Chitosan/bacterial cellulose composite films containing diamond nanoparticles (NDs) with potential application as wound dressing are introduced. Microstructural studies show that NDs uniformly dispersed in the matrix, although slight agglomeration at concentrations above 2 wt % is seen. Fourier transform infrared spectroscopy reveals formation of hydrogen bonds between and polymer matrix. X-ray diffraction analysis indicates reduced crystallinity matrix presence NDs. Approximately 3.5-fold...

Evaporative cooling (EC) is an interesting alternative for reducing energy consumption and CO2 emission associated with the of building. In present work, a prototype innovative dew-point indirect evaporative cooler (DIEC) was manufactured by additive manufacturing technology. This made up two types materials: (a) one porous, high water absorption capacity, polyvinyl alcohol (PVA) felt, therefore, capacity generate EC; (b) another hydrophobic properties, polylactic acid (PLA) bronze. The...

This work reports on the design and development of nanocomposites based a polymeric matrix containing biodegradable Polylactic Acid (PLA) Polyhydroxyalkanoate (PHA) coated with either Graphite NanoPlatelets (GNP) or silver nanoparticles (AgNP). Nanocomposites were obtained by mechanical mixing under mild conditions low load contents (<0.10 wt %). favours physical adhesion additives onto polymer surface, while bulk remains unaffected. Nanocomposite characterisation was performed via optical...

The world population is growing by 1 billion people every 10 years. There will come a time when there be more to feed but less land grow food. Greenhouses can the solution this problem because they provide highest production yield per m2 and also use water, food safety, offer high quality. Photosynthetic active radiation (PAR) favors vegetable growth with specific blue red light ratio. Thus, increasing amount of improves chlorophyll absorption photosynthetic efficiency. In article, we...

Abstract Olive tree pruning (OTP) is one of the most abundant sources biomass waste in Mediterranean basin. This especially relevant southern Spain where olive oil production represents a large part economy. prunings are mostly either burned or spread orchards as an organic amendment, used for heat generation on domestic scale. However, lignocellulosic composition OTP makes it potential source biopolymers, thus providing excellent economic alternative sector. In this work, pretreated fibers...

The present work studies the use of olive pit (OP) as a reinforcement in manufacture composites based on post-consumer recycled polypropylene (rPP). In this way, it is feasible to provide added value from pits, by-product resulting industry operations, while promoting circular economy and reducing fossil-based polymers. For purpose, suitable samples were manufactured using 25 wt% 40 OP. Additionally, effect incorporating additives was studied: (a) process control additive (PA), (b) coupling...

Polyamide66 (PA66) and polyamide66/sepiolite (PA66/sepiolite) nanocomposites at 1, 3, 5, 7, 9 wt% clay loading were prepared injected to simulate industrial processing. Tensile tests performed in the samples, scanning electron microscopy was used characterize fracture surface. The samples also examined by X‐ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), vibrational spectroscopy analysis (FT‐IR FT‐Raman). Higher tensile strength stiffness reduction of strain failure are...

Polylactic acid (PLA) is a biomaterial widely used as an alternative to petroleum-based polymeric matrices in plastic components. PLA-based biocomposites reinforced with lignocellulosic waste are currently receiving special attention owing their mechanical properties, low toxicity, recyclability, and biodegradability. The influence of the percentage on properties resistance degradation some points great relevance. Therefore, series containing different percentages olive pits (5, 15, 25 40%...

The objective of this work is to improve the mechanical properties polylactic acid (PLA) by incorporating cellulose nanocrystals (CNC) previously obtained from a pulp extracted olive tree pruning (OTP) waste. Composites were manufactured melt processing and injection moulding evaluate effect introduction CNC with conventional manufacturing methods. This OTP-cellulose was subjected further purification process bleaching, thus bringing content up 86.1%wt. highly purified hydrolysed sulfuric...

Abstract This work reports on the design and preparation of composites based a high impact acrylonitrile‐butadiene‐styrene polymer matrix filled either with aluminium microparticles or graphite nanoplatelets. A surfactant tin were further added to improve dispersion adhesion fillers in an attempt conductivity materials. The obtained via twin‐screw extrusion their performance fused filament fabrication was successfully tested compared other conventional ways manufacturing plastic parts....

A two-step chemical process was carried out on olive pruning residues according to an optimised sequence that led the isolation of natural fibre with a high cellulose content. Reaction time, temperature and HNO 3 concentration in acid hydrolysis stage were by means Response Surface Methodology achieve highest removal hemicellulose lignin crystallinity index, minimising hydrolysis. Subsequent NaOH allowed obtain pulp enriched (83.28 wt.%). Analysis revealed isolated had index (70.06%) thermal...

ABSTRACT Influence of sepiolite nanoclay on the properties resulting join between poly(lactic acid) (PLA) and different Polyamide66 (PA66)/nanoclay nanocomposites was studied in this work. Six polymer based PA66 were manufactured through a melt compounding process by adding fixed 1.64 wt % commercial IR absorber additive respective weight percentages to matrix. Several nanocomposite/PLA joints finally performed means transmission laser welding technology weldings characterized terms...

In this study, the integration of paper industry waste with high cellulose content into biocomposites polylactic acid (PLA), a widely used biobased polymer material, was investigated. The PLA/waste biocomposite samples (0–25 wt.%) were manufactured using extrusion and injection moulding techniques. mechanical test results showed improvements in terms tensile properties decrease impact strength as percentage residue increased. melting temperature decreased, crystallinity increased all...

Stereolithography is an additive manufacturing technology commonly used to build either prototypes or final parts. Nevertheless, the manufacture of structural parts has been ruled out owing poor mechanical properties conventional UV-curable resins. Moreover, inventory available commercial resins still limited and they exhibit low thermal electrical conductivity values. In this work, some composite materials were designed using Al microparticles dispersed within SLA resin matrix. These...

Globally, huge amounts of cotton and sunflower stalks are generated annually. These wastes being underutilized since they mostly burned in the fields. So, this work, we proposed a three-step method consisting acid pre-treatment, alkaline hydrolysis, bleaching for extraction cellulose pulps. pulps were characterized to assess their morpho-structural thermal properties. The design experiments response surface methodology used optimization pre-treatment order achieve maximum removal...

El objetivo principal de este trabajo fue evaluar el potencial enfriamiento evaporativo un canal aire fabricado con materiales foam mediante técnicas fabricación aditiva. Este canal, tiene mismo comportamiento energético que módulo directo (DEC) o los canales húmedos indirecto (IEC). filamento compuesto por ácido poliláctico (PLA) y agente químico soplado, cual permite generar porosidad. La técnica aditiva usada Fabricación Filamento Fundido (FFF). Diversos ensayos experimentales...

Los sistemas de enfriamiento evaporativo indirecto presentan una alternativa prometedora a los métodos convencionales basados en compresión vapor. Este estudio se centró el diseño y la fabricación un sistema punto rocío utilizando resina cerámica técnica aditiva DLP (Digital Light Processing). A diferencia diseños tradicionales con canales rectangulares, este emplea tubular. Se realizaron pruebas experimentales condiciones laboratorio, variando temperatura del aire entrada 30 °C 45 caudal 12...

In recent years, new business models have emerged based on the principles of circular economy, which promote different actions such as: (a) optimization available resources, (b) reduction in consumption raw materials nonrenewable origin, and (c) use waste for manufacture more environmentally friendly products. comparison with linear production models, goods produced are discarded at end their useful life, these propose to keep resources economic system much longer achieve greater...