Green polyurethane synthesis by emulsion technique: a magnetic composite for oil spill removal

The interest in magnetic nanoparticles has been growing in recent years, several fields of research are exploring the properties of these materials. Among them, the authors can mention the inclusion of these nanoparticles in materials that perform the cleaning of oil spills, thus producing easy contaminant removal from the place by the aid of the action of a magnetic field. Several materials can be used aiming to this purpose. However, to the best of our knowledge, alkyd resins filled with lignin has never been used as oil spill cleanup tools. So, these materials are prepared and tested using several techniques, such as FTIR, SEM, and XRD. Besides that, the oil spill cleanup capability of the prepared materials is also tested. According to the exponential model used to describe the oil spill cleanup experiments, the best material is able to remove (25 ± 2) g of petroleum from the water. Thus, the presented material can be used as an oil spill cleanup tool, reducing environmental impacts.

Section: Crude Oil Magnetic Removalmentioning

confidence: 99%

“…Nowadays, there is a worldwide concern about the sustainable use of natural resources. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Among available resources, the biodiesel is promising. Despite this, the biodiesel production generates glycerol as a byproduct.…”

Section: Introductionmentioning

confidence: 99%

Petroleum Sorbers Based on Renewable Alkyd Resin and Lignin

Marinho

Lima

Neves

et al. 2018

“…The maghemite was prepared by homogeneous co-precipitation, following the described procedure as published elsewhere. [3,4,[28][29][30][31][32][33][34][35][36][37][38][39][40][41] In a typical procedure, 25 mL of the aqueous solutions of FeCl 3 .6H 2 O (0.25 M) and FeSO 4 .7H 2 O (0.25 M) were mixed, under mechanical stirring at 600 rpm, at 30 C. Then, after 10 min, 20 mL of aqueous KOH solution (2 M) was added, inducing the formation of a black precipitate (magnetite). The resulting solution was kept under mechanical stirring for 30 min.…”

Section: Synthesis Of Magnetic Nanoparticlesmentioning

confidence: 99%

“…[1,2] Although most of the polymers of this group have a high resistance to hydrolysis, these have been studied due to their high biodegradability. [3,4] Among its applications, the production of paints, varnishes, [5] and foams [6] deserves particular attention. They can present different behaviors depending on their synthetic conditions and have considerable permeability, mainly since it can be controlled according to the ratio of their hydrophobic and hydrophilic chain moieties.…”

Section: Introductionmentioning

confidence: 99%

Glycerin‐Based Polyurethane Obtained by Inverse Emulsion: Comparison Between Magnetic Induction and Conventional Heating

Santiago

Silva

Marques

et al. 2018

This work studies the comparison of polyurethane particles obtained by heating through magnetic induction and conventional heating. The collected materials are characterized by Fourier transform infrared spectroscopy, Low‐Field Nuclear Magnetic Resonance Spectroscopy, Scanning Electron Microscopy, Particle Size Distribution, and Gel Fraction. Besides that, the magnetic force of the magnetite in glycerin suspension is performed. The obtained results allow inferring that the polyurethane particles obtained by magnetic induction exhibit properties close to the particles obtained by conventional heating. However, composite particles present a longer relaxation time than the one of the polyurethane, providing the highest toughness to the material. As the principal advantage, materials obtained by magnetic induction heating can be produced in a fraction of the time requested for the preparation of the similar materials obtained by conventional heating.

“…This can be a technological advantage since it could make the removal of material after crude oil absorption in a clean-up process easier, by the application of a magnetic field. [5,7,[17][18][19][20][21][22] Therefore, the scientific hypothesis of this study is that it is possible to produce better oil sorber materials, using crop wastes after simple acetylation processes with magnetic properties, which is able to present an on/off magnetic behavior, and which can be applied to remove crude oil from the water surface. To understand these obtained multiphase materials some analytical techniques were used in their characterization, including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic force and susceptibility, density, water absorption amount and oil removal capability.…”

Section: Introductionmentioning

confidence: 99%

Oil Spill Clean‐Up Tool Based on Castor Oil and Coffee Grounds Magnetic Resins

Silva

Oliveira

Filho

et al. 2018

Aiming to reduce the anthropogenic environmental impact some wastes can be used as raw material in other process. Considering that, coffee grounds powder before and after acetylation process were used as a filler in a new composite material that is able to clean up spilled oil from the surface of water. The polymeric matrix was a polyurethane and maghemite nanoparticles was used as filler to provide magnetic properties to the material. In this study, four different materials were prepared: the first was the resin matrix; the second was the composite containing only 5% w/w of magnetizable nanoparticles; the third was the composite containing 5% w/w of the magnetizable nanoparticles and 10% w/w of coffee grounds; and the last was similar the former but containing acetylated coffee grounds powder. All of the obtained materials were characterized by FTIR, XRD, TGA, magnetic force and susceptibility, density, water absorption amount and oil removal capability. The results showed that each gram of composite material containing 10% of coffee grounds powder was able to sorb (9.6 ± 0.5) grams of crude oil, while the composite containing the same amount of acetylated coffee grounds was able to remove (9.4 ± 0.6) grams of crude oil. The significant advantage of the acetylation process is the lower absorption of water in comparison to the non‐acetylated analogous material. The results demonstrated that the hydrophilic tendency decreases significantly. The water/oil ratio absorbed by the materials decreased from 1.07 when using composite containing coffee grounds, to 0.41 when composite containing acetylated coffee grounds was used.