Compared with room temperature, the responsive curve of polymer humidity sensor usually presents a nonlinear shift and distortion at higher temperature conditions, this will sharply decrease the accuracy and working stability of polymer humidity sensor. In this paper, an organic–inorganic cross-linked interpenetrating network (c-IPN) between silocane compounds and acrylic prepolymer resin has been constructed to prepare a c-IPN humidity-sensitive material by in-situ crosslinking reaction. The results shows that the prepared c-IPN polymer humidity sensor shows more sensitive in range of 30–90% RH, with higher linearity coefficient of 0.9996 and lower hysteresis coefficient of 1.25% RH. And the c-IPN polymer humidity sensor exhibits more higher stability at higher temperature than that at room temperature. Meanwhile, the temperature coefficient of the c-IPN polymer humidity sensor can decrease to 0.53% RH/°C, along with temperature hysteresis curve linear coefficient increase to (R 2 = −0.999), when (3-aminopropyl) triethoxysilane is used at dosage of 10 wt.% druing crosslinking reaction. This study presents a feasible practical technical solution for developing novel high-performance polymer humidity-sensitive materials and its humidity sensors at wider temperature range.
Superhydrophobic coatings with unique self-cleaning phenomenon and have been studied in the fields of photovoltaics, concrete, windows, vehicle housings, and so on. However, obtaining self-cleaning coatings with excellent performance through a simple process and at a low cost is a difficult challenge. In this study, a simple dip-coating process was used to prepare a highly transparent superhydrophobic self-cleaning coating, with a bilayer structure consisting of a hexamethyldisilazane-modified silica antireflective buffer layer and an epoxy-modified silicone/fumed silica superhydrophobic surface layer. Due to the addition of the buffer layer, the structure of the coated surface is more regular, resulting in the coated glass having a transmittance 4.3 % higher than the bare glass and achieving a static water contact angle of 155.1° and a sliding angle of 0.1°, demonstrating excellent self-cleaning performance. The cross-linking curing of the silicone resin allows the coating to demonstrate stability in a variety of extreme environments. Therefore, the use of coated glass to encapsulate photovoltaic cells resulted in a significant increase in photovoltaic conversion efficiency, and the cell performance remained unchanged after contamination and self-cleaning procedures. This low-cost strategy is expected to increase photovoltaic cell power generation and address the problem of degraded device performance due to surface contamination.
危险品化学品经营许可证（带存储）