Shear thickening fluids (STFs) are innovative materials that can find applications in smart body armor. However, the usage of STFs is limited by the aging of these materials. This work aims to analyze the influence of UV radiation on the aging process of STFs. The investigation was done experimentally, and artificial aging was applied to investigate the impact of UV radiation on the properties of STFs. The shear-thickening properties of obtained STFs were confirmed by viscosity measurements. The STFs based on PPG425, PPG2700, and KE-P10 exhibited a very high maximum viscosity of up to 580.7 Pa·s and 3313 Pa·s for the STF425 and STF2700, respectively. The aging of the obtained STFs caused the liquid matrix degradation, causing damage to the STFs and their change from liquid into solid. Furthermore, the FT-IR, H NMR, and C NMR spectroscopies were used for the confirmation of the breakdown of STFs. The FT-IR spectroscopy revealed the appearance of carbonyl groups in STFs after aging. Moreover, H NMR and C NMR spectroscopy confirmed the formation of the typical groups containing carbonyl groups. Our results demonstrate that STFs are UV light-sensitive and may lose their properties during storage.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9100338 | PMC |
| http://dx.doi.org/10.3390/ma15093269 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Whole-gland or Subtotal High-intensity Focused Ultrasound Versus Radical Prostatectomy: The Prospective, Noninferiority, Nonrandomized HIFI Trial.
Eur Urol
December 2024
Department of Urology, CHU Toulouse, Toulouse, France.
Article Synopsis
- A French nationwide trial compared high-intensity focused ultrasound (HIFU) with radical prostatectomy (RP) for treating localized prostate cancer, focusing on salvage therapy-free survival (STFS) and other outcomes in 3328 patients from 2015 to 2019.
- HIFU showed similar STFS at 30 months compared to RP, with lower rates of urinary continence deterioration and less significant erectile function decline among HIFU patients, although some limitations like lack of randomization and age differences in groups were noted.
- The study suggests that HIFU is a viable alternative to RP for low- to intermediate-risk prostate cancer with favorable outcomes for urinary and sexual function, indicating
On the Complex Flow Dynamics of Shear Thickening Fluids Entry Flows.
Micromachines (Basel)
October 2024
ALiCE-Laboratório Associado em Engenharia Química, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Due to their nature, using shear thickening fluids (STFs) in engineering applications has sparked an interest in developing energy-dissipating systems, such as damping devices or shock absorbers. The Rheinforce technology allows the design of customized energy dissipative composites by embedding microfluidic channels filled with STFs in a scaffold material. One of the reasons for using microfluidic channels is that their shape can be numerically optimized to control pressure drop (also known as rectifiers); thus, by controlling the pressure drop, it is possible to control the energy dissipated by the viscous effect.
View Article and Find Full Text PDFAzopyridine Polymers in Organic Phase Change Materials for High Energy Density Photothermal Storage and Controlled Release.
Angew Chem Int Ed Engl
November 2024
Beijing University of Chemical Technology Institute of Advanced Technology and Equipment, Beijing, 100029, China.
Azo-compounds molecules and phase change materials offer potential applications for sustainable energy systems through the storage and controllable release photochemical and phase change energy. Developing novel and highly efficient Azo-based solar thermal fuels (STFs) for photothermal energy storage and synergistic cooperation with organic phase change materials present significant challenges. Herein, three types of (ortho-, meta-, and para-) azopyridine polymers hinged with flexible alkyl chain are synthesized, in which meta-azopyridine polymer exhibits striking photothermal storage capacity of 430 J/g, providing a feasibility solution for developing high energy density Azo-based STFs.
View Article and Find Full Text PDFEstablishment and validation of a prognostic nomogram for severe fever with thrombocytopenia syndrome: A retrospective observational study.
PLoS One
October 2024
Department of Intensive Care Unit, The Second Hospital of Nanjing, Affiliated to Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.
Article Synopsis
- A new prognostic nomogram was developed to predict mortality risk associated with severe fever with thrombocytopenia syndrome (STFS), addressing limitations of previous scoring systems.
- Key variables identified as significant predictors include age, consciousness, SOFA score, CRRT, and D-dimer levels.
- The new nomogram outperformed existing models, providing better accuracy and sensitivity in predicting STFS-related death, making it a valuable tool for clinical practice.
Feasibility of Vis-NIR spectroscopy approach to predict soil biological attributes in arid land soils.
PLoS One
September 2024
Department of Soil Science, College of Agriculture, Shiraz University, Shiraz, Iran.
Visible and near-infrared (Vis-NIR) reflectance spectroscopy has recently emerged as an efficient and cost-effective tool for monitoring soil parameters and provides an extensive array of measurements swiftly. This study sought to predict fundamental biological attributes of calcareous soils using spectral reflectance data in the Vis-NIR range through the application of partial least square regression (PLSR) and stepwise multiple linear regression (SMLR) techniques. The objective was to derive spectrotransfer functions (STFs) to predict selected soil biological attributes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!