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Paper Information

Journal:   IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH   SUMMER 2018 , Volume 33 , Number 2 (63) ; Page(s) 166 To 178.

The effect of nano wollastonite on the fire resistance and the adhesion properties of water based acrylic coating on wood surface

Author(s):  RANGAVAR H.*, KHOJASTEH KHOSRO S., Taghipour Javy M.
* Wood Science and Technology Department, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
The objective of this study was the investigation of the effect of adding the wollastonite nanoparticles (casio3) to the water based acrylic coating on fire resistance capability and adhesion strength of coating. The nano wollastonite at the dosage of 0. 5, 1. 50, and 2. 5 wt% weas dispersed into the coating. Ultrasonic device was used to stabilize the nanoparticles on the substrates. The coating process was carried out with and without application of the nanoparticles on the surfaces of spruce and sycamore wood samples and their properties comprising the fire resistance and the adhesion strength were measured. The results showed that adding nano wollastonite to the acrylic coating at the weight percent of 2. 5% (w/w) had the significance effect onto the fire resistance of the samples. In particluar, the effects was observed in case of the delay time of the ignition of the spruce and sycamore samples with the improvement values of 258 and 184% compared with the control samples, respectively. Furthermore, the investigation of adhesion strength of coatings to the surface indicated that the application of nano wollastonites improved the strength properties of coatings. The highest value of this properties was observed in the highest dosage of wollastonite nanoparticles. It should be noted that the performance of nanocomposite coating containing 1. 5 wt% of nano particles on investigated properties was acceptable.
Keyword(s): Nano wollastonite,wood coating,spruce and sycamore,fire retardant,adhesion strength
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