Synthesis and chemical modification of poly(butylene succinate) with rutin useful to the release of silybin

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.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Silva

Oliveira

Filho

et al. 2018

“…Those properties allow them to be used in the distinct applications, such as packaging or structures, replacing petrochemical polymers . Besides that, since these biomaterials mostly do not generate byproducts harmful to the human body, they are also can be used in the medical area, especially in drug delivery applications …”

Section: Introductionmentioning

confidence: 99%

“…[2] Besides that, since these biomaterials mostly do not generate byproducts harmful to the human body, they are also can be used in the medical area, especially in drug delivery applications. [3][4][5][6] Among green polymers, the poly (butylene succinate) (PBS) is obtained by the polycondensation of 1,4-butanediol and succinic acid. [7][8][9][10][11][12][13] PBS is an aliphatic, thermoplastic, and crystalline polyester with excellent thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Poly (Butylene Succinate)‐g‐Poly(Hydroxypropyl Methacrylate) as a New Meloxican Delivery System

Costa

Pinto

Nascimento

et al. 2018

The use of biopolymer‐based drug delivery systems is increasing in the pharmaceutical area due to them biodegradable and biocompatible properties. In this work, a poly (butylene succinate) (PBS) grafted with poly (hydroxypropyl methacrylate) (PHPMA), PBSgPHPMA, is prepared using maleic unsaturations inserted in the PBS chain during its synthesis. Several characterization techniques are used to study the homopolymers and the grafted material. Among them, Fourier Transform Infrared (FTIR), Thermogravimetric analysis (TGA) Differential scanning calorimetry (DSC), and X‐ray diffraction (XRD) allowed inferring the obtaining of the aimed materials. Also, the copolymer is used to prepare microparticles containing Meloxicam by emulsification and solvent evaporation method. These microparticles are tested as drug delivery systems under pH 8.5 (gastrointestinal) and pH 5.5 (skin). The primary results allowed inferring that the grafted material can be used as a drug delivery system, showing that the release rate at pH 5.5 allowed the slower delivery rate among tested materials.

“…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 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.