Alkyl Amine Salt And Lactic Acid Metal Complexes Of Crystal Structure And Thermal Chemical Research

In recent years, phase change materials have caused extensive concern in thefield of energy utilization and material science. Phase change energy storagetechnology can solve the contradiction of energy supply and demand in time andspatial. Therefore it is an effective way to improve energy utilization. The developedcountries in which energy storage technology application has been relatively mature,have invested heavily in the development of new energy storage technology andenergy storage materials, expecting these materials to be technical, economical andreliant. Our country has carried out active research and made great achievements inthis field.Carbohydrate can provide energy and carbon for organisms. Themonosaccharides often contain3-6carbon atoms in nature. There are many kinds ofmonosaccharides acid in organisms, such as glucose acid, ribonucleic acid and lacticacid. Thess monosaccharides have their physiological functions and nutritional valuein organism respectively. We have found by the experimental study and clinicalapplication that complexes of monosaccharide acids combinding metal elements haveeven more significant physiological activity and nutritional value for the organisms.In order to explore the complex, we need accurate thermodynamic data for theindustrial alapplication and related theoretical research.In this paper, main works of this thesis are as follows:1. Twelve kinds of phase change materials and ten kinds of lactates weresynthesized respectively. The compositions and spatial structures of the complexeswere characterized by element analysis and X-ray single crystal diffraction technique.The lattice potential energies were calculated based on the crystal data.According to Pitzer’s electrolyte solution theory, the molar solution enthalpy oflactates which are very soluble in water at infinite dilution (sH m) and Pitzer’sparameters were obtained at298.18K. Thermal anomaly in the heat capacity curveswas further studied by. The possible mechanism of thermal decomposition for eachcomplexes was speculated by TG/DSC method. 2. The heat capacities of the compounds have been measured by a precisionautomatic adiabatic calorimeter in the temperature range from78to400K. Thepolynomial equations were fitted using the least-square method, and the temperature,enthalpy, entropy of the phase change, and some thermodynamic functions such asentropy, enthalpy, Gibbs free energy relative to298.15K were calculated.