PORCELAIN TILE SURFACE MODIFICATION

Öz

The contact angle of the water droplet exceeds 90 degrees; surfaces are called as hydrophobic. Hydrophobic surfaces are widely used especially in hygienic environments. In the study, it was aimed to obtain the hydrophobic surface on the industrial porcelain tile surface by making two different types of polymer coating based on alcohol and water and modifying the commercially porcelain tile glaze with self-hydrophobic zinc oxide. Morphological development of the surfaces was examined by SEM and phase development was determined by XRD. The contact angle of the polymer coated and uncoated surfaces were measured with contact angle goniometer and the results compared. As a result, it has been found that surfaces coated with alcohol-based polymer have a better hydrophobic effect than surfaces coated with water-based polymer. After industrial firing of glaze compositions with the addition of micron-sized zinc oxide willemite phase was observed while the use of nano-size zinc oxide provided the development of zincite phase. The cracking was observed on the nano zinc oxide modified glaze surfaces which allow the surface to absorb water, so the contact angle couldn’t be measured of uncoated surfaces. The highest contact angle after polymer coating was obtained as 139o in N2 glaze composition.

Anahtar Kelimeler

• Hydrophobic Surfaces
• Porcelain Tile
• Zinc Oxide
• Ceramic Galze
• Contact Angle

PORSELEN KARO YÜZEY MODİFİKASYONU

Öz

Su damlasının üzerinde 90o’den büyük açı yaptığı yüzeyler hidrofobik yüzeyler olarak adlandırılır. Hidrofobik yüzeyler özellikle hijyen gerektiren ortamlarda yaygın olarak kullanılmaktadır. Yapılan çalışmada endüstriyel porselen karo yüzeyinde hidrofobik yüzey özelliğinin alkol ve su bazlı iki farklı türde polimer kaplama yapılması ve kendinden hidrofobik özelliğe sahip çinko oksit tozu ile ticari porselen karo sırının modifiye edilmesiyle eldesi amaçlanmıştır. Yüzeylerin morfolojik gelişimi taramalı elektron mikroskobu ile incelenmiş ve faz gelişimi X-ışınları difraksiyon cihazı ile belirlenmiştir. Temas açısı gonyometresi kullanılarak polimer kaplanmamış ve alkol ve su bazlı polimer ile kaplanmış yüzeylerin temas açıları ölçülüp, kıyaslanmıştır. Sonuç olarak alkol bazlı polimer ile kaplanmış yüzeylerin su bazlı polimer ile kaplanmış yüzeylere göre daha iyi hidrofobik etki gösterdiği tespit edilmiştir. Mikron boyutunda çinko oksit ilavesi yapılan sır kompozisyonlarının endüstriyel fırında pişirim sonrasında willemit (Zn2SiO4) fazı gelişimi gözlenirken, nano boyutta çinko oksit kullanımı zinsit fazı (ZnO) gelişimini sağlamıştır. Nano çinko oksit modifiyeli sırlarda yüzeyde çatlak oluşumu yüzeyin su emmesini sağladığından kaplanmamış yüzeylerin temas açısı ölçümü gerçekleştirilememiştir. Polimer kaplama sonrası en yüksek temas açısı 139o olarak N2 kodlu sır kompozisyonunda elde edilmiştir.

Anahtar Kelimeler

• Hidrofobik Yüzeyler
• Porselen Karo
• Çinko Oksit
• Seramik Sır
• Temas Açısı

Kaynakça

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