D. S. Rosa

Federal University of ABC | UFABC · Department of Materials Engineering

Globally, millions of tons of waste cooking oils (WCO) are generated yearly, and the recovery rate for manufacturing chemicals such as biodiesel is still low. Unfortunately, part of the WCO has been directly discharged into natural environments, underscoring the industrial significance of developing novel technologies for its utilization. As a poss...

Manufacturing three‐dimensional scaffolds with significant rough and porous structures is advantageous in tissue regeneration approaches influencing cell growth. Thus, this work aims to study the effect of using different Pullulan contents (PULL) in the poly(lactic) acid (PLA) matrix for 3D printing scaffolds. PLA composites filler with PULL (5 and...

This study investigates the incorporation of zinc oxide (ZnO) and ketoprofen (keto) into poly(lactic acid) (PLA) filaments to enhance their biocompatible. PLA is widely used in additive manufacturing, especially in biomedical applications, due to its biodegradability and biocompatibility. However, its interaction with biological tissues can be impr...

This work prepared a class of starch hydrogel with and without lignin from sugarcane bagasse (5% wt.) and trisodium citrate as a crosslinking agent. The physical and chemical properties of the hydrogels were characterized by Fourier-transformed infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Thermogravimetric analysis (TGA), and X...

Globally, millions of tons of waste cooking oils (WCO) are generated yearly, and the recovery rate for manufacturing chemicals such as biodiesel is still low. Unfortunately, part of the WCO has been directly discharged into natural environments, underscoring the industrial significance of developing novel technologies for its utilization. As a poss...

This study investigates the incorporation of zinc oxide (ZnO) and ketoprofen (keto) into poly(lactic acid) (PLA) filaments to enhance their biocompatible. PLA is widely used in additive manufacturing, especially in biomedical applications, due to its biodegradability and biocompatibility. However, its interaction with biological tissues can be impr...

Aquatic environments have experienced profound and severe consequences in recent years due to oil spills and chemical leaks in oceanic and river ecosystems. Because of this, several studies have been conducted to develop sustainable adsorbents with hydrophobic characteristics. Thus, the present research focuses on the development of eco-friendly so...

This work developed composite and hybrid membranes of poly(butylene adipate-co-terephthalate) (PBAT) with nanocurcumin (NC) and/or cloisite 20A (C20A). The dispersed phases were characterized by DLS, ζ potential, XRD, SEM, and FTIR, while XRD, SEM, FTIR, mechanical properties, contact angle, and copper sorption evaluated the composite membranes. DL...

Anthropogenic activities can lead to high contents of potentially toxic elements (PTEs) in soil and water. Thus, there is a worldwide need to find effective, environmentally friendly sorbents for remediating sites polluted with metals. In this study, we investigated how pectin/magnetite/pine sawdust (PE/Fe 3 O 4 /P) membranes serve as sorbents for...

Activated carbon (AC) produced from agro-industrial waste is an interesting adsorbent in water purification and effluent treatment processes. In this work, activated biochar (BFAC) from banana peel waste (BPF) was prepared by chemical activation (NaOH) followed by pyrolysis at 600 °C to remove methylene blue (MB) from wastewater. BFAC was character...

Potentially toxic metal ions, such as hexavalent chromium (Cr6+), present in water concern the population's health due to their persistence, bioaccumulation potential, and high toxicity. Highly porous materials based on polysaccharides are promising technologies for metal removal due to their high surface area, biodegradability, and low toxicity. T...

Chitosan, obtained from chitin in crustacean exoskeletons, has attracted interest due to its biocompatibility and versatility of application in several industries. Chemical methods are traditional for chitosan production but present environmental challenges. This study comprehensively assesses the microwave-assisted method as a greener alternative...

Infection control is a growing problem in places where hygiene is required particularly in hospitals. Most of the clothing and garments used to protect cross infections from patient to patient and patient to medical personnel possess barrier properties that resist not only the entry of blood and liquids but also microorganisms. The present study de...

