Improved properties of thermally modified wood (TMW) by combined treatment with disodium octoborate tetrahydrate (DOT) and wax emulsion (WE)
Improved properties of thermally modified wood (TMW) by combined treatment with disodium octoborate tetrahydrate (DOT) and wax emulsion (WE)
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DOI：
10.1515/hf-2017-0043
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发表时间：
2018-02
期刊：
影响因子：
2.4
通讯作者：
Wang Wang-Wang;Cong Chen;Jinzhen Cao;Yuan Zhu
中科院分区：
文献类型：
--
作者：
Wang Wang-Wang;Cong Chen;Jinzhen Cao;Yuan Zhu
摘要研究了四水十硼酸二钠（DOT）负载石蜡乳液（WE）对热改性木材（TMW）的预浸渍效果。重点研究了WEDOT-TMW的物理、机械和生物性能的改善。在220℃下进行热改性（TM） 4 h，测定WEDOT-TMW的平衡含水率（EMC）、吸水率、体积膨胀率、抗弯强度、抗霉菌性和抗白蚁性。利用电感耦合等离子体原子发射光谱（ICP-AES）对硼酸盐进行了分析，并根据拟二阶微分模型进行了模型拟合。结果表明，WEDOT提高了WEDOT- tmw的拒水性、尺寸稳定性、抗弯强度以及抗霉菌和抗白蚁能力。由于WE的疏水作用，与DOT-TMW相比，WEDOT-TMW的硼浸出率降低。拟二阶微分模型准确地描述了WEDOT-TMW浸出硼的过程。
Abstract The aim of this study was to investigate the effect of preimpregnation of thermally modified wood (TMW) with paraffin wax emulsion (WE), which was loaded with disodium octoborate tetrahydrate (DOT). The improvements of physical, mechanical, and biological properties of WEDOT-TMW was in focus. The thermal modification (TM) was conducted at 220°C for 4 h. The equilibrium moisture content (EMC), water absorption, volumetric swelling, bending strength, mold and termite resistance of WEDOT-TMW were determined. The boron leaching data were also determined, while the borate was analyzed by Inductively coupled plasma atomic emission spectroscopy (ICP-AES), followed by the model fitting according to a pseudo-second order differential model. The results indicate that WEDOT improved water repellency, dimensional stability, bending strength as well as the mold and termite resistance of WEDOT-TMW. The boron leaching of WEDOT-TMW was reduced compared with DOT-TMW due to the hydrophobic effect of WE. The pseudo-second order differential model describes accurately the boron leaching process from WEDOT-TMW.