硅酸钠增强植物纤维基超低密度材料的研究

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0.1MPa增加到1.0MPa;静曲弹性模量从12.4MPa增加到87.3MPa,静曲强度从0.2MPa增加到7.3MPa;抗压强度（10%压...

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

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 ℃.