Effect of cation alkyl chain length on 3-sulfopropylmethacrylate-based draw solutes having lower critical solution temperature

Moon, Jihyeon; Kang, Hyo

doi:10.1039/d2ra08068k

Cited by 7 publications

(2 citation statements)

References 89 publications

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“…The nearly negligible hydrolysis observed for HS FG ET2 in the presence of DIMCARB could be attributed to its cation and anion having the shortest alkyl chain length compared to other CO 2 -based alkyl carbamate ILs employed in this investigation . The smaller dimensions of the dimethylammonium cation and dimethylcarbamate anion would lead to greater prevalence of charge carriers and enhanced ion mobility due to the low composition of hydrophobic alkyl chains in the overall molecular structure . Furthermore, the increased ionic interaction among DIMCARB molecules significantly contributed to its high viscosity .…”

Section: Resultsmentioning

confidence: 84%

“…25 The smaller dimensions of the dimethylammonium cation and dimethylcarbamate anion would lead to greater prevalence of charge carriers and enhanced ion mobility due to the low composition of hydrophobic alkyl chains in the overall molecular structure. 36 Furthermore, the increased ionic interaction among DIMCARB molecules significantly contributed to its high viscosity. 37 This increased viscosity resulted in a slower mixing process, subsequently reducing the likelihood of collisions between the reactants at the enzyme's active site.…”

Section: ■ Introductionmentioning

confidence: 99%

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Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Ng,

Chan,

Tan

et al. 2024

ACS Sustainable Chem. Eng.

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The enzymatic hydrolysis of vegetable oil is hindered by the prolonged duration required for reaction completion. This study aimed to address this concern by employing low-cost CO 2based alkyl carbamate ionic liquids (ILs) as additives. First, the verification of the successful synthesis of these ILs was attained through FTIR spectra analysis, revealing distinct C−O stretching peaks at 1,408 and 1,621 cm −1 . Furthermore, the addition of carbamate ILs did not cause enzyme denaturation, as proven by the preservation of the native beta-sheet assignment within the lipase structure. The carbamate ILs also raised the enzyme's negative zeta potential and reduced the chances of aggregation. Among the carbamate ILs investigated, bis(2-ethylhexyl)-ammonium bis(2ethylhexyl)carbamate (DBCARB) was determined to be the most effective, owing to its hydrophobic properties and ability to optimize pH levels and expose the enzyme's active site to the outer surface. Through purification, 8 wt % DBCARB reached a near-optimal equilibrium free fatty acid yield (∼95 wt %) within 8 h with only 0.2 wt % lipase, signifying a notable enhancement compared to the 120 h required in the absence of DBCARB. These results highlight the potential of DBCARB in enhancing enzymatic hydrolysis and shortening reaction times.

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Section: Resultsmentioning

confidence: 84%

Section: ■ Introductionmentioning

confidence: 99%

Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Ng,

Chan,

Tan

et al. 2024

ACS Sustainable Chem. Eng.

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Enhanced forward osmosis desalination of brackish water using phase‐separating ternary organic draw solutions of hydroxypropyl cellulose and propylene glycol propyl ether

Ruzvidzo,

Kaur,

Jain

2024

Water Environment Research

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This study introduces draw solutions for application in forward osmosis (FO) processes, combining mono propylene glycol propyl ether (PGPE) with the cellulose derivative hydroxypropyl cellulose (HPC). A total of 16 unique single‐solute and ternary organic draw solutions were prepared and evaluated, leading to the selection of three promising solutions for further investigation. Notably, eight of the initial organic draw solutions demonstrated osmotic pressures exceeding 2.4 MPa. The dynamic viscosities of all draw solutions exhibited a significant reduction with increasing temperature. Among the investigated solutions, the 0.25HPC‐3.75PGPE demonstrated the most favorable FO performance, achieving average experimental water fluxes of 11.062 and 9.852 Lm−2 h−1 (LMH) against a 1 g/L NaCl brackish feed solution across two FO runs.Practitioner Points Hydroxypropyl cellulose (HPC, MW ~100,000) was mixed with propylene glycol propyl ether (PGPE) as draw solutes for FO processes. Seven combinations of HPC and PGPE produced osmolalities greater than 1000 mOsm/kg. 0.5HPC‐7.5PGPE ternary draw solution achieved experimental water fluxes of 11.062 and 9.852 LMH against 1 g/L NaCl brackish feed solution. Leveraging the LCSTs of these ternary organic solutions holds promise for improved separation and regeneration processes.

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Thermosensitive magnetic ionic liquids with different heterocyclic moieties as draw solutes for forward osmosis

Cho,

Kang

2024

Desalination

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Effect of cation alkyl chain length on 3-sulfopropylmethacrylate-based draw solutes having lower critical solution temperature

Abstract: The applicability of 3-sulfopropyl methacrylate-based ionic liquids having lower critical solution temperature characteristics as draw solutes for forward osmosis processes was investigated by varying the alkyl chain length of the cation.

Cited by 7 publications

References 89 publications

Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Enhanced forward osmosis desalination of brackish water using phase‐separating ternary organic draw solutions of hydroxypropyl cellulose and propylene glycol propyl ether

Thermosensitive magnetic ionic liquids with different heterocyclic moieties as draw solutes for forward osmosis

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Effect of cation alkyl chain length on 3-sulfopropylmethacrylate-based draw solutes having lower critical solution temperature

Abstract: The applicability of 3-sulfopropyl methacrylate-based ionic liquids having lower critical solution temperature characteristics as draw solutes for forward osmosis processes was investigated by varying the alkyl chain length of the cation.

Cited by 7 publications

References 89 publications

Low-Cost CO2-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Low-Cost CO2-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Enhanced forward osmosis desalination of brackish water using phase‐separating ternary organic draw solutions of hydroxypropyl cellulose and propylene glycol propyl ether

Thermosensitive magnetic ionic liquids with different heterocyclic moieties as draw solutes for forward osmosis

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Product

Resources

About

Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis

Low-Cost CO₂-Based Alkyl Carbamate Ionic Liquids for Accelerating Enzymatic Oil Hydrolysis