Poly(vinyl chloride) is a thermoplastic material quite versatile and with wide application in society. Still, the application possibilities can be expanded through composite material with PVC as a matrix associated with biopolymers. These developments allow for improving chemical, thermal and mechanical properties and contributing to more environme...

Heavy metals deserve particular attention as they can cause serious health problems in living beings, such as genetic and physiologic diseases, even at low concentrations. Naturally, the need for techniques and processes to remove heavy metals from water emerges. Among those techniques, adsorption stands out because it is easy to implement, environ...

The method employed for membrane preparation and nanoparticle incorporation in membrane systems can affect their properties. This work aims to compare the better strategy to obtain membranes from the preparation of PBAT [Poly(butylene adipate co‐terephthalate)] containing nanoclay Cloisite® 20A (C20A) (0, 0.5, and 1 wt.%) by combined Evaporation/No...

Additive manufacturing (AM) of eco‐friendly biocomposites has been growing recently to obtain green fillers capable of reducing bioplastic costs without compromising the material processability and performance. This paper aims to study the effect of using different Agave America fiber volume ratios on the morphological, chemical, and thermal proper...

In this study, blends at different concentrations of poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) were developed using poly(styrene-co-maleic anhydride) (AG) as a compatibilizer to improve the toughness without losing biodegradability. The blends were prepared by an extrusion process followed by injection to evaluate t...

Due to the multiple industrial applications of chromium compounds and their dangerous nature for the environment, the development of adsorbent materials has been investigated. In line with this reality, bacterial cellulose (BC) has become a potential filler in the polymeric matrix due to its ability to remove toxic metals; however, its performance...

We review the recent progress that have led to the development of porous materials based on cellulose nanostructures found in plants and other resources. In light of the properties that emerge from the chemistry, shape and structural control, we discuss some of the most promising uses of a plant-based material, nanocellulose, in regenerative medici...

Cancer is a major health burden in Sri Lanka. 29,604 new cases and 16,691 cancer deaths were recorded in 2021. Further, 81 new cases and 45 deaths were recorded daily. Trend will increase 23% every year till 2030. Sri Lanka imports 18F fluorodeoxyglucose(FDG) for PET/CT scanning of cancer patients from India. A dose of 3400 mCi (cost 3000 USD) purc...

Melaleuca alternifolia essential oil (MaEO) is a green antimicrobial agent suitable for confection eco-friendly disinfectants to substitute conventional chemical disinfectants commonly formulated with toxic substances that cause dangerous environmental impacts. In this contribution, MaEO-in-water Pickering emulsions were successfully stabilized wit...

The use of lignocellulosic fibers as fillers in polymer matrices has aroused the interest of the scientific community and industrial sectors. In Brazil, the high macadamia consumption has generated a significant amount of residues that are incorrectly discharged. Thus, the revalorization of macadamia residues (MR) as filler in castor oil-based poly...

The preparation of nanosilica from rice husk without using any concentrated mineral acids is a novel concept. This work proposes a bioleaching strategy to remove metallic impurities from rice husk for the preparation of nanosilica. Herein, nanosilica (BJRHS) was prepared by calcinating Averrhoa bilimbi juice pre-treated rice husks in a muffle furna...

Unlabelled: Chitosan is a cationic polysaccharide with intrinsic antimicrobial properties that can be used as an ecological alternative to develop functional materials to inhibit the proliferation of microorganisms. This work evaluates chitosan nanocapsules (CNs) as a self-disinfecting agent to provide bactericidal activity on cotton fabrics (CF),...

Bioinspired bactericidal surfaces are artificial surfaces that mimic the nanotopography of insect wings and are capable of inhibiting microbial growth by a physicomechanical mechanism. The scientific community has considered them an alternative method to design polymers with surfaces that inhibit bacterial biofilm formation, suitable for self-disin...

