Materiales avanzados

Materiales avanzados

Biomimetic Synthesis of Nor?Cedrene and Nor?Isozizaene Sesquiterpenoids and Exploration of Their Olfactive Properties
27/06/2022 - The chemical synthesis of isozizaene? and cedrene?type nor?sesquiterpenoids from a simple bio?inspired precursor nor?bisabolyl epoxide is described. This key intermediate undergoes selective...
A Comparative Study to Evaluate the Essential Work of Fracture to Measure the Fracture Toughness of Quasi-Brittle Material
27/06/2022 - In the present work, three different woven composite laminates were fabricated using the hand lay-up method. The woven reinforcement fibres were carbon fibres (CFRP), glass fibres (GFRP-W) and...
New Cytochalasin Derivatives from Deep?Sea Cold Seep?Derived Endozoic Fungus Curvularia verruculosa CS?129
21/06/2022 - Two new antimicrobial cytochalasin derivatives, 6 ? , 7 ? ?epoxydeoxaphomin C ( 1 ) and 12?hydroxydeoxaphomin C ( 2 ), a new natural occurring product 24?nor?cytochalasin B ( 3 ), together...
Investigation on DMA, Fatigue and Creep Behaviour of Rice Husk Ash Biosilica-Prickly Pear Short Fibre-Reinforced Epoxy Resin Composite
25/06/2022 - High toughness epoxy bio-composites are prepared using prickly pear short fiber and rice husk ash (RHA) biosilica particles for low cost and light weighted engineering applications. The prime...
Experimental Study on Repairing Corroded Cracks by Electrophoretic Deposition
23/06/2022 - The corrosion of reinforced concrete could reduce its mechanical properties and cause concrete cracking. Electrophoretic deposition is a new method for repairing rust-cracked reinforced concrete. In...
Graphene-polyaniline nanocomposite based coatings: Role of convertible forms of polyaniline to mitigate steel corrosion
- Present work addresses the synthesis of different structural forms of polyaniline (PANI) and their nanocomposites with graphene as functional fillers to epoxy coating for minimizing mild steel...
Selective oxidations using a cytochrome P450 enzyme variant driven with surrogate oxygen donors and light
16/06/2022 - Cytochrome P450 monooxygenase enzymes are versatile catalysts which have been adapted for multiple applications in chemical synthesis. Mutation of a highly conserved active site threonine to a...
Effects of a new compatibilizer on the mechanical properties of TPU/PEBA blends
- In this work, to improve the mechanical properties of thermoplastic polyurethane (TPU), polyether-block-amide elastomer (PEBA) was used to modify it through a blending method. Due to the low...
Contributions of atmospheric plasma treatment on a hygrothermal aged carbon/epoxy 3D woven composite material
01/08/2022 - In this paper, the effects of hygrothermal ageing and atmospheric plasma surface treatment on a 3D carbon/epoxy-amine woven composite material are studied. The goal is to study the surface...
Recent advances in flame retardant epoxy systems from reactive DOPO–based phosphorus additives
01/08/2022 - Epoxy resins are widely applied in industry for producing fire safe materials. Unfortunately, epoxy resins have the disadvantage of being highly flammable and thus require suitable modifications...
Functionalization of nitrogen-doped graphene quantum dot: A sustainable carbon-based catalyst for the production of cyclic carbonate from epoxide and CO2
01/04/2023 - A series of organic compounds were successfully immobilized on an N-doped graphene quantum dot (N-GQD) to prepare a multifunctional organocatalyst for coupling reaction between CO2 and propylene...
Research and Development of High-Performance High-Damping Rubber Materials for High-Damping Rubber Isolation Bearings: A Review
15/06/2022 - At present, high-damping rubber materials, widely used in the field of engineering seismic isolation, generally have the problems such as narrow effective damping temperature range, low damping loss...
Polymer composites: Additive manufacturing of composites
12/06/2022 - Novel methods in polymer engineering, especially Shape Memory Polymers (SMPs) have attracted major attention towards improvement of elastic properties under lower elastic strains. Special attention...
Fabrication of PTCA-PANI composites for electromagnetic wave absorption and corrosion protection
- The composites of 3,4,9,10-perylene tetracarboxylic acid doped polyaniline (PTCA-PANI) have been successfully fabricated by oxidative polymerization method in hydrochloric acid solution. FTIR, SEM...
Novel Expandable Epoxy Beads and Epoxy Particle Foam
14/06/2022 - Expanded polymeric beads offer the advantage of being able to produce parts with complex geometries through a consolidation process. However, established polymeric beads are made of thermoplastics,...
Micro-morphology highly uniform mesoporous Co3O4 spheres: shape-controlled fabrication by a salt-assisted template-free method and enhanced catalytic performance of styrene epoxidation
11/06/2022 - Abstract In this work, the highly uniform microscale mesoporous cobalt oxide (Co3O4) spheres were successfully prepared via a facile salt-assisted template-free hydrothermal...
Facile Construction of Polypyrrole Microencapsulated Melamine-Coated Ammonium Polyphosphate to Simultaneously Reduce Flammability and Smoke Release of Epoxy Resin
12/06/2022 - A unique mono-component intumescent flame retardant, named PPy-MAPP, of which melamine-coated ammonium polyphosphate (MAPP) was microencapsulated by polypyrrole (PPy), was synthesized and carefully...
Highly conjugated isoindigo and quinoxaline dyes as sunlight photosensitizers for onium salt?photoinitiated cationic polymerization of epoxy resins
11/06/2022 - Photoinitiated cationic polymerization of epoxy resins via charge transfer complexes (CTCs) formed between four new chromophoric dyes is reported. CTC formation was proved by optical and...
Suitability assessment of raw?alkalized Ziziphus nummularia bark fibers and its polymeric composites for lightweight applications
09/06/2022 - The global trend of environmental protection has led to replacing synthetic fibers in every feasible application with natural fibers. An alteration of the fiber's surface is essential for the natural...
Interlaminar improvement of carbon fiber/epoxy composites via fluorine?containing high?epoxy?value sizing agent
06/06/2022 - AbstractDegradation pathways of Irganox 1010 in aged plastic bonded explosive (PBX) 9501 were investigated using ultrahigh performance liquid chromatography coupled to quadrupole time of flight mass...
Effect of UV irradiation on epoxy adhesives and adhesively bonded joints reinforced with BN and B4C nanoparticles
01/08/2022 - The effect of environmental conditions on epoxy polymers restricts their usage in outdoor applications. Although many studies of epoxy adhesive and adhesively bonded joints under different...