The physicochemical characterization of fluoropolymer-modified polysiloxane coatings

Z. Dobkowski; M. Zielecka

Published : 2022-09-19

Vol. 46 No. 11-12 (2001)

The physicochemical characterization of fluoropolymer-modified polysiloxane coatings

Z. Dobkowski M. Zielecka

Abstract

A polymer hybrid system, containing a crosslinked polysiloxane (SIL) and fluoropolymer (PTFE), was developed and it has been applied as the antigraffiti coatings. Surface physicochemical properties of the system were investigated, using the tensiometry to determine surface wetting properties, such as the dynamic contact angle (DCA), the X-ray photo-electron spectroscopy for the surface chemical analysis (ESCA/XPS), and the atomic force microscopy (AFM) to observe the surface morphology and roughness. Then, the surface free energy (SFE) and its polar and dispersive parts were calculated from DCA data, as well as the surface elemental composition: F, C, Si, O, in particular the Si and F atoms distributions in the surface layers (XPS), and the roughness parameters of the surface (AFM). It has been found that the following factors are crucial for applications of the SIL/PTFE system as coatings for permanent protection of building materials against graffiti paintings: (a) the wettability, it should be low, (b) the chemical composition, an excess of F atoms at the surface is required, (c) the morphology of surface layers, i.e., tightly packed small domains and the low roughness. Optimum hydrophobic (e.g. antigraffiti) properties of the SIL/PTFE system were obtained for the compositions of a regular spherical domain pattern at the surface with the minimum surface roughness. It occurred at about 20 - 45 wt. % of PTFE content in the system. It is suggested that the regular nanopattern of F atoms of PTFE and CH3 groups of crosslinked SIL component at the surface is immobilized by the semi-interpenetrating (semi-IPN) structures. The enrichment of the surface layers with immobilized F can be considered as a key factor for achieving excellent application results.

Keywords

kompozycja antigraffiti ; polisiloksan ; politetrafluoroetylen ; zwilżalność ; warstwa powierzchniowa ; skład elementarny ; morfologia ; chropowatość powierzchni polysiloxane/PTFE composition ; antigraffiti coatings ; wettability of surface ; elemental composition of surface ; structure and roughness of surface

Similar Articles

J. Dziuba, M. Niklewicz, A. Iwaniak, M. Darewicz, P. Minkiewicz, Structural properties of proteolytic-accessible bioactive fragments of selected animal proteins , Polimery: Vol. 50 No. 6 (2005)
E. Wierzbicka, I. Legocka, Elastomeric styrene-isoprene-styrene (SIS) block copolymer modified with a borone derivative as compatibilizer for PE-LD/PS an PP/PS mixtures , Polimery: Vol. 56 No. 3 (2011)
P. Łoś, A. Łukomska, S. Kowalska, R. Jeziórska, J. Krupka, Obtaining and properties of polyolefin composites metamaterials with copper micro- and nanoflakes , Polimery: Vol. 56 No. 4 (2011)
J. Kruželák, I. Hudec, R. Dosoudil, Elastomeric magnetic composites – physical properties and network structure , Polimery: Vol. 57 No. 1 (2012)
R. Jeziórska, A. Szadkowska, B. Świerz-Motysia, J. Kozakiewicz, Effect of "core-shell” polymeric nanofiller on the structure and properties of polylactide and thermoplastic corn starch blend , Polimery: Vol. 57 No. 5 (2012)
V. Rabova, Study of the structure and rheological and mechanical properties of silicone rubber/montmorillonite nanocomposites , Polimery: Vol. 54 No. 11-12 (2009)
Paulina Kropidłowska, Emilia Irzmańska, Magdalena Jurczyk-Kowalska, Evaluation of damage of polymeric toecaps used in protective footwear – case study , Polimery: Vol. 64 No. 7-8 (2019)
Jolanta Świderska, Waldemar Świderski, Adrian Antosik, Effect of radiation source distance on the properties of dental fillings , Polimery: Vol. 64 No. 7-8 (2019)
E. Sasimowski, Studies in the effectiveness of a new generation extruder. Part II, The shape of the inner surface of the barrel rotating sleeve , Polimery: Vol. 57 No. 4 (2012)
B. Gutarowska, M. Piotrowska, Z. Żakowska, K. Gwoździński, Analysis of the usefulness of adenosine triphosphate (ATP) determination and fluorescence microscopy methods for the evaluation of the viability and adesion of bacteria on the surface of bioactive polymers , Polimery: Vol. 57 No. 3 (2012)

<< < 35 36 37 38 39 40 41 42 43 44 > >>

You may also start an advanced similarity search for this article.

Details

Statistics

Authors

Download files

PDF

Zasady cytowania

Dobkowski, Z., & Zielecka, M. (2022). The physicochemical characterization of fluoropolymer-modified polysiloxane coatings. Polimery, 46(11-12), 835–839. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/2141

Citing articles via

Statistics

Total abstract views : 0

PDF Downloads : 0