This work investigates the effect of eco-friendly chemical treatments on mechanical and physical properties composite laminates based sisal fibres. A 2231 full-factorial design is conducted to test influence solution types, fibre treatment time, polymer matrix type morphological characterisation composites. Chemical remove impurities from surfaces, enhance fibre-matrix adhesion. The treatments, especially with sodium carbonate (Na2CO3), also progressively reduce hemicellulose content....

The use of recycled and renewable components in structural applications supports the development sustainable lightweight structures. Disposed bottle caps can be used to generate eco-friendly honeycomb cores, especially when combined with other components. A natural fibre-based laminate represents an alternative synthetic fibres, matrices, metals skins for sandwich panels. This study evaluates flax fibre laminates as panels made from upcycled core. Metallic skin cases are also tested a...

A low-velocity impact characterisation of a sustainable sandwich panel based on upcycled bottle caps as circular honeycomb is conducted. The recycled core aims to develop an alternative route reusing waste disposed in landfills. Ecological alternatives skin (recycled PET foil) and adhesive (bio-polyurethane) are also compared with classic components (aluminium epoxy polymer). low-cost reinforcement (cement particles) proposed enhance the mechanical strength panel. samples tested at several...

Brazilian tropical woods are widely used in civil construction industry as structural items, building components and furniture.Wood physical mechanical properties significantly influenced by the moisture content level, which is mostly affected wood origin stocking conditions.The development of an analytical equation to estimate apparent density (ρ MC ) based on four fundamental parameters, such level (MC), fibre saturation point (FSP), basic b -ratio between dry mass saturated volume), 0 was...

A sandwich structure made of sustainable components is investigated under quasi-static and dynamic conditions. The upcycled plastic bottle caps are used to manufacture a greener circular cell honeycomb core, based on full factorial design. recycled PET foil as skins, being compared classic panel with aluminium skins. particle-reinforced adhesive also tested by adding rubber particles, from remoulded tyres, cement particles. Three-point bending test low-velocity drop-tower performed...

A structure's sustainability depends not only on its components, but also the manufacturing process. The adhesive layer mostly increases structural weight, reducing weight-specific properties, besides hindering disassembly and sorting at end-of-life. This study investigates an alternative joining method based ultrasonic welding for upcycled honeycomb core sandwich panels. Thermoplastic composite skins, reinforced with flax or glass fibres, are connected to polyethylene made from disposed...

Abstract This work describes aluminium skin sandwich panels made of recycled polyethylene (PE) bottle caps as a sustainable honeycomb core. A full factorial design is carried out to identify the effects orientation (single and alternated caps), roughness (smooth rough substrate) type adhesive (epoxy or polyester polymer) on mechanical properties panels. Numerical analysis performed better assess failure mechanisms involved. Sandwich with epoxy adhesive, smooth single oriented obtain greater...

This work describes a novel hybrid polymer composite made from sugarcane bagasse and discarded rubber particles. A 2 5 full factorial design is performed to identify the effects of fibres particles on physical mechanical properties composites. The are evaluated by tensile compression tests, apparent porosity, water absorption bulk density. substantially affected amount size length treatment affect stiffness strength composites with less contribution. presence increases compressive toughness

Abstract The extensive disposal of plastic components into the environment requires an economically and ecologically feasible solution for proper treatment or new uses waste. This study compares environmental mechanical performance a sandwich panel based on disposed bottle caps core with different eco‐friendly skins adhesive. A cradle‐to‐gate life cycle assessment impacts manufacture six‐bottle cap designs various skin (aluminum, recycled PET, flax laminates) adhesive types (epoxy vs....

O sódio é um nutriente essencial necessário pelo corpo para manter os níveis de fluido e proporcionar canais sinalização nervosas. Entretanto, seu consumo excessivo está associado ao desenvolvimento da hipertensão arterial, doenças cardiovasculares, obesidade outras doenças, que estão entre as primeiras causas internações óbitos no Brasil mundo. objetivo deste projeto analisar o conteúdo dos produtos alimentos industrializados salgadinhos embutidos. Bancos dados comerciais foram usados...

This work investigates epoxy composites reinforced by randomly oriented, short glass fibres and silica microparticles. A full-factorial experiment evaluates the effects of fibre mass fraction (15 20 wt%) length (5 10 mm), microparticles on apparent density porosity, as well compressive tensile strength modulus hybrid composites. Hybrid present significantly higher (9%) (57%), (up to 15%) relative pure epoxy.

This work investigates the reuse of natural (SCB) and aminopropyltriethoxysilane-modified (MSCB) sugarcane bagasse fibres in cementitious composites. Sugarcane are pre-used treatment motor oil contaminated effluents. A full factorial design is used to identify effects fibre type (SCB MSCB), length (0.6 1.2 mm), amount (1 2 wt%) condition (before after filtration) on apparent density, water absorption, porosity, ultra-pulse velocity, dynamic modulus, flexural strength modulus. SCB lead...