Abstract
This article describes the synthesis and application of hydrogel adsorbents for lithium ion (Li+) recovery from seawater. The monodisperse hydrogel adsorbent particles of crosslinked poly(N-isopropylacrylamide-co-methacryloyloxymethyl-12-crown-4) [P(NIPAAm-co-M12C4)] were prepared using droplet microfluidics. For selective binding of Li+, methacryloyloxymethyl-12-crown-4 (M12C4) was synthesized from 2-hydroxymethyl-12-crown-4 and methacryloyl chloride. M12C4 was then used as a comonomer in the photo-polymerization of aqueous droplets containing N-isopropylacrylamide (NIPAAm) and N,N′-methylenebisacrylamide (MBA) in the presence of 2,2-diethoxyacetophenone (DEAP) under 365 nm UV irradiation. The chemical composition and morphology of P(NIPAAm-co-M12C4) hydrogel adsorbents were analyzed by IR, NMR, optical microscopy, and SEM techniques. Inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectrometry (ICP-OES) analyses revealed 89% Li+ adsorption efficiency with high selectivity among several different metal ions from artificial seawater and a maximum adsorption of 1.4 mg Li+/g hydrogel adsorbent achieved within 20 min.
| Original language | English |
|---|---|
| Pages (from-to) | 10656-10661 |
| Number of pages | 6 |
| Journal | RSC Advances |
| Volume | 5 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 2015 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
Cite this
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Hydrogel adsorbents of poly(N-isopropylacrylamide-co-methacryloyloxymethyl-12-crown-4) for Li+ recovery prepared by droplet microfluidics. / Kim, Yong Seok; Lee, Hyang Moo; Kim, Jung Hyun; Joo, Jin; Cheong, In Woo.
In: RSC Advances, Vol. 5, No. 14, 2015, p. 10656-10661.Research output: Contribution to journal › Article
TY - JOUR
T1 - Hydrogel adsorbents of poly(N-isopropylacrylamide-co-methacryloyloxymethyl-12-crown-4) for Li+ recovery prepared by droplet microfluidics
AU - Kim, Yong Seok
AU - Lee, Hyang Moo
AU - Kim, Jung Hyun
AU - Joo, Jin
AU - Cheong, In Woo
PY - 2015
Y1 - 2015
N2 - This article describes the synthesis and application of hydrogel adsorbents for lithium ion (Li+) recovery from seawater. The monodisperse hydrogel adsorbent particles of crosslinked poly(N-isopropylacrylamide-co-methacryloyloxymethyl-12-crown-4) [P(NIPAAm-co-M12C4)] were prepared using droplet microfluidics. For selective binding of Li+, methacryloyloxymethyl-12-crown-4 (M12C4) was synthesized from 2-hydroxymethyl-12-crown-4 and methacryloyl chloride. M12C4 was then used as a comonomer in the photo-polymerization of aqueous droplets containing N-isopropylacrylamide (NIPAAm) and N,N′-methylenebisacrylamide (MBA) in the presence of 2,2-diethoxyacetophenone (DEAP) under 365 nm UV irradiation. The chemical composition and morphology of P(NIPAAm-co-M12C4) hydrogel adsorbents were analyzed by IR, NMR, optical microscopy, and SEM techniques. Inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectrometry (ICP-OES) analyses revealed 89% Li+ adsorption efficiency with high selectivity among several different metal ions from artificial seawater and a maximum adsorption of 1.4 mg Li+/g hydrogel adsorbent achieved within 20 min.
AB - This article describes the synthesis and application of hydrogel adsorbents for lithium ion (Li+) recovery from seawater. The monodisperse hydrogel adsorbent particles of crosslinked poly(N-isopropylacrylamide-co-methacryloyloxymethyl-12-crown-4) [P(NIPAAm-co-M12C4)] were prepared using droplet microfluidics. For selective binding of Li+, methacryloyloxymethyl-12-crown-4 (M12C4) was synthesized from 2-hydroxymethyl-12-crown-4 and methacryloyl chloride. M12C4 was then used as a comonomer in the photo-polymerization of aqueous droplets containing N-isopropylacrylamide (NIPAAm) and N,N′-methylenebisacrylamide (MBA) in the presence of 2,2-diethoxyacetophenone (DEAP) under 365 nm UV irradiation. The chemical composition and morphology of P(NIPAAm-co-M12C4) hydrogel adsorbents were analyzed by IR, NMR, optical microscopy, and SEM techniques. Inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectrometry (ICP-OES) analyses revealed 89% Li+ adsorption efficiency with high selectivity among several different metal ions from artificial seawater and a maximum adsorption of 1.4 mg Li+/g hydrogel adsorbent achieved within 20 min.
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U2 - 10.1039/c4ra11527a
DO - 10.1039/c4ra11527a
M3 - Article
AN - SCOPUS:84921685625
VL - 5
SP - 10656
EP - 10661
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 14
ER -