

Often manufacturers and consumers mistakenly believe that silicones are oil-derived petrochemicals, whereas, they are actually synthetic products prepared from sand or quartz, among the most abundant minerals on earth. Silicon (Si) is the second most abundant element on Earth it chemically bonds to oxygen, as silica, that is SiO2, the natural basis of sand.



Silicones are available in numerous formats providing the formulator with endless possibilities to introduce luscious softness and shine to hair care products, luxurious texture to skin preparations with excellent spreading, long-lasting and protecting effects. A unique and multifunctional set of properties combine to ensure silicones stay at the top of the formulator’s toolkit, delivering superior aesthetics and unmatched, cost-effective, sensory benefits. Collectively, the results demonstrate that the designed LFCIg appears unparalleled advantages and presents wide application potential in flexible robotics, e-skin and physiological signal monitoring.Silicone chemistry is playing an increasingly important role in modern personal care and cosmetic formulations. More impressively, the e-skin with tactile sensing functions is produced by in-situ 3D printing of sensor arrays on flexible electrodes to detect slight weight objects and recognize the resulting spatial pressure variations. Moreover, the conductive elastomer based on LFCIg have been developed into a stretchable strain sensor that achieves accurate response recognition, classification, and identification of different robot gestures. The double-network LFCIg is cross-linked by dynamic non-covalent bonds, which exhibits excellent mechanical properties (2100% strain while sustaining fracture strength of 1.23 MPa) and >90% self-healing efficiency, and others superb electrical conductivity of 23.3 mS m-1 and 3D printability. In this work, the liquid-free conductive ionogel (LFCIg) with excellent performance was fabricated by utilizing the innovative double network design approach based on deep eutectic solvent (DES). Nonetheless, conductive elastomers typically exhibit prominent problems such as solvent volatilization and leakage, poor mechanical and conductive properties, which limit their applications in electronic skin (e-skin). Conductive elastomers with both softness and conductivity are widely used in the field of flexible electronics.
