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Nanotechnologies, Functional Surfaces

UST’s Manager: David GUERIN

Objectives

Functionalise the paper surfaces to develop their properties.

Competences

Characterisation of coated and/or functionalised papers (printing/writing, barrier, speciality and coated boards).
Characterisation of coating colours (rheology, physico-chemistry)
Liquid/paper interactions.
Traditional coating processes, curtain coating, spray coating, plasma treatment, chromatogenic chemistry.
Calendering: materials, processes and paper properties.
Consultancy and expertises: coating, calendering, barrier.

Activity

The objective of functionalising paper and board surfaces is to modify the chemistry/or the geometry of the surface in order to confer them specific properties; for example, improvement in visual aspect, printability, development of barrier properties.
To respond to the improvement in paper quality and in reduction of production costs, both traditional operations for surface treatment (coating and calendering) are undergoing recent developments that give rise to research work.
Parallel to traditional processes, CTP leads research activities linked to surface functionalisation by using nanocoats of material deposited chemically (grafting) or physically (plasma).
Therefore, the activities of the Scientific and Technological Unit «Nanotechnologies, Functional surfaces» allow the assessment of the paper quality and provide the expertise on the traditional processes, support the development of new coating processes (namely curtain coating) and to be the mainspring of the development of nanotechnologies in the field of surface functionlisation.

Materials

• Coating laboratory (usual measuring means for coating colours, rheological and physico-chemical characterisation means).
• Barrier laboratory (permeability to oxygen, water vapour and to greases).
• Paper-quality laboratory (Topo 3D, Kheops, microgloss).
• Traditional coaters, curtain coater, disperser, high-speed laboratory calender, drop observation system by rapid video camera (Drop Measurement Device).