About
19
Publications
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Introduction
Former Marie Currie Individual Fellow (H2020-MSCA-IF-2017).
Project: Smart anticorrosion coatings based on nanocontainers loaded with novel, eco-friendly cationic gemini surfactants as efficient corrosion inhibitors for carbon steel in seawater (EcoGemCoat; Project ID: 792945).
The project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 792945.
Current institution
Reckitt
Current position
- Senior Research Scientist
Additional affiliations
March 2021 - present
September 2018 - February 2021
October 2017 - July 2018
P&G Brussels Innovation Center
Position
- Researcher
Education
September 2013 - September 2017
September 2011 - June 2013
Publications
Publications (19)
Engineered nanomaterials (ENMs), such as silica mesoporous nanocapsules (SiNC), have emerged as a powerful tool for the controlled delivery and release of active compounds in various fields. However, the environmental impact of SiNC on marine biota, particularly when they enter the marine environment through wastewater effluents or direct release f...
Microplastics and nanomaterials are applied in a myriad of commercial and industrial applications. When leaked to natural environments, such small particles might threaten living organisms' health, particularly when considering their potential combination that remains poorly investigated. This study investigated the physiological and biochemical ef...
Nanotechnology is a key enabling technology bringing together chemists, biologists, physicists, and materials science engineers, among others [...]
Encapsulation of active agents (corrosion inhibitors, pH indicators) has been described as a promising approach to impart controlled release and limit detrimental interactions between the active agents and the coating matrix. Mesoporous silica nanocapsules (SiNC) are engineered materials widely used for encapsulation. One synthesis route reported i...
Silica mesoporous nanocapsules are a class of “smart” engineered nanomaterials (ENMs) applied in several fields. Recent studies have highlighted that they can exert deleterious effects into marine organisms, attributed to the use of the toxic cationic surfactant N-hexadecyl-N,N,N-trimethylammonium bromide (CTAB) during the synthesis of ENMs. The pr...
Cationic surfactants are surface-active compounds that can be found in many products, including household and cleaning agents. As a consequence, they tend to be discarded into water streams, ultimately ending up in the aquatic environment. In spite of this environmental issue, studies describing their effects towards marine species are lacking. The...
Six corrosion inhibitors based on dimeric quaternary ammonium salts (gemini surfactants) with a flexible/rigid spacer have been tested for stainless steel in 3 M HCl. Potentiodynamic polarization (linear polarization resistance, Tafel slopes) and electrochemical impedance spectroscopy have been used to determine the corrosion inhibition efficiency...
Four novel cationic gemini surfactants with a spacer functionalised by an oxygen atom were synthesised, characterised using FTIR and ¹H NMR spectroscopy and tested as corrosion inhibitors for stainless steel in 3 M HCl solution. The corrosion inhibition efficiency was determined using potentiodynamic polarisation and electrochemical impedance spect...
Micellization and some ecological properties of new cationic gemini surfactants with oxygen-substituted spacer and hydroxyethyl groups connected to the polar heads have been studied. The incorporation of a hydroxyethyl group in the polar head favors self-aggregation whereas the presence of the oxygen in the spacer increases critical micelle concent...
The corrosion inhibition efficacy of two cationic gemini surfactants with 3-
azamethylpentamethylene spacer on AISI 304 stainless steel in 3 M HCl was investigated by
polarisation measurements and electrochemical impedance spectroscopy (EIS). Following
corrosion testing, the surface of stainless steel samples was studied by scanning electron
micros...
As a corrosion prevention strategy, the use of corrosion inhibitors is one of the simplest and most effective ways of preventing corrosion. Among the organic corrosion inhibitors, cationic surfactants are a potential candidate as they show high inhibition efficacy due to their ability to adsorb onto metal surfaces. Gemini surfactants are considered...
Series of quaternary ammonium-based gemini surfactants with long alkyl chains (C12 and C18) containing different spacers and substituents attached to the polar head group have been synthesized and their aggregation properties in aqueous solution examined. The effect of the hydrophobic chain, the nature and structure of the spacer group and the pola...
Aerobic biodegradability and aquatic toxicity of five types of quaternary ammonium-based gemini surfactants have been examined. The effect of the spacer structure and the head group polarity on the ecological properties of a series of dimeric dodecyl ammonium surfactants has been investigated. Standard tests for ready biodegradability assessment (O...
Questions
Questions (4)
Dear all,
My research is realted with release study of cationic surfacants. Unfortunately because of their structure chromatography is not the best method.
Does anyone have any experiance with this topic?
Thank you in advance for your answers.
Best regards,
Olga Kaczerewska
Hello everyone,
I have a problem with estimating CMC values of oligomeric cationic surfactants from conductometry. My compounds are quaternary ammonium slats, dimeric, trimeric and tetrameric, derivates of benzene. For compounds with short alkyl chain (C4, C6, C8, C10), the relationship between conductivity and concentration is a straight line, no change of slope. Moreover, for tetrameric salts, a graph looks completely different, first a plateau is observed and then the conductivity increases. Has anyone had the same problem and could help me with solving that?
I would be grateful for any help.
Thank you in advance.
Kind regards.
Why is the efficiency of carrosion inhibition of stainlessl steel by C18 cationic surfactants lower than for C16 an C12? Are there any paper about that? I have series of cationic surfactants and for all of them the behavior is the same and the general theory is that the efficiency increases with elongating the carbon chain.
The relation between conductivity and concentration is a straight line, there is no break point so I can't use it.
I would like to use differential method but I don't know how to calculate first derivative of conductivity and concentration.
