To select the cementing and coating materials of slow/controlled-release fertilizer, the natural kaoline and abandoned foam plastics were used to prepare nano-subnanocomposites through the methods of organic material ...To select the cementing and coating materials of slow/controlled-release fertilizer, the natural kaoline and abandoned foam plastics were used to prepare nano-subnanocomposites through the methods of organic material intercalation, semiemulsification, and cut at high velocity techniques. Besides, two kinds of nano-subnanocomposites were tested in this study using several instruments, including the scanning electron microscope （SEM）, the X-ray diffraction （XRD）, the infrared ray spectrum （IR）, and the laser granularity. The main results were as follows： 1） The organic material was intercalated in the layers of kaoline clays, and the natural kaoline exfoliated into nanometer-sized layers. The organic agent and clays formed nanocomposites through hydrogen bond combination. 2） The SEM pictures of polystyrenestarch nano-subnanocomposites showed that many pores and rugas were present on the surface of film at sizes ranging from 10 to 20 nm. These nano-subnanocomposites were used as the cementing and coating materials of slow/controlledrelease fertilizer.展开更多
We achieve enhanced actuation of the 2^(nd)-order resonance of a microcantilever in a capacitive microcantilever structure featured by a dual coplanar counter electrodes configuration.A torque about the static point o...We achieve enhanced actuation of the 2^(nd)-order resonance of a microcantilever in a capacitive microcantilever structure featured by a dual coplanar counter electrodes configuration.A torque about the static point of the 2^(nd) eigenmode is generated in this configuration and therefore enables effective actuation of the 2^(nd)-order resonance.It is further confirmed that the torque has the effect of suppressing the 1^(st)-order resonance.As a result,the frequency response curve of the microcantilever beam can be modulated.Our results suggest that electric actuation of any higher-order resonances of the microcantilever can be realized through a rational design of counter electrodes.展开更多
文摘To select the cementing and coating materials of slow/controlled-release fertilizer, the natural kaoline and abandoned foam plastics were used to prepare nano-subnanocomposites through the methods of organic material intercalation, semiemulsification, and cut at high velocity techniques. Besides, two kinds of nano-subnanocomposites were tested in this study using several instruments, including the scanning electron microscope （SEM）, the X-ray diffraction （XRD）, the infrared ray spectrum （IR）, and the laser granularity. The main results were as follows： 1） The organic material was intercalated in the layers of kaoline clays, and the natural kaoline exfoliated into nanometer-sized layers. The organic agent and clays formed nanocomposites through hydrogen bond combination. 2） The SEM pictures of polystyrenestarch nano-subnanocomposites showed that many pores and rugas were present on the surface of film at sizes ranging from 10 to 20 nm. These nano-subnanocomposites were used as the cementing and coating materials of slow/controlledrelease fertilizer.
基金Supported by the National Natural Science Foundation of China under Grant No 60974117.
文摘We achieve enhanced actuation of the 2^(nd)-order resonance of a microcantilever in a capacitive microcantilever structure featured by a dual coplanar counter electrodes configuration.A torque about the static point of the 2^(nd) eigenmode is generated in this configuration and therefore enables effective actuation of the 2^(nd)-order resonance.It is further confirmed that the torque has the effect of suppressing the 1^(st)-order resonance.As a result,the frequency response curve of the microcantilever beam can be modulated.Our results suggest that electric actuation of any higher-order resonances of the microcantilever can be realized through a rational design of counter electrodes.
