聚合物改性水玻璃均相杂化液对速生杨木的改性

将丙烯酰胺单体在钠水玻璃溶液中聚合制成水玻璃-聚丙烯酰胺均相杂化液,通过浸渍法使杂化液与速生杨木材复合,制成无机/有机木材复合材。SEM、FT-IR表征了速生杨木与杂化前驱液复合前后的结构和形貌变化,研究了复合木材的热稳定性及力学性能的变化,结果表明,用该均相杂化液改性的复合木材WPG为31.6%时,其氧指数为50.3%;并且与素材的力学性能相比,复合木材的抗弯曲强度较素材提高了11.2%,弹性模量提高了18.2%,其径面、弦面和端面的硬度分别提高了15.6%、17.3%和26.2%。

The modification of poplar by water glass-polyacrylamide homogeneous liquid hybrid

The Na_2 SiO_3-PAM inorganic/organic homogeneous hybrid was prepared by polymerization of acrylamid monomer in presence of water-glass solution.Then,the hybrid was introduced into pores of poplar wood by impregnation treatment under vacuum condition and composite wood was produced.The structure of the primary poplar wood and the composite wood was investigated by SEM and FI-IR.The thermal stability and mechanical properties of composite wood was investigated by TG and Oxygen index.The results showed that when weight percent gains(WPG)reached 31.6%,the oxygen index of composite wood was 50.3%.Compared with that of untreated one,anti-bending strength of the composite wood increased by 11.2%,elastic modulus of that increased by 18.2%,but the anti-press strength showed little decrease.