林业工程学报2017，Vol.2Issue(5)：36-40,5.DOI:10.13360/j.issn.2096-1359.2017.05.007
蒙脱土稳定石蜡基Pickering乳液处理材的性能研究
Effect of dicumyl peroxide(DCP) on properties of paraffin wax based Pickering emulsion stabilized by montmorillonite
摘要
Abstract
Wood is a kind of porous material composed of cellulose, hemicellulose and lignin. It contains a large num-ber of hydrophilic hydroxyl groups that are easy to absorb and adsorb water, which may cause deformation and crack-ing. Therefere it is necessary to improve its dimensional stability through wood waterproofing treatment. Pickering e-mulsions are emulsions of any type, either oil-in-water (O/ W), water-in-oil (W/ O), or even multiple, stabilized by solid particles in place of surfactants. Compared with the traditional emulsion with surfactants as emulsifier, Picker-ing emulsion has a wide application prospect due to reducing the amount of surfactants, saving cost and reducing envi-ronmental pollution. In this study, a kind of paraffin wax based Pickering emulsion stabilized by montmorillonite was prepared by using the silane coupling agent and dicumyl peroxide (DCP) as a free radical initiator. The sapwood of poplar (Populus cathayana) was impregnated by the emulsion through the vacuum-pressure process. The effect of the mass fraction of DCP on the particle size distribution and the stability of the emulsion were investigated. In addition, the change of weight percent gain, surface hardness, surface wettability, water absorption and dimensional stability of the treated wood were analyzed, and the microstructures of the treated woods were characterized by the scanning elec-tron microscope (SEM). The results showed that:(1) The average particle size of the emulsion reached micron (less than 2 μm). The particle size of the emulsion was minimal when the content of the DCP was 0. 05%. With the in-crease of the mass fraction of the DCP, the particle size of the emulsion increased. (2) The surface hardness, wetta-bility and water resistance of the treated wood were improved after the emulsion impregnation, and the modification effect was the best when the mass fraction of the DCP was 0. 05%. (3) Since the continuous and uniform wax was at-tached on the surfaces of the wood cell walls, the wood was highly hydrophobic.关键词
蒙脱土/石蜡/Pickering乳液/过氧化二异丙苯/青杨Key words
montmorillonite/paraffin wax/Pickering emulsion/dicumyl peroxide(DCP)/Populus cathayana分类
农业科技引用本文复制引用
陈玉,曹金珍..蒙脱土稳定石蜡基Pickering乳液处理材的性能研究[J].林业工程学报,2017,2(5):36-40,5.基金项目
国家自然科学基金(31570542). （31570542）
