A5020380059- Lignin and Wood Chemistry
- Enzyme-mediated dye degradation
- Fermentation and Sensory Analysis
- Microbial Inactivation Methods
- Natural Fiber Reinforced Composites
- Meat and Animal Product Quality
- Polymer Foaming and Composites
- Catalysis for Biomass Conversion
- Curcumin's Biomedical Applications
- Advanced Cellulose Research Studies
- Innovative concrete reinforcement materials
- Microencapsulation and Drying Processes
- Electrochemical Analysis and Applications
- Biochemical and biochemical processes
- Mesoporous Materials and Catalysis
- Sensory Analysis and Statistical Methods
- Innovations in Concrete and Construction Materials
- Chemical Synthesis and Reactions
- Biochemical effects in animals
- Food Industry and Aquatic Biology
- Fiber-reinforced polymer composites
- Analytical Chemistry and Sensors
- Fungal Biology and Applications
- Wood Treatment and Properties
- Customer Service Quality and Loyalty
Universidade Federal do Rio de Janeiro
2015-2024
Imperial College London
2018
Rede de Química e Tecnologia
1997
Research involving lignin use is not new. For many years, the macromolecule was underestimated in its potential and burned for energy pulp paper industries. However, with advent of biorefinery on valorization lignocellulosic fractions, receiving greater motivation to be researched. Of applications, most profitable one conversion into carbon fiber. Lignin-based fibers can reduce manufacturing price this fiber values than 35%, besides using a renewable material highly sustainable appellation....
This work aims to evaluate the effect of alkali treatment on sisal fibers improve fiber properties and effectiveness their use as reinforcement in cement-based matrices. Alkaline solution concentration (1, 5 10 wt.% NaOH) post-treatment protocol (use distilled water or acetic acid) influence were evaluated. The physical, chemical, thermal, wettability surface characteristics analyzed. Also, single-fiber direct tensile pullout tests performed. Results showed an increase cellulose proportion...
The effects of thermosonication processing (TS, 90 °C, ultrasound powers 200, 400, and 600 W) on the quality parameters Jamun fruit dairy dessert compared to conventional heating (high-temperature short time, (HTST), °C/20 s) were evaluated. Microbiological inactivation stability, rheological parameters, physical properties, volatile fatty acid profiles, bioactive compounds assessed. TS provided more significant microbial (1 log CFU mL-1) higher stability during storage (21 days) than HTST,...
Abstract Hybrid organic–inorganic anatase (hybrid‐TiO 2 ) is prepared by a facile hydrothermal synthesis method employing citric acid. The synthetic approach results in high surface‐area nanocrystalline polymorph of TiO . uncalcined hybrid‐TiO directly studied as catalyst for the conversion glucose into 5‐hydroxymethylfurfural (HMF). In presence , HMF yields up to 45 % at conversions 75 were achieved water 130 °C monophasic batch reactor. As identified Ti K‐edge XANES, contains large...
The hydrogen bonding network analysis of softwood lignin is relevant to designing novel technologies overcome the recalcitrance plant biomass in industrial deconstruction and manufacturing lignin-based carbon fibers. In this work, we examine, by atomistic simulations, guaiacyl-rich guaiacyl-type over a wide range temperatures. We determine formation stable water-bridged dimeric complexes interaction phenolic aliphatic hydroxyl groups π–π stacking between phenol rings, causing slow dynamic...
Lignin is a tricky and complex structure. The growing interest in its use requires unanimous approach to nature; so, misconceptions that have already been overcome those perpetuated by who are not familiar with complexity do spread.
Os precursores mais empregados para obtenção da fibra de carbono são a poliacrilonitrila, o piche e rayon. Com aumento demanda materiais compósitos leves alta resistência, produção tem aumentado exponencialmente novos têm sido requisitados. A lignina, um material orgânico natural, estudada como possível candidata das fibras. Além ser rejeito industrial biorrefinarias, as fibras obtidas com lignina podem ter custo vantajoso quando comparado os demais comerciais. Em decorrência biodiversidade...
This work explored the chemical modification of lignin with succinic acid for first time. Temperature is crucial process, reducing reaction time and increasing conversion. In particular, at 160 °C five h 0.13 mol imidazole 0.35 acid, showed most significant reduction in glass transition temperature (from 183.3 to 118.5 °C) a decrease polydispersity index 11.31 8.96) yielded 0.73 mmol g–1 new groups. These results underscore critical role conditions modifying properties, potentially expanding...
The current work evaluates the production of ligninolytic enzyme optimization via response surface methodology using different inducers: acid cellulignin (CA); MnSO4 (Mn2+); CuSO4·5H2O (Cu2+); veratryl (3, 4-dimethoxybenzyl); alcohol (VA); Tween 80% (T80); and carbon-to-nitrogen ratio (C/N). A further goal was implementing a fed-batch strategy to produce extracts from P. sanguineus 2512 bubble column reactor (BCR). best optimized experimental condition in shake flasks 7.5 C/N ratio, 0.025...