Statistical analysis of notch toughness of epoxy matrix composites reinforced with fique fabric

Publication date: Available online 10 November 2019Source: Journal of Materials Research and TechnologyAuthor(s): Michelle Souza Oliveira, Fabio da Costa Garcia Filho, Fernanda Santos da Luz, Artur Camposo Pereira, Luana Cristyne da Cruz Demosthenes, Lucio Fabio Cassiano Nascimento, Henry Alonso Colorado Lopera, Sergio Neves MonteiroAbstractReinforcement of polymer matrices with natural lignocellulosic fibers (NLFs) is today presenting great potential for the reduction of both product weight and cost in many industrial sectors as well as the advantage of being renewable and eco-friendly materials. For some industrial applications, especially in ballistic armor, the materials are expected to meet technical and mechanical requirements in terms of impact behavior, which motivate the present work. This work conducted a notch toughness assessment by Izod and Charpy impact tests of epoxy matrix composites reinforced with different volume fractions of fique fabric, up to 50 vol%. Statistical analyses indicated significant differences between composites with distinct amount of fique fabric. Failure mechanisms were analyzed by scanning electron microscopy (SEM). The results revealed that composite reinforced with 40 vol% of fique fabric presented the best notch toughness performance. Composites with 15 and 30 vol% of fique fabric display predominantly brittle fracture associated with lower impact energies. With higher amount, 50 vol%, of fique fabric reinforcement ...
Source: Journal of Materials Research and Technology - Category: Materials Science Source Type: research

Related Links:

ConclusionsOrbital floor reconstruction performed via transmaxillary endoscopy is a safe technique, which allows for detailed visualization of the fracture rim, avoids external scars, and permits an easier reduction of the prolapsed orbital content into the overlying orbital cavity. Virtual planning plays an important role in defining the appropriate geometry of the bone graft and establishing the optimal reconstruction strategy. Our preliminary results indicate that virtual planning and 3D printing should become part of an integrated protocol for the endoscopic treatment of orbital floor fractures.
Source: Journal of Cranio Maxillofacial Surgery - Category: ENT & OMF Source Type: research
Heather Provino, managing partner of The Scanlon Group, explains why the last few years in particular have been exciting for population health's digitization.
Source: Healthcare ITNews Videos - Category: Information Technology Tags: Population Health Women In Health IT Source Type: video
Abstract Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are powerful molecular imaging methods for examining disease-related factors in the whole body using specific imaging probes. Recently, we tried to develop molecular imaging probes that specifically visualize pathological factors associated with cancers and infectious diseases. Although survivin is highly expressed in several cancers, its expression is undetectable in non-dividing tissues. Thus, we developed several small molecular imaging probes that target survivin. These ligands not only showed high affinity for s...
Source: Yakugaku Zasshi : Journal of the Pharmaceutical Society of Japan - Category: Drugs & Pharmacology Authors: Tags: Yakugaku Zasshi Source Type: research
This study is the first paper to test simultaneously the effects of 10 anticholinergic drugs used currently for the therapy of OAB, on the P-glycoprotein. PMID: 31787715 [PubMed - in process]
Source: Biological and Pharmaceutical Bulletin - Category: Drugs & Pharmacology Authors: Tags: Biol Pharm Bull Source Type: research
Authors: Lin CY, Chang YC, Wang IT, Hsieh MH, Wang CW, Lin SM, Wu CY, Fang YF Abstract Pretreatment tumor metabolic burden, measured using fluorine-18 fluorodeoxyglucose positron emission tomography/computerized tomography (18F-FDG PET/CT), has been demonstrated to predict outcomes in various types of malignancies. Additionally, Epstein-Barr virus (EBV) serum titer is associated with stages of pulmonary lymphoepithelioma-like carcinoma (LELC). The present study aimed to investigate the prognostic value of the functional parameters of 18F-FDG PET/CT in pulmonary LELC and their association with serum EBV DNA. The pre...
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research
Authors: Størup G, Sørensen AN, Dalsgaard A, Grønkjær M Abstract INTRODUCTION: For decades, ultrasound has enabled determination of foetal sex. Foetal sex is medically indicated in sex-linked diseases, syndromes and multiple pregnancy, but genital malformations are rare. However, guidelines on standard views seem sparse and foetal sex determination is not considered mandatory. The aim of this study was to provide an initial overview on the practice of foetal sex determination in Denmark and the accuracy of the examinations at the second trimester anomaly scan at a regional and a universit...
Source: Danish Medical Journal - Category: General Medicine Tags: Dan Med J Source Type: research
Conclusions: The TRANSITION-programme is a promising concept that deserves further evaluation. PMID: 31790309 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Occupational Therapy - Category: Occupational Health Tags: Scand J Occup Ther Source Type: research
Conclusions and significance: Occupational adaptation is a concept applied across many practice and research contexts, yet the concept is not fully mature. Concept refinement is required before further applied research is conducted. A shared understanding of occupational adaptation through refinement and research may consolidate its importance and future utility. PMID: 31786968 [PubMed - as supplied by publisher]
Source: Scandinavian Journal of Occupational Therapy - Category: Occupational Health Tags: Scand J Occup Ther Source Type: research
We report on a patient with severe psoriasis vulgaris who developed drug-induced interstitial lung disease (DILD) during treatment with ustekinumab. The diagnosis was based on coincidence with start of therapy, high-resolution computer tomography of the thorax and bronchoalveolar lavage. After discontinuation of the treatment with ustekinumab the clinical symptoms and the chest scan results improved. This case highlights a possible adverse event of ustekinumab. PMID: 31792580 [PubMed - as supplied by publisher]
Source: Der Hautarzt: Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete - Category: Dermatology Tags: Hautarzt Source Type: research
In this study we design green synthesis of a novel ZnO nanocarrier loaded with paclitaxel as a drug delivery system with high cytotoxicity against breast cancer cell line (MCF-7) and low side effects on the normal cell line (fibroblast). Paclitaxel is formulated in high concentration in Cremophor EL because of its low solubility. Zinc oxide nanoparticles (ZnO NPs) were prepared by the ethanolic extract of Camellia sinensis L., then coated with chitosan (Ch) and loaded with paclitaxel (PTX) to improve drug delivery. The physicochemical properties were observed by transmission electron microscopy (TEM), thermo-gravimetric an...
Source: Colloids and Surfaces B: Biointerfaces - Category: Biochemistry Source Type: research
More News: Materials Science | PET Scan | Statistics