A5009069281- biodegradable polymer synthesis and properties
- Advanced Cellulose Research Studies
- Electrospun Nanofibers in Biomedical Applications
- Polymer Nanocomposites and Properties
- Natural Fiber Reinforced Composites
- Microplastics and Plastic Pollution
- Polymer crystallization and properties
- Nanocomposite Films for Food Packaging
- Recycling and Waste Management Techniques
- Polymer composites and self-healing
- Silicone and Siloxane Chemistry
- Dielectric materials and actuators
- Polymer Science and Applications
- Bone Tissue Engineering Materials
- Epoxy Resin Curing Processes
- Advanced Sensor and Energy Harvesting Materials
- Electromagnetic wave absorption materials
- Conducting polymers and applications
- Tribology and Wear Analysis
- Carbon dioxide utilization in catalysis
- TiO2 Photocatalysis and Solar Cells
- Shape Memory Alloy Transformations
- Polymer Foaming and Composites
- Polymer Nanocomposite Synthesis and Irradiation
- Advanced Photocatalysis Techniques
National Institute for Research and Development in Environmental Protection
2014-2024
Institutul Naţional de Cercetare Dezvoltare pentru Chimie si Petrochimie
2017-2024
National Institute for Research and Development in Informatics - ICI Bucharest
2017-2024
Institute for Research and Development
2015
University of Oradea
2011
Biodegradable blends and nanocomposites were produced from polylactic acid (PLA), poly(3-hydroxybutyrate) (PHB) cellulose nanocrystals (NC) by a single step reactive blending process using dicumyl peroxide (DCP) as cross-linking agent. With the aim of gaining more insight into impact processing methods upon morphological, thermal mechanical properties these nanocomposites, three different techniques employed: compression molding, extrusion, 3D printing. The addition DCP improved interfacial...
In this work, a new eco-friendly method for the treatment of poly(3-hydroxybutyrate) (PHB) as candidate food packaging applications is proposed. Poly(3-hydroxybutyrate) was modified by bacterial cellulose nanofibers (BC) using melt compounding technique and plasma or zinc oxide (ZnO) nanoparticle coating better properties antibacterial activity. Plasma preserved thermal stability, crystallinity melting behavior PHB‒BC nanocomposites, regardless amount BC nanofibers. However, remarkable...
Hybrid nanomaterials based on zinc oxide were synthesized via the sol-gel method, using different silane coupling agents: (3-glycidyloxypropyl)trimethoxysilane (GPTMS), phenyltriethoxysilane (PhTES), octyltriethoxysilane (OTES), and octadecyltriethoxysilane (ODTES). Morphological properties precursor type effect particle size investigated dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM), transmission (TEM), thermogravimetric analysis (TGA), X-ray diffraction...
The control of the fiber length is proposed as a low cost and eco-friendly alternative to expensive chemical treatments fibers in polymer composites. Different initial lengths hemp (HF), ranging from 1 4 mm, were obtained using automatic milling manual cutting. effect HF on properties composites was studied complex system consisting polypropylene (PP)/poly[styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS)/HF composite. A reduction average about 2, 2.5 or times, depending length, observed...
A cost-effective solution to the problems that automotive industry is facing nowadays regarding regulations on emissions and fuel efficiency achieve weight reduction of automobile parts. Glass fiber-reinforced polymers are regularly used manufacture various components, some parts may also contain thermoplastic elastomers for toughness improvement. This work aimed investigate effect styrene-(ethylene-co-butylene)-styrene triblock copolymer (E) treated fly ash (C) morphological, thermal,...
Nosocomial infections represent a major threat within healthcare systems worldwide, underscoring the critical need for materials with antimicrobial properties. This study presents development of polyurethane foam embedded silver nanoparticles (PUF/AgNPs) using rapid, eco-friendly, in situ radiochemical synthesis method. The nanocomposites were characterized by UV–vis and FTIR spectroscopy, scanning electron microscopy coupled energy dispersive X-ray technique (SEM/EDX), differential...
