Seminário

Power of light: Photo-triggered microcapsules

Sala 8.2.23, FCUL, Lisboa

Bartosz Tylkowski, PhD

Microcapsules are small particles which contain an active agent or core material surrounded by a coating or shell. The utility of microcapsules for efficient cargo storage and targeted release is of considerable importance in fragrance release, personal care and H&F care products.  One of the most challenging tasks and the ultimate purpose of developing delivery systems are to modulate the release of encapsulated cargo substances. Strategies such as heat treatment, pH change, magnetic fields and light-induced morphology change have been used to alter the shell density and integrity, and then to influence capsule permeability. As one of the most interesting parts of stimuli-responsive capsules, photo-stimuli responsive capsules are capable of affecting their micro-/nano-structures in the form of remote control triggered by external light e.g., sun light, without requirement of direct contact or interactions. Moreover, triggering the release of microcapsules by light has a number of advantages over other external stimuli: light does not contaminate the reaction systems; the excitation wavelength can be controlled through the design of the photo-responsive molecule, it is easy to control the time and/or local excitation. The development of such highly light sensitive vesicles is of great importance, especially in the fields of surface sciences and environmental applications, where sometimes light would be the only available stimulus to drive the systems. Our aim was first to synthesize and characterize visible light sensitive monomer and then fabricate photo-triggered microcapsules containing a perfume oil as a core material. These microcapsules were obtained by oil-in-water interfacial polymerization reaction. During the seminar. I will present preliminary results of microcapsules preparation, characterization and controlled perfume release, by means of different techniques (OM, SEM, Light scattering, GCMS).


Dr. Tylkowski is a Polish scientist, who obtained a MSc. Diploma in chemistry from Adam Mickiewicz University, Poznan, Poland in 2004, and a PhD Diploma in chemical science, technology and processes from Universita degli studi di Genova, Genoa, Italy, in 2008. He has a consolidated experience in various aspects of polymeric microcapsules/membranes preparation/characterization as well as bio-inorganic and organic synthesis developed during ca. 13 years of work in the area. Four times he has been a winner of Marie Curie post-doctorate fellowships (OPEN TOK project under 6th FP in Tarragona, Spain (2008-2009); IAPP project under 7th FP in Sofia, Bulgaria (2009-2010); IOF project under 7th FP in Tarragona, Spain/Cincinnati, USA (2013-2016); TecnioSpring COFUND project under 7th FP in Tarragona, Spain (2016-2018)). Twice he has been employed as a post-doctorate researcher under the Procter & Gamble projects where 100% of his work time has been focused on developing new materials for consumer goods. He has participated in 10 competitive (1 time as a PI) and 6 non-competitive research projects (4 times as a PI). He is a co-editor of 5 books; co-author of: 11 book chapters, 20 articles published in indexed journals, 24 articles published in open access journals with external assessment; co-inventors of 4 patents families which were filled as 23 patent applications. His research work was presented 50 times as oral or poster presentations during international or national congresses, and he gave over 30 invited seminars in public and private organizations. Dr. Tylkowski is a co-editor of: special issue of “Coordination chemistry reviews” (IF13.324); “Physical Sciences Reviews”, “Energy today” and he has served as a reviewer in several journals (i.e. Journal of Membrane Science, Langmuir, Chemical Engineering Journal, Industrial and Engineering Chemistry Research). 

11h00
CQB - Centro de Química e Bioquímica

O workshop contribui para aproximar a Ciência e as Políticas Públicas na construção de políticas informadas por evidências.

Composição com os nomes das Universidades participantes

Candidaturas até 25 de maio (mobilidades no 1.º semestre).

Título/data/local do evento, sobre representação de luzes

Quase um ano após o telescópio Euclid ter sido colocado no espaço, vamos ver e compreender as novas imagens de entre as maiores alguma vez feitas do Universo, e aprofundar as primeiras descobertas a serem divulgados pela Agência Espacial Europeia (ESA) a 23 de maio.

Logótipo da conferência

The 2024 Conjugate Margins Conference will be held in Lisbon, Portugal, following the successful event in Marrakesh, Morocco in 2022, and is espected to attract participants from a variety of countries, public and private institutions, students, researchers and professionals.

Seminário de Formação Avançada em Jardins, Paisagens e Ambiente, por André Murgia (Università degli Studi di Cagliari).

Seminário do Centro de Física Teórica e Computacional, por João Carvalho (Soft and Biological Matter - CFisUC, Department of Physics, University of Coimbra, Portugal).

Seminário por Pavel Dvořák (TIFR / Charles University).

Título/data/local do evento e pintura de casa na planta de um pé

Sessão inaugural do Ciclo de Debates "Pensar a Dois Tempos".

Seminário Helena Avelar de Astronomia e Astrologia Antiga, por Francisco Malta Romeiras (Universidade de Lisboa).

O objetivo deste workshop é juntar especialistas portugueses e espanhóis em história política, cultural, científica e marítima do século XVI que, num ambiente informal, irão debater a importância deste intercâmbio.

Título do prémio

As candidaturas decorrem até ao dia 31 de maio.

Título do programa e logótipos das entidades organizadoras, sobre fotografia do espaço

Candidaturas até 03 de junho.

Inscrições até 24 de maio.

Criança a segurar num globo terrestre

A conferência é dedicada ao tema "Desafios em Saúde Planetária: Capacitar Comunidades para a Mudança".

Pormenor de linguagem corporal (braços e mãos) de pessoa a dialogar

Ação de formação para docentes e investigadores de Ciências.

Título/data/local do evento, sobre representação do cérebro humano

Quatro dos doze finalistas da competição são de Ciências ULisboa.

Seminário do Centro de Estatística e Aplicações da Universidade de Lisboa e do Centro de Matemática Computacional e Estocástica, por Fernando Moura (Universidade Federal do Rio de Janeiro, Brasil).

Título/data/local do evento, logótipos da Rede MAR/ULisboa e fotografia de zona costeira

Candidaturas até 31 de maio.

Pormenor de duas pessoas a trabalharem em frente a um ecrã de computador

Inscrições de docentes e investigadores de Ciências até 02 de junho.

Feixes luminosos

Envio de propostas até 20 de junho.

An opportunity to get acquainted with some of the most promising contemporary topics in the exciting interdisciplinary area of scientific culture: the interactions of mathematics and music.

Título/data/local do evento e imagem representativa de pessoa a trabalhar num mundo tecnológico

As Jornadas Científicas 2024 da Universidade de Lisboa são dedicadas ao tema “Impacto Atual e Futuro da Inteligência Artificial no Trabalho”.

Pessoa ajoelhada no hall de edifício pejado de luzes

Ação de formação para docentes e investigadores de Ciências.

Título/data/local do evento, sobre a Tabela Periódica

This year's program will cover two plenary sessions hosted by Susete Pinteus and Hugo Miranda, complemented by oral presentations, flash talks, and poster communications. Finally, a round table discussion will take place at the end of our meeting.

Logótipo do prémio

As candidaturas à 11.ª edição decorrem até 28 de junho.

Páginas