Antiadhesive materials

Surface properties The molecular configuration of PTEE imparts a high degree of antiadhesiveness to its surfaces, and for the same reason these surfaces are hardly wettable. PTFE possesses the lowest friction coefficients of all solid materials, between 0.05 and 0.09. The static and dynamic friction coefficients are almost equal, so that there is no seizure or stick-slip action. Wear depends upon the condition and type of the other sliding surface and obviously depends upon the speed and loads. 

Pressure-sensitive adhesives are permanently tacky substances that adhere spontaneously to the surfaces of most materials with only light pressure [36]. Their adhesiveness is relatively nonspecific, although the individual products show different adhesion values on different substrates. Pressure-sensitive adhesives are used mostly for coating supports, for example, paper and film tapes, adhesive labels, or self-adhesive decorative sheeting. The adhesives are applied to the supports as solutions, dispersions, or melts. After the adhesive has set, the pressure-sensitive adhesive is present as a thin film on the support and, until it is used, is covered by suitable antiadhesively finished materials, for example silicone paper or siliconized polyethylene film. In some cases, the pressure-sensitive adhesive is also applied to the masking material, and the film of... 

Similarly, silk functionahzation of antiadhesive poly(methacrylic acid) brushes on titanium increased cell adhesion, but maintained its antiadhesive properties towards bacteria (Zhang et al., 2008). In some cases, the base material already represents a tissue adhesive surface and creating patches of nonadhesive PEG islands at the right separation distance excludes bacterial adhesion without negative effects on tissue cell adhesion (Wang et al., 2011). 

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