Avener Gleidson Andrade Santos

Mr. Avener Gleidson Andrade Santos

PPGCIMAT, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 February 2025 in Polymers
Verified
Journal Article
Open access
PDF file
ASAvener Gleidson Andrade Santos
Avener Gleidson Andrade Santos
DNDamares Nascimento
Damares Nascimento
Felipe Perissé Duarte LopesFelipe Perissé Duarte Lopes
Felipe Perissé Duarte Lopes
NSNoan Tonini Simonassi
Noan Tonini Simonassi
Sergio Neves MonteiroSergio Neves Monteiro
Sergio Neves Monteiro
VCVerônica Scarpini Candido
Verônica Scarpini Candido
The search for new natural, sustainable, economical and biodegradable reinforcements for composite materials has increased in recent years, highlighting the importance of fibers from the natural environment. This work evaluates the use of tururi fibrous fabric as a reinforcement in a polymer matrix, using Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry and scanning electron microscopy. The mechanical and fractographic performance of composites reinforced with 2.5, 5.0 and 7.5% mass fraction of tururi in a polyester matrix is also investigated. The FTIR and XRD results identified groups characteristic of natural fibers and the presence of elemental constituents such as cellulose, hemicellulose and lignin. Thermogravimetry indicated good thermal stability near 246 °C. The morphology of the fibrous fabric is irregular and formed by tangles of threads. The mechanical behavior of the composites in bending revealed a variation in stress with the increase in the percentage of fabric in the matrix, explained by defects and failures due to low interfacial adhesion between the phases. Impact tests indicated that increasing the percentage of fabric in the matrix improves impact energy absorption, reflecting better adhesion and load distribution. Thus, the development of this natural composite is promising for applications in green and sustainable products.

29 July 2026 in Polymers
Verified
Journal Article
Open access
PDF file
ASAna Telma Costa Silva
Ana Telma Costa Silva
Nuno Miguel FerreiraNuno Miguel Ferreira
Nuno Miguel Ferreira
ASAvener Gleidson Andrade Santos
Avener Gleidson Andrade Santos
Ana Colette MaurícioAna Colette Maurício
Ana Colette Maurício
Nuno AlvesNuno Alves
Nuno Alves
Maria Elisabete Teixeira SilvaMaria Elisabete Teixeira Silva
Maria Elisabete Teixeira Silva
Conventional synthetic meshes for pelvic organ prolapse (POP) frequently cause severe complications, such as tissue erosion, due to a profound mechanical mismatch with native tissue. This study proposes a novel biphasic composite scaffold combining a load-bearing melt electrowritten (MEW) polycaprolactone (PCL) framework with a compliant alginate–gelatin (Alg-Gel) hydrogel matrix. PCL meshes (1.5 and 2.0 mm pores) were infiltrated with varying Alg-Gel ratios (4:3 and 5:2) and structurally evaluated through mechanical testing, swelling/degradation assays in a simulated acidic vaginal environment (pH 4.3), and finite element analysis (FEA). Results demonstrated that the 1.5 mm PCL architecture provides a robust baseline to withstand physiological loads. Notably, the hydrogel matrix provides a viscoelastic damping effect that synergistically improves the overall mechanical stability of the composite. Furthermore, FEA accurately predicted the non-linear macroscopic response of the composite constructs. Modulating the Alg-Gel ratio also enabled precise tuning of swelling capacity (up to 1400%) and degradation kinetics. Ultimately, this biomimetic system offers a highly adaptable, tissue-like protective cushion with enhanced dynamic stability, presenting a versatile platform for future in vivovalidation.