Papers by Author: Jie Zhang

Abstract: In this paper, the hot water extraction conditions of mycelium polysaccharide of Tricholoma mongolium were investigated. By single-factor experiments, ethanol amount was determined at three times and the other factors (liquid–solid ratio, extraction temperature and time) were chosen to further optimize extraction conditions using response surface methodology (RSM). The Center Composite experimental results showed the optimum extraction conditions as follows: a temperature of 85.38°C, a liquid–solid ratio of 31.78 g/ mL and a extraction time of 2.18 h. Under these conditions, two extractions sufficiently reached the maximal the rate of mycelium polysaccharide 7.23%.

Abstract: Stir-froth-polymerization is a novel technique for producing highly porous ceramics, in which bubbles are formed by a mechanical frothing in aqueous slurry of ceramic powders. Many work had be done about the porosity, the permeability and the mechanical strength of the porous ceramics derived from this method, but there are still a lot of things remain unclear. This paper focuses on the mechanism of frothing, and the influence of parameters in the mechanical frothing. It was found that the stir time, the stir speed and the viscosity of the slurry have influence on the average cell-size and the distribution of them respectively. The average cell-size can be controlled in the range from 60 to 160 μm by adjusting the parameters.