Electroosmotic drive module, implanted electroosmotic micropump device, and an electricity leading out method
An electroosmotic drive module comprises: a porous dielectric film; two electrodes respectively provided on opposite sides of the porous dielectric film; and a porous insulating layer, one electrode being disposed between the porous dielectric film and the insulating layer. An implantable electroosmotic micropump comprises a housing, and at least one electroosmotic drive module is provided in the housing. There are a plurality of electroosmotic drive modules, and the plurality of electroosmotic drive modules are connected in series end to end, such that heterogeneous integrated assembly between different materials such as electrodes, films, and housings can be achieved.
1 . An electroosmotic drive module, comprising:
a porous dielectric film;
two electrodes, which are arranged on two opposite sides of the porous dielectric film respectively; and
a porous insulation layer, one of the two electrodes being arranged between the porous dielectric film and the porous insulation layer,
wherein the porous insulation layer has a thickness greater than a thickness of a combination of the two electrodes and the porous dielectric film.
2 . The electroosmotic drive module according to claim 1 , wherein a pore wall of the porous insulation layer is provided with an electroosmosis inhibiting coating.
3 . An implantable electroosmotic micropump device, comprising a housing and at least one electroosmotic drive module according to claim 1 which is arranged in the housing, wherein an inner wall of the housing is provided with a liquid filling groove.
4 . The implantable electroosmotic micropump device according to claim 3 , wherein there are a plurality of the electroosmotic drive modules, which are connected in series from head to tail, and the porous insulation layer of one of the plurality of the electroosmotic drive modules is arranged at the other one of the two electrodes of another one of a plurality of the electroosmotic drive modules.
5 . The implantable electroosmotic micropump device according to claim 4 , further comprising:
two electrode conductive wires, which are arranged on an outer wall of the housing, wherein the housing is provided with electricity lead-out ports, and the two electrode conductive wires are electrically connected with the electrodes through the electricity lead-out ports.
6 . The implantable electroosmotic micropump device according to claim 5 , wherein the electrodes have electrode lead-out pins, the electrode conductive wires have conductive wire connecting pins, and the electrode lead-out pins pass through the electricity lead-out ports and are connected with the conductive wire connecting pins.
7 . The implantable electroosmotic micropump device according to claim 5 , wherein the electrodes are connecting sheets, the electrode conductive wires have conductive wire connecting pins, and the conductive wire connecting pins pass through the electricity lead-out ports and are connected with the electrodes.
8 . An electricity leading out method of the implantable electroosmotic micropump device according to claim 6 , comprising the following steps:
arranging the two electrode conductive wires on the outer wall of the housing, connecting the electricity lead-out pins, the conductive wire connecting pins, the electrode lead-out pins or the electrodes respectively by metal wires, and welding connection points of the electrode lead-out pins of the two electrodes, the conductive wire connecting pins of the two electrode conductive wires, the electricity lead-out pins or the two electrodes;
filling the electricity lead-out ports and the connection points with a biocompatible material; or
patterning the outer wall of the housing by using a mask; and
forming the electrode conductive wires on the patterned outer wall of the housing; simultaneously forming a metal connection layer on the electricity lead-out ports, the electrode lead-out pins or the electrodes, and filling the electricity lead-out ports and the metal connection layer with a biocompatible material.
9 . The electricity leading out method of the implantable electroosmotic micropump device according to claim 8 , wherein the electrode conductive wires are formed on the housing through a process of depositing, sputtering, electroplating or electroless plating.
10 . The electroosmotic drive module according to claim 1 , wherein a size of each pore in the porous insulation layer is greater than a size of each pore in the porous dielectric film.
11 . The electroosmotic drive module according to claim 1 , wherein the thickness of the porous insulating layer is at least five times the thickness of the porous dielectric film.
12 . An assembly method of an electroosmotic drive module, comprising the following steps:
arranging a first electrode on one side of a first porous insulation layer, arranging a second electrode on one side of a porous dielectric film, and then fixing the side of the porous insulation layer that is provided with the first electrode with a side of the porous dielectric film that is not provided with second electrode together; or
arranging the first and second electrodes on two opposite sides of the porous dielectric film respectively, and then fixing the first porous insulating layer with the side of the porous dielectric film that is provided with the first electrode, and fixing a second porous insulating layer with the side of the porous dielectric film that is provided with the second electrode; or
arranging the first electrode on one side of the first porous insulating layer, arranging the second electrode on one side of the second porous insulating layer, then fixing the side of the first porous insulation layer that is provided with the first electrode with a first side of the porous dielectric film, and fixing the side of the second porous insulation layer that is provided with the second electrode with a second side of the porous dielectric film opposite from the first side,
wherein each of the first and second porous insulation layers has a thickness greater than a thickness of a combination of the first and second electrodes and the porous dielectric film.
13 . The electroosmotic drive module according to claim 12 , wherein a size of each pore in the first and second porous insulation layers is greater than a size of each pore in the porous dielectric film.
14 . The electroosmotic drive module according to claim 12 , wherein the thickness of the first and second porous insulating layers is at least five times the thickness of the porous dielectric film.