In an era where electronic devices are becoming increasingly thin, light, and precise, even a micro-crack in sealing materials can lead to complete device failure. Recently, a domestic materials R&D team has successfully developed "self-healing fluorosilicone rubber." By introducing dynamic disulfide bonds into the molecular chain, the material can "automatically heal" like skin after being damaged, extending the sealing life of electronic devices by more than 3 times and providing more reliable material support for emerging products such as foldable smartphones and wearable devices. According to the R&D team, while traditional fluorosilicone rubber has excellent high-temperature and oil resistance, its molecular chains are prone to irreversible breakage under long-term mechanical stress or extreme conditions, forming micro-cracks. The new self-healing fluorosilicone rubber embeds dynamic disulfide bonds (-S-S-) in its molecular backbone. When the material is damaged by external force, the broken disulfide bonds can recombine at room temperature or under slight heating (60°C) to achieve "self-healing." Experiments show that after being cut, the material can recover more than 90% of its original strength in just 30 minutes, and the sealing performance after healing is no different from that of new material. In addition, the material retains the chemical corrosion resistance and high/low temperature resistance (-50°C to 220°C) of fluorosilicone rubber, while its tear strength is increased by 40% through nano-silica reinforcement. Currently, this technology has been applied to scenarios such as foldable smartphone hinge seals and smartwatch waterproof rings, and is expected to achieve large-scale mass production in the second half of 2026. Industry experts point out that the breakthrough in self-healing materials not only solves the pain point of "one-time damage" in electronic devices but also provides a brand-new material solution for the development of future flexible electronics and foldable devices, marking a key step for China in the field of high-end sealing materials.
IOTA FLSR3435 room temperature curing liquid fluorosilicone rubber