Papers by Author: Dong Qi Liu

Abstract: In this article we successfully prepared calamine / sodium alginate viscose fiber. Good dispersion and stability of the modified solution was prepared by dispersing calamine in alkaline solution of sodium alginate, and then mixed it with viscose spinning solution by spinning injection methods. Moreover, the stability of calamine / sodium alginate solution, the effect of concentration of calamine on the fiber properties is studied in this paper. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and physical mechanical performance are test to characterize the structure and the performance of the calamine / sodium alginate viscose fiber.

Abstract: In this study, polyvinylidene fluoride/liquid crystal polymer (PVDF/LCP) blending membranes were prepared via phase-inversion. LCP is ethyl cellulose (EC) dissolved into acrylic acid (AA). The properties of these blends were measured by differential scanning calorimeter (DSC) and polarizing microscope. The results indicate that LCP formed at the concentration of 0.60g/ml and the blends begin to be observed the presence of liquid crystal. Moreover, at a certain temperature range, higher temperature can quicken the formation of liquid crystal. With the adding of LCP, the cholesteric liquid crystal can be still retained in the blending membranes, but the solution enthalpy decreased.