Root-soil structure inspired hydrogel microspheres with high dimensional stability and anion-exchange capacity.

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    • Source:
      Publisher: Academic Press Country of Publication: United States NLM ID: 0043125 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-7103 (Electronic) Linking ISSN: 00219797 NLM ISO Abbreviation: J Colloid Interface Sci Subsets: PubMed not MEDLINE
    • Publication Information:
      Publication: Orlando, FL : Academic Press
      Original Publication: New York.
    • Abstract:
      Ion exchange materials show great advantages in water purification, food industry, pharmaceutical industry, etc. However, the ion exchange capacities of ion exchange materials, especially for anion-exchange materials, at present are still relatively low. Hydrogels own abundant functional groups and show high hydrophilicity, and thus are recognized as high-potential ion exchange materials, but may deform and even crush in use due to their low mechanical strength and unavoidable swelling behavior. In this study, inspired by the root-soil structure, novel poly(methacryloxyethyltrimethyl ammonium chloride) composite hydrogel microspheres with ultrahigh ion exchange capacity (more than 3.8 meuqiv/g), low swelling ratio (less than 1.5 g/g under pH = 7), and ultrahigh mechanical strength (more than 28.1 MPa) were prepared. The microspheres showed efficient adsorption for anionic dyes (1491 mg/g for methyl orange, 1693 mg/g for Congo red, and 204.7 mg/g for amaranth, respectively) and great adsorption for bilirubin (131.6 mg/g). Taken together, the hydrogel microspheres were qualified as stable and high-efficiency ion exchange materials. More importantly, the root-soil structure opens up avenues for enhancing the dimensional stability of functional hydrogels.
      (Copyright © 2018 Elsevier Inc. All rights reserved.)
    • Contributed Indexing:
      Keywords: Hydrogel microsphere; Poly(methacryloxyethyltrimethyl ammonium chloride); Restricted swelling behavior; Root-soil structure; Ultrahigh ion exchange capacity; Ultrahigh mechanical strength
    • Publication Date:
      Date Created: 20180820 Date Completed: 20180917 Latest Revision: 20180917
    • Publication Date:
      20231215
    • Accession Number:
      10.1016/j.jcis.2018.08.036
    • Accession Number:
      30121520