A stable and homogeneous PbS nanometer particle Wrapped in the Polymaleie Acid-Octadecanol monoester is obtained based on the reaction Ph2+ + H2S, the H2S is obtained from the hydrolysis of thioacetamide osmosing into...A stable and homogeneous PbS nanometer particle Wrapped in the Polymaleie Acid-Octadecanol monoester is obtained based on the reaction Ph2+ + H2S, the H2S is obtained from the hydrolysis of thioacetamide osmosing into the colloidal nucleus from the dispersing medium. The size of the PbS nanometer Particle is between 4 and 6 nm determined by TEM.展开更多
A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of fie...A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of field emission-scanning electron microscopy（FE-SEM） showed that 1-octadecanol was restricted in the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FT-IR） results showed that no chemical reaction occurred among the components of composite PCM in the preparation process. The gel-to-sol transition temperature of the composite PCMs containing DMDBS was much higher than the melting point of pure 1-octadecanol. The improvements in preventing leakage and thermal stability limits were mainly attributed to the synergistic effect of the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. Differential scanning calorimeter（DSC） was used to determine the latent heat and phase change temperature of the composite PCMs. During melting and freezing process the latent heat values of the PCM with the composition of 91% OD/3% DMDBS/6% EG were 214.9 and 185.9 kJ·kg-1, respectively. Its degree of supercooling was only 0.1 ℃. Thermal constant analyzer results showed that its thermal conductivity（κ） changed up to roughly 10 times over that of OD/DMDBS matrix.展开更多
文摘A stable and homogeneous PbS nanometer particle Wrapped in the Polymaleie Acid-Octadecanol monoester is obtained based on the reaction Ph2+ + H2S, the H2S is obtained from the hydrolysis of thioacetamide osmosing into the colloidal nucleus from the dispersing medium. The size of the PbS nanometer Particle is between 4 and 6 nm determined by TEM.
基金Funded by Science and Technology Support Program of Hubei Province of China(No.2015BAA111)
文摘A 1-octadecanol（OD）/1,3:2,4-di-（3,4-dimethyl） benzylidene sorbitol（DMDBS）/expander graphite（EG） composite was prepared as a form-stable phase change material（PCM） by vacuum melting method. The results of field emission-scanning electron microscopy（FE-SEM） showed that 1-octadecanol was restricted in the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. X-ray diffraction（XRD） and Fourier transform infrared spectroscopy（FT-IR） results showed that no chemical reaction occurred among the components of composite PCM in the preparation process. The gel-to-sol transition temperature of the composite PCMs containing DMDBS was much higher than the melting point of pure 1-octadecanol. The improvements in preventing leakage and thermal stability limits were mainly attributed to the synergistic effect of the three-dimensional network formed by DMDBS and the honeycomb network formed by EG. Differential scanning calorimeter（DSC） was used to determine the latent heat and phase change temperature of the composite PCMs. During melting and freezing process the latent heat values of the PCM with the composition of 91% OD/3% DMDBS/6% EG were 214.9 and 185.9 kJ·kg-1, respectively. Its degree of supercooling was only 0.1 ℃. Thermal constant analyzer results showed that its thermal conductivity（κ） changed up to roughly 10 times over that of OD/DMDBS matrix.
文摘Carbon nanotubes (CNTs) have attracted a greatdeal of interest since the landmark research of Iijimain 1991[1]. However, if CNTs were to achieve their
