Magnetic and Hydrophobic Composite Polyurethane Sponge for Oil–Water Separation

Peng, Jiang; Li, Kun; Xi-quan, Chen; Dan, Ruiqi; Yu, Yang

doi:10.3390/app10041453

Cited by 18 publications

(8 citation statements)

References 50 publications

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“…This polyurethane foam (PUF) is naturally hydrophilic due to the carboxyl and amino groups. However, its hydrophilic nature can be converted by proper modification of its surface (Dat et al, 2022; Jiang et al, 2020). As it has a large surface area with a porous nature its adsorption is very highly suitable to remove oil contaminants from water (Kong et al, 2021).…”

Section: Green‐synthesized Polymer Nanoparticles For Organic Pollutan...mentioning

confidence: 99%

Biogenic polymer nanoparticles to remove hydrophobic organic contaminants from water

Kathalingam,

Santhoshkumar,

Ramesh

et al. 2023

Water Environment Research

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Soil and water pollution is of significant concern worldwide because of the consequences of environmental degradation and harmful effects on human health. Water bodies are very much polluted from various organic and inorganic pollutants by different human activities, including industrial wastes. Environmental pollution remains high because of urbanization‐induced industrial developments and human lifestyle. It accumulates pollutants in the environment including plants and living organisms. Even mothers’ milk is poisoned because of the uncontrolled, widespread increase in pollution. The discharge levels of organic hydrophobic contaminants in the water and soil are increasing rapidly. This severe pollution must be remediated to upgrade the environment and ensure the safety of human beings. It is vital to eradicate soil and water pollution to guarantee sufficient food and water. Different techniques available to remove the pollutants vary according to the type of pollutants. Hydrophobic contaminants are more dangerous than heavy metals and other pollutants; they cannot be easily removed, requiring special care. Hydrophobic organoxenobiotics released in the environment pose severe contamination in soil and water. Therefore, developing efficient and cost‐effective processes is necessary to remove hydrophobic contaminants from soil and water. With nanoparticle‐mediated remediation techniques, the green‐synthesized nanoparticles exhibit improved performance. This review consolidates reports on the remediation techniques of hydrophobic contaminants, focusing on green‐synthesized remediation agents. The very limited works on green synthesis of polymeric nanoparticles, particularly polyurethane‐based materials for organic contaminants removal demands more attention on this area.

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Section: Green‐synthesized Polymer Nanoparticles For Organic Pollutan...mentioning

confidence: 99%

Biogenic polymer nanoparticles to remove hydrophobic organic contaminants from water

Kathalingam,

Santhoshkumar,

Ramesh

et al. 2023

Water Environment Research

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“…The TPU polymer with a hydrogenated polyisoprene soft segment exhibits obvious hydrophobicity with a water contact angle of 104.7° . The water contact angle of the TPU sponge prepared by a simple and low-cost process is 100°, which lays a foundation for the preparation of a composite TPU sponge for oil–water separation . The thermal conductivity of TPU aerogel synthesized from a small molecular monomer is as low as 33 mW m –1 K –1 .…”

Section: Introductionmentioning

confidence: 99%

“…21 The water contact angle of the TPU sponge prepared by a simple and low-cost process is 100°, which lays a foundation for the preparation of a composite TPU sponge for oil−water separation. 22 The thermal conductivity of TPU aerogel synthesized from a small molecular monomer is as low as 33 mW m −1 K −1 . 23 On the basis of the above results, the combination of TPU with PI can be a facile practical strategy to prepare PI-based composite aerogels with excellent performance.…”

Section: ■ Introductionmentioning

confidence: 99%

Fabrication and Characterization of a High-Strength Polyimide/Thermoplastic Polyurethane Composite Aerogel with Hydrophobicity and Low Thermal Conductivity

Nie

Zhao

et al. 2023

Langmuir

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Polyimide (PI) aerogel has surfaced in research and development as a result of its heat resistance, flame retardancy, and low dielectric constant. However, it is still a challenge to reduce the thermal conductivity while improving its mechanical strength and retaining hydrophobicity. Herein, the PI/thermoplastic polyurethane (TPU) composite aerogel was synthesized by coupling TPU with PI via a novel method of chemical imidization combined with freeze-drying technology. With this technique, PI aerogel with excellent comprehensive performance is produced. Interestingly, the volume shrinkage of the composite aerogel decreased from 24.14 to 5.47%, which leads to low density (0.095 g/cm3) and elevated porosity (92.4%). In addition, strong mechanical strength (1.29 MPa) and high hydrophobicity (123.6°) were achieved. More importantly, PI/TPU composite aerogel demonstrated a low thermal conductivity of 29.51 mW m–1 K–1 at ambient temperature. Therefore, PI/TPU composite aerogel can be a promising material for hydrophobic and thermal insulation applications.

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“…Among the few types of smart materials available to date is the porous polymeric matrix (PPM) containing magnetizable particles (MPs). PPM is a polyurethane sponge [ 1 , 5 , 6 ], and MP particles can be carbonyl iron microparticles [ 1 , 6 ], iron microparticles [ 7 ], magnetite nanoparticles [ 8 , 9 ], etc. The assembly of PPM with MPs forms what we call a magnetizable sponge (MS).…”

Section: Introductionmentioning

confidence: 99%

Magneto-Dielectric Effects in Polyurethane Sponge Modified with Carbonyl Iron for Applications in Low-Cost Magnetic Sensors

Bîcă

Iacobescu

2022

Polymers

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In this study, magnetizable polyurethane sponges (MSs) were obtained from commercial absorbent polyurethane sponges (PSs) doped with carbonyl iron microparticles (CIPs). Based on MSs, we manufactured cylindrical capacitors (CCs). The CCs were subjected to both a magnetic field and an alternating electric field, with a frequency of f=1 kHz. Using an RLC bridge, we measured the series electric capacitance, Cs, and the tangent of the loss angle, Ds. From the functions Cs=CsδCCs and Ds=DsδCCs, we extracted the components of the complex dielectric permittivity. It was found that the CIPs embedded in the MS matrix aggregated, leading to magneto-dielectric effects such as the enhancement of the complex dielectric permittivity components when applying the magnetic field as a principal effect and the enhancement of the electric capacitance and time constant of the capacitors as a secondary effect. The obtained results represent landmarks in the realization of low-cost magnetic field sensors, deformation and mechanical stress transducers in the robotics industry, etc.

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Magnetic and Hydrophobic Composite Polyurethane Sponge for Oil–Water Separation

Cited by 18 publications

References 50 publications

Biogenic polymer nanoparticles to remove hydrophobic organic contaminants from water

Biogenic polymer nanoparticles to remove hydrophobic organic contaminants from water

Fabrication and Characterization of a High-Strength Polyimide/Thermoplastic Polyurethane Composite Aerogel with Hydrophobicity and Low Thermal Conductivity

Magneto-Dielectric Effects in Polyurethane Sponge Modified with Carbonyl Iron for Applications in Low-Cost Magnetic Sensors

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