes Commercial: Phone Cases Auto-Repair Scratches at Room Temperature Within 24 Hours

FlexHeal uses microcapsule self-healing polymer technology. Repair agents embedded in the case material automatically release at scratch sites and solidify, restoring surface integrity without external intervention.

Self-Healing Material FlexHeal Goes Commercial: Phone Cases Auto-Repair Scratches at Room Temperature Within 24 Hours

On November 1, 2030, Samsung Electronics unveiled the Galaxy Z Flip Flex in Seoul, the world's first smartphone equipped with FlexHeal self-healing material. The phone's casing uses a polymer material containing microcapsule repair agents. When scratches appear on the surface, the microcapsules rupture at the scratch site and release the repair agent, automatically healing scratches up to 0.3mm deep at room temperature within 24 hours.

The FlexHeal technology was developed by a team led by Professor Kim Youn-soo of the Korea Advanced Institute of Science and Technology (KAIST). The principle involves uniformly dispersing microcapsules approximately 50 micrometers in diameter within the polymer matrix. Each capsule encapsulates a liquid repair agent — a two-component epoxy resin. When a crack forms on the material surface, it punctures the microcapsules along its path. The released repair agent fills the crack through capillary action and subsequently solidifies under catalysis by moisture in the air.

Professor Kim stated in his paper: "FlexHeal can self-heal surface scratches approximately 100 to 300 micrometers deep. For deeper damage, repair effectiveness is limited. However, over 90% of surface scratches from daily use fall within this range."

Samsung demonstrated FlexHeal's effectiveness in a live demo: a key was used to forcefully scratch the back of the phone, leaving a visible mark. After 24 hours, the mark had nearly vanished completely. After 48 hours, microscopic examination revealed that the surface roughness of the scratched area had recovered to over 95% of its original level.

The Galaxy Z Flip Flex is priced at $1,299, approximately $200 more than the non-self-healing version in the same series. Samsung plans to expand FlexHeal technology to its tablet and laptop product lines by 2031.

The KAIST team is researching second-generation FlexHeal technology, targeting a repairable scratch depth of 1 millimeter and a healing time reduced to 6 hours.