| 摘要 |
A method for manufacturing a filter is introduced. Firstly, a polyurethane material including a urethane-based main chain having a repeat unit of the formula, (R-NH-COO-R-O-NH)n, with a plurality of contaminants absorbed around the urethane-based main chain is provided. Then, an extraction is performed to remove the contaminants from the urethane-based main chain so as to reveal a plurality of absorption sites for trapping cyanides, phenols, or polynuclear aromatic compounds.
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