Improvement of dimensional stability of wood by in situ synthesis of organo-montmorillonite: preparation and properties of modified Southern pine wood
Improvement of dimensional stability of wood by in situ synthesis of organo-montmorillonite: preparation and properties of modified Southern pine wood
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DOI：
10.1515/hf-2013-0038
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Wang Wang-Wang;Yuan Zhu;Jinzhen Cao;Ru Liu
中科院分区：
文献类型：
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作者：
Wang Wang-Wang;Yuan Zhu;Jinzhen Cao;Ru Liu
摘要南方松（Pinus spp.）以两步法用钠蒙脱土（Na-MMT;浓度为1%、2%和4%）和二癸基二甲基氯化铵（浓度为2%）依次浸渍木材，以在木材内形成有机蒙脱土（OMMT）。浸渍样品的特征在于通过X射线衍射，傅里叶变换红外光谱，和扫描电子显微镜/能量色散X射线光谱分析。研究了改性后试样的吸水率、抗溶胀率、抗压强度和表面硬度。在第一步中，木材浸渍Na-MMT，在第二步中，Na-MMT通过原位合成转化为OMMT，粘土的硅酸盐层插入细胞壁中。结果，改性木材的尺寸稳定性作为增加的粘土浓度的函数得到改善。与未改性木材相比，改性木材的抗压强度和表面硬度也有较大提高。
Abstract Southern pine (Pinus spp.) wood was impregnated sequentially with sodium montmorillonite (Na-MMT; in concentrations of 1%, 2%, and 4%) and didecyldimethylammonium chloride (in a concentration of 2%) in a two-step method to form organo-montmorillonite (OMMT) inside the wood. The impregnated samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy/energy-dispersive X-ray spectroscopy analyses. Moreover, the water absorption, anti-swelling efficiency, compression strength, and surface hardness of the modified samples were investigated. In the first step, wood is impregnated with Na-MMT, and in the second step, Na-MMT is transformed to OMMT by in situ synthesis and the silicate layers of the clay are intercalated into the cell wall. As a result, the dimensional stability of the modified wood was improved as a function of increased clay concentration. The compression strength and surface hardness of OMMT-modified wood were also improved greatly compared with the untreated control.