1 College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004; 2 Guangxi Fenglin Wood Industry Group Co.Ltd., Nanning 530031; 3 Dare Wood-based Panel Group Co.Ltd., Zhenjiang 212300
Abstract: Magnesium inorganic foam materials with a large number of closed pores were prepared by chemical foaming process using magnesium cementitious materials as matrix and hydrogen peroxide as foaming agent. The effects of addictive amount of hydrogen peroxide on the foaming ratio, bulk density, compressive strength, bending strength, pore structure parameters and thermal conductivity of foam materials were studied. The results demonstrated that the addition of hydrogen peroxide increased, the bubble nuclei in the slurry increased, and the internal force of the bubble growth increased, which made the pore diameter become larger and the bulk density and mechanical strength reduced. Furthermore, the thermal conductivity decreased, and then increased when the addictive amount of hydrogen peroxide was lager than 16‰. Regression equations of the compressive strength, flexural strength with bulk density of the magnesium inorganic foam materials are y=-6.06+24.19x, y=-0.64+3.82x, respectively, which are closely linear correlations. When the addictive amount of hydrogen peroxide was 8‰, the maximum mechanical strength was obtained. At this time, the pore diameter was the smallest, the pore structure parameter was better, the thermal conductivity was 0.071 W/(m·K) and the bulk density was only 0.54 g/cm3.
1 Wu Yiqiang, Li Xingong, Zuo Yingfeng, et al. Research status on the utilization of forest and agricultural biomass in inorganic wood-based panel[J]. J Forestry Eng, 2016,1(1):8(in Chinese). 吴义强, 李新功, 左迎峰, 等. 农林剩余物无机人造板研究进展[J]. 林业工程学报, 2016,1(1):8. 2 Xiao Junhua, Zuo Yingfeng, Liu Wenjie, et al. Research progress of adhesives for strawboard[J]. Mater Rev: Rev, 2016,30(9):78(in Chinese). 肖俊华, 左迎峰, 刘文杰, 等. 秸秆人造板用胶黏剂研究进展[J]. 材料导报:综述篇, 2016,30(9):78. 3 中国建筑材料联合会. 建材工业“十三五”发展指导意见[J]. 混凝土世界, 2016(10):8. 4 Wang F, Yang L, Guan L, et al. Microstructure and properties of cement foams prepared by magnesium oxychloride cement[J]. J Wuhan University of Technology(Mater Sci Ed), 2015,30(2):331. 5 Yue L, Bing C. New type of super-lightweight magnesium phosphate cement foamed concrete[J]. J Mater Civil Eng, 2014,27(1):04014112. 6 Gu Yaxin, Wang Yanzhao, Wang Xiaomeng. Research progress of foam concrete in different process[J]. Concrete, 2013(12):148(in Chinese). 谷亚新, 王延钊, 王小萌. 不同工艺泡沫混凝土的研究进展[J]. 混凝土, 2013(12):148. 7 Shimizu T, Matsuura K, Furue H, et al. Thermal conductivity of high porosity alumina refractory bricks made by a slurry gelation and foaming method[J]. J Eur Ceram Soc, 2013,33(15):3429. 8 Lei Dongyi, Guo Liping, Sun Wei. Preparation and performance of undisturbed desulfurization gypsum-based foamed concrete[J]. Mater Rev: Res, 2016,30(10):122(in Chinese). 雷东移, 郭丽萍, 孙伟. 原状脱硫石膏泡沫混凝土的制备与性能研究[J]. 材料导报:研究篇, 2016,30(10):122. 9 Huang X, Miao X. Novel porous hydroxyapatite prepared by combining H2O2 foaming with PU sponge and modified with PLGA and bioactive glass[J]. J Biomater Appl, 2007,21(4):351. 10Akthar F K, Evans J R G. High porosity (>90%) cementitious foams[J]. Cem Concr Res, 2010,40(2):352. 11Liu T, Li X, Guan L, et al. Low-cost and environment-friendly ceramic foams made from lead-zinc mine tailings and red mud: Foaming mechanism, physical, mechanical and chemical properties[J]. Ceram Int, 2016,42(1):1733. 12Wang Z, Liu L, Zhou J, et al. Impacts of potassium permanganate (KMnO4) catalyst on properties of hydrogen peroxide (H2O2) foamed porous cement slurry[J]. Construction Building Mater, 2016,111:72. 13Zhang P, Liu H, Gao D, et al. Shear-bond behavior of the interface between FRP profiles and concrete by the double-lap push shear method[J]. J Compos Construction, 2017,21(4):04017012. 14Jiang J, Lu Z, Niu Y, et al. Study on the preparation and properties of high-porosity foamed concretes based on ordinary Portland cement[J]. Mater Des, 2016,92:949.15Xu Wenxiang, Sun Hongguang, Chen Wen, et al. A review of correlative modeling for transport properties, microstructures, and compositions of granular materials in soft matter[J]. Acta Phys Sin, 2016,65(17):178101(in Chinese). 许文祥, 孙洪广, 陈文, 等. 软物质系颗粒材料组成, 微结构与传输性能之间关联建模综述[J]. 物理学报, 2016,65(17):178101. 16Just A, Middendorf B. Microstructure of high-strength foam concrete[J]. Mater Characterization, 2009,60(7):741. 17Jelle B P. Traditional, state-of-the-art and future thermal building insulation materials and solutions-properties, requirements and possibilities[J]. Energy Buildings, 2011,43(10):2549.
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2017, Vol. 31 