Present study refers to the synthesis of new advanced materials based on poly(methacrylic acid) (PMAA) with previously reported own modified clays by edge covalent bonding. This will create premises obtain nanocomposite hydrogels combined hydrophilic-hydrophobic behavior absolutely necessary for co-delivery polar/nonpolar substances. For synthesis, N,N’-methylenebisacrylamide was used as cross-linker and ammonium persulphate initiator. As a consequence inclusion clay into polymer matrix...
The objective of this study was to investigate the effects enzymatic hydrolysis using α-amylase from Bacillus amyloliquefaciens on mechanical properties starch-based films. process parameters and degree (DH) were optimized a Box-Behnken design (BBD) response surface methodology (RSM). resulting hydrolyzed corn starch films (tensile strain at break, tensile stress Young's modulus) evaluated. results showed that optimum DH for achieve improved film-forming solutions achieved water ratio 1:2.8,...
Epoxy resin was conjugated with halloysite nanotubes (HNT) and different types of ZnO nanoparticles (commercial modified ZnO-ODTES) to obtain HNT-ZnO/epoxy composites. These (ZnO NPs) were utilized the intention enhance interfacial bonding between epoxy reinforcing agent (HNT). The properties resulted composites characterized by various methods such as FTIR-ATR, TGA, DSC, TEM-EDX, Nanoindentation analyses. thermal enhanced a greater extent addition HNT-ZnO nanofillers. DSC testing proved...
A series of poly(butylene sebacate) (PBSe) aliphatic polyesters were successfully synthesized by the melt polycondensation sebacic acid (Se) and 1,4-butanediol (BDO), two monomers manufactured on an industrial scale from biomass. The number average molecular weight (Mn) in range 6116 to 10,779 g/mol glass transition temperature (Tg) PBSe tuned adjusting feed ratio between monomers. Polylactic (PLA)/PBSe blends with concentrations 2.5 20 wt% obtained compounding. For first time, PBSe’s effect...
This paper describes the preparation of new PEG6000–silica-MWCNTs composites as shape-stabilized phase change materials (ssPCMs) for application in latent heat storage. An innovative method was employed to obtain organic–inorganic hybrid materials, which both a part PEG chains, used material, and hydroxyl functionalized multiwall carbon nanotubes (MWCNTs-OH), thermo-conductive fillers, were covalently connected by newly formed urethane bonds in-situ-generated silica matrix. The study’s main...
Microcrystalline cellulose (MCC) was surface modified by two approaches, namely a plasma treatment in liquid using Y-shaped tube for oxygen flow (MCC-P) and TEMPO mediated oxidation (MCC-T). Both treatments led to the functionalization of as illustrated FTIR XPS results. However, had much stronger oxidizing effect, leading decrease thermal stability MCC 80 °C. Plasma celluloses were incorporated poly(3-hydroxybutyrate) (PHB) matrix they influenced morphology, thermal, mechanical properties...
There is an ever-growing interest in recovering and recycling waste materials due to their hazardous nature the environment human health. Recently, especially since beginning of COVID-19 pandemic, disposable medical face masks have been a major source pollution, hence rise studies being conducted on how recover recycle this waste. At same time, fly ash, aluminosilicate waste, repurposed various studies. The general approach these process transform them into novel composites with potential...
Poly (3-hydroxybutyrate) (PHB) is a valuable biopolymer that produced in industrial quantity but not widely used applications due to some drawbacks. The addition of cellulose nanofibers (CNF) as biofiller PHB/CNF nanocomposites may improve PHB properties and enlarge its application field. In this work, n-octyltriethoxy silane (OTES), medium-chain-length alkyl silane, was surface chemically modify the CNF (CNF_OTES) enhance their hydrophobicity compatibility with PHB. functionalization...