Several medical studies highlight the critical importance of nonverbal communication for the therapeutic relationship. Emotions and related phenomena (desires, moods, and feelings) can be revealed through nonverbal behavior, and have been suggested to influence important healthcare aspects including satisfaction, adherence, and even clinical outcomes.
Wearing masks is a common infection control practice in hospitals. Yet, by partially hiding the facial expression, facemasks greatly impair the nonverbal communication between the patient and the caregiver. This has a significant negative impact on the patient's perceived empathy and diminishes the positive effects of relational continuity. Moreover, facemasks may also be experienced as threatening, especially by vulnerable patients and children.
The objective of the HelloMask project is to develop a new type of transparent medical mask with the appropriate filtration and breathability properties. To achieve this ambitious goal, our innovative approach relies on the development of a completely new and unique type of composite membrane that will have both a very low opacity and a good protective filtration level. The HelloMask, which must comply with all medical regulations, could one day replace regular hospital masks. The underlying concept of the project is to re-humanize the healthcare by making the face of the mask wearer visible.
What is special about the project?
No transparent medical facemask currently exists on the market. The HelloMask project, which relies on the development of a new kind of composite material that would merge filtration properties and transparency, necessitates the combination of multiple skills and competencies. Two major Swiss scientific institutions, EPFL (Swiss Federal Institutes of Technology in Lausanne) and Empa (Swiss Federal Laboratories for Materials Science and Technology in St-Gallen), will therefore collaborate to successfully develop this innovative device.
Our mission is to develop new materials suitable to produce transparent surgical masks. The challenge is to achieve a high degree of transparency while still assuring adequate protection and comfort. Good breathability requires the diffusion of air through the material, hence the presence of a large number of pores. In contrast, transparency is hindered by the presence of heterogeneities within materials. In fact, the scattering of light, responsible for the white appearance of opaque materials, is generated at the interfaces between contiguous heterogeneous domains.
In order to produce a new transparent material, capable of providing adequate comfort and protection, we pursued two different approaches. One based on the synthesis of a nano-fabric via electrospinning and a second based on the development of nanoporous membranes. A selection of polymers comprising interesting properties was tested and potential candidate materials for both functional and support layers have been identified. Ultimately, a functional transparent non-woven and a suitable supporting substrate were produced via sequential deposition of selected electrospun fibers, subsequently modified by thermal treatments to obtain mechanical robustness and transparency. A considerable effort was also made towards the assembly and sealing of the individual components. Characterization of the properties of interest was systematically carried out in parallel with the materials development to produce detailed assessment fundamental properties. The results were then used to identify critical aspects and to develop solutions that are progressively allowing us to approach the targeted performances.
D. Kolbuk, P. Sajkiewicz, K. Maniura-Weber, G. Fortunato, Structure and morphology of electrospun polycaprolactone/gelatine nanofibres, European Polymer Journal, 49 (2013) 2052-2061;
G. Yazgan, A.M. Popa, R.M. Rossi, K. Maniura-Weber, J. Puigmartí-Luis, D. Crespy, G. Fortunato, Tunable release of hydrophilic compounds from hydrophobic nanostructured fibers prepared by emulsion electrospinning, Polymer (United Kingdom), 66 (2015) 268-276;
A.G. Guex, D. Hegemann, M.N. Giraud, H.T. Tevaearai, A.M. Popa, R.M. Rossi, G. Fortunato, Covalent immobilisation of VEGF on plasma-coated electrospun scaffolds for tissue engineering applications, Colloids and Surfaces B: Biointerfaces, 123 (2014) 724-733.
Radio show on RTS, November 2018Aargauer Zeitung, November 2018SRF, Puls, November 2018Agefi, November 2018EPFL Magazine N°19, September 2018Empa Quarterly, N°62, September 201824 heures, 27.06.2017EPFL News, 23.01.17Journal des arts et métiers, décembre 2016Tribune de Genève, 15.12.2016Empa News, 02.12.2016Republic Of Innovation, 28.11.2016Debiopharm News, 25.11.2016Startupticker, 25.11.201624 heures, 25.11.2016
Persons involved in the project
Dr. Thierry Pelet
, project leader, Cooperation and Development Center EPFLDr. Klaus Schönenberger
, Program Leader EssentialTech, EPFL, hosts the project at EPFL. Administrative and logistic support.Dr. Sacha Sidjanski
, School of Life Sciences, EPFL, fundraising and communication.Dr. René Rossi
, Head of Laboratory for Protection and Physiology, Empa, hosts the project at Empa. Administrative and logistic support.Dr. Giuseppino Fortunato
, Laboratory for Protection and Physiology, Empa, leads the technical development at Empa.Dr. Géraldine Guex
, Laboratory for Protection and Physiology, Empa, co-leads the technical development at EmpaDr. Davide Barana
, Laboratory for Protection and Physiology, Empa, in charge of the experimental material research
Last update to this project presentation 11.10.2019