酸钠增强植物纤维基超低密度材料的研究

谢拥群; 刘景宏; 林铭; 刘小政; 童雀菊

酸钠增强植物纤维基超低密度材料的研究

1 福建农林大学材料工程学院2 加拿大拉瓦尔大学木材研究中心

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出版历程
- 收稿日期: 1899-12-31
- 修回日期: 1899-12-31
- 发布日期: 2012-01-29

Reinforcement of plant fiberbased ultra low density material with sodium silicate

1 Faculty of Material Engineering, Fujian Agricultural and Forestry University, Fuzhou, 350002, P. R. China; 2 Wood Industry Centre, Laval University, Quebec, G1P0A6, Canada.

摘要

摘要: 为增强和改变材料的防火性能，利用液体发泡原理，在制备超低密度植物纤维材料过程中添加硅酸钠、硫酸铝。结果表明：添加40%的硅酸钠和相应的硫酸铝可以提高材料的力学性能。其内结合强度从0.1 MPa增加到1.0 MPa；静曲弹性模量从12.4 MPa增加到87.3 MPa，静曲强度从0.2 MPa增加到7.3 MPa；抗压强度(10%压应变)从0.2 MPa增加到3.7 MPa。阻燃性能得以增强，氧指数达到了42%；在温度低于700 ℃的范围内，无明显的失重和热解放热现象。
- 液体发泡 /
- 植物纤维 /
- 超低密度材料 /
- 阻燃
Abstract: Inorganic materials such as sodium silicate and aluminum sulfate can be used as additives to improve mechanical and fire resistance performances of plant fiberbased ultra low density material (ULDM) during its making process using the liquid frothing approach. Following process was used to make sample mats: after fiberization in a refiner, adding resin and surface active agent in the pulp solution, then adding sodium silicate and aluminum sulfate, well mixing the solution; after solution frothing, mat forming and drying, a plant fiberbased ultra low density mat was made. Compared with 0 inorganic additive, using 40% sodium silicate and corresponding amount of aluminum sulfate could increase internal bonding strength of the ULDM from 0.1 MPa to 10 MPa, MOE from 12.4 MPa to 87.3 MPa; MOR from 0.2 MPa to 7.3 MPa and compressive strength (at 10% strain) was ranging from 0.2 MPa to 3.7 MPa. This also can reinforce fire resistance performance and oxygen index reach a higher level of 42%. No significant weight loss and exothermic decomposition could be observed below 700 ℃.
- liquid foaming /
- plant fiber /
- ultra low density material /
- fire resistance