Recently, researchers at Jinan University published a paper on "ACS Sustainable Chemistry & Engineering", which introduced the successful preparation of conductive composites with high tensile strength, high elasticity and high cost performance by solvent mixing-spraying-rolling into a cylinder.
The composite material is prepared by spraying the chitin nanocrystal reinforcing natural rubber latex and carbon black by thermal spraying on the glass carrier layer by layer; after drying, the multilayer composite material is uniformly peeled off from the glass sheet. And rolling up to prepare a conductive composite material having a spiral structure.
The composite had a conductivity of 6.92 S/m at a carbon black content of 4.44%. The 5% chitin nanocrystals were doped into the composite with a tensile strength of 3.47 MPa, which is about 3.1 times that of the natural rubber carbon black composite control sample. The strain sensor has a high strain gauge sensitivity coefficient (GF≈5), conductivity stability in a small deformation range, and still exhibits good stability under strain conditions of 25%, 50% and 100% strain. Recoverability.
High-sensitivity strain sensors are further used to monitor human activities such as finger movement and pronunciation, resulting in good reproducibility and reliability. The study developed a highly stretchable, versatile strain sensor based on a simple, inexpensive material that opens up new opportunities for the development of scalable electronic devices.
