Lipase Immobilization on Oleic Acid−Pluronic (L-64) Block Copolymer Coated Magnetic Nanoparticles, for Hydrolysis at the Oil/Water Interface

2008 ◽  
Vol 47 (17) ◽  
pp. 6379-6385 ◽  
Author(s):  
Iram Mahmood ◽  
Chen Guo ◽  
Hansong Xia ◽  
Junhe Ma ◽  
Yangyang Jiang ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Block Copolymer ◽  
Water Interface ◽  
Lipase Immobilization ◽  
Oil Water

Lipase immobilization on ionic liquid-modified magnetic nanoparticles: Ionic liquids controlled esters hydrolysis at oil-water interface

AIChE Journal ◽  
2011 ◽  
Vol 58 (4) ◽  
pp. 1203-1211 ◽  
Author(s):  
Yangyang Jiang ◽  
Chen Guo ◽  
Hongshuai Gao ◽  
Hansong Xia ◽  
Iram Mahmood ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Water Interface ◽  
Lipase Immobilization ◽  
Oil Water ◽  
Modified Magnetic Nanoparticles

Interfacial self-assembly of amphiphilic conjugated block copolymer into 2D nanotapes

Soft Matter ◽  
2019 ◽  
Vol 15 (43) ◽  
pp. 8790-8799 ◽  
Author(s):  
Xiao-Shuai Guo ◽  
Ze-Kun Zhang ◽  
Tian-Yu Zhang ◽  
Zai-Zai Tong ◽  
Jun-Ting Xu ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Acrylic Acid ◽  
Self Assembly ◽  
Conjugated Polymer ◽  
Water Interface ◽  
Oil Water ◽  
Assembly Behavior ◽  
Poly Acrylic Acid

In the present work, the evaporation-induced interfacial self-assembly behavior of an amphiphilic conjugated polymer, poly(3-hexylthiophene)-b-poly(acrylic acid) (P3HT-b-PAA), at the oil–water interface is explored.

Interfacial and Demulsification Properties of Janus Type Magnetic Nanoparticles

2015 ◽  
Vol 1105 ◽  
pp. 264-268
Author(s):  
Nisar Ali ◽  
Qiu Yu Zhang ◽  
Bao Liang Zhang ◽  
Wajid Zaman ◽  
Sarmad Ali
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Research Work ◽  
Water Interface ◽  
Water Droplets ◽  
Janus Nanoparticles ◽  
Natural Surfactants ◽  
Oil Water ◽  
Emulsified Water ◽  
Solvent Washing

Water-in-oil emulsions are formed during crude oil production. Some natural surfactants (asphaltenes) aggregates are known to form viscoelastic film preventing coalescence of emulsified water droplets. The present research work investigates the interfacial properties and demulsifying capacity of Janus type magnetic nanoparticles. poly (methylmethacrylate-acrylicacid-divinylbenzene) iron oxide Janus nanoparticles with Interfacially active P(MMA-AA-DVB) block copolymer and iron oxide (magnetic) shows excellent interfacial and magnetic properties. Experiments performed at the oil-water interface indicates that Janus particles adsorb at the oil - water interface and separate the emulsified water from the external magnetic field. The external magnetic play important role demulsification of magnetically tagged emulsified water droplets, producing smaller volumes of sludge and decrease the hydrocarbon loss to waste aqueous phase. The chemical bonding of interfacially active P(MMA-AA-DVB) grafted with magnetic nanoparticles and the magnetic property of P(MMA-AA-DVB)/Fe3O4 allowed the used Janus nanoparticles to be readily recycled by magnetic separation and regenerated by solvent washing.

Porous materials from cellulose nanocrystal and mxene surfactants at the oil/water interface

2020 ◽  
Author(s):  
Bingqing qian ◽  
Haiqiao Wang ◽  
Dong Wang ◽  
Hao-Bin Zhang ◽  
Jessica Wu ◽  
...  
Keyword(s):  
Porous Materials ◽  
Cellulose Nanocrystal ◽  
Water Interface ◽  
Oil Water

Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements

1991 ◽  
Vol 56 (1) ◽  
pp. 112-129 ◽  
Author(s):  
Takashi Kakiuchi ◽  
Mitsugi Senda
Keyword(s):  
Charge Transfer ◽  
Numerical Calculation ◽  
Supporting Electrolyte ◽  
Water Interface ◽  
Migration Effect ◽  
Ac Current ◽  
Stationary Interface ◽  
Oil Water ◽  
Anion Transfer

We have estimated the degree of polarizability of a polarized oil-water interface used as a working interface and that of the nonpolarizability of a nonpolarized interface used as a reference oil-water interface from the numerical calculation of dc and ac current vs potential behavior at both interfaces. Theoretical equations of dc and ac currents for simultaneous cation and anion transfer of supporting electrolytes have been derived for the planar stationary interface for reversible and quasi-reversible cases. In the derivation, the migration effect and the coupling of the cation and anion transfer have been incorporated. The transfer of ions constituting a supporting electrolyte contributes to the total admittance of the interface even in the region where the interface may be considered as polarized in dc sense, as pointed out first by Samec et al. (J. Electroanal. Chem. 126, 121 (1981)). Moreover, the reference oil-water interface is not ideally reversible, so that the contribution from this interface to the measured admittance cannot be negligible, unless the area of the reference oil-water interface is much larger than that of the working oil-water interface. The effect of non-ideality of the reference oil-water interface on the determination of double layer capacitances and kinetic parameters of charge transfer at the working oil-water interface has been estimated.

Metal–Phenolic Network Covering on Zein Nanoparticles as a Regulator on the Oil/Water Interface

2020 ◽  
Vol 68 (31) ◽  
pp. 8471-8482
Author(s):  
Di Wu ◽  
Yalei Dai ◽  
Yunan Huang ◽  
Jin Gao ◽  
Hongshan Liang ◽  
...  
Keyword(s):  
Water Interface ◽  
Oil Water
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