Investigation of the Dimensional Stability of ACQ-Treated Southern Pine When Supplemented with Wax and Different Types of Nano-SiO2

Lili Yu, Junwang Meng, Zhenzhong Tang, Lizhi Zhu, Junyan Zhu, Xiaojun Ma


Southern pine (Pinus spp.) wood cubes were treated with amine copper quaternary (ACQ) solutions supplemented with wax and different types of nano-SiO2 particles. The effects of various types of nano-SiO2 on the dimensional stability of ACQ-treated wood were investigated, including water absorption, swelling, and shrinkage. The results showed that nano-SiO2/wax treatments improved the hydrophobicity of the ACQ-treated wood; various types of nano-SiO2 particles had different effects on the water absorption by the wood. The best water absorption resistance was observed with the ACQ-treated wood modified with nano-SiO2 that had a specific surface area of 380 m2/g. However, the nano-SiO2/wax treatment had a negligible effect on the swelling and shrinkage resistance of the ACQ-treated wood; various types of nano-SiO2 did not affect the swelling and shrinkage of the wood.


Amine copper quaternary (ACQ); Nano-SiO2; Wax; Dimensional stability

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