The effects of wood roughness, modification and sanding on the water contact angle values of pine spruce and aspen wood surfaces were evaluated. Contact angle values set by time linear part extrapolation give increase...The effects of wood roughness, modification and sanding on the water contact angle values of pine spruce and aspen wood surfaces were evaluated. Contact angle values set by time linear part extrapolation give increased values in comparison with ones obtained after water drop spreading on the surface. Water drop side-view contact angle along wood fiber directions is less influenced by surface roughness. Wood water activity （aw） can be used to ascertain available water content on surface.展开更多
ZnO whiskers with a length of 30-40μm and a diameter of about 1μm were synthesized by co-precipitation of ZnSO 4 and Na2CO3 solution at room temperature followed by hydrothermal treatment of the as-prepared Zn5(CO3)...ZnO whiskers with a length of 30-40μm and a diameter of about 1μm were synthesized by co-precipitation of ZnSO 4 and Na2CO3 solution at room temperature followed by hydrothermal treatment of the as-prepared Zn5(CO3)2(OH)6 precursor at 160 ℃for 6 h.The increase of the initial solution pH promotes the hydrothermal conversion of the particulate Zn5(CO3)2(OH)6 to ZnO whiskers.The presence of minor amount of EDTA in the hydrothermal solution promotes the one dimensional growth of ZnO whiskers,leading to the formation of ZnO whiskers with a length of 50-60μm and a diameter of 1-2μm.展开更多
文摘The effects of wood roughness, modification and sanding on the water contact angle values of pine spruce and aspen wood surfaces were evaluated. Contact angle values set by time linear part extrapolation give increased values in comparison with ones obtained after water drop spreading on the surface. Water drop side-view contact angle along wood fiber directions is less influenced by surface roughness. Wood water activity （aw） can be used to ascertain available water content on surface.
基金Project(50874066) supported by the National Natural Science Foundation of China
文摘ZnO whiskers with a length of 30-40μm and a diameter of about 1μm were synthesized by co-precipitation of ZnSO 4 and Na2CO3 solution at room temperature followed by hydrothermal treatment of the as-prepared Zn5(CO3)2(OH)6 precursor at 160 ℃for 6 h.The increase of the initial solution pH promotes the hydrothermal conversion of the particulate Zn5(CO3)2(OH)6 to ZnO whiskers.The presence of minor amount of EDTA in the hydrothermal solution promotes the one dimensional growth of ZnO whiskers,leading to the formation of ZnO whiskers with a length of 50-60μm and a diameter of 1-2μm.
