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An ortho-experiment design and the analysis method of mathematical statistics are adopted to study the conversion of gypsum and potassium chloride to potassium sulfate in the system of K+ , Ca2', NH: 1) C1-, SO:-in H2O. Optimal reaction parameters and engineering mean are acquired to attain a conversion yield of potassium chloride of 94.52%.

With the increasing demand for self-adaptive electronics, stretchable and conformable sensors with merits of high sensitivity, stretchability, and self-adhesive have taken great proportion on the advanced intelligent devices. Herein, a novel tactile sensor that can always maintain conformal contact to the measuring object for efficient movement monitoring was demonstrated, whose structure contains the “H” well-manicured thermoplastic elastomer (TPE), rectangular PVDF film coupled with silver electrode and clamped into the copper-clad signal line ends (CCSLE), and “U” shaped super-elastic silica gel layer, can satisfy the above performances to the maximum extent. Thus, by ingenious designing and association, the output signals of the arch device have been explored, which can serve as dynamic monitoring sensor owing to the stretchable and conformal configuration. Besides, the mechanical stability, high sensitivity suggested that when attached to the skin of participates’ joints, the sensor would be able to detect strains induced by different motion postures, and it was confirmed in the paper experimentally. The results show that the novel biomimetic sensor is effective in monitoring human dynamic, with a success rate of more than 98.3 percent. The stretchable and conformable sensor is highly used for low-cost, non-toxic, breathable, and has further potential in clinical, conformal detection, and artificial intelligence.

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