晶体材料及其混合物的潮解动力学传热模型 Heat transport model for the deliquescence kinetics of crystalline ingredients and mixtures
Na Li a, Lynne S. Taylor b, Lisa J. Mauer a, * a Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, United States b Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, United States
关键词:吸附速率,晶体材料,潮解,传热
Key words: Sorption rate, crystalline ingredients, deliquescence, heat transport
Abstract: Deliquescent crystalline solids undergo the first order dissolution process of deliquescence when the environmental relative humidity (RH) exceeds the deliquescence point (RH0). The rate at which deliquescence occurs increases as the RH increases above the RH0 in compressed disks of select deliquescent ingredients; however, a kinetic model for the deliquescence of powdered crystalline food ingredients and blends thereof has not been published. The water vapor sorption rates of commonly used powder food ingredients (citric acid, sodium chloride, sucrose, fructose, sorbitol, and xylitol) and blends were determined using a multi-sample gravimetric moisture sorption analyzer. The water vapor sorption rate was dependent on sample radius, temperature, and sample composition. The heat transport model for the deliquescence of compressed disks was successfully extended to the powder ingredients and blends. Such results enable further understanding of fundamental theories of deliquescence and provide a useful tool in the prediction of water vapor uptake rate during deliquescence in controlled RH chambers.