The pandemic scenario has impacted the consumption pattern, increasing the use of single-use materials. This work presents the development of active films for application in food packaging products. Poly(butylene adipate-co-butylene terephthalate) (PBAT) films, reinforced with nanocellulose (2 % by weight) and chitosan nanocapsules containing essen...

Materials with antimicrobial properties are highly desirable for making food packaging and personal protective equipment due to their intrinsic ability to prevent the proliferation of pathogenic microorganisms and food contamination. Poly(lactic acid) (PLA) is a biodegradable, compostable, and recyclable polymer that presents interesting mechanical...

Surface modification corresponds to a set of viable technological approaches to introduce antimicrobial properties in materials that do not have such characteristics. Antimicrobial materials are important to prevent the proliferation of microorganisms and minimize the transmission of diseases caused by pathogens. Herein, poly(lactic acid) (PLA) was...

Iron Oxide Nanoparticles (IONPs) are generally assumed to be biologically inert, presenting chemical stability and low toxicity, and they can be hybridized with cellulosic matrixes aiming for biological applications (e.g. nanozymes). Two hydrothermal coprecipitation methods were applied, aiming to produce 2 different size Iron oxide nanoclusters, u...

The increase in global environmental impacts has driven the development of eco-friendly and biodegradable materials for the next product generation. The use of synthetic fibers presents ecological concerns, while natural fiber application as a reinforcing no-material in composite development has stood out as a viable alternative. Natural fibers pre...

The scientific community has been focusing on studying and understanding the extent of damage caused by microplastics (MPs) to flora, fauna, and humans, including the environmental and health risks associated with them. MPs with different morphologies have been described in different environments, with fibers being the most common type regardless o...

Multifunctional natural fibers with antimicrobial properties have been applied as a viable strategy to prevent microorganism contamination and proliferation on the surface of clothes and personal protection equipment marketed and used by health professionals, patients, and the general population. They present intrinsic antimicrobial capacity, provi...

This study aimed to evaluate the effect of pullulan (Pull) on a renewable polyurethane sponge‐like scaffold synthesized from the Pull mixture with the castor oil‐based polyol and the prepolymer using the situ foaming method. The Pull contents on the sponge‐like are 5, 10, and 20 wt.%. The samples were evaluated by optical microscopy (OM), scanning...

Essential oils have received increasing attention due to their known biological activities and health benefits. The emulsions should be more liquid or viscous (gels) based on the desired application. This work aimed to prepare ho wood (linalool) essential oil solutions or gels using the Pickering emulsion approach, providing a comprehensive overvie...

Due to high consumption and high demand for polyurethane (PU) foams, they are usually exposed to the environment, suffering the influence and action of weathering. Then, this work investigates the coffee husk residues (CHR) introduction to PU foams obtained from castor oil. A comparative study on the effect of weathering on neat PU foams and CHR-co...

O grão de soja é a comodity mais produzida no Brasil, gerando resíduos em grande quantidade. Estes resíduos podem ser explorados na produção de nanocelulose (NC), que é um material com aplicações limitadas, mas que pode ser muito versátil. Modificações que podem ser aplicadas neste material e ampliar ainda mais a sua versatilidade e consequentement...

Grape pomace (mixture of skins and seeds) is a residual by-product of the winemaking process, rich in polyphenolic compounds that have antioxidant and antimicrobial properties and can be recycled to manufacture fruit extracts to be used in new technological products. The use of non-toxic substances is exciting for developing packagings that are in...

Seawater contamination draws concerns due to its effect on the environment and living beings, where oil spillages are highlighted due to their severe impact. Conventional materials to deal with these problems present non-sustainable nature, and thus, new developments are being performed to develop materials that align sorption properties and higher...

This paper evaluates corn starch aerogels, studying different crosslinking agent (trisodium citrate) concentrations (1:1, 1:1.5, and 1:2) and sorption conditions (contact time, adsorbent weight, and initial concentration) regarding the potentially toxic elements (PTEs) [Cd(II) or Zn(II)] adsorption of the aqueous systems. Besides, other properties...

