Invention Grant
- Patent Title: Fiber-based adsorbents having high adsorption capacities for recovering dissolved metals and methods thereof
- Patent Title (中): 用于回收溶解金属的吸附能力高的纤维类吸附剂及其方法
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Application No.: US13553288Application Date: 2012-07-19
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Publication No.: US08722757B2Publication Date: 2014-05-13
- Inventor: Christopher J. Janke , Sheng Dai , Yatsandra Oyola
- Applicant: Christopher J. Janke , Sheng Dai , Yatsandra Oyola
- Applicant Address: US TN Oak Ridge
- Assignee: UT-Battelle, LLC
- Current Assignee: UT-Battelle, LLC
- Current Assignee Address: US TN Oak Ridge
- Agency: Warner Norcross & Judd LLP
- Main IPC: C08F2/46
- IPC: C08F2/46 ; C08G61/04

Abstract:
A fiber-based adsorbent and a related method of manufacture are provided. The fiber-based adsorbent includes polymer fibers with grafted side chains and an increased surface area per unit weight over known fibers to increase the adsorption of dissolved metals, for example uranium, from aqueous solutions. The polymer fibers include a circular morphology in some embodiments, having a mean diameter of less than 15 microns, optionally less than about 1 micron. In other embodiments, the polymer fibers include a non-circular morphology, optionally defining multiple gear-shaped, winged-shaped or lobe-shaped projections along the length of the polymer fibers. A method for forming the fiber-based adsorbents includes irradiating high surface area polymer fibers, grafting with polymerizable reactive monomers, reacting the grafted fibers with hydroxylamine, and conditioning with an alkaline solution. High surface area fiber-based adsorbents formed according to the present method demonstrated a significantly improved uranium adsorption capacity per unit weight over existing adsorbents.
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