Novel ferrofluids coated with a renewable material obtained from cashew nut shell liquid

Abstract

In this work, we present the synthesis and characterization of a new surfactant molecule obtained from a byproduct of the cashew nut processing (diphosphorylated cardol, DPC). It is herein used to overcoat magnetic nanoparticles showing spinel structures in order to create new ferrofluids. The nanoparticle structure and magnetic properties have been deeply investigated. DPCfunctionalized Fe 3 O 4 and NiFe 2 O 4 samples exhibit higher magnetic saturation than DPC-CoFe 2 O 4 . These new ferrofluids reveal appealing as possible nanoparticle stabilizing molecules, magnetic resonance imaging agents, storage systems or in any material science field that requires the employment of biocompatible magnetic stable fluids.

Production of flavor esters catalyzed by lipase B from Candida antarctica immobilized on magnetic nanoparticles

“…Iron magnetic nanoparticles (), here named MNP, were obtained by the co-precipitation method to obtain a particlesize of 11.0 nm (Barreto et al, 2012).…”

“…Besides, nanoparticles offer a high surface/ volume ratio (Ansari et al, 2012) which can be properly modified to attach enzymes (Tartaj et al, 2003), resulting in a high biocatalyst concentration in the support. For instance, hydroxyl groups can be used to define attachment points for functionalizing agents (Barreto et al, 2012, Boyer et al, 2010 and enzyme immobilization. Another important feature of these non-porous supports is the smaller size of the particles, resulting in a reduction of the diffusion hindrance (Zheng et al, 2003).As a result, a significant progress in the last few years has been made in the use of magnetic nanoparticles as carrier for the binding of enzymes.…”

NANOBIOCATALYTIC SYSTEMS BASED ON LIPASE-Fe3O4 AND CONVENTIONAL SYSTEMS FOR ISONIAZID SYNTHESIS: A COMPARATIVE STUDY

“…Fe +2 and Fe +3 salts precursors are mixed in solution with the addition of a weak base to cause precipitation of the nanoparticles to form a good crystalline phase. It is possible to control the form (size and homogeneity) and structure (morphology) to obtain different shapes (microspheres, nanospheres, nanorods and ferrofluids) and sizes for MNPs (Adachi et al, 2004;Young et al, 2008;Law et al, 2009;Jang et al, 2010;Barreto et al, 2011). This paper aims to report a synthesis of a novel magnetic nanosystem based in superparamagnetic nanoparticles of Fe3O4 and lipase B from Candida antarctica (CALB) and its evaluation in INH synthesis.…”

Magnetic Nanosystem for Cancer Therapy Using Oncocalyxone A, an Antitomour Secondary Metabolite Isolated from a Brazilian Plant

“…The synthesis of magnetite particles has been already described in previous studies [13,39]. Briefly in a co-precipitation processing route, two aqueous solutions of metallic salts containing Fe 2+ /Fe 3+ were mixed in Milli-Q water in the molar ratio of 1:2 to form a Fe 3 O 4 spinel phase.…”