Article
Polymer Science
Ayano Yoshitake, Hiroyuki Kudo, Hidetoshi Matsumoto, Masatoshi Tokita
Summary: Incorporating a short perfluoroethylene Rf chain at the end of syndiotactic poly(substituted methylene) side chains enhances hydrophobicity and prolongs water repellency. The persistent water repellency of PM is attributed to its liquid crystal structure, with side chains extending perpendicularly from the main chains.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Zuozhu Yin, Feng Yuan, Dongpeng Zhou, Mingshan Xue, Yidan Luo, Zhen Hong, Chan Xie
Summary: In this study, four types of ZnO SPS were fabricated using different zinc sources, with ZnO nanoribbons SPS showing the longest delayed icing time at -5°C. However, the anti-icing ability of ZnO nanoribbons SPS decreased significantly with decreasing temperature. This work provides practical application for enhancing the anti-icing ability of Cu-based PCB in electronic packaging.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Construction & Building Technology
Jun-Hua Wu, Wei-Chao Ao, Mao-Sheng Wang, Jia-Ming Liu, Fang-Yuan Fu
Summary: Octadecylamine was used as a primary water repellent in modified expansive soil, and an increase in octadecylamine content resulted in improved water repellency and reduced expansion deformation. Higher water content and octadecylamine content led to stabilized free, unloaded, and loaded swelling rates in modified expansive soil.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Biology
Melodi Yenmis, Yusuf Bayrakci, Dincer Ayaz
Summary: This study compares the scale microstructure of two snake species that occupy different ecological niches, and finds that microstructural features may be indicative of taxonomic relationship while pore number is negatively correlated with wettability.
Article
Materials Science, Multidisciplinary
Tugba Demir Caliskan, Kubra Ozkan Hukum, Tuncer Caykara, Igor Luzinov
Summary: This study presents a straightforward approach to fabricating nanocoatings based on perfluoropolyether (PFPE), which can significantly reduce the spreading of oil and water on coated surfaces. By depositing an anchoring layer and grafting layer on the silicon surface, the surface energy and wettability are effectively decreased, leading to lower oil and water spreading.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Environmental Sciences
M. R. Abou Najm, Ryan D. Stewart, Simone Di Prima, Laurent Lassabatere
Summary: The study proposed a simple rate-based correction term to simulate decreasing soil water repellency over time, which significantly reduced model errors, especially in soils with higher water repellency. The new model introduced a rate constant parameter that may aid in better understanding the dynamics of soil water repellency and provide more consistent interpretations of hydraulic properties in water-repellent soils.
WATER RESOURCES RESEARCH
(2021)
Article
Polymer Science
Liying Wei, Tugba D. Caliskan, Philip J. Brown, Igor Luzinov
Summary: FOPUs based on PFPE were synthesized as low-surface-energy materials and can serve as safer alternatives to long-chain perfluoroalkyl substances/additives. When added to PET films, these FOPUs significantly improve water and oil repellency of the thermoplastic, with the best performance achieved by an oligomeric additive terminated with CF3 groups.
Article
Environmental Sciences
Edyta Hewelke, Jerzy Weber, Dariusz Gozdowski, Piotr Hewelke
Summary: This paper investigates the impact of petroleum hydrocarbon contamination on soil water sorptivity and hydrophobicity. It is found that contamination with petroleum hydrocarbons reduces soil water sorptivity and increases soil water repellency. The results suggest that the interrelationship between contamination level, water sorptivity, soil water repellency, and soil moisture is crucial in predicting the environmental effects of petroleum hydrocarbon contamination.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Materials Science, Textiles
Massumeh Parsamanesh, Shahla Shekarriz
Summary: In this study, the effect of a non-formaldehyde crosslinking agent based on polyurethane on the water/oil repellency and durability of cotton fabric was investigated. The cotton fabric was first treated with crosslinking polyurethane, followed by treatment in a silica-fluorocarbon ultrasonic bath. The results showed that sample 4 (CPN 6%, nano-silica of 1%, FB of 8%) exhibited the best water/oil repellency, with a contact angle of 130 degrees. The crease recovery angle of the crosslinked fabrics reached 234 degrees.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Textiles
Massumeh Parsamanesh, Shahla Shekarriz
Summary: A study was conducted to improve the water/oil repellency and durability of cotton fabric by using a non-formaldehyde cross-linking agent, fluorocarbon, and nano-silica compounds. Sample 4 showed the best results, with a contact angle of 130 degrees and maintained good water/oil repellency after washing and heat treatment.
FIBERS AND POLYMERS
(2023)
Review
Environmental Sciences
K. R. J. Smettem, C. Rye, D. J. Henry, S. J. Sochacki, R. J. Harper
Summary: This review explores the impact of soil water repellency (SWR) in natural ecosystems and how it is influenced by five spheres of influence, including surface properties, atmosphere, hydrosphere, anthroposphere, and interactions between these spheres. The study reveals that SWR in natural ecosystems has developed as an indirect consequence of evolution, and highlights the differences in management and restoration of ecosystems with water repellent soils compared to agricultural systems controlled by human activities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Soil Science
Masako Kajiura, Takeshi Tange
Summary: This research found that the organic layer can reduce surface runoff by decreasing soil water repellency and maintaining both water repellent and wettable regions.
Article
Chemistry, Applied
Karekin D. Esmeryan, Todor A. Chaushev
Summary: Using superhydrophobic coatings can prevent the undesired translocation of marine microorganisms during sailing and excessive ship hull repairment due to biofouling. However, the anti-microbial performance of existing non-wettable materials is still in its early stages when exposed to underwater currents and colonizing activity. This study evaluates the potential of two mechanically durable water-repellent soot coatings in inhibiting bacterial proliferation in real-life outdoor conditions for the first time. The observed selective anti-fouling behavior is attributed to differences in cell envelopes, oxidative stress, and soot-mediated formation of toxic ammonia molecules.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Geosciences, Multidisciplinary
Edyta Hewelke, Dariusz Gozdowski, Marian Korc, Ilona Maluszynska, Ewa Beata Gorska, Wojciech Sas, Lilla Mielnik
Summary: Soil water repellency is a dynamic property of soil that depends on factors such as climate warming and increased frequency of droughts. Studies have found that on sandy soil, pine sites exhibit more persistent and severe water repellency compared to regions with a warmer climate, potentially playing a key role in identifying soil drying risks.
Article
Engineering, Geological
Zheng Zhou, Anthony Kwan Leung, Ali Akbar Karimzadeh, Chun Hei Lau, Ka Wai Li
Summary: The study conducted parametric infiltration tests to evaluate the effects of a hydrophobized barrier on water infiltration characteristics in soil. The results showed that the barrier could effectively prevent water infiltration under certain conditions.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)