Cellulose Acetate Nanofiber and Sodium Alginate-Based Conductive Aerogel for Human Motion Monitoring

At present, flexible sensors are a hot spot in research and experimental development, but the research on flexible sensors that can be used for human motion monitoring still needs to be deepened. In this work, the green material cellulose acetate (CA) was used as the matrix material, the film was made by electrospinning, crushed by a cell grinder and sodium alginate (SA) was added to promote the uniform dispersion of nanofibers in water, and then methyltrimethoxysilane (MTMS) and MXene nanosheet dispersion were added to make it hydrophobic and good conductivity, and the aerogel precursor solution was prepared, and then the CA/SA/MTMS/MXene aerogel with directional holes was prepared by directional freeze-drying. As a flexible sensor material, it can be used for human wear, monitoring the electrical signals generated by the movement of human joints and other parts, and can still maintain a current of about 0.2 mA after 1000 compression cycles, with good current stability, and is widely used in the field of monitoring human movement. Furthermore, the water contact angle of CA/SA/MTMS/MXene aerogel is maintained above 120° and still shows strong hydrophobicity, which implies that the aerogel has the piezoresistive sensing potential under sweating conditions of the human body.