摘要:
Disclosed is ink for ink jet printing, which comprises: metal nanoparticles comprising a surfactant attached to surfaces thereof; and a first solvent, wherein the metal nanoparticles are present in an amount of 50˜70 parts by weight based on 100 parts by weight of the ink, and the surfactant is present in an amount of 0.5˜5 parts by weight based on 100 parts by weight of the metal nanoparticles. Metal nanoparticles used in the ink and a method for preparing the metal nanoparticles are also disclosed. The method for preparing metal nanoparticles for use in ink for ink jet printing comprises a step of washing surplus surfactant with at least one solvent. By doing so, the surplus surfactant remaining on the surfaces of the metal nanoparticles can be minimized, resulting in a drop in viscosity of ink comprising the metal nanoparticles. Therefore, even if the ink has a metal nanoparticle content of 50 wt % or more, the ink can satisfy a viscosity condition required for ink jet printing, and thus can form an electrode pattern with high conductivity.
摘要:
The detachable electric headrest includes a headrest pole, an ascending and descending slider, elastic pins, and locking bars. The headrest pole is configured such that engaging depressions are formed in the lower end portion thereof. The ascending and descending slider is provided with detachment depressions, into which the respective lower end portions of the headrest pole are inserted, and is mounted to the fastening bracket of a seat frame so as to be raised and lowered. The elastic pins are mounted in the respective detachment depressions so as to be inserted into the engaging depressions of the inserted headrest pole. The locking bars are configured such that cut depressions, in which the elastic pins can be moved, are formed in respective upper ends thereof, and are configured to be elastically supported to the ascending and descending slider.
摘要:
Disclosed is a method for preparing a porous carbon structure, the method comprising the steps of: (a) mixing a carbon precursor, a pyrolytic template, which is pyrolyzed at the carbonization temperature of the carbon precursor or removed by post-treatment after the carbonization of the carbon precursor so as to form pores, and a solvent, to prepare a spray solution; and (b) subjecting the spray solution either to spray pyrolysis or to spray drying and then spray pyrolysis, so as to form a carbonized carbon structure, and then removing the template from the carbon structure. A mesoporous spherical carbon prepared according to the disclosed method may have a large specific surface area and a large pore volume through the control of the kind and concentration of template, and thus can be used in a wide range of applications, including catalysts, adsorbents, electrode materials, materials for separation and purification, and materials for storing hydrogen and drugs.
摘要:
The detachable electric headrest includes a headrest pole, an ascending and descending slider, elastic pins, and locking bars. The headrest pole is configured such that engaging depressions are formed in the lower end portion thereof. The ascending and descending slider is provided with detachment depressions, into which the respective lower end portions of the headrest pole are inserted, and is mounted to the fastening bracket of a seat frame so as to be raised and lowered. The elastic pins are mounted in the respective detachment depressions so as to be inserted into the engaging depressions of the inserted headrest pole. The locking bars are configured such that cut depressions, in which the elastic pins can be moved, are formed in respective upper ends thereof, and are configured to be elastically supported to the ascending and descending slider.
摘要:
Disclosed are viologen derivatives as an electrochromic material having improved stability and lifetime, a metal oxide electrode including the same, and an electrochromic device using the viologen derivative as an electrochromic material. The viologen derivative includes a suitable regulator group capable of increasing ΔE that is a potential difference between E1 (potential at the first redox reaction) and E2 (potential at the second redox reaction). When ΔE increases, the mole fraction of viologen molecules present in the second reduction state decreases. Therefore, it is possible to lower the mole fraction of viologen molecules present in an irreversibly reduced state at an applied potential, thereby increasing the lifetime of an electrochromic material and an electrochromic device.
摘要:
Disclosed is an electrochromic device comprising: (a) a first electrode; (b) a second electrode; (c) an electrochromic material; and (d) a gel polymer electrolyte containing an ionic liquid. A method for manufacturing the same is also disclosed. The electrochromic device uses a gel polymer electrolyte comprising an ionic liquid. Therefore, there is no problem related with electrolyte leakage. Additionally, it is possible to manufacture electrochromic devices by using plastic materials, because the ionic liquid gel polymer electrolyte permits structural deformation with ease. Further, because the electrochromic device uses an ionic liquid, it is possible to minimize side reactions between constitutional elements of an electrochromic device and electrolyte.
摘要:
Disclosed is ink for ink jet printing, which comprises: metal nanoparticles comprising a surfactant attached to surfaces thereof; and a first solvent, wherein the metal nanoparticles are present in an amount of 50˜70 parts by weight based on 100 parts by weight of the ink, and the surfactant is present in an amount of 0.5˜5 parts by weight based on 100 parts by weight of the metal nanoparticles. Metal nanoparticles used in the ink and a method for preparing the metal nanoparticles are also disclosed. The method for preparing metal nanoparticles for use in ink for ink jet printing comprises a step of washing surplus surfactant with at least one solvent. By doing so, the surplus surfactant remaining on the surfaces of the metal nanoparticles can be minimized, resulting in a drop in viscosity of ink comprising the metal nanoparticles. Therefore, even if the ink has a metal nanoparticle content of 50 wt % or more, the ink can satisfy a viscosity condition required for ink jet printing, and thus can form an electrode pattern with high conductivity.
摘要:
The shape of a locker provided in a locking assembly for a seat slide mechanism is modified into a cylindrical structure with a circular cross section so as to exhibit a higher mechanical rigidity as compared to a conventional plate type locker. Thereby, effectively preventing a half-locked condition. A reinforced channel structure, of a combined hook configuration, enables an upper reinforced channel and a lower reinforced channel to perform mutual locking against upward loads, thus effectively preventing damage of the rail assembly upon the exertion of a load of a three-point-type seat belt for the middle or second seat.
摘要:
Provided is an analog front end of a digital TV, a digital TV system having the same, and a method of operating the same. The analog front end includes: a first selection circuit which selectively outputs differential sound intermediate frequency signals or differential TV broadcast signals in response to a first selection signal; a second selection circuit which outputs a clock signal among a plurality of clock signals having a different sampling frequencies, in response to a second selection signal; and an analog-to-digital converter which converts output signals output from the first selection circuit to a digital code, according to a sampling frequency of a clock signal output from the second selection circuit.