Method and apparatus for producing large uniform thickness nanomaterial sheets
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United States of America Patent
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Feb 27, 2018
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app pub date -
Feb 21, 2014
filing date -
Feb 21, 2014
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Abstract
A batch-automated microfiltration press for producing large uniform thickness nanomaterial sheets includes a filtration envelope of variable size that is defined between an upper platen having a fixed position and a lower platen disposed in spaced apart, parallel relation to the upper platen. The upper platen has a plurality of input nozzles and a plurality of flow dispersers associated with each of the input nozzles. Nanoparticles are deposited onto a fine filter membrane positioned in the filtration envelope. Flow channels and drain holes are formed in the lower platen. Each of the flow channels has a non-linear path of travel. A closed-loop fluid control system maintains a predetermined rate of nanoparticle deposition onto the fine filter membrane. A motion control system controls the raising and the lowering of the lower platen, maintaining a constant displacement instead of constant pressure, enabling the production of clean, undamaged sheets of nanomaterial papers.
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