| Abstract:The feasibility and process conditions of heat insulation paper manufacture based on in-situ synthesis of calcium silicate in the lumen or cell wall of the hardwood pulp fibers were investigated. Under the optimal experimental conditions the heat insulation paper was made. The concentration of calcium chlorine is 1.25 mol/L, the beating degree of the pulp is 57°SR, the stirring rate is 300 r/min, the reaction temperature, the mixing time and the reaction time are 60℃ and 30 min and 20 min respectively. Under these conditions, ash content of the heat insulation paper reaches to 24.6% and its surface temperature is 19℃ lower than the control sample. The synthetic product, microstructure and properties of the heat insulation paper were observed and measured by SEM-EDAX, FT-IR, XRD analysis, respectively. The results indicated that the manufacture condition is easy to fulfill; the calcium silicate deposits on the fiber surface, in the cell wall and lumen of the pulp fibers; the calcium silicate paper has very good heat insulation property. |
