APTES-Modified Nanocellulose as the Formaldehyde Scavenger for UF Adhesive-Bonded Particleboard and Strawboard

Abstract

This work examines the possibility of applying non-modified nanocellulose and nanocellulose functionalized with 3-aminopropyltriethoxysilane (APTES) as a formaldehyde scavenger for commonly used urea-formaldehyde (UF) adhesive. The effect of silanization was determined with the use of Fourier transform infrared spectroscopy (FTIR), flame atomic absorption spectrometry (FAAS), and elemental analysis. Moreover, the ability of cellulosic nanoparticles to absorb the formaldehyde from an aqueous solution was investigated. After homogenization, cured UF adhesives were examined with the use of FTIR, energy-dispersive spectroscopy (SEM-EDS), and the perforator method to determine the content of formaldehyde. Manufactured boards made of rape straw particles and wood particles were tested in terms of their physico-mechanical properties and formaldehyde emission. Studies have shown that the applied method of silanization was effective. Furthermore, in the case of non-modified nanocellulose, no sign of formaldehyde scavenging ability was found. However, the functionalization of cellulosic nanoparticles with APTES containing an amino group led to the significant reduction of formaldehyde content in both the aqueous solution and the UF adhesive. The mechanical properties of both strawboards and particleboards were improved due to the nanocellulose reinforcement; however, no effect of silanization was found. Nevertheless, functionalization with APTES contributed to a decrease in formaldehyde emission from boards, which was not found in the case of the introduction of non-modified cellulosic nanoparticles.

Fabrication of ROS-responsive nanoparticles by modifying the interior pore-wall of mesoporous silica for smart delivery of azoxystrobin

“…Additionally, peaks corresponding to Si-O-Si at 462.39, 802.76, and 1015 cm À1 and NH's bending and stretching vibrational modes at 1637 cm À1 and 3400 cm À1 were identified. [39][40][41] Notably, characteristic peaks at 1554 cm À1 for the CH-CH of benzene also confirmed that the MSN-PHS was obtained. 42 The weight loss of MSN was 11.0%, which increased to 27.5% after trimming PHS-APTES to MSN.…”

Modified Buckwheat Husk as a Filler for Urea–Formaldehyde Resin in Plywood Production

“…The mixture was stirred for 30 min and then the ground husk particles were soaked in the solution in a 1:5 mass ratio. The pH of the solution was decreased to 4 with acetic acid to increase the silanization effectiveness [32]. The reaction was run at room temperature for 3 h while stirring at 400 rpm.…”

Effects of nanoclay modification with aminopropyltriethoxysilane (APTES) on the performance of urea–formaldehyde resin adhesives

“…(Tohmura et al 2001;Park and Jeong 2011b;Zaidon et al 2015;Antov et al 2020;Kristak et al 2022). It is still an aim for UF resins to develop such additives that lessen harmful emissions without degrading the mechanical and physical properties of wood-based composites (Kawalerczyk et al 2022).…”