The amount of plastic waste is growing every year and with that comes an environmental concern regarding this problem. Pyrolysis as a tertiary recycling process presented solution. can be thermal or catalytical performed under different experimental conditions. These conditions affect the type product obtained. With pyrolysis process, products obtained high added value, such fuel oils feedstock for new products. Zeolites used catalysts in catalytic influence final

In this study, polymeric nanocomposites based on poly(methyl methacrylate) (PMMA) and silicon carbide (SiC) nanoparticles were prepared by radical mass polymerization in the presence of filler. Nanoparticles SiC with without surface treatment organosilane obtained .The characterized X-ray fluorescence (XRF), infrared spectroscopy (FTIR), thermogravimetry (TGA) Field Emission Gun Scanning Electron Microscopy (FEG SEM) an energy dispersive x-ray (EDS) detector. The produced showed...

Most by-product wastes of the coffee industry are underutilized, including a fibrous husk that covers seeds, known as parchment. The present work aims to characterize parchment fiber and study influence alkaline treatment followed by steam explosion process assisted mechanical high shearing obtain microfibrillated cellulose. first step this was quantify, using three-steps methodology, lignocellulosic constituents in Cellulose, hemicellulose lignin were identified Fourier transform infrared...

Bone remodeling for spontaneous regeneration might be achieved by a combination of collagen and hydroxyapatite (HA). The aim the present study is to synthesize characterize hybrid composites HA carbonated (CHA) with different types collagen. For these composite synthesis, or CHA precursors were precipitated in solutions containing either hydrolyzed (HC) type II (COL). control, pure synthesized absence During HA-based materials addition HA, another calcium phosphate phase, brushite, was also...

A new technique based on the modified Hummer's method to synthesize reduced graphene oxide (rGO) with high purity, as well enhanced quality and low layer stacking is presented. It aims demystify traditional considerations made from X-ray diffraction by introducing comprehensive models determine number of stacked layers, understand respect limit physical phenomenon involved in technique. Poly (vinylidene fluoride) (PVDF) nanocomposites incorporated up 5.0 wt.% rGO were processed via extrusion...

Ultra-high molecular weight polyethylene (UHMWPE) is well known for its remarkable mechanical properties including excellent ballistic performance. These might be further improved by reinforcement fillers, especially nanoparticles (NPs). In the present work, UHMWPE incorporated with 0.01, 0.05 and 0.1 wt% of boron carbide (B4C) NPs twin-screw extrusion at 200 °C. nanocomposites are characterized high resolution transmission electron microscopy (HRTEM), scanning (SEM), X-ray diffraction...

Some treatment options available to repair bone defects are the use of autogenous and allogeneic grafts. The drawback first one is donor site’s limitation need for a second operation on same patient. In allograft method, problems associated with transmitted diseases high susceptibility rejection. As an alternative biological grafts, polymers can be used in repair. orthopedic field poly(methyl methacrylate), poly(ether-ether-ketone), ultra-high molecular weight polyethylene (UHMWPE). UHMWPE...

ABSTRACT The use of natural fibers (NFs) in polymer composites for structural applications has increased greatly the last years, owing to their abundance and biodegradability. In this work, an innovative simple successive alkali treatment been developed improve mechanical properties NFs/polypropylene (PP) composites. Three different cellulosic (curauá, jute, flax) were used, with a fixed proportion 10 wt %. immersed several times 5 % NaOH solution. Thermogravimetric analysis data showed...

Block copolymers with a low hydrophilic-to-lipophilic balance form membranes that are highly permeable to hydrophilic molecules. Polymersomes this type of membrane enable the controllable release molecules without rupture. However, these polymersomes difficult assemble because their hydrophobicity. Here, we report microfluidic approach production using double-emulsion drops ultrathin shells as templates. The small thickness middle oil phase enables attraction hydrophobic blocks polymers...

In the present work, synthetic route to obtain crosslinked polyethylene (PEX) was studied using vinyltrimethoxy silane (VTMS) as crosslink agent and commercial (HDPE LLDPE). Materials were processed with increasing amounts of VTMS (2.5, 5.0 7.5 wt.%). After insertion onto polymer chain in solid state, samples molded by compression. Gel content used measure extension crosslinking. Melting temperature degree crystallinity evaluated differential scanning calorimetry (DSC). The microstructure...

ABSTRACT The present work describes the preparation of polypropylene composites reinforced with cotton fibers, which were obtained from textile waste. cellulosic fibers bleached and then chemically modified on surface using acetylation or silanization methods. Fourier transform infrared spectroscopy analysis energy dispersive X‐ray confirmed efficiency both treatments. Results thermal degradation by thermogravimetric (TGA) treated indicated that acetylated ones decreased stability while...

In this work, jute fiber was used as a source of cellulose fiber.Chemical processes for the purification, mechanical dispersion in Ultra Turrax and modifications with titanium isopropoxide (TiP), 3aminopropyltrimethoxysilane (APTMS), well double modification both TiP APTMS, were to obtain fibers reduced diameter less agglomeration adhesion polar polymers such polyamides.Fibers close 10 μm observed by SEM after drying pulverization.The subjected alkaline treatment, acid hydrolysis doubly...

The automotive industry is under a growing volume of regulations regarding environmental impact and component recycling. Nowadays, glass fiber-based composites are commodities in the industry, but show limitations when recycled. Thus, attention being devoted to alternative reinforcements like natural fibers. Curauá (Curacao, Ananas erectifolius) reported literature as promising source fiber prone be used composite reinforcement. Nonetheless, one important challenge obtain properly dispersed...

Novel nanocomposites of polyamide-11 (PA11) reinforced with commercial graphene nanoplatelets (GNP) in amounts 1.0, 2.5, and 5.0 wt.% were prepared characterized for their thermal stability aging performance. The processing the was carried out by mixing PA11 molten state employing a double screw mini-extruder at 200 °C under 60 rpm speed, residence time 7 min. incorporation GNP increased PA11, particularly amount 1.0 wt.%, as observed thermogravimetric analysis. X-ray diffraction indicated...