METHOD OF TREATING THE SURFACE OF AN ARTICLE COMPRISING SILICON WHICH IS CROSS-LINKED BY POLYADDITION

摘要

The invention relates to a method of increasing the surface tension (wettability) of an element made from silicon which is cross-linked by polyaddition, using a liquid composition comprising one or more polydimethylsiloxanes (PDMS) alpha , omega -dimethylvinyl, one or more poly(dimethyl)(methylhydrogensiloxy) alpha , omega -dimethylhydrogen-siloxane, optionally a silicon resin, optionally an ethynylcyclohexanol-type cross-linking retarder, optionally an adhesion promoter (vinyltrimethoxysilane/3-glycidoxypropyltrimethoxysilane/butyl titanate) and a platinum cross-linking catalyst. According to the invention, the silicon surface is treated with uniform atmospheric plasma using a plasma projection device consisting of a rotary head comprising one or more plasma nozzles which are offset in relation to the axis of rotation and which can each generate a plasma jet having an axis parallel to said rotation axis. More specifically, but not exclusively, the articles in question are made from silicon coating/flexible support (e.g. textile) composite materials. The invention is suitable for affixing silicon surfaces which are cross-linked by polyaddition =Si-H / =Si-vinyl.