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Antykorozyjne powłoki na bazie surowca odnawialnego z dodatkiem nanomagnetytu

Roguszewska Marlena, Parzuchowski Paweł G., Rokicki Gabriel, Tkacz Damian

Inżynieria Materiałowa

2022

Vol. 43, nr 4

21--26

Przedstawiono właściwości powłok na bazie surowca odnawialnego (kwasu rycynolowego pozyskiwanego z oleju rycynowego) i żywicy epoksydowej. Ze względu na dużą lepkość takiego oligoestrolu prowadzono modyfikację za pomocą oligowęglanodioli, oligoeterodioli oraz oligobutadienu zakończonego grupami hydroksylowymi. Przygotowano także powłoki z dodatkiem napełniaczy nieorganicznych. W celu zapewnienia właściwości antykorozyjnych dodawano nanomagetyt, minerał należący do spineli, jeden z najsilniejszych magnetyków występujących na ziemi.

This publication presents the properties of coatings based on a renewable raw material (ricinoleic acid obtained from castor oil) and an epoxy resin. Due to the high viscosity the biobased oligoestrol, modification with oligocarbonate diols, oligoether diols and oligobutadiene terminated with hydroxyl groups was carried out. Coatings with the addition of inorganic fillers were also prepared. Nanomagetite, a mineral belonging to spinel, one of the strongest magnetics found on earth, was added to provide anti-corrosion properties.

Magnetyczne oddziaływania nadwymienne przez wiązania wodorowe

Korabik M.

Wiadomości Chemiczne

2008

[Z] 62, 5-6

449-478

Hydrogen bonds play a key role in interactions in biological structures, supramolecular chemistry, and crystal engineering [28, 29]. The development of supramolecular structure created by hydrogen bonds is a new challenge for the synthesis of materials, in order to study their magnetic behaviour [59, 62]. A role played by hydrogen bonds in the transmission of magnetic interactions is still not fully understood, but the number of magnetically coupled hydrogen-bonded systems is growing. The present paper describes magnetic properties of copper(II) complexes [33] with nitrobenzoate and salicylate ligands where the system of hydrogen bonds O-HźźźO is the only path of magnetic interaction. Magnetic measurements in the temperature range 1.8-300 K show magnetic phase-transition at 6 K to antiferromagnetically coupled CuII dimers with singlet-tryplet energy gap 2J = -6.26 cm-1. A variety of different supramolecular hydrogen bond structures [27, 33-52, 57-62] and significant changes in their magnetic properties were analyzed to show the role of hydrogen bonds in magnetic interactions. Magnetostructural correlation has been made taking into account both covalently bridging ligand and the existence of intermolecular hydrogen bonds. An evidence for hydrogen-bond-mediated exchange coupling has been observed in magnetic study as well as in DFT calculations [40, 48]. Intermolecular interaction has been generally treated as a nuance, but today, it has established itself as an important functional tool, tunable at will [59] in the design of nanosized magnetic materials and their dimensionally-expanded compounds [57-62]. Intermolecular magnetic exchange interactions through hydrogen bonds, can have a large influence on the quantum properties of single molecular magnets SMMs [59]. Hydrogen bonding leads to coupling of the magnetic effects of individual SMMs units and to different quantum behaviour. Even very weak hydrogen bond inter-molecular interactions demonstrate a possibility of switching from an original nanosized magnetic system to a correlated system, for example, from single molecule magnet SMM to single chain magnet SCM or from such nanosized magnets to a bulk magnet [59].