The effect of Cellulose Nano fiber (CNF) and Nano clay on the acoustic properties of finger joints of pine wood (Pinus sylvestris) jointed with PVA
Babak Ranjbar 1 , amir lashgari 2 , Ahmad Jahan-latibari 3 , Ajang Tajdini 4
1 - Ph.D. Student, Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran
2 - Associate Professor, Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran
3 - Professor, Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran
4 - Associate Professor, Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran
Keywords: pine wood, CNF, nanoclay, vibration, finger joint,
Abstract :
This research investigates the finger joints of pine wood (Pinus sylvestris) using polyvinyl acetate glue reinforced with cellulose nanofiber (CNF) and nanoclay particles, employing the free vibration method in free-free beams. Finger joints were created at three levels (0%, 0.4%, and 1.5%) in the middle of the samples with polyvinyl acetate adhesive containing cellulose nanofiber and nanoclay. The results indicated a significant increase in the modulus of elasticity and elastic stiffness due to the addition of both 0.4% and 1.5% of cellulose nanofiber and nanoclay. The damping factor values showed a significant decrease by adding both levels of 0.4 and 1.5 cellulose nanofibers and nanoclay compared to the samples without nanoparticles. The values of acoustic conversion efficiency also increased by adding both levels of 0.4 and 1.5 cellulose nanofibers and nanoclay compared to samples without nanoparticles. In general, with the increase in the percentage of use of both nanoparticles, better acoustic properties were observed in finger joints, and the effect of Cellulose Nano Fiber was greater than that of Nano clay.
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