The difference between wood supply and demand was sought to be alleviated by considering fast-growing Chinese fir wood, based on its characteristics of large yield but poor performance. Modification of fast-growing Chinese fir wood is an effective method for improving the wood's characteristics. Sodium silicate/magnesium chloride-modified fir (SS-MCMF) was prepared by adding magnesium chloride (MC) in the process of silicate (SiO₃²⁻) impregnation, with sodium silicate (SS)-modified fir (SSMF) and natural wood (NW) as references. The products were then tested for physical and mechanical properties and bonding mechanisms. The results showed that the bending strengths of SSMF and SS-MCMF specimens were increased by 36.16 and 62.97%, respectively, compared with NW specimens, and the compressive strength of SSMF and SS-MCMF specimens increased by 39.90 and 90.67%, respectively. The hardness of SSMF and SS-MCMF specimens increased from 3685 (of NW) to 5534 and 5843 N, respectively. The water absorption rate of samples after 96 h water exposure decreased from 159.25 to 97.39 and 83.06%, respectively, and the leaching rate at 14 days decreased from 16.01 to 8.92%. In addition to improvements in physical, mechanical, and fixing properties, FTIR and XRD analyses confirmed that SS damaged lignin and hemicellulose in this wood and that Si–O–Si and Si–O–C structures were indeed formed in these modified samples. The addition of MC effectively protected the wood from possible SS damage while also greatly improving its performance. Therefore, the combination of SS and MC for modifying Chinese fir was an efficient, green, and environment-friendly impregnation modification method.

基于杉木产量大但性能差的特点，通过考虑快速生长的杉木木材，寻求缓解木材供需差异。速生杉木的改性是改善木材特性的有效方法。在硅酸盐(SiO ₃ ^2-) 浸渍，以硅酸钠 (SS) 改性杉木 (SSMF) 和天然木材 (NW) 作为参考。然后测试产品的物理和机械性能以及粘合机制。结果表明，与NW试样相比，SSMF和SS-MCMF试样的抗弯强度分别提高了36.16%和62.97%，SSMF和SS-MCMF试样的抗压强度分别提高了39.90和90.67%。SSMF 和 SS-MCMF 试样的硬度分别从 3685 (NW) 增加到 5534 和 5843 N。样品浸水96 h后吸水率分别从159.25%下降到97.39%和83.06%，14天浸出率从16.01%下降到8.92%。除了物理、机械和固定性能的改进，FTIR 和 XRD 分析证实 SS 损坏了该木材中的木质素和半纤维素，并且在这些改性样品中确实形成了 Si-O-Si 和 Si-O-C 结构。MC 的加入有效地保护了木材免受可能的 SS 损坏，同时也大大提高了其性能。因此，SS和MC结合改性杉木是一种高效、绿色、环保的浸渍改性方法。