Article
Materials Science, Multidisciplinary
Junsong Wu, Wei Jiang, Chunyan Yan, Ziqi Lu, Mengting Yan, X. Li
Summary: The purpose of this research is to create a multi-layer porous scaffold with different porosity, and perform analytical investigation using fuzzy uncertainty. The mechanical properties of compressive strength and elastic modulus were measured, and Abaqus software was used for modeling study. The results suggest that using composites with negative longitudinal expansion coefficient can reduce mechanical deformation. Additionally, scanning electron microscope analysis revealed the morphology and pore size changes in the samples.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Indrika Novella, Bedah Rupaedah, Diana Rakhmawaty Eddy, y Suryana, Ferli Septi Irwansyah, Atiek Rostika Noviyanti
Summary: Hydroxyapatite (HA) was synthesized using a hydrothermal method with chicken eggshells as a calcium source and polyvinyl alcohol as a porogen. The structure and morphology of HA were determined by XRD and SEM, respectively. The study found that the variation of unit cell parameters of HA synthesized using PVA porogen was low, meeting the standard requirements. A hexagonal structure HA was also successfully obtained. In addition, the porosity of HA increased with increasing concentrations of polyvinyl alcohol.
Article
Polymer Science
Mengxia Wang, Xiaran Miao, Hui Li, Chunhai Chen
Summary: This study focuses on the fabrication of polyvinyl alcohol (PVA) composite films reinforced with cellulose nanofibers (CNF) of different lengths. The addition of CNF significantly improves the mechanical properties and thermal behavior of the composite films, with a slight decrease in optical transparency. Interestingly, the PVA/CNF20 nanocomposite films exhibit higher tensile strength and elastic modulus compared to PVA/CNF10 films.
Article
Thermodynamics
Fan Yang, Weihua Xie, Songhe Meng
Summary: Ceramic matrix composites with excellent oxidation resistance are desirable for the thermal protection system of hypersonic flight vehicles. Transpiration cooling has been proven to be an effective method, and SiC porous ceramics show superior performance in this cooling technique.
APPLIED THERMAL ENGINEERING
(2023)
Article
Polymer Science
Rustam Sadykov, Daria Lytkina, Ksenia Stepanova, Irina Kurzina
Summary: The field of biomedical materials science is actively developing, focusing on creating new functional materials. One promising direction is the use of biodegradable composite materials based on polymer and calcium phosphate materials for treating bone tissue disorders. In this study, a material based on polyvinyl alcohol cryogel mineralized with calcium phosphate was developed. The composites were obtained through cyclic freezing-thawing, and the synthesis of calcium phosphates was achieved through heating, stirring, and exposure to microwave radiation. The material showed improved viability in monocytes isolated from human blood compared to the controls.
Article
Engineering, Biomedical
Umit Erdem, Deniz Dogan, Busra M. Bozer, Mustafa B. Turkoz, Gurcan Yildirim, Aysegul U. Metin
Summary: This study produced PDA-coated HA reinforced PVA films with enhanced mechanical properties and biological activity, showing excellent antibacterial capacities and biocompatibility for potential applications in biomedical fields, especially in tooth-bone treatments for coating, filling, or occlusion purposes.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Jian Xu, Wei Song, Nan Wu, Jin Tong, Lili Ren
Summary: By controlling the content of added polyvinyl alcohol (PVA), the structure and properties of chitosan/polyvinyl alcohol (CS/PVA) porous aerogel microspheres can be manipulated to enhance their physicochemical characteristics. This study demonstrates the potential to improve the structure and performance of hybrid aerogel microspheres by adjusting the content of PVA.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Materials Science, Multidisciplinary
Alessandro Dutto, Michele Zanini, Etienne Jeoffroy, Elena Tervoort, Saurabh A. Mhatre, Zachary B. Seibold, Martin Bechthold, Andre R. Studart
