A5048627270- Natural Fiber Reinforced Composites
- Advanced Cellulose Research Studies
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Bamboo properties and applications
- Nanocomposite Films for Food Packaging
- Nanoparticle-Based Drug Delivery
- Moringa oleifera research and applications
- Hydrogels: synthesis, properties, applications
- Advanced Drug Delivery Systems
- Synthesis and properties of polymers
- Lignin and Wood Chemistry
- Polymer crystallization and properties
- Drug Solubulity and Delivery Systems
- Advanced Polymer Synthesis and Characterization
- Metallurgical Processes and Thermodynamics
- Biodiesel Production and Applications
- Thermochemical Biomass Conversion Processes
- Trypanosoma species research and implications
- Recycling and Waste Management Techniques
- Iron and Steelmaking Processes
- Polymer composites and self-healing
- Antimicrobial agents and applications
- Graphite, nuclear technology, radiation studies
- Iron oxide chemistry and applications
Universidade Federal de Ouro Preto
2014-2023
Universidade Federal do Rio de Janeiro
1997-2022
Universidade Federal de Minas Gerais
2021
Universidade Federal de São Carlos
2021
Weatherford College
2021
The expansion of Brazilian agricultural production was very important in the last decade. A number waste residues were produced showing an enormous potential for industrial crops and products. Sugarcane bagasse is most one it has been investigated chipboard panel's preparation. In this sense, work aims to develop, characterize compare panels made with sugarcane urea formaldehyde (UF) melamine (MF) resins. Panels obtained a mixture particles, like pine or eucalyptus, without paraffin...
There is a growing interest in cellulose nanofibrils from renewable sources for various industrial applications. However, there lack of information on arising bamboo pulps. Nanofibrils refined pulps, including bleached, unbleached, and unrefined/unbleached, were obtained by mechanical defibrillation use biodegradable composites. The influence processes, such as pulping refining unbleached well alkali pretreatments bleaching the chemical composition samples was analyzed. Morphological,...
This work describes the surface treatment of coconut fiber and its application in composite materials for reinforcement polypropylene. Before testing materials, susceptibility to chemical was characterized by exposure following: (1) hot water; (2) aqueous NaOH 2% (w/v); (3) a sequence treatments water, extran 20% (v/v), acetone/water 1:1 10% (w/v).The efficiency each evaluated Fourier transform infrared spectrometry analysis, indicating reduction C=O peak. Besides that scanning electron...
Summary Plastic films used to make market bags are based on polymers such as polyethylene, polystyrene and polypropylene. These materials require a long time degrade in the environment. Alternative technologies have been developed reduce degradation impact environment caused by conventional polymer materials, using pro‐degrading additives or development of biodegradable polymers. In Brazil, some city's laws use material production bags, but absence specific surveillance policies makes their...
Abstract Currently, there is a demand for new engineering materials presenting combination of strength, low density, processing easiness, and reduced costs. In this context, polymer matrix composites reinforced by natural fibers have been studied in recent years due to their ecological economic advantages. Some are still little explored literature despite great potential as reinforcement like Luffa cylindrica . The present work aims at the preparation characterization vinylester thermoset...
Benznidazole (BNZ) is the primary chemotherapeutic agent for treating Chagas' disease; however, its poor water solubility and irregular oral absorption lead to treatment failure in chronic phase. The aim of this work was investigate utility polymer hydroxypropyl methylcellulose (HPMC) controlling release BNZ from solid inclusion complexes with cyclodextrin overcome problem bioavailability. Preliminary studies were conducted solution using selected β-cyclodextrin derivatives according an...
There are few studies about Moringa oleifera derivates in polymer developments where vegetable oil was used as a plasticizer and biodegrading agent. The polymerization of moringa (MO) carried out assisted by microwaves without catalysts presence. aren't the MO using technology. Moringa's its (PMO) were agent for mixtures low density polyethylene (LDPE) with poly(butylene adipate-co-terephthalate)/poly(lactic acid) (PBAT/PLA). producted films that characterized submitted to biodegradation...
Selecting a polymer depends on its characteristics, the properties of drug and remaining ingredients in formulation. The drug, when incorporated into polymeric matrix, can show several advantages compared with conventional form. In this context, work describes preparation characterization polyethylene glycol (PEG 4000) derivative particles loaded benznidazole, as well evaluates their trypanocidal activity. work, reactions to modify PEG 4000 subsequent incorporation benznidazole were made....
Vegetable oils are used as a base for the synthesis of polymers and monomers with structures similar to that petroleum, plasticizers conventional biodegrading additives. The Moringa oleifera oil was extracted from seeds polymerized after being submitted 16 h microwave irradiation without catalysers. This polymer characterized efficiency polymerization verified by reduction double bonds increase molecular weight up 50,000 g mol−1. Films produced mixture low-density polyethylene (LDPE)...
Summary Copolymers are polymers consisting of different repeat units and their production is usually motivated by the changing properties. An important application transportation drugs within organism with aim controlling release substance. The synthesis these new copolymers based on simple semi‐synthesis low cost. synthetic routes interaction graft copolymer (PMMA‐g‐PEG) a variety reagents such as acetic anhydride, acid, methyl iodide, sulfuric acid hydrochloric acid. products from...
The aim of this work was to evaluate the oil extracted from Moringa oleifera (fam. Moringaceae) seeds nutritional standpoint. Nutritional evaluation crude or degummed moringa soybean (as a control) involved determination Food Efficiency (FE) in male Fisher rats and fatty acid composition oil. Hepatic renal functions were assessed by measuring serum transaminases activity urea creatinine concentrations, respectively. Serum cholesterol triglycerides, alkaline phosphatase, total proteins...
Synthetic polymers are made up of repeated monomeric units, and this gives them a very versatile appearance, making useful in many areas science. One is the pharmaceutical, which correlates properties polymer with active principle, so they can be used as an excipient or controlled release system. The PMMA‐g‐PEG4000 has characteristics derived from its precursors, that pharmacologically active. When we incorporate drugs into structure, act on release, lessening toxic character drug producing...
The insertion of functional groups in polymer compounds may facilitate their interaction with different drugs.PEG polymers are widely used for low melting point, toxicity, drug compatibility, and hydrophilicity.They as pharmaceutical excipients the formulation conventional or modified released drugs designed to be upgraded drug-modulating controllers at specific sites body.Indomethacin has been controlled release because it is a that have good polymers.The non-steroidal anti-inflammatory...
This article seeks to characterize the seed husk fiber of Moringa oleifera and understand its influence when added a cementitious composite, in terms mechanical performance. fibers were chemically physically tested composite. Specimens molded for Ultrasonic Speed Pulse test Uniaxial Compression Strength test, subsequent observation SEM. The results show with high lignin content absorption water. Adding water mixture is absorbed, which reduces formation hydrated cement compounds over time....
The moisture contents of several synthetic and natural goethite-bearing samples were determined by the loss-of-mass method Karl-Fischer titration. It was found that drying at 105°C did not remove all water from these samples, temperatures above 200°C would be required to completely adsorbed water. multiple peaks observed in TGA DSC measurements are due dehydroxylation goethite, but release decomposition goethite into hematite occurs with room temperature up onset main peak. a broad range...
The graft copolymer PMMA-g-PEG meets characteristics of their origin polymers: PMMA resistance and transparency appropriate structure, including good solubility in water organic solvents, lack toxicity, easy processing the PEG, with inserted between pharmacologically active polymers can act as drugs or may be used carriers for other drugs. PMMA-G-PEG derivatives are synthesized previously subsequently, passed through process emulsification incorporation drug fluconazole. Emulsified...