Abstract Biodegradable blends of amorphous poly(lactic acid) (aPLA) and polycaprolactone (PCL) nanocomposites these were developed by melt blending. A morphological study the bioblends was carried out means WAXS SEM showing immiscible behavior. The also characterized morphologically WAXS, TEM SEM, revealing high degree interaction nanoclays with aPLA. Mechanical, thermal gas barrier properties different studied effect blending clay addition on above‐mentioned evaluated.

This paper gathers a number of significant results where nanotechnology was satisfactorily applied to improve packaged food quality and safety by increasing the barrier properties oxygen an ethylene-vinyl alcohol copolymer (EVOH) in dry under humid conditions poly(lactic acid) (PLA) biopolymer. The nanodispersion polymer matrix modified monolayers clays included positive lists for food-contact applications is adequate methodology increase shelf-life. In spite fact that, principle, there no...

Thermal energy storage (TES) is extremely important in concentrated solar power (CSP) plants since it represents the main difference and advantage of CSP with respect to other renewable sources such as wind, photovoltaic, etc. a low-carbon emission source energy, TES allows have availability dispatchability using available industrial technologies. Molten salts are used material because their high operational temperature stability up 500°C. Their drawbacks relative poor thermal properties...

In this research, different contents of eugenol in the 2.5-25 wt.% range were first incorporated into ultrathin fibers poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) by electrospinning and then subjected to annealing obtain antimicrobial monolayers. The most optimal concentration PHBV monolayer was 15 since it showed high electrospinnability thermal stability also yielded highest bacterial reduction against Staphylococcus aureus (S. aureus) Escherichia coli (E. coli). This...

ABSTRACT Poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) was blended with poly(lactic acid) (PLA) various reactive processing agents to decrease its brittleness and enhance processability. Three diisocyanates, namely, hexamethylene diisocyanate, poly(hexamethylene diisocyanate), 1,4‐phenylene were used as compatibilizing agents. The morphology, thermomechanical properties, rheological behavior investigated scanning electron microscopy, thermogravimetric analysis, differential...

The main goal of this study was to develop poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films with long-term antimicrobial capacity interest in food packaging applications. To end, eugenol first highly efficiently encapsulated at 50 wt.-% the pores mesoporous silica nanoparticles by vapor adsorption. eugenol-containing were then loaded 2.5–20 range into PHBV electrospinning and resultant electrospun composite fibers annealed 155 °C produce continuous films. characterization showed...

ABSTRACT Active biodegradable poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV) melt mixed nanocomposites and bilayer structures containing copper oxide (CuO) nanoparticles were developed characterized. The consisted of a bottom layer compression molded PHBV3 (3% mol valerate) coated with an active electrospun fibers mat made CuO PHBV18 (18% derived from microbial cultures cheese whey. results showed that the water vapor permeability increased addition while oxygen barrier properties...

The present study evaluated the effect of using electrospun polycaprolactone (PCL) as a barrier coating and black pepper oleoresin (OR) natural extract on morphology, thermal, mechanical, antimicrobial, oxygen, water vapor properties solvent cast gelatin (GEL). antimicrobial activity developed multilayer system obtained by so-called electrospinning technique was also against Staphylococcus aureus strains for 10 days. results showed that containing PCL OR increased thermal resistance,...

Service-Learning (SL) experiences enable University Social Responsibility (USR) to be worked on in engineering studies as a core of education for Sustainability. The combined use such with active student-centered teaching methodologies fosters the acquisition general and specific competences. On basis students’ perception, this study investigated sought evidence empirical foundations understand whether how Project Based Learning (PBL) affects USR-related competences when SL experience was...

In the present study, circular economy based and potentially low-cost poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was produced by mixed microbial cultures derived from fruit pulp, an industrial by-product of juice industry. Three different chemical routes, namely non extraction, extraction with sodium hypochlorite (NaClO), chloroform, in combination filtering centrifugation, were explored to purify biopolymer find most optimal solution for its processing via electrospinning. The...

Electro-hydrodynamic processing, comprising electrospraying and electrospinning techniques, has emerged as a versatile technology to produce nanostructured fiber-based particle-based materials. In this work, an antimicrobial active multilayer system commercial polyhydroxyalkanoate substrate (PHA) electrospun PHA coating containing in situ-stabilized silver nanoparticles (AgNPs) was successfully developed characterized terms of morphology, thermal, mechanical, barrier properties. The obtained...

In this study, novel active films made of poly(ε-caprolactone) (PCL) containing a solid dispersion sage extract (SE) were developed by means the electrospinning technique and subsequent annealing treatment. Initially, antioxidant antimicrobial potential SE was confirmed. Thereafter, effect incorporation at different loading contents (5%, 10%, 20%) on physicochemical functional properties evaluated. The characterized in terms morphology, transparency, water contact angle, thermal stability,...

Novel green composites based on commercial poly(3-hydroxybutyrate) (PHB) filled with 10 wt % rice husk flour (RHF) were melt-compounded in a mini-mixer unit using triglycidyl isocyanurate (TGIC) as compatibilizer and dicumyl peroxide (DCP) initiator. Purified poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) produced by mixed bacterial cultures derived from fruit pulp waste was then incorporated into the composite contents 5–50 range. Films for testing obtained thereafter...

Poly(3-hydroxybutyrate-co-3-valerate) (PHBV), being one of the most studied and commercially available polyhydroxyalkanoates (PHAs), presents an intrinsic brittleness narrow processing window that currently hinders its use in several plastic applications. The aim this study was to develop a biodegradable PHA-based blend by combining PHBV with poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), another copolyester PHA family shows more ductile behavior. Blends 20% wt., 30% 40% wt. PHBH were...

Abstract Plastic pollution in the form of microplastics (MPs), poses a significant threat to natural ecosystems, with detrimental ecological, social, and economic impacts. This review paper aims provide an overview existing research on interaction between microbial biofilms MPs environments. The begins by outlining sources types MPs, emphasizing their widespread presence marine, freshwater, terrestrial ecosystems. It then discusses formation characteristics surfaces, highlighting role...

Four different end-of-life options for disposable bioplastic cups were investigated and compared based on their environmental implications. Two products with distinct polymeric composition tested simulating the following scenarios at laboratory scale: i) industrial composting (180 days 58 °C); ii) anaerobic digestion followed by (45 55 °C 180 iii) direct digestate use soil agricultural purposes 25 iv) uncontrolled release into a environment °C). Ecotoxicity tests run end of each experiment...

Polyhydroxyalkanoates (PHAs) are one of the most researched family biodegradable polymers based on renewable materials due to their thermoplastic nature and moisture resistance. The present study was targeted investigate preparation characterization poly(3-hydroxybutyrate) (PHB) films obtained through electrospinning technique. To convert them into continuous then increase application interest in packaging, electrospun fiber mats were subsequently post-processed by different physical...