Pullulan has attracted considerable attention due to its immunogenicity, biodegradability, biocompatibility, and hydrophilic nature, making it useful in cosmetics and pharmaceutical applications. In addition, pullulan is considered a biopolymer capable of modification via chemical reactions, which is a promising strategy to expand the range of its...

The presence of microplastics (MPs) in different terrestrial ecosystems has adverse effects on planet biota and even on humans in the long term. However, few studies evaluate areas with a high circulation of people, such as parks. This work aimed to carry out a comparative study between the municipal landfill and one park in Santo André (SP), Brazi...

Exposure to potentially toxic metallic elements (PTME) released in watercourses by industries results in irreversible damage to living beings or even death. The removal of a PTME, such as hexavalent chromium (Cr(VI)) in industrial wastewater aligned with the reuse/modification of natural adsorbents, is a promising alternative to remedy this problem...

The reuse of waste products is the green key to sustainability. The extraction of cellulose nanofibers from Colocasia esculenta stems is presented in the paper. The study proved that the waste biomass could be effectively re-engineered into highly valued cellulose nanofibers (CNFs). Cellulose nanofibers were extracted via a chemo-mechanical route....

Reducing the amount of plastic packaging waste in the environment is a global challenge that has called for changes in polymer manufacturing. One alternative to minimize environmental and economic problems is the use of biodegradable polymers. In this work, biodegradable films of poly(butylene adipate-co-butylene terephthalate) (PBAT) incorporated...

Coronavirus Disease 2019 (COVID-19) occasioned global economic and health systems collapse. Also, it raised several concerns about using conventional cotton fabrics for manufacturing personal protective equipment without the antimicrobial capacity to inactivate viruses, such as Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and its va...

The current pandemic of Coronavirus Disease 2019 (COVID-19) raised several concerns about using conventional textiles for manufacturing personal protective equipment without self-disinfecting properties since the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) is transmitted mainly by aerosols that can transpose cotton masks. Therefore...

Multifunctional textiles have been quoted as a technologically and economically viable alternative to prevent the contamination and proliferation of microorganisms, increasing biomedical devices' safety by combining different properties with antimicrobial activities. The present work applied ultrasound waves to coat cotton fibers with ZnO and coppe...

Zinc oxide (ZnO) and ZnO-silver (ZnO-Ag) nanoparticles (NPs) are widely used in different fields, such as biomedicine and food packaging, due to their recognized antibacterial activity and safety for human health. In this paper, ZnO and ZnO-Ag NPs were incorporated into poly(butylene adipate-co-terephthalate) (PBAT), in two contents (0.5 and 1 wt%)...

This study assesses the potential revaluation of solid waste from palm residues for use as reinforcement in acrylonitrile butadiene styrene (ABS) matrix to develop a composite filament that is more environmentally friendly. Filaments were processed using a thermokinetic mixer and then processed by a mini extruder using different fiber loadings (5,...

Cellulose is a natural polysaccharide with beneficial adsorbent characteristics and a correct ecologically alternative material to design new adsorbents for water remediation contaminated with pollutants, such as metal ions that are toxic and nocive against biological systems. In this contribution, we confected foams based on cellulose nanofibrils...

Biodegradable composite materials were developed to act as substrates to treat gasoline-contaminated soil. The starch matrix (SM) and biodegradable composites (C) were prepared by extrusion, using thermoplastic starch (SM) [obtained from cassava peels and residual (blond) glycerin], and with the addition of 5 and 10 wt% of the zeolite (Z) or benton...

In this report, we applied cellulose nanofibrils (CNF) as a stabilizer of oil-in-water Pickering emulsion of Melaleuca alternifolia EO (MaEO). Different Pickering MaEO emulsion contents were applied in cotton fabrics, simulating the fabrication of antiseptic wet wipes. The prepared emulsion and the wet cotton wipes were characterized by Fourier-tra...