Through the test of CH4 displaced by CO2 using the coal sample as the adsorbent, this paper has found the coalbed methane (CBM) displacement desorption phenomenon under the natural conditions and CBM mining conditions...Through the test of CH4 displaced by CO2 using the coal sample as the adsorbent, this paper has found the coalbed methane (CBM) displacement desorption phenomenon under the natural conditions and CBM mining conditions. With the help of the adsorption theory of the modern physical chemistry and interfacial chemistry, the CBM competitive adsorption and displacement desorption mechanism are intensively discussed, and a new path for studying the CBM desorption mechanism in the CBM exploitation process is explored.展开更多
Photochromic liquid crystal polymer(LCP)films can undergo spontaneous mechanical deformations upon light illuminations.The light-induced strain is due to photoisomerization and the nematic–isotropic phase transition....Photochromic liquid crystal polymer(LCP)films can undergo spontaneous mechanical deformations upon light illuminations.The light-induced strain is due to photoisomerization and the nematic–isotropic phase transition.A gradient strain exists due to absorption decay of the light intensity and will produce bending of LCP strips.Beam bending models are studied for single layered and bilayered LCP strips with substrate.The results show that the multilayered structures can have much larger bending curvature due to the utilization of the average light-induced contractions which were mostly not active for single-layered LCPs.Some structural optimizations for bilayered laminate are also discussed.展开更多
文摘Through the test of CH4 displaced by CO2 using the coal sample as the adsorbent, this paper has found the coalbed methane (CBM) displacement desorption phenomenon under the natural conditions and CBM mining conditions. With the help of the adsorption theory of the modern physical chemistry and interfacial chemistry, the CBM competitive adsorption and displacement desorption mechanism are intensively discussed, and a new path for studying the CBM desorption mechanism in the CBM exploitation process is explored.
基金support of the National Natural Science Foundation of China(No.11072062&10772049)the High Technology Develop Program of China(863 Program:2009AA04Z408).
文摘Photochromic liquid crystal polymer(LCP)films can undergo spontaneous mechanical deformations upon light illuminations.The light-induced strain is due to photoisomerization and the nematic–isotropic phase transition.A gradient strain exists due to absorption decay of the light intensity and will produce bending of LCP strips.Beam bending models are studied for single layered and bilayered LCP strips with substrate.The results show that the multilayered structures can have much larger bending curvature due to the utilization of the average light-induced contractions which were mostly not active for single-layered LCPs.Some structural optimizations for bilayered laminate are also discussed.
