The properties of polyoxyethylene polymers with temperature-sensitive and instant-solubility

Fei, Yumei; Gou, Shaohua; He, Yang; Zhou, Lihua; Peng, Chuan; Zhang, Huichao; Zhang, Qin; Wu, Yuanpeng

doi:10.1016/j.molliq.2018.10.016

Cited by 6 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accompanied by the formation of the ATPS, the system was divided into a hydrophobic phase, where E-1006 is located, and a hydrophilic phase, where (NH 4 ) 2 SO 4 is located. The Fourier Transform Infrared Spectroscopy (FTIR) analysis results (Figure 6) show that the characteristic absorption peak at a wavenumber of 1100 cm −1 corresponds to the ether bond (C-O-C) in the molecular structure of E-1006 [26]. The position of this peak is 1100 cm −1 in pure E-1006 and 1099 cm −1 in E-1006 at pH 7.0.…”

Section: Effect Of Phmentioning

confidence: 99%

Efficient Separation of Re (VII) and Mo (VI) by Extraction Using E-1006–Ammonium Sulfate Aqueous Two-Phase System

Fan,

Li,

Dai

et al. 2024

Separations

View full text Add to dashboard Cite

Aqueous two-phase extraction (APTE) stands out as an environmentally friendly technique for the separation of metal ions. The separation of Re (VII) and Mo (VI) in an aqueous solution was investigated using a novel aqueous two-phase system (ATPS) consisting of isodecanol polyoxyethylene ether (E-1006), ammonium sulfate, and water. A phase diagram of this system was developed, and the effects of pH, temperature, extraction time, the concentrations of E-1006 and (NH4)2SO4, and metal ions on the separation of Re (VII) and Mo (VI) were examined. The results show that at pH 7.0, Mo (VI) had almost transformed into the (NH4)2SO4-rich phase, while Re (VI) was extracted into the E-1006-rich phase. The increase in temperature induces a transition of Mo (VI) to the salt-rich phase, which is unfavorable for the extraction of Re (VII). The increase in the concentrations of E-1006 and (NH4)2SO4 has a positive effect on the separation of rhenium and molybdenum. Overall, the ATPS consisting of 200 g/L of E-1006, 200 g/L of (NH4)2SO4, and water yields an extraction efficiency of 97.2% for Re and a high separation factor of 2700 for Re (VII) and Mo (VI) from a mixture of 0.1 g/L of Re (VII) and 5 g/L of Mo (VI) at pH 7.0 and 323.15 K. Separation studies of the simulated leaching solution show that the extraction efficiency for Re (VI) is 99.1% and the separation factor of Re (VII) and Mo (VI) is 5100.

show abstract

Section: Effect Of Phmentioning

confidence: 99%

Efficient Separation of Re (VII) and Mo (VI) by Extraction Using E-1006–Ammonium Sulfate Aqueous Two-Phase System

Fan,

Li,

Dai

et al. 2024

Separations

View full text Add to dashboard Cite

show abstract

“…Pei et al [14] synthesized PNIPAM-grafted modified starch-based nanoparticles as bio-based pickering stabilizers which could be used to stabilize oil-in-water emulsions. In addition, thermoresponsive polymers of PNIPAM have also been used in wastewater treatment [15,16], oil extraction [17], and other fields.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Study of HTPB-g-(PNIPAM/PEG) Thermoresponsive Polymer Brush

Bi,

Zhu,

Tian

et al. 2024

Polymers

View full text Add to dashboard Cite

In recent years, a great deal of work has been devoted to the development of thermoresponsive polymers that can be made into new types of smart materials. In this paper, a branched polymer, HTPB-g-(PNIPAM/PEG), with polyolefin chain segments as the backbone and having polyethylene glycol (PEG) and poly(N-isopropylacrylamide) (PNIPAM) as side chains was synthesized by ATRP and click reactions using N3-HTPB-Br as the macroinitiator. This initiator was designed and synthesized using hydroxyl-terminated polybutadiene (HTPB) as the substrate. The temperature-responsive behavior of the branched polymer was investigated. The lower critical solution temperature (LCST) of the branched polymer was determined by ultraviolet and visible spectrophotometry (UV-vis) and was found to be 35.2 °C. The relationship between the diameter size of micelles and temperature was determined by dynamic light scattering (DLS). It was found that the diameter size changed at 36 °C, which was nearly consistent with the result obtained by UV-vis. The results of the study indicate that HTPB-g-(PNIPAM/PEG) is a temperature-responsive polymer. At room temperature, the polymer can self-assemble into composite micelles, with the main chain as the core and the branched chain as the shell. When the temperature was increased beyond LCST, the polyolefin main chain along with the PNIPAM branched chain assembled to form the nucleus, and the PEG branched chain constituted the shell.