Summary: A 3D printing process is developed to create thermal insulation materials using recyclable clay. By optimizing printing parameters and sintering conditions, inexpensive bricks with structural, thermal insulating, and passive cooling capabilities are manufactured.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Polymer Science
Andreea Irina Barzic, Raluca Marinica Albu, Iuliana Stoica, Cristina-Delia Nechifor, Mihaela Iuliana Avadanei, Dan Gheorghe Dimitriu, Dana Ortansa Dorohoi
Summary: This study focuses on inducing molecular ordering in polyvinyl alcohol films and quantifies the level of chain alignment in the samples using various experimental techniques. The proposed approach of combined rubbing, drawing, and scratching was found to be the most suitable for compensating light leakage as a retardation layer in display devices.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Engineering, Environmental
Gokila Subburam, K. Ramachandran, Sherif A. El-Khodary, Bobo Zou, Juan Wang, Liaoliao Wang, Jingxia Qiu, Xianhu Liu, Dickon H. L. Ng, Jiabiao Lian
Summary: The study demonstrates that 3D porous carbon nanosheets synthesized using ascorbic acid and polyvinyl alcohol exhibit high specific capacity and superior rate performance, as well as outstanding cycling stability in sodium-ion capacitors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Aerospace
Hassan Saad Ifti, Tobias Hermann, Matthew McGilvray, Laura Larrimbe, Rowan Hedgecock, Luc Vandeperre
Summary: This study experimentally investigates the flow behavior of porous ultra-high-temperature ceramics for transpiration cooling of hypersonic vehicles. The results show that cleaning the sample surface can increase the permeability and the outflow velocity distribution exhibits good uniformity.
Article
Construction & Building Technology
Dongting Cao, Yue Gu, Linhua Jiang, Weizhun Jin, Kai Lyu, Mingzhi Guo
Summary: The incorporation of carbon fixation components (calcium hydroxide) can enhance the carbon fixation performance of foam concrete but reduce its mechanical properties. To mitigate the adverse effects and optimize carbon absorption properties, a certain amount of polyvinyl alcohol (PVA) was added. The study investigated the production process of nano-modified foam and analyzed the properties, micromorphology, pore structure, and mineral phases of the foam concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Tanchanok Parivatphun, Supaporn Sangkert, Rungrote Kokoo, Matthana Khangkhamano, Jirut Meesane
Summary: Biphasic scaffolds were created based on mimicking materials design and characterized for their molecular organization and morphology. The results showed that these scaffolds exhibited excellent performance in terms of swelling, mechanical strength, and cell proliferation. The study concluded that PVA/5% SF could be a promising biphasic scaffold for oral and maxillofacial surgery.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Polymer Science
Narayanan Valarmathi, Kalidas Sabareeswari, Shanmugam Sumathi
Summary: Sol-gel method is used to prepare copper and strontium substituted hydroxyapatite (Cu-Sr-HAP). Electrospinning method is used to prepare chitosan (CS)/polyvinyl alcohol (PVA)/gelatin (Gel) and (Cu-Sr-HAP)/CS/PVA/Gel composites. The structure of the electrospun composites is characterized by various analytical techniques such as X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), and scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDAX). (Cu-Sr-HAP)/CS/PVA/Gel electrospun composite showed excellent antimicrobial activity compared to pure CS/PVA/Gel composite. In vitro biomineralization assay confirmed the formation of an apatite layer on the surface of (Cu-Sr-HAP)/CS/PVA/Gel composite. The Cu-Sr-HAP)/CS/PVA/Gel electrospun composite exhibited a tensile strength of 65.45 +/- 1.27 MPa and an elongation at break value of 121.28 +/- 1.76%.
Article
Construction & Building Technology
Ekaterina Kravchenko, Chuhao Qin, Zhenzhen Lin, Charles Wang Wai Ng
Summary: Treating steel slag with an environmentally friendly solution of polyvinyl alcohol (PVA) can increase its carbon sequestration capacity, making it a potential solution to reduce global greenhouse gas emissions produced by the construction industry.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
