Results 11 to 20 of about 13,793 (204)
Chemical Science, 2022 A molecular folding strategy is developed to construct ferrocenyl diamino acid conjugated polyhedral oligosiloxane molecules. Hydrogen bonding-driven folding facilitates the chirality transfer from the molecular scale to the micrometer scale.
Zhaohui Zong +3 more
openaire +3 more sources
Glycolysis of Polyurethanes Composites Containing Nanosilica [PDF]
Polymers, 2021 Rigid polyurethane (RPU) foams have been successfully glycolyzed by using diethylene glycol (DEG) and crude glycerol (CG) as transesterification agents. However, DEG did not allow to achieve a split-phase process, obtaining a product with low polyol purity (61.7 wt %).
Jesus del Amo +3 more
openaire +2 more sources
Nanosilica and Polyacrylate/Nanosilica: A Comparative Study of Acute Toxicity [PDF]
BioMed Research International, 2016 We compared the acute toxicity of nanosilica and polyacrylate/nanosilica instillation in Wistar rats (n=60). Exposure to nanosilica and polyacrylate/nanosilica showed a 30% mortality rate. When compared with saline-treated rats, animals in both exposure groups exhibited a significant reduction of PO2(P<0.05) at both 24 and 72 hr.
Niu, Ying-Mei +8 more
openaire +2 more sources
Nanosilica-Toughened Epoxy Resins [PDF]
Polymers, 2020 Surface-modified silica nanoparticles are available as concentrates in epoxy resins in industrial quantities for nearly 20 years. Meanwhile, they are used in many epoxy resin formulations for various applications like fiber-reinforced composites, adhesives or electronic components; even in space vehicles like satellites.
openaire +2 more sources
The nanosilica hazard: another variable entity [PDF]
Particle and Fibre Toxicology, 2010 AbstractSilica nanoparticles (SNPs) are produced on an industrial scale and are an addition to a growing number of commercial products. SNPs also have great potential for a variety of diagnostic and therapeutic applications in medicine. Contrary to the well-studied crystalline micron-sized silica, relatively little information exists on the toxicity of
Napierska, Dorota +4 more
openaire +5 more sources
Advances in Materials Science and Engineering, 2022 In the current work, the experimentations have been accomplished to assess the impact of diffusing nanosilica particles in epoxy matrix on the mechanical and thermal performance of the luffa fibre reinforced epoxy composite material. The matrix and fibre
Rajasekaran Saminathan +7 more
doaj +1 more source
Frontiers in Materials, 2023 In the reported work, the wool fabric was coated with epoxy resin by hand layup method to fabricate the wool-epoxy composites. Hydrophobic nanosilica was used as a filler to improve their mechanical characteristics.
Seiko Jose +7 more
doaj +1 more source
International Journal of Polymer Science, 2021 The hydrophilic surface of fumed nanosilica was modified to a hydrophobic surface by treating it with a trimethyl silane coupling agent, and epoxy nanocomposites were prepared by mixing the modified nanosilica (0 phr, 1 phr, 3 phr, 5 phr, and 7 phr) in ...
Jae-Jun Park
doaj +1 more source
Improvement of Concrete Characterization Using Nanosilica [PDF]
Computational Engineering and Physical Modeling, 2021 In recent years, different research works have been conducted to evaluate the addition of nanometer materials to concrete materials. In this paper, the influence of Nanosilica on compressive strength, abrasive strength, durability, and improvements in ...
Esmail Shahrokhinasab +3 more
doaj +1 more source
Impact Properties of Recycled Aggregate Concrete with Nanosilica Modification
Advances in Civil Engineering, 2020 The optimal soaking time and nanosilica concentration were chosen by the physical properties of the nanosilica-modified recycled aggregate. Recycled aggregate concrete (RAC) and nanosilica recycled aggregate concrete (SRAC) were fabricated by using ...
Xingguo Wang +4 more
doaj +1 more source