show abstract

“…For example, the poly(N-isopropylacrylamide)modified nylon membrane and the wax-based Janus particles can circularly separate various stable emulsions through the wettability adjustment of the designated temperature. 21,22 The multi-responsive molecules with some specific units, such as spiropyran, N-isopropylacrylamide, and acrylic acid, could at the same time exhibit a desirable adjustability of surface properties. 23,24 Lowering the pH or exchanging imine deprived the amphiphilic properties of materials, allowing the wetting manipulation of the interfaces for drug release and emulsion separation.…”

Section: Introductionmentioning

confidence: 99%

“…Such a process is typically triggered by temperature, , pH, , light irradiation, − CO 2 /N 2 injection, , magnetic field, − etc., so they are also known as the responsive molecules named after the triggers. For example, the poly(N-isopropylacrylamide)-modified nylon membrane and the wax-based Janus particles can circularly separate various stable emulsions through the wettability adjustment of the designated temperature. , The multi-responsive molecules with some specific units, such as spiropyran, N-isopropylacrylamide, and acrylic acid, could at the same time exhibit a desirable adjustability of surface properties. , Lowering the pH or exchanging imine deprived the amphiphilic properties of materials, allowing the wetting manipulation of the interfaces for drug release and emulsion separation. − The magnetic iron oxide nanoparticles grafted with hydrophobic and hydrophilic monomers also showed excellent responsive performance in Pickering emulsification and various phase separations. − The analogous strategies have been extensively reported and applied in various emulsions, broadening the scope of applications.…”

Section: Introductionmentioning

confidence: 99%

Novel Strategy of Polymers in Combination with Silica Particles for Reversible Control of Oil–Water Interface

Sun

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Hybrid smart emulsification systems are highly applicable in manipulating oil-in-water (O/W) droplets. Herein, novel switchable block polymers containing both zwitterionic and tertiary amine pendent groups were designed and synthesized to combine with charged silica particles to stabilize the O/W emulsion responsive to pH. This study was carried out in O/W emulsions stabilized with the polymer and silica particles under different pH conditions. The emulsion system was also simulated using molecular dynamics simulation to reveal the mechanism at molecular levels, thus gaining insight into the relationships between the emulsifying properties and the molecular interaction of the mixed system. Upon acidification of the continuous aqueous phase, protonated polymers with excellent hydrophilicity were induced by charged silica particles to cause rapid emulsion coalescence. In alkaline media, the mixed system conversely stabilized the O/ W emulsions, cutting polymer consumption by over three-quarters. The emulsification and demulsification can be switched alternately by tuning the pH conditions. The applications exhibited excellent efficiency in separating heavy oil/water emulsions and proved the high conversion rate in emulsion polymerization. Overall, with this novel strategy to relieve tedious modifications on particle surfaces and massive consumption of polymers, the designed responsive emulsification systems can impart intelligent and controllable chemical reactivity to emulsions on demand in a more affordable and sustainable way.

show abstract

The properties of polyoxyethylene polymers with temperature-sensitive and instant-solubility

Cited by 6 publications

References 30 publications

Efficient Separation of Re (VII) and Mo (VI) by Extraction Using E-1006–Ammonium Sulfate Aqueous Two-Phase System

Efficient Separation of Re (VII) and Mo (VI) by Extraction Using E-1006–Ammonium Sulfate Aqueous Two-Phase System

Preparation and Performance Study of HTPB-g-(PNIPAM/PEG) Thermoresponsive Polymer Brush

Novel Strategy of Polymers in Combination with Silica Particles for Reversible Control of Oil–Water Interface

Contact Info

Product

Resources

About